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A coaxial collinear array for VHF/UHF
A coaxial collinear array for VHF/UHF
post 23 Apr 2024
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A coaxial collinear antenna for 70 CM
The guiding principle is that we have multiple 1/4 wave elements fed in series , the radiation from each adds in phase to produce a large vertically polarised omni-directional antenna with bstantial gain
Build a 2.4GHz Vertical antenna
Array built here will yield 6dBi gain in a radome of less than a meter
Build A 9dB, 70cm Collinear Antenna
First remember that there is something called the velocity factor for coaxial cable. For RG58/U coax it is typically .66. All that aside now, lets calculate the 1/2 wavelength of RG58/U coaxial cable with a frequency of 444 Megahertz
Coaxial Colinear For 432 MHz
You can use low-cost coaxial cacle to make a simple high performance omnidirectional vertical antenna
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The guiding principle is that we have multiple 1/4 wave elements fed in series , the radiation from each adds in phase to produce a large vertically polarised omni-directional antenna with bstantial gain
Array built here will yield 6dBi gain in a radome of less than a meter
First remember that there is something called the velocity factor for coaxial cable. For RG58/U coax it is typically .66. All that aside now, lets calculate the 1/2 wavelength of RG58/U coaxial cable with a frequency of 444 Megahertz
You can use low-cost coaxial cacle to make a simple high performance omnidirectional vertical antenna
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