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
F/B 21 dB
Slices H and V of the radiation pattern show that it is very symmetrical.