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W-band waveguide-packaged InP HEMT reflection grid amplifier
被引：3
|作者：
Chung, Younkyu
Cheung, Chun-Tung
DeLisio, Michael P.
Rutledge, David B.
机构：
[1] CALTECH, Pasadena, CA 91125 USA
[2] Wavestream Corp, San Dimas, CA 91773 USA
关键词：
grid amplifier;
mode converter;
orthogonal mode transducer (OMT);
spatial power combining;
D O I：
10.1109/LMWC.2006.875629
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 letter presents a 79-GHz broadband reflection-type grid amplifier using spatial power combining to combine the power of 64 unit cells. Each unit cell uses a two-stage cascade configuration with InP HEMTs arranged as a differential pair. A broadband orthogonal mode transducer (OMT) separates two orthogonally polarized input and output signals over a 75 to 85 GHz range. In conjunction with the OMT, a mode converter with quadruple-ridged apertures was designed to enhance the field uniformity over the active grid. Measurements show 5-dB small signal gain at 79 GHz and an 800-MHz 3-dB bandwidth. The amplifier generates an output power of 264 mW with little evidence of saturation.
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页码：324 / 326
页数：3
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