A narrow band-pass filter type Wilkinson power divider for I-Q demodulator in microwave interferometer system

X. Wang, M. Yoshikawa, J. Kohagura, Y. Shima, R. Ikezoe, M. Sakamoto, T. Imai, Y. Nakashima, Z. Ma, I. Sakagami, A. Mase

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Abstract

I-Q (In-phase Quadrature) demodulator is one of key components in microwave interferometer system application. Normally, I-Q demodulator consists of amplifiers, mixers, 90 degree phase shifter, power divider and band-pass filters, and it is widely used in various microwave communication systems and measurement systems. In this paper, power divider and band-pass filters are newly designed as one single passive component, therefore, I-Q demodulator topology becomes simplified. The novel narrow band-pass filter type Wilkinson power divider not only provides extremely miniaturized circuit size, but also maintains the band-pass filter performance and power division function as well. One experimental circuit shows good agreement with the theoretical simulation.

Original languageEnglish
Article numberC11005
JournalJournal of Instrumentation
Volume10
Issue number11
DOIs
Publication statusPublished - Nov 12 2015
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Mathematical Physics
  • Instrumentation

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