An X-Band Quasi-Circulator GaAs MMIC

被引：0
|
作者：
Marzall, Laila [1 ]
Popovic, Zoya [1 ]
机构：
[1] Univ Colorado, Dept Elect Engn, Boulder, CO 80309 USA
来源：
2019 IEEE INTERNATIONAL CONFERENCE ON MICROWAVES, ANTENNAS, COMMUNICATIONS AND ELECTRONIC SYSTEMS (COMCAS) | 2019年
关键词：
Active circulators; Quasi-circulators; Lange couplers; MMIC; MMIC circulators; NOISE; POWER;
D O I：
10.1109/comcas44984.2019.8958125
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This paper presents the design of a 8-12 GHz quasi circulator fabricated in a 0.25 mu m GaAs pHEMT monolithic microwave integrated circuit (MMIC) process. The circuit consists of three Lange couplers which connect gates and drains of three equal gain-matched amplifiers. The coupling factor of the unequal-split Lange coupler is designed to achieve an isolation higher than 20 dB over a 40% bandwidth, with a return loss of better than 10 dB and an insertion gain of 2.4 dB across the band. The layout includes bias networks for the three amplifiers and occupies a 2.5 mm x2.5 mm die. The compact quasi-circulator is intended for use in full-duplex front ends.
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页数：4
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