Suppression of Parallel Plate Modes in Low Frequency Microstrip Circuit Packages Using Lid of Printed Zigzag Wires Articles uri icon

publication date

  • July 2013

start page

  • 359

end page

  • 361


  • 7


  • 23

International Standard Serial Number (ISSN)

  • 1531-1309

Electronic International Standard Serial Number (EISSN)

  • 1558-1764


  • This work deals with the suppression of parallel plate and cavity modes in shielded microstrip circuits operating at the lower microwave frequency range. The suppression is achieved by using a lid made of zigzag wires printed periodically on narrow slices of ungrounded circuit boards, located vertically side by side. This structure is very compact both in periodicity and height, it suppresses cavity modes over about an octave 2: 1 bandwidth, and it does not interfere with the packaged microstrip circuit.


  • electromagnetic bandgap; antennas; bed