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2 Meter Halo Antenna


Wanted an antenna that was simple, horizontally polarized and omni directional
post 10 May 2024
2 Meter Halo Antenna

Antenna for UHF VHF Links

155



Meter loopThe Antenna is more or less Omni Directional and horizontally polarized.It presents a high takeoff angle and is intended for use in the 144.200mhz area

New Helix Antenna DesignGain: 15.9 dBci approximately 1 to 1.5 dB better than the standard Helix antennas I have modeled, pattern: First Side lobes at 36 degrees down 14 dB Average of all remaining sidelobes <25 dB, bandwidth: <0.2 dB variability from 432 to 438 Mhz 50 Ohm Match at <1.2 VSWR from 432 to 438 Mhz

Omni-Gain Vertical Collinear for VHF and UHFAn omnidirectional collinear, is capable of surviving harsh environments. It's a good choice for repeater installations and can be top, or side mounted to the tower

Origine et principe de l'antenne directiveSimplicity in terms of its performance, equivalence with a Yagi antenna, optimally sized, three elements with wide spaced, or four elements with close spaced

Quad 4 elementi per i 144 MhzQuad 4 elementi il guadagno da circa 5,87 dbD ad un valore prossimo ai 10 dbD,con un rapporto F/B attorno ai 20 db ed un'impedenza caratteristica di 50 ohm


Antenna splitter per VHF-UHF per quattro ricevitori

Antenna splitter per VHF-UHF per quattro ricevitori Chi dispone di una sola antenna e vuole collegarvi più di un ricevitore necessità di uno splitter

Kits and Components

Amateur radio kits by Kanga US

50MHz to 28MHz RX Converter

50MHz to 28MHz RX Converter The concept of the rx converter is quite simple and nothing really new. the local oscillator is a standard colpitts crystal oscillator producing the 22mhz lo signal