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Biquad UHF Antenna Array

This relatively compact 4-element biquad array resonates at 434 MHz. The wires that connect the driven element to the reflector work as a two-wire transmission line that allows us to obtain an input impedance of 50 + j0 Ohm. So, this design can be fed directly with a 50 Ohm coax.  

Bandwidth 4% (VSWR < 2)

Gain 12 dBi

Beamwidth 50°

F/B 21 dB

Slices H and V of the radiation pattern show that it is very symmetrical.

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