New Microstrip Gap Waveguide on Mushroom-Type EBG for Packaging of Microwave Components Articles uri icon

publication date

  • March 2012

start page

  • 129

end page

  • 131


  • 3


  • 22

International Standard Serial Number (ISSN)

  • 1531-1309

Electronic International Standard Serial Number (EISSN)

  • 1558-1764


  • The gap waveguide has been recently presented as a new transmission line technology using artificial magnetic conductors (AMCs) to allow the wave propagation only along a desired path. The first validation has been provided using a lid of metal pins as AMC for high frequency applications. In this letter, simulations and measurement results are presented for another version called microstrip gap waveguide, working as inverted microstrip line and realized using a mushroom-type EBG surface. The transmission line is surrounded by mushrooms which create a parallel plate stop band, suppressing cavity modes and unwanted radiations compared to standard packaged microstrip transmission lines. The field propagates in the air gap between the upper lid and the mushrooms layer, providing a low loss compact circuit made in printed technology


  • gap waveguides; microstrip lines; mushrooms-type electromagnetic band-gap (ebg); packaging