A 30-GHz Integrated Subharmonic Mixer Based on a Multichannel Graphene FET

被引：61

作者：

Habibpour, Omid ^{[1
]}

Vukusic, Josip ^{[1
]}

Stake, Jan ^{[1
]}

机构：

[1] Chalmers Univ Technol, Terahertz & Millimetre Wave Lab, Dept Microtechnol & Nanosci, SE-41296 Gothenburg, Sweden

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2013年 / 61卷 / 02期

关键词：

Graphene; harmonic-balance analysis; microwave field-effect transistors (FETs); millimeter-wave mixers; monolithic microwave integrated circuit (MMIC); subharmonic resistive mixers; RESISTIVE MIXER; GHZ; RF; TECHNOLOGY;

D O I：

10.1109/TMTT.2012.2236434

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：

A 30-GHz integrated subharmonic mixer based on a single graphene field-effect transistor (G-FET) has been designed, fabricated, and characterized. The mixer is realized in microstrip technology on a 250-m-high-resistivity silicon substrate. In order to enhance the current on-off ratio, the G-FET utilizes a channel consisting of an array of bow-tie structured graphene, yielding a current on-off ratio of 7. A conversion loss (CL) of 19 +/- 1 dB over the frequency range of 24-31 GHz is obtained with a local oscillator (LO) to RF isolation better than 20 dB at an LO power of 10 dBm. The overall minimum CL is 18 dB at 27 GHz. The mixer has a 3 GHz +/- 1-dB IF bandwidth, which is achieved with a fixed LO signal of 15 GHz. The mixer linearity is characterized and the highest third-order intercept point is measured to be 12.8 dBm.

引用

页码：841 / 847

页数：7

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