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  4. Coplanar 4-bit HEMT phase shifters for 94 GHz phased array radar systems
 
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1999
Conference Paper
Title

Coplanar 4-bit HEMT phase shifters for 94 GHz phased array radar systems

Other Title
Koplanarer 4-Bit-Phasenschieber für Radar-Systeme mit phasengesteuerten Antennen bis 94 GHz
Abstract
Coplanar 4-bit phase shifters for W-band operation at 94 GHz have been developed using PM-HEMTs as switching elements. The phase shifter MMIC uses double stub loaded lines and branch line couplers. A two-stage variable gain cascode amplifier was integrated with the phase shifter. This combination has insertion gain of 2-8 dB and occupies an area of 1.5x4 mm2. A redesigned version of the phase shifter occupies 1x2.5 mm2 chip area, and has a standard phase deviation of less than 2.1 deg for all phase states.
Author(s)
Züfle, K.
Steinhagen, F.
Haydl, W.H.
Hülsmann, A.
Mainwork
IEEE MTT-S International Microwave Symposium Digest 1999. Vol.1  
Conference
International Microwave Symposium 1999  
Language
English
Fraunhofer-Institut für Angewandte Festkörperphysik IAF  
Keyword(s)
  • GaAs

  • MMIC

  • phase shifter

  • Phasenschieber

  • W-band

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