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2011
Conference Paper
Titel
Broadband GaN-based switch-mode core MMICs with 20 W output power operating at UHF
Abstract
A high power broadband switch-mode core MMIC has been developed for an application in digital switch-mode power amplifiers, e.g., class-S, for mobile communications. The threestage design can be flexibly used at any frequency operating in UHF band up to a maximum digital bit rate of 3 Gbps, equal to a square wave frequency of 1.5 GHz. At 0.9 Gbps a maximum broadband output power of 20.5 W was measured at a drain efficiency of 76% and a power added efficiency of 70%. Controlled by a digital signal with a peak-to-peak amplitude of 3.5 V, a large signal gain of 25.3 dB was achieved.