One single travelling-wave MMIC for highly linear broadband - Mixers and variable gain amplifiers

被引：7

作者：

Kallfass, I ^{[1
]}

Purtova, T ^{[1
]}

Brokmeier, A ^{[1
]}

Ludwig, W ^{[1
]}

Schumacher, H ^{[1
]}

机构：

[1] Univ Ulm, Dept Electron Devises & Circuits, D-89069 Ulm, Germany

来源：

2005 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM, VOLS 1-4 | 2005年

关键词：

MMIC mixer; MMIC amplifiers; broadband amplifiers; microwave frequency conversion;

D O I：

10.1109/MWSYM.2005.1516530

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 travelling-wave circuit concept allowing device application both as ultra-broadband mixer and variable gain distributed amplifier is presented and demonstrated. The compact layout MMIC is realized in a 0.15 mu m GaAs pHEMT technology. Cascode amplifier cells with current-voltage feedback are used in eight-stage distributed configuration. In VGA mode, the gain may be controlled between 5-12dB with a near-constant bandwidth of up to 43GHz and excellent power matching properties. The amplifier is capable of delivering 20dBm to a 50 Omega load. Being operated as travelling-wave mixer, the device exhibits 2dB conversion loss in a bandwidth exceeding 50GlIz, while requiring the comparatively low LO power of 5dBm. Mixer operation is demonstrated both for downconversion to fixed IF- and for broadband conversion using fixed LO frequencies. In mixer mode, exceptionally high input-related linearity of 6dBm is reached.

引用

页码：97 / 100

页数：4

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