Biquad Antenna 70 cm / Hybrid Doppequad

Biquad Antenna 70 cm / Hybrid Doppequad

Mike R.
Dimensions as per Antenna Rothammel Book. Haven't built yet, optimise match acc to distance betwe. elements and reflector. Experiment with the layers and you'll get dims and alt. reflector. Should have a balun, feed in centre of bi quad arrangement. Feedpoint reportedly 60 Ohm. OK, built the thing now with smaller reflector wall and with a network analyser it shows that this is about correct. Put a 1:1 balun in, though. No further matching necessary. Pretty safe to build I suppose. Just be aware that the impedance without reflector is totally different! #70cm #Amateur_Radio #Antenna #Ham #Ham_Radio
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