Duplexer designed on the basis of microstrip filters using high dielectric constant substrates

  • A. V. Zakharov
  • S. A. Rozenko
Novel Radio Systems and Elements


A microstrip duplexer for a modification of a PCS communication system operating at frequencies of 1.84–1.87 and 1.75–1.78 GHz is described. The duplexer containing microstrip bandpass filters on high dielectric constant substrates (ɛ r = 92) are compared with duplexers manufactured on microwave ceramic materials with high values of ɛ r . The microstrip bandpass filters use stepped-impedance resonators placed one near another with a gap of 0.1–0.2 mm. It is shown that the microstrip duplexer has slightly lower insertion loss and occupies smaller volume than a duplexer using coaxial dielectric resonators having a rectangular cross section of 3 × 3 mm and ɛ r = 92.


Return Loss Line Section Microstrip Line Voltage Standing Wave Ratio Lower Insertion Loss 
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Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  • A. V. Zakharov
    • 1
  • S. A. Rozenko
    • 1
  1. 1.National Technical University of Ukraine Kiev Polytechnic InstituteKievUkraine

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