Subterahertz Photonic Crystal Klystron Amplifier

被引：12

作者：

Stephens, J. C. ^{[1
]}

Rosenzweig, G. ^{[1
]}

Shapiro, M. A. ^{[1
]}

Temkin, R. J. ^{[1
]}

Tucek, J. C. ^{[2
]}

Kreischer, K. E. ^{[2
]}

机构：

[1] MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[2] Northrop Grumman Corp, Rolling Meadows, IL 60008 USA

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 24期

关键词：

HIGH-POWER; BAND;

D O I：

10.1103/PhysRevLett.123.244801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

This Letter reports the successful experimental demonstration of amplification of subterahertz radiation in a klystron with photonic crystal cavities. The klystron has six cavities, with each cavity having a series of oversized photonic crystal cells made up of a 5 x 3 array of square posts. The center post is removed from each cell to form a highly oversized (0.8 mm similar to lambda/4) beam tunnel, with power coupling from cell to cell through the tunnel. The pulsed electron beam is operated at 23.5 kV, 330 mA in a 0.5 T solenoidal field. At 93.7 GHz, a small-signal gain of 26 dB and a saturated output power of 30 W are obtained. Experimental results are in very good agreement with the predictions of a particle-in-cell code. The successful achievement of high gain operation of a photonic crystal klystron amplifier is promising for the future extension of klystron operation well into the terahertz frequency region.

引用

页数：5

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