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5 cze 2021 · The most widely used formula to calculate the approximate overall length of wire required for a dipole is: 468 / frequency (MHz) = length of wire in feet. The antenna calculator above uses this formula as a starting point to calculate wire lengths for the dipole.
Ham Radio HF/VHF Antenna Lengths Chart. Here is a handy chart for determing 1/4 wave verticals, 1/2 wave dipoles, and full wave loop lengths. All antenna lengths in the information below are in feet and are the results based on the standard formula of 468 / FMhz = total length in feet.
Antenna Calculator. Dipole and Inverted Vee Antenna Calculator. Sufficiently accurate for wire antennas up to 30 Mhz. The basic formula for determining the wire length of a center fed, 1/2 wave wire dipole or inverted Vee antenna (30 mhz or less) is 468/freq-in-Mhz for feet and inches or 143/freq-in-Mhz for meters .
The ham radio dipole is called a half-wave antenna because its length corresponds to an electrical half wave at the frequency for which it is intended. This Page Covers. 1. Antenna System. 2. Dipole Formula. 3. Resonant Length. 4. Transmission Line. 5. Dipole Hardware.
Funny you ask.........The formula for matching 75 ohm coax to 50 ohm coax goes like this: Quarter-wave matching section length in feet = 246 * cable's velocity factor / frequency in MHZ.
Dipole Antenna Calculator. The measurements below are for building a simple Dipole Antenna. The Wire Size can range from 16 AWG to 12 AWG. The larger the wire, the wider the bandwidth. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun.
Antenna (RF) Calculator: Radio and RF units conversion/JavaScript applications.
