期刊
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
卷 33, 期 2, 页码 208-211出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LMWC.2022.3204546
关键词
AlGaN/GaN; high breakdown voltage; lateral; limiter; Schottky barrier diode (SBD)
A thin-barrier AlGaN/GaN Schottky barrier diode was proposed and implemented in a high-power RF limiter module, achieving better performance in terms of power capacity and frequency compared to traditional limiters.
In this letter, a thin-barrier AlGaN/GaN Schottky barrier diode (SBD) is proposed and implemented in a three-stage high-power RF limiter module. Benefited from the thin-barrier epitaxy, a recess-free process in the Schottky region is allowed to avoid the plasma damage, resulting in low on-resistance of 5 Omega and high withstand voltage characteristics. In addition, the proposed SBDs have achieved a low junction capacitance of 0.35 pF at 0 V bias and a turn-on voltage of 0.5 V. With the optimized SBD and well-designed matching circuits, the limiter has reached a high power capacity of over 10 W in continuous wave (CW), 20 W in pulse mode, and a fast recovery time of 30 ns at a frequency of 3.5 GHz, exhibiting better characteristics than traditional limiters. Both simulation and measured results agree with each other. It indicates that the AlGaN/GaN-based SBD is promising for high-power and high-frequency limiters.
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