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Hentenna per i 144 Mhz
div>Rientra nella categoria delle loop e' stata inventata e sviluppata attorno agli anni 1970 da un gruppo di tre radioamatori giapponesi JE1DEU-JH1FCZ-JH1YST
post 14 Jun 2024
Antenna for UHF VHF Links →
2 Meter Array
Here is a little project that I can recommend to anyone looking for a small vertical phased array
2 meter 146MHz 5/8 Ground plane antenna
The reason for selecting the 5λ/8 wave ground plane is that for a simple single element antenna it appeared to have increased capture aperture when compared to the standard λ/4 wave length ground plane antenna and has a relatively low angles of radiation in comparison with other similar antennas
2 meter dipole antenna
The reason for selecting the 5/8 wave ground plane is that for a simple single element antenna it appeared to have increased capture aperture when compared to the standard 1/4
2 Meter RDF dipoles
Is a functional prototype of a upcoming Byonics product in our T-Hunting / RDF product line
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Here is a little project that I can recommend to anyone looking for a small vertical phased array
The reason for selecting the 5λ/8 wave ground plane is that for a simple single element antenna it appeared to have increased capture aperture when compared to the standard λ/4 wave length ground plane antenna and has a relatively low angles of radiation in comparison with other similar antennas
The reason for selecting the 5/8 wave ground plane is that for a simple single element antenna it appeared to have increased capture aperture when compared to the standard 1/4
Is a functional prototype of a upcoming Byonics product in our T-Hunting / RDF product line
23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency
50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection
30 Volt Computer Power Supply Stack A bonus was that i discovered that these did not need a standby load connected to the supply to keep them running just apply mains power and close the Start lead to ground