Wideband 15–50GHz symmetric multi-section coupled line quadrature hybrid based on surface micromachining technology

This paper demonstrates a quadrature hybrid developed using the surface micromachining technology PolyStrata™. Circuit model designs are optimized over 15–50GHz and a full-wave 3D model is tuned computationally to better approximate ideal performance. The full-wave results show misbalances below 0.5dB and 5° for magnitude and phase, respectively. Designed device is fabricated and good agreement with simulations is obtained.