F2923 Low Insertion Loss SPDT Absorptive RF Switch

Renesas introduced the industry's first single-pole, double-throw (SPDT) RF switch featuring its patent-pending K|_Z| constant impedance technology. The Renesas F2923 is a low insertion loss SPDT absorptive RF switch designed for a multitude of RF applications, including base stations (2G, 3G, 4G, and 5G), wireless backhaul, CATV, and portable handhelds.

The K|_Z| feature controls all port impedances when switching between RF ports, preserving the return loss. Standard switches without K|_Z| create a large voltage standing wave ratio (VSWR) transient when switching RF paths because the impedance of the switch is not well controlled during the switching event. A VSWR transient can degrade system performance and reduce reliability. Benefits of K|_Z| in different dynamic or "hot switching" scenarios include:

• Avoiding damage and error-inducing transients when switching between two RF elements such as PAs, drivers, and LNAs
• Minimizing transient amplitude and phase error on the unswitched path(s) when switching a path of a distribution network such as a 3 dB coupler or 4-way splitter