Fast Prototyping of a Butler Matrix Beamforming Network

Application ID: 42531

A Butler matrix is a passive beamforming feed network. It is a cost-effective feed network for phased array antennas because the circuit can be fabricated in the form of microstrip lines and is a viable solution for performing beam scanning without deploying expensive active devices.

This example shows how to design such a circuit using the Transmission Line interface. The results show the logarithmic voltage on the Butler matrix beamforming circuit at 30 GHz and the arithmetic phase progression at each output port.

This model example illustrates applications of this type that would nominally be built using the following products: