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Ground plane vhf 1/4 l'ambda
Antenna Ground plane (GP) has the property of receiving and transmitting in an omnidirectional way, that is to say everywhere equally
post 04 Apr 2024
Antenna for UHF VHF Links →
Building UHF Antennas
His method of construction can be used on most UHF through "low" microwave Yagis, and is especially useful for the 33, 23 and 13 cm bands
Build a 2m 8db collinear for £20
I started to build the antenna by cutting four lengths of wire, the measurement is 38.75ins for a half wave 145mhz but I cut them at 39.75ins
Dipolo-Bazooka
Questa antenna, realizzata con cavo coassiale di 52 Ohm, coincide perfettamente con l'impedenza presente al connettore d'antenna
A Tree Friendly 2 Meter Halo Antenna
The antenna is in fact nothing else but a half wavelength dipole with the legs bent in the shape of a circle
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His method of construction can be used on most UHF through "low" microwave Yagis, and is especially useful for the 33, 23 and 13 cm bands
I started to build the antenna by cutting four lengths of wire, the measurement is 38.75ins for a half wave 145mhz but I cut them at 39.75ins
Questa antenna, realizzata con cavo coassiale di 52 Ohm, coincide perfettamente con l'impedenza presente al connettore d'antenna
The antenna is in fact nothing else but a half wavelength dipole with the legs bent in the shape of a circle
Take off angle of horizontal antenna For horizontal polarization, the electric field will move sideways on a horizontal plane, while for vertical polarization it will oscillate up and down on a vertical plane
Rx antennas 4Square Rx Vertical Array My frequency design of 1.825 MHz a 90 degrees line would be 33,70 metersinstead of the previously calculated 33,27 m
Atu balanced feeder antenna system An ATU has the advantage of bringing the feeder-antenna system to resonance, act as a band pass filter both on receive and transmit and a low SWR