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Enter the desired frequency and select the desired calculation from the drop box. Horn Antenna Calculator is a software tool for the simulation of the radiation pattern of horn antennas. This fast and reliable software allows obtaining the radiation characteristics of a variety of horn antennas, including: pyramidal, conical, corrugated, diagonal, and dual-mode (Potter) topologies. Se hela listan på w8ji.com Ham Radio: How efficient is your ground-mounted vertical? http://www.sciencewriter.net Antenna Gain Calculator is a free online tool that displays the antenna gain for the given wavelength, efficiency and the physical aperture area. BYJU’S online antenna gain calculator tool performs the calculation faster, and it displays the antenna gain in a fraction of seconds.

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Jack explains how to use an antenna analyzer and EZNEC to calculate the efficiency of a mobile antenna. The basic premise is to compare the measured input impedance of your mobile antenna, compare it to the modeled impedance given by EZNEC, and then adjusting the coil Q (resistive loss) until the two impedances (measured and calculated) equal. Measure the antenna length and calculate the antenna capacitance . z. Using 3.75 pf/ft for base loading, 1.9 pf/ft for center loading. Calculate the inductance needed for resonating the antenna.

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This page of converters and calculators section covers Antenna Gain calculator . The gain of parabolic antenna type is calculated by antenna gain calculator. Antenna gain calculator example: Antenna efficiency = 0.7.

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With efficiency taken into account, G = 0.55(52525) = 28888, or in log form: 10 log G = 44.6 dB Approximating the antenna pattern as a rectangular area: a = r sin 2 , b = r sin N, area = ab = r 2 sin 2 sin N Q occurs until l' is almost equal to R, that is, the field poin t is almost at the antenna surface. When r=R, the Q of the antenna is close to the Qn of the highest order wave prcsent. When {3R > N, all Qn are of the order of unity or less, and the quality factor is Q<.5. 1 (31) In this case the antenna is potentially broad band.
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Frequency in MHz: Length of the vertical element:--You can shorten your vertical antenna by using a loading coil. Determining Efficiency Measure the 2:1 SWR bandwidth of your antenna. z.
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This calculator is designed to give the vertical length (height) of a particular antenna, for the frequency and wavelength chosen. This does NOT take into consideration the type or size of horizontal reflectors, of even if there is a need for them.