Antenna resonance calculator The dimensions of the patch antenna are calculated using the following formulae. Resonant frequency of an antenna depends on the height above ground and the conductivity of the The resonant frequency of an LC Circuit is the frequency at which the inductive reactance and capacitive reactance of the LC circuit are equal. Provided for your use by CSGNetwork. 8-30 MHz. Small transmitting loop antennas, commonly called "magnetic loops" or "mag loops," can give surprisingly good performance when they are carefully designed and constructed. 5. This tool is designed to calculate the resonant frequency of a tank circuit if the capacitance and inductance values are known. Microstrip Circular Patch Antenna Calculator Technical Information A small loop antenna appears as a very large resonant circuit. Place a 1:1 Balun on the Antenna end of the Feedline. This page contains various javascript based calculators for electronics. An antenna with single straight rod is the whip antenna. Following that is a section that allows the user to create a custom trap using their specified frequency, coax, and coil form. m. Invented by the Germans for use on their zeppelins, this antenna is also referred to as a Zepp antenna. Given two of the three values—inductance, capacitance, or resonant frequency—this tool will calculate the missing third variable. Whip Antenna CalculatorThis everything RF calculator calculates the various parameters related to the design of a Whip Antenna. However, ultimate responsibility for the proper use of your equipment lies with you. With this tool, it is possible to calculate and analyze the performance of 'small' magnetic loop antenna's. Output is length, width of patch, resonant input resistance. Keeping it short, the length of a dipole antenna determines the optimal frequency at which the antenna operates (dipole antennas are, in their simplest form, resonant antennas) — with some caveats. See loopantenna. Insulated, Length = Sq-side = Diam = feet. How Does the Calculator Work? The calculator uses the formula: Yes, trap dimensions can be adjusted slightly to fine-tune antenna resonance and optimize performance for specific frequencies. Ω Ohm’s Law Calculator Ω – Enter 2 values from Voltage, Current, Power or Resistance, to find the remaining two. When the frequency of the electric wave is equal to the resonant This MATLAB function marks the resonant frequencies on the impedance plot of the specified antenna or array in the specified frequency range. INVERT VEE = Inches in overall length and Inches for one side. resonant below the desired resonant frequency. 90° apex, Length = Len/2 = Rise = Run/2 = feet. The correct lengths for the various models will be displayed in the chart. Dipoles will provide low take-off angles for good over-the-horizon skip propagation when it is about one-half wavelength above the ground. Oct 7, 2024 · Use this calculator to find the dimensions of a Dipole antenna [1] designed to operate at a specified wavelength or frequency. This is a true unbalanced antenna, with a feed impedance of around 50Ω and therefore a great Oct 24, 2024 · A random wire antenna length calculator takes the desired frequency range (in MHz) and suggests wire lengths that are less prone to resonance issues. Online calculators for antenna design, wireless, RF, electronics, and various engineering fields. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. Calculator 1: This calculates the Resonant Frequency of the LC tank circuit by entering the inductance and capacitance values. What is a 1/4 Wave Antenna Calculator? Definition: This calculator determines the optimal length for a quarter-wave antenna based on the operating frequency. The microstrip patch antenna calculator determines the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. Click on Calculate and the optimum length for that combination Calculates resonant frequency of a loop antenna, correcting for distributed capacitance. A microstrip patch antenna, see Figure 2. The Helical Antenna Calculator is a specialized tool designed to assist engineers, hobbyists, and students in designing helical antennas, which are commonly used in satellite communications, Wi-Fi, and radio frequency (RF) applications. Due to the large (relatively speaking) size of this inductor, radiation very easily takes place. The dimensions of circular patch antenna is calculated for the dominant \ (TM_ {110}^ {z} \) mode, where \ (z\) is the vector perpendicular to the circular patch. This calculator simplifies the process of determining key parameters such as antenna gain, circumference, pitch, and resonant frequency based on user inputs This calculator estimates the inductance required for a loading coil when an antenna is physically shorter than the ideal resonant length at a given frequency. Explore the calculators below to simplify your antenna design and analysis. The chart estimates, over the length of an approximate quarter wavelength, the required change in length to shift the fundamental antenna resonance by a specific amount of kHz. You will also find out what's the q of the RLC circuit. Learn about slot antenna design, specifications, and applications. 🙋 Head to our resonant frequency calculator to learn about the basics of LC circuits and the source of radiofrequency waves. The first part is just a short introduction into trap antennas. For some low frequency loop Method # 2 Tuning a Dipole Antenna for Resonance! Find a Ham Radio Dipole Resonant Length Most dipoles will require a little "trimming or adding" to resonate at the desired frequency. It determines length, resonance, and expected performance based on your input frequency, making it ideal for beginners and experienced builders aiming for reliable coverage. 1. 56 MHz. Find tools for building log periodic, vertical, Yagi, loop, and more antennas. Formula for Helical Antenna Design Calculator A helical antenna is a type of antenna that is considered to be a hybrid of a loop antenna and a dipole antenna. Optimum loading coil Q is attained when the coil Length/Diameter ratio is at or near 0. 0 The microstrip patch antenna calculator determines the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. 0 The Microstrip Patch Antenna Calculator is a powerful tool that enables engineers, students, and researchers to calculate the dimensions of a microstrip patch antenna quickly and accurately. The larger the wire, the wider the bandwidth. Resonant Frequency Calculator This resonant frequency calculator employs the capacitance (C) and inductance (L) values of an LC circuit (also known as a resonant circuit, tank circuit, or tuned circuit) to determine its resonant frequency (f). Antennas, Unit-Conversions, VSWR, RF power, DSP, EMC and much more RF related topics. Welcome to the Vertical Antenna RF Choke / Earth Termination Choke Calculator This tool is designed to help you create an effective RF choke for ground-mounted vertical antennas. Its simplicity comes from being a single-wire design, and the antenna is typically fed at one end, making it easier to deploy compared to other antenna types. The loop itself can be viewed as a large single turn inductor of this circuit. Users input their desired resonant frequency to obtain precise measurements for four popular antenna types: standard flat-top dipole, inverted Vee, quad loop, and equilateral delta loop. In practice, the trap is simply tuned by shortening the coax until it is resonant at the desired frequency, or is used as is, and the wire lengths are adjusted as needed. Listed under the Antennas/Antenna Calculators category that is about Calculate and Design Antennas . This program overestimates the length if the conductor diameter is larger than 1/20 wavelength. Enter the desired frequency and select the wavelength. Aug 23, 2024 · A set of tools for electrical parameter conversions and calculating antenna characteristics and propagation metrics. For example, a dipole cut for 7. Here is a good recommendation in 7 steps. The formula used is: L = (L r L a) 7500 f 2 Where: L = required inductance (µH) Lr = resonant length = 468 / f (in feet) La = actual antenna length (in feet) f = frequency in MHz The constant 7500 comes from empirical derivations and Complete RF Amplifier Design and Analysis Calculator Decibel Calculator Friis Path loss Calculator Helical Antenna Design Calculator LC Resonance Calculator L Matching Network Calculator Maximum Field Strength Calculator Maximum Flux Density Calculator Microstrip Inductor Calculator PI and T Pad Attenuator Calculator Quarter Wavelength Ahh, the good old quarter wave ground plane! This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. Calculator Enter Frequency or wavelength of operation, Velocity factor % Pasternack's Waveguide Calculator provides the cutoff frequency, operating frequency range and closest waveguide size for a rectangular waveguide based on the custom inputted broad wall width. There are usually four radials, three being a minimum, but you could use up to six. We know that many antennas can effectively resonate and work in more than one band, one of which is called a Trap antenna. The dimensions of rectangular patch antenna is calculated for the lowest resonant frequency \ (TM_ {010} \) (dominant) mode. Although this online calculator is intended to assist with designing and building homemade, ham radio loop antennas for use in the HF bands, magnetic antennas have been constructed that function in the VHF or even the UHF May 3, 2025 · The resonant frequency is a crucial parameter for antenna design, as it determines the frequency at which the antenna radiates most efficiently. 2. HF Oct 3, 2024 · Antenna traps are critical components in the design and operation of antennas, especially those that need to operate efficiently over multiple frequencies. You only need to type in the numbers in the Cyan boxes. Whether you’re working on projects, experiments, or expanding your knowledge of antenna principles, these tools will help streamline your Jul 4, 2024 · The Antenna Trap Calculator is an indispensable tool for amateur radio enthusiasts and professional communication engineers who design and utilize multi-band antennas. This calculator estimates the length of a vertical antenna based on operating frequency, selected wavelength fraction (¼-wave, ½-wave, etc. Below you will see the necessary information on RLC circuits and what is the resonant frequency of the RLC circuit, sometimes abbreviated to RLC circuit frequency. May 6, 2023 · An antenna for (Enter a Freq Above) MHz will be approximately: DIPOLE = Inches in overall length and Inches for one side. Requiring no power, it takes advantage of the resonant properties of an inductor and a capacitor connected in parallel to receive weak AM stations. Nov 21, 2022 · Microstrip patch antenna bandwidth A Microstrip Patch Antenna Calculator The calculator tool shown below will provide input impedance and the dimensions of a microstrip patch antenna given a desired operating frequency, substrate dielectric constant (Dk), and distance to the reference plane through the substrate (h). «« BETA »» 📻 Basic Amateur Radio Calculators Frequency (MHz) to Wavelength (m) Wavelength (m) to Frequency (MHz) Ohm's Law Calculator Decibel (dB) Calculator Resistor Color Code Calculator (4-Band) Capacitor Value Calculator Current Draw vs Battery Life Calculator SWR (Standing Wave Ratio) Calculator VSWR to Return Loss Calculator Voltage Divider Calculator 📡 Antenna-Related Resonant Frequency Calculator – Inductance Capacitance LC circuit Type in the L and C values, selecting the units you wish to use and click on the calculate button. The Balun matches the Balanced Antenna into the Unbalanced The Antenna Loop Calculator is an invaluable tool for anyone involved in antenna design, whether you’re a radio enthusiast, a telecommunications engineer, or a hobbyist. For precise tuning, it is recommended to use an antenna analyzer to measure the Standing Wave Ratio (SWR) and make adjustments to the antenna length as needed. The substrate the height \ (h \) is much smaller than the resonant wavelength \ (\lambda \). The calculator provides comprehensive measurements including leg lengths Vertical Antenna Calculator This calculator is designed to give the vertical length (height) of a particular antenna, for the frequency and wavelength chosen. But also older large phased array antennas used the principle because the slot radiators are a very inexpensive way for frequency scanning arrays. It aids in calculating the resonant frequency of an antenna trap, which is crucial for allowing a single antenna to operate effectively at multiple frequency bands. v1. By entering a few key parameters, such as the desired operating frequency, the calculator computes the necessary wire length for optimal resonance and performance. 2 (b), is an example, but the underlying principle is that an array of current filaments generates EM components that combine to create a propagating field. This online resonant frequency calculator is divided in to three calculators. At a certain frequency, the trap presents a high impedance, effectively isolating parts of the antenna and enabling it to operate on Dipole Antenna Calculator This calculator helps you design standard dipole antennas. For example, a quad designed for the 14 MHz amateur band (20-meter wavelength) will have different dimensions than one Calculate and simulate magnetic loop antenna values based on radius, material, and frequency. Half-wave Dipole + Inverted-V Resonant on odd harmonics. Slot antennas are an about λ/2 elongated The loop area in square metres is: The loop wire length in metres is: The loop inductive reactance in ohms is: The required capacitance for resonance in nF is: The loop radiation resistance in ohms is: The loop current in A is: The loop voltage in V is: A brand-new developed Transmit Magnetic Loop antenna calculator. All you need to do is enter the desired resonant (center) frequency in the form below, then click "Calculate". Purpose: It helps radio enthusiasts, engineers, and technicians design antennas for specific frequencies. Use the resonant frequency calculator to check out the resonant frequency in an LC circuit. MHZ The vertical length is feet. Calculate parameters for loop antennas using this handy calculator. Mar 4, 2025 · Resonance and Wavelength An antenna resonates most efficiently at a specific frequency, where its physical dimensions align with the corresponding wavelength. Remember to cut your antenna wire longer than shown here and then adjust the length to the desired frequency. html for a description. calculates resonant frequency of a loop antenna correcting for distributed capacitance . Use this program for estimated values, but use an SWR meter to prune to final dimensions. The Antenna Loop Calculator becomes a compass, guiding engineers, hobbyists, and radio enthusiasts in optimizing their antennas for specific frequencies. Sep 1, 2021 · This chart serves as an aid in trimming the length of HF antennas. 2 days ago · Explore a variety of online antenna calculators for designing and calculating antenna dimensions. Calculate resonant antenna lengths for a given frequency with optional velocity factor, practical examples, and copy-ready summaries. They are often used in navigation radar usually as an array fed by a waveguide. The NFC antennas are typically made of spiral loop (Figure 1). Resonant antennas are inherently narrowband because of the reliance on the establishment of a standing The standard ground plane antenna consists of a vertical radiator which is insulated and centered between 4 horizontal surrounding radials which extend out from the base of the antenna. K7MEM’s article on coax traps Definition: This calculator determines the optimal antenna length based on the frequency of operation and desired wave fraction. Learn about loop antenna types, characteristics, and the formulas behind their design. Due to the fringing of fields the electrical size of Feb 1, 2025 · The EFHW antenna design dates back to early radio communication experiments, where a half-wave resonant antenna was used to transmit signals. I have, in good faith, given my best efforts to provide a calculator that will save ham operators time in setting up their antennas. When operating at the resonant frequency, an LC tank circuit absorbs maximum power. By inputting values such as the operating frequency, substrate thickness, dielectric constant, patch height, and patch width, users can calculate the resonant frequency and effective dielectric constant of Jul 30, 2022 · In its basic configuration, a dipole antenna has a T-shape, but there's flexibility to this rule. This calculator can determine the length and the width of the microstrip patch antenna, when the operating frequency, dielectric constant, and the height of the substrate is entered. Vertical Antenna Calculator This calculator is designed to give the vertical length (height) of a particular antenna, for the frequency and wavelength chosen. Trap Antenna Design Calculator Trap antenna works: TRAP is like an electronic switch. Length is also overestimated at very high frequencies. What is Resonance? Oct 3, 2024 · Resonance frequency calculation plays a pivotal role in various applications within electrical and electronics engineering, particularly in the design and analysis of circuits. Notes: The Magloop Antenna Calculator was developed to predict the characteristics of a small-transmitting-loop (aka "STL", "magnetic loop" or "magloop") antenna, given physical dimensions entered via slider widgets. Calculate resonance frequencies for LC circuits and vibrations with our free calculator. dBm, dBW, µW, mW, W, kW and MW Oct 20, 2025 · Current version V2403, see the news about V2401 on the site! FREE DOWNLOAD, WinRFCalc is the best Windows RF calculator toolbox for EMC, RF and Radio engineers. Enter the formula for the antenna calculation (normally 234/f): divided by Freq. I have come up with a trio of web-based calculators which should help you design and build your own wire antennas - no need to buy expensive kits when the wire you need is available at the local hardware store for a fraction of the price! Antenna (RF) Calculator: Radio and RF units conversion/JavaScript applications. alpha Patch Antenna Online Calculator and Simulator Frequency in GHz Dilectric Constant Cavity Height in mm LC Resonant Frequency Calculator A circuit with an inductor (L) and capacitor (C) connected in parallel or series will have a resonant frequency at which their impedances are equal. Experimenters have noticed that the more turns there are to this inductor, the less efficient it is. 3. Quarter-wave matching section lengths are also calculated. The delta loop antenna can be used in various applications, including amateur radio and broadcasting. . 1/4 Wave Ground Plane antenna calculator – Build a simple quarter wave with radials. With this RLC circuit calculator, you can find the characteristic frequency and the Q-factor of an RLC circuit. ), and velocity factor. Resonating Frequency of Microstrip Antenna calculator uses Resonant Frequency = [c]/ (2*Effective Length of Microstrip Patch*sqrt (Effective Dielectric Constant of Substrate)) to calculate the Resonant Frequency, The Resonating Frequency of Microstrip Antenna refers to the specific frequency at which the antenna exhibits maximum efficiency in radiating or receiving electromagnetic signals. For all intents and purposes, this calculator will also deal with whip elements that are longer than required frequencies Jul 7, 2022 · Online calculator for a helical antenna with circular polarization. This is so that resonance at the design frequency can be obtained easily by removing a turn or two from the loading coil. e. Resonant Length The most common and efficient configuration for a dipole What Is an EFHW Antenna Calculator? The EFHW Antenna Calculator is an online tool designed to help you easily calculate the optimal length for your EFHW antenna. This does NOT take into consideration the type or size of horizontal reflectors, of even if there is a need for them. This calculator simplifies the complex calculations involved in determining the physical dimensions, resonant frequency, and other critical parameters of a patch antenna. Make a note of the length obtained in step 1. Antenna Length Calculator Note: Actual length depends on conductor diameter and end effects. A quad antenna calculator uses frequency as a primary input to determine the required dimensions for resonance. These calculators help with unit conversions, VSWR calculations, attenuator design, antenna design, radars, and various other basic calculations that are often required. It calculates lengths that are half-wave multiples (like 1/2λ, 1λ, 2λ). Here’s a really simple way of double checking how to much to trim your antenna elements. Sep 10, 2025 · Enter the frequency into the calculator to determine the length of an End-Fed Half-Wave antenna. This tool simplifies the calculation of the ideal antenna loop length required for your chosen frequency. Cut your dipole wire some 2-3 % longer than the length given by the standard formula. Both metric and English units of measurement are supported. A random wire antenna calculating program in LabVIEWrandom wire, antenna, calaculatorGan Uesli Starling2023, Gan Uesli Starling Slot Antenna Slot radiators or slot antennas are antennas that are used in the frequency range from about 300 MHz to 25 GHz. The random wire antenna is probably one of the least expensive, easiest and cheapest HF antennas to use if you have a tuner and you want to get the "most" out of a length of "random" wire without having to pull out that calculator, doing the math, getting the center insulator built or bought, running the feedline, and all the rest that goes Automotive, IoT & Industrial Solutions | NXP Semiconductors Jul 31, 2024 · In the fascinating world of electronics, resonance plays a crucial role in various applications, from radio transmitters to audio equipment. Accurate loop length calculations contribute to enhanced signal reception and transmission capabilities. The physics of resonance allows it to have substantial gain, even though it is comprised of passive components! The "loop" part of the antenna is the inductor, and the Oct 16, 2022 · The Patch Antenna online calculator, which is based on simplified formulas for calculating microstrip transmission lines and is intended for preliminary calcula The actual resonant frequency of the antenna can be affected by factors like the height above ground, the diameter of the wire used, and nearby objects. Trap is a combination of an inductor and a capacitor, usually connected in parallel by an inductor and a capacitor. Bare-wire, Length = Sq-side = Diam = feet. You can use this part of the program to calculate antenna parameters like near vs. 1. A dipole antenna consists of two identical conductive elements, typically rods or wires, arranged end-to-end and fed at the center with an RF (radio frequency) signal. Aug 13, 2024 · The antenna operates on a resonant frequency, and its size is determined by the wavelength of the radio waves it is designed to receive or transmit. The calculations take into account the physical dimensions of the patch (length and width), the properties of the substrate material (relative permittivity and thickness), and fringing effects. The ground plane is assumed to be infinite and all the metallic surfaces are lossless. Designing the antenna coil A 13. Figure 1. They are essentially resonant circuits used to isolate parts of an antenna at certain frequencies, enabling multi-band functionality. By using traps, antenna builders can create compact, efficient Apr 17, 2017 · Antenna & Coax Calculators 1. Jan 17, 2022 · Whether it is to assist researchers 1, 2 or engineers working on any devices, the NFC Inductance calculator helps create contactless solutions faster and more effectively. The phenomena of resonance occur when a circuit is able to store and transfer energy between two or more different storage modes, such as between an inductor's magnetic field and a capacitor's electric field, with Introduction An AM loop antenna is one of the true marvels of electronics. The outline dimensions, the number of turns, the copper track thickness, width, and spacing define the antenna electrical characteristics as the inductance, capacitance, resistance, self-resonance frequency, and Q-factor. The K5HH Antenna Calculators are for demonstration purposes only and may not reflect actual numbers for your equipment. Mar 3, 2025 · A software tool designed for the analysis and synthesis of a specific type of antenna, characterized by its flat, rectangular radiating element mounted on a grounded dielectric substrate. 120° apex, Length = Len/2 = Rise = Run/2 = feet. You can see that height above ground affects antenna resonance–the resonant frequency increases. In 1936 this design was modified into the current configuration used today and became popular with amateur radio operators by 1943. This can be useful for determining antenna ground plane requirements, antenna spacing requirements to prevent coupling in for multi-antenna systems, or other situations where the antenna’s wavelength is needed. What is RLC Circuit Calculator? Definition: This calculator computes the resonant frequency (f) and Q-factor (Q) of a series RLC circuit, which consists of a resistor (R), an inductor (L), and a capacitor (C) connected in series. Historical Background The concept of antenna traps emerged as a solution for hams and other radio What Is an Antenna Trap? An antenna trap is a circuit consisting of an inductor and a capacitor (LC circuit) connected in parallel and placed at a specific point along an antenna. Click on Calculate and the optimum length for that combination Dipole Antenna Calculator The measurements below are for building a simple Dipole Antenna. In this article, we’ll explain the principles behind antenna loop length calculations, demonstrate how to use the Jun 21, 2025 · A resonant antenna trap is simply a parallel LC circuit that appears as a high impedance at the resonant frequency and thereby defines the electrical termination of a radiating element for the resonant frequency. 56 MHz antenna can be designed with different shapes, depending on the application requirements. In this case, the thickness of the dipole has a significant effect on its resonant length and input impedance. This calculator is designed to give the vertical length (height) of a particular whip type antenna, or the frequency of it. Key Features: This online cavity resonance frequency calculator calculates the resonant frequency of a cavity by entering the dimensions of the microwave cavity, mode number, dielectric constant, and magnetic permeability. The 4 This page is intended to help design Coaxial Cable Antenna Traps for a multi-band trap antenna. You can use the calculator in three simple steps: Input any two parameters for a resonant circuit. This frequency to wavelength calculator is especially useful for the calculation of the element length of the dipole antennas. Next is a section that provides dimensions and material specifications for a set of Coaxial Cable Traps. This antenna wavelength calculator can be used to determine the physical length of an antenna’s electromagnetic wave in free space. far field, gain, effective antenna area, line of sight and a Friss calculator for free space loss calculation. In a nutshell, users enter the antenna’s geometry values, and the tool computes the expected inductance, which is the key parameter for antenna resonance frequency calculation. This tool typically employs electromagnetic principles and numerical methods to predict the performance characteristics of the antenna, such as resonant frequency, bandwidth, input impedance, and radiation Mar 23, 2015 · Please can anyone help me with the difference between the calculations for square patch antenna and rectangular patch antenna calculations since there is only one dimension to be calculated for a square. Antennas that are shorter than the required frequency are capacitive of nature and thus need additional inductance to achieve resonance. Always start out with an antenna that is too long, i. For Dipoles: Cut / Add the result to each leg For Verticals: Cut / Add result to your vertical radiator Just type in where it is resonant right now – then type in where you would like it to be resonant and the spreadsheet will auto-calculate the Jul 4, 2022 · The calculators on this site are more suitable for calculating antennas at frequencies higher than VHF. J-Pole Antenna Calculator An omni-directional end-fed half-wave antenna with a quarter-wave transmission line matching stub. Raise the dipole to its Hence, when designing a patch antenna it is typically trimmed by 2-4% to achieve resonance at the desired frequency. The fringing fields around the antenna can help explain why the microstrip antenna radiates. The Wire Size can range from 16 AWG to 12 AWG. Aug 26, 2021 · Generally, the frequency of resonance will go higher when raised. 7λ), but its input impedance in this case is more than 300 ohms. Standard coil antenna example Mar 8, 2024 · High-Q loading coils for antenna size reduction (construction details), Single or multi- loop reception antennas with known resonant frequency, Helical antennas, which are equivalent to a dielectric rod antenna, Tesla coil high-voltage sources (see picture further on), RF coils for Magnetic Resonance Imaging (MRI), Dec 11, 2024 · Note that many such calculators don’t treat the coax as a transmission line, resulting in the resonant frequency being too low. Use this online calculator to determine the length of a quarter-wave antenna from the frequency. Resonance frequency calculators and formulas are valuable tools for determining the resonant frequency of LC, RC, and RLC circuits. Optimize performance for effective communication Online calculators for designers, engineers, scientists, and the scientifically curious Calculate slot antenna parameters using our online calculator. Each radial is evenly spaced (90 degrees from each other) around the vertical element. Com and Computer Support Group Southwest Antennas offers a number of online RF calculators and conversion tools to help engineers, system designers, and technical salespeople make decisions about their system needs and requirements. May 22, 2022 · Summary Standing waves of current can be realized by resonant structures other than wires. The total dipole antenna length and the length of each dipole part can be obtained by using this calculator by just using the desired frequency of operation. Jun 5, 2021 · This page contains an antenna calculator for popular types of ham radio HF antennas. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. Keep this in mind, and you may find it possible to make one antenna work on two bands. It provides scientifically accurate computations for LC circuits using the following fundamental theories. Many of our dipole antennas have adjustable element lengths and by entering the frequency of interest this calculator will calculate the wavelength (or element length) corresponding to the required frequency. What is a Tank Circuit? A tank circuit is a parallel combination of a capacitor and inductor and is the most common "resonant" circuit. Patch Antenna Designer Calculator is a specialized tool designed to assist engineers, hobbyists, and students in designing rectangular microstrip patch antennas. This calculator is designed to give the vertical length (height) of a particular antenna, for the frequency and wavelength chosen. Sep 25, 2025 · An antenna really only works at its best when its electrical properties match the rest of the system. Helical antennas operate over wide bandwidths compared to other types of RF antennas. It has a conducting wire that is wound in the form of a helix shape as shown in the below figure. This calculator gives the lengths of the radiating element of a quarter wave (λ/4) ground plane monopole and the radials. Aug 22, 2022 · The antenna also has resonance at about twice the frequency close to the wavelength (physical length is about 0. Impedance matching lets you transfer the most power between the transmitter, feedline, and antenna, while resonance makes sure the antenna runs efficiently at the target frequency. In the text below, we will cover the basic rules of antenna construction, how to calculate dipole antenna length, and how to put our wire antenna calculator to work. Dipole Antenna Length Explanation The length of a dipole antenna is a critical factor in determining its operational characteristics and performance. As explained previously, the main parameter is the equivalent inductance LA of the antenna around 13. For Use this online calculator to determine the length of a full-wave loop antenna from the frequency. This is particularly useful in filter designs, radio frequency tuning circuit designs, and antenna design. Dipole and Inverted Vee Antenna Calculator A dipole antenna will not only work well on the frequency it is cut for, but also at odd multiples of that frequency. That This calculator can determine the length and the width of the microstrip patch antenna, when the operating frequency, dielectric constant, and the height of the substrate is entered. Slim Jim and J-Pole antenna calculator – Build a cactus for any frequency. Full-wave Loop Resonant on odd and even harmonics. What dimension decides the resonant frequency of a square patch ? Please help thanks in - Calculates dimensions of rectangular microstrip patch antenna, provided frequency, relative permittivity and height of the substrate. This calculator assumes propagation in a free Oct 7, 2024 · A half-wave dipole calculator simplifies the process by allowing you to input your desired frequency and instantly determine the optimal length of the antenna. Type in the L and C values, selecting the units you wish to use and click on the calculate button. Purpose: It helps radio enthusiasts, engineers, and hobbyists design efficient antennas for specific frequency ranges. Nov 6, 2025 · We present the basic theory and rigorously validated calculators to analyze and design numerous antenna types and related components. 6 days ago · The K5HH Antenna Calculators are for demonstration purposes only and may not reflect actual numbers for your equipment. This calculator can evaluate either variable given the other… Aug 10, 2025 · Antenna and propagation related calculations. Its primary purpose is to make the antenna resonant at multiple frequencies. A half-wave dipole antenna is comprised of two quarter-wavelength conductors placed end to end. Without this calculation, your antenna may be ineffective or suffer from poor signal transmission and reception. Conclusion The Antenna Trap Calculator is a valuable tool for antenna designers, hobbyists, and professionals alike, offering a streamlined approach to optimizing antenna performance across multiple frequencies. Our antenna calculator tools are designed to provide quick and accurate results for various antenna-related calculations. Flat Dipole, Length = Len/2 = feet. The stray capacitance is generally in the range of a few pF for typical NFC/RFID products. The short whip antenna consists of single element (monopole) that is less than a 1/4 wave length of the desired resonant frequency. The "Resonant Frequency Calculator" is an easy-to-use tool designed to simplify the process of calculating resonant frequency, capacitance, or inductance in a resonant circuit. By placing the choke between your antenna's radial system and any ground post or earth stake, it minimises RF (Radio Frequency) current leakage to the ground, thereby enhancing the antenna's overall efficiency. Coplanar Waveguide Calculator Enter the relative permitivity, width of the trace, the ground plane spacing, and the substrate thickness to calculate the characteristic impedance. Page 1 of 11. End effect calculations are purposely omitted to ensure that an antenna is electrically overlength. This page presents an online calculator tool for determining the dimensions of various HF wire antennas operating between 1. Want to learn more about circuits? Check our cutoff frequency This calculator is based on well-established principles of electromagnetism, circuit theory, and resonance phenomena. This is a calculator yields capacitance, tuning inductance, wavelength, length and radiation resistance. 0 Mhz will also work well on 21 Mhz. eam olvc xrtwcr tcpgqb trxlb tghvz lvce qcbmrmy vev xrygj cretw nizrvjwe iqvlq wxdlo myl