Marki Microwave bare die RF/microwave bidirectional quad hybrids produce a 90� phase difference between the through and coupled ports, with inherent isolation between the input and isolated ports. They feature a broadband 50 � match, low insertion loss, and tight amplitude and phase balance. Quad hybrid products are reciprocal devices and any port can be used as the input. Common applications include PIN diode and MMIC switch networks, balanced amplifier topologies, and quadrature signal generation for IQ and image-reject mixers.