Authors
Paige Danielson, Prof. Laila Marzall, and Prof. Zoya Popovic
Abstract
Two MMIC chip Butler matrices are presented that operate around 40GHz. These beamforming networks are designed to be easy to integrate with other front-end components and low loss, manufactured on WIN Semiconductors' PP10-20 process. The first chip is a static Butler matrix centered at 44GHz. The second chip is a Butler matrix that includes the addition of a tunable phase shifter which allows for frequency tuning from 40GHz to 44GHz, lowering phase error. These chips allow for beamsteering with limited deviation from the expected beam direction and have losses competitive to published phase shifters around this frequency.