Abstract

This paper describes the design and performance of high dynamic range MMIC up- and down-converters fabricated in a 0.25- µm PHEMT process. The measured up-converter provides 6 to 8 dB conversion loss in the band from 22 to 34 GHz, where fIF = 1 GHz and PLO = +16 dBm. A two-tone, 3 rd -order intermodulation suppression of –50 dBc was measured at Pout = -6 dBm per tone for the up-converter and Pin = -4 dBm per tone for the down-converter, where each chip consumes a mere 1.5 x 1.8 mm 2 . These levels of performance make these chips very attractive for LMDS applications where linearity is critical to system implementation.