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Approximate synthesis formulas for microstrip line with aperture in ground plane
Author(s) -
Packiaraj D.,
Vinoy K. J.,
Kalghatgi A. T.
Publication year - 2012
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20591
Subject(s) - microstrip , ground plane , aperture (computer memory) , broadband , optics , microwave , electrical impedance , transmission line , electronic engineering , physics , acoustics , engineering , telecommunications , electrical engineering , antenna (radio)
Abstract Approximate closed‐form expressions for the propagation characteristics of a microstrip line with a symmetrical aperture in its ground plane are reported in this article. Well‐known expressions for the characteristic impedance of a regular microstrip line have been modified to incorporate the effect of this aperture. The accuracy of these expressions for various values of substrate thickness, permittivity and line width has been studied in detail by fullwave simulations. This has been further verified by measurements. These expressions are easier to compute and find immense use in the design of broadband filters, tight couplers, power dividers, transformers, delay lines, and matching circuits. A broadband filter with aperture in ground plane is demonstrated in this article. © 2011 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2012.