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Design and construction details of a helical antenna


Design and construction details of a helical antenna
Here is a page with images of a 3-turn helicoid that was built for a reception system in the 1690 MHz band
post 06 Jul 2024


Helix Antennas Links

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2m-70cm-quadrifilar-helical-antenna
Build a pair of QHAs, one for 2 meter and one for 70 cm. A diplexer is of course needed to connect both to the single antenna connector of a dualband radio

2.4Ghz Helix antenna
Antenna especially for frequencies in the range 2 - 5 GHz this design is very easy, practical, and, non critical

2400 MHz Helix Antenna
This antenna is easy to build and suitable for broadband work, satellite work and terrestrial work


Linear-loaded-short-dipole-21mhz

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

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

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