Design of An Efficient Wideband Quadrature Generator for Multiple Receivers Based on Poly-Phase Filter

This paper presents a two-stage RC poly phase filter for efficient wideband quadrature generation. The proposed PPF is followed by a transformer-based matching network. With a novel compact layout scheme, each quadrator could drive one more receiver channel without extra power requirement. Final simulation shows this work would averagely bring 2.4dB enhancement on output compared with conventional implementation from 23GHz to 29GHz. This work indicates an efficient realization in further MIMO system.