Performance of a Nano-CNC Machined 220-GHz Traveling Wave Tube Amplifier

被引：150

作者：

Baig, Anisullah ^{[1
,2
]}

Gamzina, Diana ^{[1
]}

Kimura, Takuji ^{[3
]}

Atkinson, John ^{[3
]}

Domier, Calvin ^{[1
]}

Popovic, Branko ^{[1
]}

Himes, Logan ^{[1
]}

Barchfeld, Robert ^{[1
]}

Field, Mark ^{[4
,5
]}

Luhmann, Neville C., Jr. ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Elect & Comp Engn, Davis, CA 95616 USA

[2] Pakistan Inst Engn & Appl Sci, Dept Elect Engn, Islamabad 45650, Pakistan

[3] Commun & Power Ind, Microwave Power Prod Div, Palo Alto, CA 94304 USA

[4] Teledyne Sci & Imaging, Thousand Oaks, CA 91360 USA

[5] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

来源：

IEEE TRANSACTIONS ON ELECTRON DEVICES | 2017年 / 64卷 / 05期

关键词：

Millimeter wave; nano-CNC fabrication; terahertz vacuum electronics; traveling wave tube amplifier (TWTA); VACUUM ELECTRON DEVICES; MICROWAVE-POWER MODULE; DISPENSER CATHODES; GHZ; SIMULATION; DESIGN; GUIDE; BAND;

D O I：

10.1109/TED.2017.2682159

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：

We report on hot test measurements of a wide-bandwidth, 220-GHz sheet beam traveling wave tube amplifier developed under the Defense advanced research projects agency (DARPA) HiFIVE program. Nano-computer numerical control (CNC) milling techniques were employed for the precision fabrication of double vane, half-period staggered interaction structures achieving submicrometer tolerances and nanoscale surface roughness. A multilayer diffusion bonding technique was implemented to complete the structure demonstrating wide bandwidth (>50 GHz) with an insertion loss of about -5 dB achieved during transmission measurements of the circuit. The sheet beam electron gun utilized nanocomposite scandate tungsten cathodes that provided over 438-A/cm(2) current density in the 12.5: 1 ratio sheet beam. An InP HBT-based monolithic microwave integrated circuit preamplifier was employed for TWT gain measurements in the stable amplifier operation region. In the wide-bandwidth operation mode (for gun voltage of 20.9kV), a gain of over 24 dB was measured over the frequency range of 207-221 GHz. In the high-gain operation mode (for gun voltage of 21.8 kV), over 30 dB of gain was measured over the frequency range of 197-202 GHz. High-power tests were conducted employing an extended interaction klystron.

引用

页码：2390 / 2397

页数：8

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