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2.4Ghz Helix antenna
Antenna especially for frequencies in the range 2 - 5 GHz this design is very easy, practical, and, non critical
post 14 Apr 2024
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QHA Quadrifilar Helix Antenna
La QHA nasce come antenna per RX dei satelliti polari NOAA, METEOR
Quadrafilar Helix antenna for 436 Mhz
This is an antenna that I just built. I intend on using for receiving the AO-27 downlink at 436.800 +/- doppler. It is built with right hand circular polarization, and the gain is supposed to be in the neighborhood of 3 DB
Quadrifilar helix antenna for 137 Mhz
I had always wanted to try and receive a signal from a satellite using my scanner
Quadrifilar Helix Antennas QHA
The Quadrifilar Helical Antenna, it ideal for a number of uses. Satellite reception and transmission may be number one among them
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La QHA nasce come antenna per RX dei satelliti polari NOAA, METEOR
This is an antenna that I just built. I intend on using for receiving the AO-27 downlink at 436.800 +/- doppler. It is built with right hand circular polarization, and the gain is supposed to be in the neighborhood of 3 DB
I had always wanted to try and receive a signal from a satellite using my scanner
The Quadrifilar Helical Antenna, it ideal for a number of uses. Satellite reception and transmission may be number one among them
Linear loaded short dipole 21Mhz For my amateur radio activities on the HF bands I only have a 3.6 m wide balcony available for antennas. After some study I decided to experiment with a shortened dipole for the 15 m band
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
A simple SWR Meter is to be used at HF An SWR meter provides information about how well matched is your antenna with the transmitter and how well power is being radiated