The Design and Performance of Three-Line Microstrip Couplers Article

Pavlidis, D, Hartnagel, HL. (1976). The Design and Performance of Three-Line Microstrip Couplers . IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 24(10), 631-640. 10.1109/TMTT.1976.1128928

cited authors

  • Pavlidis, D; Hartnagel, HL

authors

abstract

  • An analysis is presented of microstrip-coupler circuits consisting of three parallel lines. The analysis is based on the existence of three mode impedances. Design equations describing the performance of this type of coupler are derived and allow the prediction of its matching and transmission properties. Numerical results using finite-difference methods are presented for a three-line microstrip coupler made on an alumina substrate (k = 9.8). Experimental results for a 10-dB three-line coupler with a center frequency of 4 GHz show that its performance can be reasonably well predicted by the developed theory. Copyright © 1976 by The Institute of Electrical and Electronics Engineers, Inc.

publication date

  • January 1, 1976

published in

Digital Object Identifier (DOI)

start page

  • 631

end page

  • 640

volume

  • 24

issue

  • 10