A 250 nm GaN N-Path Filter IC with +27 dBm Blocker Tolerance

A fully integrated 250 nm GaN bandpass N-path filter is presented for high blocker tolerance applications. Measurements from 200 MHz to 1.9 GHz of a 4-phase shunt architecture demonstrate a broadband tunable bandpass response with insertion loss less than 5 dB, out-of-band rejection of 18 dB, in-band blocker B1dB of +18 dBm, and out-of-band blocker B1dB of +27 dBm.