Biquad UHF Antenna Array

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AN-SOF Antenna Simulator Group

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Nov 6, 2022, 8:27:47 PM11/6/22
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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

Beam width 50°

F/B 21 dB

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

It may be noticed that the polar plots are on a log scale. ARRL-style log scaling is coming in the December release of AN-SOF!

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AN-SOF_BiquadArray.png

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