MICROWAVE FILTERS AND COUPLING STRUCTURES

Abstract

Curves are presented giving the even-mode fringing capacitance, the odd-mode fringing capacitance, and the difference between odd and even mode fringing capacitances for wide ranges of thickness and spacing of rectangular bars centered between parallel plates. Simple formulas are given relating these capacitances to even and odd-mode characteristic impedances of coupled rectangular bars. Possible applications to strip-line and other circuits are described. A trial strip-line lower-sideband up-converter was constructed using previously developed theory. The measured 3-db bandwidth tuning range was 38.5% as compared to 40% for the design objective, and the peak gain was 12.6 db. The input band center was 946 mc while the sideband output was at 4,037 mc.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1961
Accession Number
AD0265342

Entities

People

  • G. L. Matthaei
  • W. J. Getsinger

Organizations

  • SRI International

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Amplifiers
  • Bandwidth
  • Capacitors
  • Cartography
  • Diodes
  • Electricity
  • Electronic Components
  • Frequency
  • Frequency Bands
  • Magnetic Fields
  • Mathematical Models
  • Microwave Filters
  • Microwaves
  • New York
  • Strip Transmission Lines
  • Transmission Lines
  • Varactor Diodes

Fields of Study

  • Physics

Readers

  • Microwave Engineering.

Technology Areas

  • Space