Accession Number : AD0657952

Title :   RADIAL LINE STUBS AS ELEMENTS IN STRIPLINE CIRCUITS,

Corporate Author : LOCKHEED MISSILES AND SPACE CO SUNNYVALE CALIF ELECTRONICS DIV

Personal Author(s) : Vinding,Jorgen P.

Report Date : 1967

Pagination or Media Count : 14

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)

Descriptors :   (*STRIP TRANSMISSION LINES, ELECTRICAL IMPEDANCE), RESISTORS, LOW PASS FILTERS, ADMITTANCE, ATTENUATION

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE