Compact Circularly Polarized Quadrifilar Antenna Design
By N7LRYThis project details the construction of a compact, circularly polarized Quadrifilar Helix Antenna (QHA) designed for 146 MHz operation. The antenna features a 1/2λ1/2λ helical design with a 2.6:1 aspect ratio, providing 4.5 dB gain and a spheroid radiation pattern. It is ground plane independent and compatible with both vertical and horizontal polarizations, making it ideal for terrestrial and space communications. The design includes step-by-step instructions for building the antenna using readily available materials like aluminum rods, PVC pipes, and RG-58 coaxial cable. The antenna's performance has been validated through comparisons with commercial omnidirectional antennas, showing superior results.
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Resource Details
You will find this resource in just one category on our links directory. The title of the main category is Quadrifilar Helix and it deals mainly with QFH Antennas provides circular polarization and a near hemispherical coverage. A popular usage is for satellite reception.. The link to this resource has been on our site since Wednesday Mar 5 2025, and it has been followed 39 times. So far it received 1 votes for a total score of 1.00/10
Last updated: 2025-03-14
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