S-Band MMIC Active Module with Small Phase Variation and Low Insertion Loss for Beamforming Network

Hideki TAKASU  Chihiro SAKAKIBARA  Minoru OKUMURA  Susumu KAMIHASHI  Yasushi MATSUMOTO  Shin-ichi HAMA  

IEICE TRANSACTIONS on Electronics   Vol.E83-C   No.1   pp.122-124
Publication Date: 2000/01/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwaves, Millimeter-Waves
MMIC module,  attenuator,  phase shifter,  buffer amplifier,  

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This paper describes a monolithic microwave integrated circuit (MMIC) active module with small phase variation and low insertion loss for beamforming network in S-band. The MMIC active module composed of a digital phase shifter, a digital attenuator and a buffer amplifier, has characteristic to control amplitudes and phase shifts by using digital control signals. By using the digital attenuator, the MMIC active module has obtained the excellent performances. This paper also describes the exact on-state resistance of FET switch for designing the digital attenuator.