A 30 GHz Variable Gain Amplifier With High Output Voltage Swing for Ultra-Wideband Radar

Sewiolo B, Fischer G, Weigel R (2009)


Publication Type: Journal article

Publication year: 2009

Journal

Publisher: IEEE

Book Volume: 19

Pages Range: 590-592

Journal Issue: 9

DOI: 10.1109/LMWC.2009.2027094

Abstract

This paper reports on the analysis, design and characterization of a 30 GHz fully differential variable gain amplifier for ultra-wideband radar systems. The circuit consists of a variable gain differential stage, which is fed by two cascaded emitter followers. Capacitive degeneration and inductive peaking are used to enhance bandwidth. The maximum differential gain is 11.5 dB with plusmn1.5 dB gain flatness in the desired frequency range. The amplifier gain can be regulated from 0 dB up to 11.5 dB. The circuit exhibits an output 1 dB compression point of 12 dBm. The measured differential output voltage swing is 1.23 Vpp. The 0.75 mm2 broadband amplifier consumes 560 mW at a supply voltage of plusmn3.3 V. It is manufactured in a low-cost 0.25 mum SiGe BiCMOS technology with a cut-off frequency of 75 GHz. The experimental results agree very well with the simulated response. A figure of merit has been proposed for comparing the amplifier performance to previously reported works.

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How to cite

APA:

Sewiolo, B., Fischer, G., & Weigel, R. (2009). A 30 GHz Variable Gain Amplifier With High Output Voltage Swing for Ultra-Wideband Radar. IEEE Microwave and Wireless Components Letters, 19(9), 590-592. https://dx.doi.org/10.1109/LMWC.2009.2027094

MLA:

Sewiolo, Benjamin, Georg Fischer, and Robert Weigel. "A 30 GHz Variable Gain Amplifier With High Output Voltage Swing for Ultra-Wideband Radar." IEEE Microwave and Wireless Components Letters 19.9 (2009): 590-592.

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