# Wire Antenna Calculator. The following program will calculate the lengths needed to construct several popular wire antennas. All you need to do is enter the desired resonant (center) frequency in the form below, then click "Calculate". The correct lengths for the various models will be displayed in the chart.

The Antenna Near Field & Far Field Distance Calculator will calculate the distance of the three main EM (electromagnetic) fields which surround an antenna,

Next, determine the physical aperture area. Measure the total aperture area. Finally, calculate the antenna gain. This calculator determines the effective aperture Ae for a given frequency f or wavelength, λ and antenna gain G. Example: Calculate the effective antenna aperture of the Russian RT-70 radio telescope in Crimea (Russia): its antenna gain is 69.5 dBi or 9000000, working frequency 5.0 GHz (or wavelength 6 … Jack explains how to use an antenna analyzer and EZNEC to calculate the efficiency of a mobile antenna.

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The value of 'h' lice between 0.55 to 0.73. Here is the Antenna Aperture formula which helps you to calculate the antenna aperture efficiency on your own. Antenna Aperture Efficiency formula needs values of Electric Current Density, Electric Current Density for 1st element, Wave Length, Radius of Circular Aperture, Distance of the observation point from the Origin, Coordinate Angle 1 and Coordinate Angle 2. The antenna gain shown in top line of the results is the on-axis gain. The results are increasingly approximate beyond the -3 dB contour. The first null may appear at an angle off the boresight similar to the -3 dB full beamwidth. Default values: Maximum main beam gain calculation assumes an efficiency … Calculation of antenna efficiency.

## Antenna Efficiency calculator Example: INPUTS: Antenna diameter = 2.4 meter, Antenna Gain (dBi) = 43, Antenna frequency = 6000 MHz OUTPUT: Antenna efficiency = 87.75 % Antenna Efficiency Calculator equations or formula. Antenna Gain equation can be expressed as follows. From this equation, antenna efficiency can be calculated using above calculator.

In antenna theory, antenna efficiency is most often used to mean radiation efficiency. In the context of antennas, one often just speaks of "efficiency." It is a measure of the electrical efficiency with which a radio antenna converts the radio-frequency power accepted at its terminals into radiated power.

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The results are conveniently displayed in inches, centimeters, feet and meters. This formula to obtain the length of a half-wave dipole antenna will give a good ballpark value to start with. Design your own tuning capacitor for use with this antenna with the Capacitance Calculator (Capacitor Design) To use the calculator: 1. Choose the units of measurement, English or metric. 2.

This is typically the case for all antennas used by amateurs on LF (137 kHz) and MF (475 kHz). Formulas are taken from this excellent page by ON7YD. Pasternack's Microstrip Patch Antenna Calculator determines the length and width (in millimeters) of a rectangular patch antenna.

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A quarter-wavelength antenna is easy and inexpensive to build and can be an effective antenna with a low angle of radiation half" of the antenna--the conductive ground plane beneath it--makes a big difference in both the efficiency and feedpoint impedance of the antenna.

Performing a volumetric efficiency test can reveal the accuracy of a vehicle's Mass Airflow Sensor (MAF) as well as potential issues with the engine and can be
Effective radiated power is the term that describes station output, including the transmitter, antenna and everything in between. It considers transmitter power and
Efficiency Antenna Gain Calculator Calculates antenna gain from field strength, power to antenna, and distance. To use this online calculator for Power Density
Carries power to antenna. 0.

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### This dipole antenna calculator determines the size of a simple dipole antenna for a given frequency and the dipole wire diameter. It also determines the wavelength and the length adjustment factor k.Note that antennas are very rarely constructed according to the calculated theoretical dimensions and are always tuned to the lowest standing wave ratio (SWR) and the highest electric field strength.

It is denoted by 'D'.