RADIAL LINE STUBS AS ELEMENTS IN STRIPLINE CIRCUITS,

Abstract

It is shown that radial line stubs are attractive as shunt elements in strip line circuits because very low input impedance can be obtained over a large frequency range and with a well defined 'point' of contact. This well defined point of contact also prevents excitation of transverse modes which could be supported in some part of the stub. To illustrate the use of such stubs, a low pass filter with a cut-off frequency of 3.54 GHz has been designed with uniform line series elements and radial line shunt elements. The filter shows essentially the predicted pass band characteristic, but the stop band has been displaced towards lower frequencies and a spurious response is found around 8.8 GHz. The displacement is found to be caused by fringing capacitance at the end of each stub and the spurious response is believed to be due to insufficient ground plane interconnection. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1967
Accession Number
AD0657952

Entities

People

  • Jorgen P. Vinding

Organizations

  • Lockheed Martin Missiles and Space

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Capacitance
  • Displacement
  • Electrical Impedance
  • Excitation
  • Filters
  • Frequency
  • Impedance
  • Low Pass Filters
  • Strip Transmission Lines
  • Transverse

Fields of Study

  • Engineering
  • Physics

Readers

  • Approximation Theory.
  • Microwave Engineering.