G (num) - Normalized Gain. 8 in) = 62. As an RF signal propagates away from a transmitter the power density reduces conserving the power in the EM wave. What’s New. The resonant frequency of an LC Circuit is the frequency at which the inductive reactance and capacitive reactance of the LC circuit are equal. Say the speed of sound in glass is 4540 ext { m/s} 4540 m/s, and the wavelength is 20. Watt To dBm Calculator. 5 Hz This wavelength to frequency calculator helps determine the frequency of a waveform based on its wavelength. Here is a list of some of the calculators in this app: Attenuator Calculators. 1 quarter wavelength is the shortest antenna length that will radiate signal. The maximum and minimum frequencies are therefore 100. 2 ext { m/s} by default, the speed of sound, but feel free to enter a. Following equations are behind the calculations. For example, a radar system sends out a pulsed radio wave at the carrier frequency from the transmitter, waits for returning echoes. Choose the velocity of the wave. This blog post provides the formulas and an Excel spreadsheet for calculating the wavelengths for each 20 MHz channel center frequency in the 2. Waveguide Calculator (Rectangular) 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. Waveguides are transmission lines made from hollow tubes and commonly comes in rectangular or circular form. Cutoff Frequency Calculator. Even a ¼ wavelength antenna at kHz frequencies is impractical at around 10,000 ft long. 335 X 18 = 492 - There is where 492 comes from. The corresponding wavelength is called the EMI shield wavelength. 7/8 λ. This online resonant frequency calculator is divided in to three calculators. Things to notice: try frequencies 149. RF wavelength calculations can be made quite simple with two basic formulas. The ITU Radio Frequency to Wavelength conversion tool allows you to enter a frequency from 8. Guide wavelength is defined as the distance between two equal phase planes along the waveguide. This calculator clears up that confusion to make the conversion between wavelength and frequency easy. Everything RF has a page dedicated to calculators for RF applications. Characteristic Impedance. This calculator utilises the diameter of the reflector and the operating frequency to calculate critical antenna characteristics such as gain, HPBW, and. To fully understand the results obtained by this calculator, please take a few minutes to read the. The lower cutoff frequency (or wavelength) for a particular mode in rectangular waveguide is determined by the following equations (note that the length, x, has no bearing on the cutoff frequency): Rectangular Waveguide TE m,n Mode. MIT Lincoln Laboratory. 854187817620. This calculator is designed to calculate the wavelength of any frequency signal. 125⋋. Feel free to use the tool below and let us know if you have any questions or. Find the wavelength of a radio wave with a frequency of 101. Using the formula:The relationship between wavelength and frequency of an RF signal is the speed of light. The free space path loss is the loss in signal strength of a signal as it travels through free space. Impedance Return Path for RF / Micro-wave signals, they WILL find a Path. As the name suggests, the length of this transmission line if fixed at a quarter of the wavelength (λ/4). Wavelength Calculator (TEM) Calculate a wavelength in the presence of a dielectric. 2GHz]Signal’s power level lower than 1 mW has negative dBm values, and the signals stronger than 1 mW have positive dBm values. 4 GHz. User assumes all risks for its use. Dipole antenna calculatorFm 23-10 chptr 7 communications 5/8 wave 2kw vertical high gain fm broadcasting antennaAntenna length wavelength. The lower cutoff frequency (or wavelength) for a particular mode in rectangular waveguide is determined by the following equations (note that the length, x, has no bearing on the cutoff frequency): Rectangular Waveguide TE m,n Mode. A microstrip is a type of transmission line in which a strip of a conducting material like copper is mounted on a dielectric material and routed to a ground plane. : 2. 5 mils (241 microns). Marki Microwave's Tools is a collection of free online applications for RF analysis and synthesis that are easy to use and mobile-friendly. MHz. where: E is the energy of the photon. The Velocity Factor (VF) of my 300 ohm twinlead is 0. Np = Number of turns in the primary coil. 42) Thin Film Resistor Calculator (Trim and non Trim) 43) Opamp Calculator 44) Lumped Balun Calculator 45) Wavelength calculator 46) L-Network Matching Calculator 47) LCR Parallel - Series Conversion. While a solid plane of material is best, cages made from mesh are common. The link budget is an important value that enables engineers to design systems based on the required sensitivity of a receiver at a. ) or Hertz (Hz) These units may be inconvenient when dealing with radio frequencies. 4mm. com for all of your RF connector and RF cable assembly needs. Believe it or not, conductors can become thinner at higher frequencies with little impact on circuit loss, because the skin depth shrinks with frequency. Wavelength. The band is sometimes subdivided into VHF-Lo (RF 2 - 6), and VHF-Hi (RF 7 - 13). . microwave ovens work at a wavelength of about 10 cm. This calculator helps you calculate the characteristic impedance of a coaxial cable given its dimensions. Wire over Ground Calculator. A larger RCS indicates that an object is more easily detected. It assumes that the wave is traveling at the speed of light which is the case for most wireless signals. Since the area of the sphere of radius (r). To calculate the antenna length, this formula comes in handy: L = frac {142. Zp= Input/Primary impedance. To get a better understanding of wavelength size and frequency, this frequency and wavelength calculator is helpful. 95. There are many propagation modes in a circular waveguide, the main mode is TE11 mode, and its single-mode operating area is 2. Following calculator calculates lowest cutoff frequency of rectangular waveguide as per TE10 mode and equation-2 that is Fc = c/2a , where 'c' is speed of light and 'a' is large dimension of waveguide. Is all that stitching shown in figure really necessary from an RF point of view? Probably not. If you want to calculate. Understanding Frequency and Wavelength. Due to the three-dimensional propagation of radar waves, frequency hold the highest weight in determining range. Use is pretty straight forward. MHz. You may use the formula: Wavelength = c/f, where: c - The speed of light equal to 299,792,458 m/s; and; f - The frequency of the antenna. The unit of radio frequency is Hertz (Hz) i. Home › EIA WR 284 Calculator. With our handy calculator, you can choose from 50 Ohm, 75 Ohm, 93 Ohm and 95 Ohm coaxial cables. It's easy! Just use our wavelength calculator in the following way: Determine the frequency of the wave. f = v/lambda f = v/λ. 10 -3. The FCC limit for public exposure from cellular telephones is an SAR level of 1. PCB trace length matching is crucial for high frequency synchronous signals. Apr 15, 2023. GHz. 492 comes from multipling the frequency by the distance of a 1/2 wavelength. LTE is the upgrade to both GSM/UMTS networks and CDMA2000 networks. Noise Temperature to Noise Figure Converter. Wavelength calculator 46) L-Network Matching Calculator 47) LCR Parallel - Series Conversion Calculator 48) PI. However, this can be automatically. **Note: All of our. The width of the conducting layer is important to calculate the radiation intensity since it directly affects. 3. According to WatElectronics "Wireless Radio frequency is any of the electromagnetic wave frequencies around 3 kHz-300 GHz". 6 mm. A quarter wave transformer is used to match two transmission lines with different impedances. 01 and 99. × 10 −12 F/m is the. A microstrip width calculator can calculate the width of a microstrip. 16 RF / Microwave Design - Basics)Signal Wavelength - *Wavelength (λ) of a Signal is the Distance it Travels in the Time of One Cycle. . 1: Impedance-matching using a quarter-wavelength transmission line. RF EMR lies in the frequency range between 100 kilohertz (kHz) to 300 gigahertz (GHz). The Pasternack wavelength calculator Transverse Electromagnetic Mode (TEM) allows you to determine the wavelength (in millimeters) inside a rectangular waveguide. 96 m 5. The Wavelength from Frequency calculator computes the wavelength (λ) based on the RF frequency (ν) and the speed of light (c). NEW Version V2323, released on 31 May 2023, FREE DOWNLOAD, WinRFCalc is the best Windows RF calculator toolbox for EMC, RF and Radio engineers. 2. Enter F and F (GHz) Metric (millimeters) English (inches) Advertisement. 1-866-PASTERNACK (1-866-727-8376) US and Canada only • +1-949-261-1920 International • Email sales@pasternack. Take the square root of the value from step 2. 65c/frequency = 0. Radiated Magnetic Field from a Loop Antenna (Low Frequency, Close Proximity). You can choose a wave velocity from the preset list, so you don't have to remember. Is the Doppler effect sound affected by wavelength? The doppler shift induces a wavelength shift at the wave's origin (the source frequency remains constant) Only the wavelength changes for the travelling observer (in the source), whereas both frequency and wavelength change for the stationary observer (experiencing the doppler. 74mm. The cutoff frequency is the frequency up to which the system functions efficiently. 8, we should expect it to actually resonate at around 115. RF reflection becomes a concern when the trace or conductor’s length is equal to or larger than 1/4 of the signal’s wavelength. The Friis transmission equation gives the power received by an antenna from another antenna that is transmitting a known amount of power at a distance under ideal conditions. 6 W/kg). Depending on the operating frequencies and power levels, the dimension of the aperture should be smaller than 50and not greater. Input both parameters in the resonant frequency formula: f = 1 / (2π × √ (L × C)). This calculator calculates the maximum range of a radar based on the power transmitted, system gain and receiver sensitivity. Doppler effect is widely used in medicine – it allows us to measure the blood flow in arteries and veins, perform ultrasound, and it also has a great purpose when dealing with how to calculate cardiac output with echocardiography doppler. Height: Height of the substrate. where c is the speed of light, f the frequency and λ the wavelength. It is a good starting point. Example: Calculate the effective antenna aperture of the Russian RT-70 radio telescope in Crimea (Russia): its antenna gain is 69. There are usually four radials, three being a minimum, but you could use up to six. RF calculations and RF conversions include metric. Therefore, solving for the following equation for a round aperture will, of course, yield different results. Pasternack's RF Calculators and Conversions section provides engineers valuable and easy-to-use tools ranging from complex mathematical formulas to simple conversions. Frequency to Wavelength Calculator. Stack Exchange Network. Gain. Select whether a Velocity Factor applies. For example, f = 10 MHz. The Frequency from Wavelength calculator computes the RF frequency (ν) based on the wavelength (λ) and the speed of light (c). This everything RF calculator calculates the various parameters related to the design of a Whip Antenna. Microwaves are part of the electromagnetic spectrum and part of the RF range. k=frac {2pi} {lambda}=frac {2pi f} {v} k = λ2π. Depending on the operating frequencies and power levels, the dimension of the aperture should be smaller than 50and not greater. - Bridged Tee Attenuator Calculator. Hz kHz MHz GHz. Following calculator calcultes RF frequency in MHz for the entered wavelength in meters. At the receptor, I'm using coil loaded antenna with 1/4 of wavelength, the same of the picture, tomorrow I will try a straight rigid wire of 1/2 of wavelength. dBm To Watt Calculator. RF wavelength calculations can be made quite simple with two basic formulas. Following formula/equations are used in the Whip. Bookmark or "Favorite" this page by pressing CTRL + D. Here's the equation for guide wavelength: Guide wavelength is used when you design distributed structures in waveguide. The formula used in the Far-Field Calculator is: d F = λ 2 ⋅ D 2 Example. Design, development and small scale manufacture of simple RF and Audio items. The substrate parameters (ε r and h) and the frequency of interest are required. λ - Wavelength. Operating Frequency. To calculate the skin effect (or skin depth), follow the given instructions: Multiply the frequency of the signal with the relative permeability of the conductor, the permeability of free space, and π. When in doubt, use 1 for copper, . This calculator computes quarter-wave, half-wave, 3/4-wavelength and full-wave dimensions of the coaxial cable segment knowing inner insulation material. Items (3), (4), and (5) above represent RF or power losses which can be measured. Then, apply the formula: λ = v/f. This impedance is used to calculate the depth ( D) into the patch antenna. A microstrip width calculator can calculate the width of a microstrip. 2 \text { m/s} by default, the speed of sound, but feel free to enter a. )For a Signal Traveling in Free Space - *λ = c (Speed of Light) / f (frequency). Divide the resistivity of the conductor by the value obtained in step 1. Here is a list of some of the calculators in this app: Attenuator Calculators - Pi Attenuator Calculator - Tee Attenuator Calculator - Balanced Attenuator Calculator -. Methods of RF Field Calculation used in MRI with Consideration of the Sample. Resonant Frequency Calculator. The design approach is determined by whether the RF source is inside or outside the shield, how much attenuation is needed, i. This calculator determines the effective aperture A e for a given frequency f or wavelength, λ and antenna gain G. Frequency wavelength in millimeters: Download various frequency allocation charts. Using the formula: The relationship between wavelength and frequency of an RF signal is the speed of light. 14. 85419 x 10. 75, Radiation Resistance = 347. v v = wave velocity; and. Radio Frequency Power Conversion Calculator . Remember to be consistent with the units!Elements must be spaced properly in order to avoid grating lobes. 05 m, multiply by 39 and you have 80 inches. This online plane wave calculator calculates the phase velocity Vp (m/s), wavelength λ (meter (s)), and wave impedance (Ω) of the plane wave by entering the value of relative permittivity (εr), relative permeability (μr) of the medium, and frequency (MHz/GHz). Antenna Impedance (Z (Antenna)) Ohms. where: λ – Wavelength; v – Propagation speed of the wave; and. The Wavelength Calculator provides a general purpose utility for determining the Free Space Wavelength, Characteristic Impedance, and Velocity of Light for a plane wave at a user defined frequency ( f) in a Region that is Uniformly Filled with a dielectric material that is also defined by the user by entering the Relative Permittivity and. Choose a calculation to use the wavelength equation λ = v/f to solve for wavelength λ, velocity v or frequency f. Verify the result with our sound wavelength calculator. . 020 - Updated: 2023 - mwave. 300 MHz has a wavelength of 20. Coaxial Cable Impedance Calculator. a) Find the shortest wavelength AM radio signal. 13mm (depends on manufacturer's specs) and you get a trace width of ~0. How much gain does a 1/4 wave antenna have?Now we will solve the same problem using our free space path loss calculator: Input the distance between the transmitter and receiver antennas (35,863 km). Let us first define what a Radar Simulation range is. These files are fairly large, some over 1 meg. The TE 10 mode of propagation is the lowest mode that is supported. AM radio stations have frequencies from 540-1700 kHz. 979 meters. 13,573. Power in excess of 200 watts can develop very high RF voltages. one conversion factor into the other by calculating 1 divided by the conversion factor. Please visit RFconnector. 15 for the 40 meter band). The length of RF waves impacts antenna design decisions. r is the contribution from the RF components between the antenna and the receiver – Temperature of RF components • L r is the loss of input RF components. The circular waveguide supports both TE (transverse electric) and TM (transverse magnetic) modes. To calculate the wavelength of a periodic oscillating motion, given the frequency, you first need to know the speed of the wave. Where:A waveguide is a hollow metallic structure used to transfer high-frequency electromagnetic waves (usually in the microwave range) from one place to another. An antinode is a point on a standing wave of maximum amplitude. Er. I expect it will require a transmit signal attenuation of about 40 dB, to hide a card. Ns = Number of turns in Secondary coil. For example, if you are making a PIN diode switch with two shunt diodes spaces 3/4. 2GHz and calculate the Wavelength. f. 3 = 230. ppt ODonnell 06-13-02 (Equivalent) Antenna. 65wavelength(in air) If you want more accuracy than that approximate 0. Get the free "Frequency Calculator" widget for your website, blog, Wordpress, Blogger, or iGoogle. At 870 MHz, λ is 345 mm; The rule of thumb for hole dimension is λ / 20 = 17 mm. If you want a thinner microstrip, you need to reduce the substrate height using one of the following solutions: Use a thinner 2-layer PCB, for example 0. offices email call. where. 4 Link Loss and Path Loss. Height: Height of the substrate. To use the RF Exposure Calculator fill-in the form below with your operating power antenna gain and the operating frequency. The Antenna CalculatorforHalf-Wave Dipoles. If you have no particular preference within a given ham radio band, then simply enter its center frequency (i. Based on the below fig, the formula for calculating the radius of each Fresnel Zone (1,2,3,. ε = dielectric constant = ε0 * εr. This general RF calculator includes calculations of path loss, VSWR and wavelength as well as conversions between many common terms used in the wireless industry. computed by Eq. These include: Conversion: dBm To Watt Calculator | Frequency to Wavelength | Noise Figure to Noise Temperature Calculator | Noise Temperature to Noise Figure Converter | Watt To dBm Calculator | Wavelength to Frequency. Frequency ‹―› Wavelength Calculator. 7 mA Line of 230 meter 580 meter Sight Range Sensitivity -94 dBm -93. The wavelength is the distance between repeating units of a wave pattern. Put the values in the equation: f = 3 × 10 8 m / s 4. All About Circuits is the largest online electrical engineering communities in the world with over 700K engineers, who collaborate every day to innovate, design, and create. Attachments. Download: RF & Microwave Toolbox lite APK (App) - RF ＆ Microwave Toolbox lite APK - Latest Version: 4. The pulse repetition frequency (PRF) is the measure of the number of pulses per second of a repeating signal. Image formation in a lens takes place by the refraction of light at its two bounding surfaces. Equation $$lambda = frac{c}{f sqrt{epsilon_{R}}}$$ or $$lambda = v_{p}frac{c}{f}$$ Where: $$lambda$$ = signal. 77 gigahertz and 17. Thus, for a Faraday cage to prevent this noise. Wye/Star to Delta Conversion Calculator. However. This can be set to zero, but the calculated loss will not include conductor losses. RF Calculators. μr (relative permeability)Quarter Wave Transformer Impedance Calculator. The cut-off frequency of the coaxial cable represents the maximum upper operating frequency of the cable. dB. Design a transmission line segment that matches 300 Ω to 50 Ω at 10 GHz using a quarter-wave match. Our RF calculators and converters will provide the figures you need for your radio frequency engineering needs. Often, power consumption and range must be balanced for maximum usability. - Tee Attenuator Calculator. Wilkinson Power Divider Calculator. 35 meters. Independent of wavelength – A very strong function of R – A linear function of everything else. Skin Depth Calculator. 55 for most antennas); D — dish diameter; λ — wavelength; Φ — wave arrival angle;Microstrip Impedance Calculator. Suppose we shine a monochromatic beam with wavelength λ lambda λ perpendicular to a diffraction grating with spacing d d d. C or Velocity of Light = Speed of Light (299,792,458 m/s) Frequency (Hz): The frequency in Hz. Do all your RF calculations using this application. The tool provides two networks that will have the desired impedence at that frequency, but their. c = Speed of Light (299,792,458 m/s) f = Frequency. Write down the inductance L in henries. Where, D = Antenna dimensions (Can be the length or diameter of the antenna) f = Signal Frequency. This relationship, however, doesn't hold for real-world situations. 25 mm/h for very light rain to over 50 mm/h for extreme rains. The antenna factor describes the connection between the electric field intensity E around the antenna and the antenna's voltage output V. a = outside radius of inner conductor (inches) b = inside radius of outer conductor (inches) c = speed of light in a vacuum = 299,792 km/s = 186,282 mi/s. 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. = v2πf. calculators. Power (Input) = 1 Watt Power (Output) = 30 dBm RF Calculator for Frequency calculation Following calculator calcultes RF frequency in MHz for the entered wavelength in. , n) is: Where, R = Radius of the Fresnel Zone in m/ft. $\begingroup$ Its got nothing to do with whether the cage is grounded. A microstrip is a type of transmission line in which a strip of a conducting material like copper is mounted on a dielectric material and routed to a ground plane. Note: If you select a waveguide size from the dropdown below, the broad wall width will be automatically calculated. However, if the observer is away from the. Convert wavelength to frequency using this online Elite RF calculator. Air is thin enough that in the Earth's atmosphere radio waves travel very close to the speed of light. The change in period between these two frequencies is 2 ps (that is, 1/99. The "Standard Definitions of Terms for. 31. The R f value is a physical constant for organic molecules. As you’re probably aware, signals travel on PCB traces with a certain speed. When the dimension of an opening in an EMI shield is equal to one-half the wavelength of interference, then the shield radiates EMI and becomes useless. Wave Characteristics . 4GHz antenna you would want them to be separated by at least (more is better,. Relative Dielectric Constant (έr) This is a required field. In some cases, users require a custom impedance value. 99MHz - 1/100. The Antenna CalculatorforHalf-Wave Dipoles. Wavelength Calculator. Wavelength and frequency calculator; Intermodulation calculators. Following table provides links to useful Wireless converters and calculators. λ is the wavelength. The following table provides conversions for wavelength (from frequency), VSWR (from forward and reflected power) and various other useful conversions. I leave it to other sources to provide the complex equations needed to precisely model coaxial cables. The calculation assumes there are no obstructions (trees, buildings, etc. This page convert and calculate wavelength. 3. For such an antenna, the near field is the region within a radius r ≪ λ, while the. Also here is a second formula for calculating a half wavelenght in inches. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. Enter the Frequency to be converted. PPM to Hz Calculator. This is a true unbalanced antenna, with a feed impedance of around 50Ω and therefore a great. EXAMPLE of Whip Antenna Calculator: INPUTS : Frequency = 900 MHz, Length = 12 inches, Diameter = 0. © All Rights Reserved. 95 = 33 cm (which is what the computation gives us) The actual formula for length (L) in feet of the half wave dipole is: L = 492 / f. The frequency and the wavelength are intimately related, so the operating frequency has just as much to do with the via spacing as the wavelength does. 37) compared to the amplitude at the surface is called the "skin depth". The spacing ( S) is determined. This calculator calculates the maximum range of a radar based on the power transmitted, system gain and receiver sensitivity. There are many other factors that will come in to play when doing this in the real world. Frequency (ν): The calculator returns the frequency in hertz. e. This calculator computes the trace width of a microstrip given the following information: maximum current, trace thickness, temperature rise, ambient temperature, and length. If you want to calculate the Frequency from Wavelength - Click here to use the Wavelength to Frequency Calculator. e. This page convert and calculate wavelength. Suppose your network was a short circuit, the left "corner" of the Smith Chart. Band name Abbreviation ITU band Frequency and wavelength Example uses; Tremendously low frequency: TLF < 3 Hz > 100,000 km: Natural and man-made electromagnetic noise length = wavelength(in cable) * (phase shift in degrees/360), where the wavelength(in cable) = 0. Free Space Wavelength. The calculator below provides an inset feedline distance for a given antenna impedance and feedline impedance. Calculate. Canadian Radio Frequency Allocations. In the absence of obstacles and without atmospheric attenuation the total power passing through the surface of a sphere centered on a transmitter is equal to the power transmitted. Waveguide Calculators. Double-ridge waveguides are rectangular. Get the wavelength calculator available online only. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. 25*0. The wavelength is the distance between repeating units of a wave pattern. Frequency bands and custom frequency channels can also be selected. RF reflection results in attenuation and interference. Wavelength refers to the distance completed by one full cycle of the electromagnetic wave, while frequency is the number of times the electromagnetic waves pass a given point in one second. The frequency is expressed in Hertz (Hz). When in doubt, use 1 for copper, . Enter your desired frequency (MHz) of operation (i. Wavelength to Frequency Calculator. A few basic facts about waveguide: Here are Waveguide Equations & Fields. An alternative formula is:Radiofrequency (RF) electromagnetic radiation (EMR) is the transfer of energy by radio waves. Frequency wavelength in millimeters: Download various frequency allocation charts. where. Equation $$\lambda = \frac{c}{f \sqrt{\epsilon_{R}}}$$ or $$\lambda = v_{p}\frac{c}{f}$$ Where: $$\lambda$$ = signal wavelength The reason it’s not exactly half wavelength (35 cm in this case) is because of the end effect* and a resulting multiplication by 0. Yes, you can calculate the wavelength of a dipole. There are some advantages to using a microstrip transmission line over other alternatives. Waveguides are. It is defined as the depth at which the intensity of the radiation inside the material falls to 1/ e (about 37%) of its original value at (or more properly, just beneath) the surface. m. This is a required field. : 3. Large selection of online interactive calculators for RF design, including attenuators, capacitance, resonance, RF traps, and microstrip impedance. 99 MHz, respectively. 15 for the 40 meter band). Wavelength Calculator (TEM) Calculate a wavelength in the presence of a dielectric. One wavelength equals the speed of light divided by the frequency. What is amplitude in maths?Link Budget is a way of quantifying a communication link's performance while accounting for the system's power, gains, and losses for both the transmitter (Tx) and receiver (Rx). I calculate one wavelength of that twinlead on 20m as VF*c/f = 0. 3. Version 2. Though the calculation is done using the RF calculators. Take an antenna for a low frequency in the kHz range. Then, multiply the values of L and l by 0. 3GHz), Output Doppler Frequency (Hz) = 20000 i. com. The beamwidth will vary given a number of different factors such as the antenna type, design, orientation and radio frequency. An online calculator can be found here. 01MHz). Return Loss to VSWR. The calculator uses well known closed form equations to determine impedance and loss of a given circuit model. The frequency is equal to the speed of light in a vacuum divided by the wavelength.