Double Bi-quad Antenna Design Calculator


Double bi-quad antenna dimension calculator

Back to Antenna calculator overview.On-line antenna designer. Calculate the required dimensions for a collinear dipole antenna construction for any given frequency.

Enter the required frequency in MHz and the antenna designer will calculate the dimensions of the elements as shown below.

Enter Frequency (MHz)

The dual bi-quad antenna, also known as the 'bow-tie' antenna is a directional antenna ideal for use with mobile phones for UMTS, G2, G3, G4 and WiFi equipment. It can be constructed from any common household copper wire 2-2.5mm. The reflective surface can be any conductive material, I have heard that even CD's work as effective reflectors.

Performs really well for WiFi and can be used for RX and TX purposes. It can be made from any common copper household electrical wire. The thicker the wire, the wider the bandwidth of the antenna from its center frequency.

Frequency calculations are based on radio waves traveling at the speed of light 299 792 458 meters per second.

A: ? mm

B: ? mm

C: ? mm

D: ? mm

E: ? mm

Dual Bi-Quad Antenna
Dual B-Quad Connection

Antenna connection

Dual Bi-Quad Spacing

Element overlap spacing

Above images show a prototype dual bi-quad antenna built for WiFi using this antenna calculator.

With the reflector installed it becomes a directional antenna with more gain. This antenna can be used with vertically and horizontally polarized RF services.

Dual Bi-quad Antenna Design