In the paper. a wideband miniaturized impedance-transforming quadrature four-feed network with a flat output phase difference is presented and applied to the design of an active integrated GNSS antenna where no extra impedance matching circuit is needed. The features of impedance transformation and flat output phase difference are achieved by the proposed miniaturized rat-race coupler... https://www.roneverhart.com/Corvette-Taillight-Assembly-Inner-W-Backup-1980-1982/