Comment on diy qfh antenna
skillissuer@discuss.tchncs.de 4 weeks agowait, do you want to use it at 140-ish MHz? these antennas will be quite sizable no matter what you do. you can make cross-dipole yagi but with loops instead of straight elements to make it a bit more compact. again, one director will be fine. take reflector + driven element from there www.robkalmeijer.nl/techniek/…/index.html and first director from there iw5edi.com/…/directional-antennas-cubical-quad this will get you antenna looking roughly like a cube with 50cm side. i don’t think you can get much more compact
skillissuer@discuss.tchncs.de 4 weeks ago
now that i’m thinking, you can make loop antenna with circular polarization and mesh reflector with closer spacing that would be even more compact and that would have more of one sided donut shaped radiation pattern, which would be probably more suitable for your application, but it’s guaranteed to have different impedance and so would require simulation