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Improved Microstrip Filters Using PMC Packaging by Lid of Nails

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3 Author(s)
Brazalez, A.A. ; Dept. of Signals & Syst., Chalmers Univ. of Technol., Gothenburg, Sweden ; Zaman, A.U. ; Kildal, P.-S.

This paper shows that microstrip filters perform like textbook examples when packaged with perfect magnetic conductor (PMC). A PMC is made as a pin surface or lid of nails, and this is used to package a microstrip parallel coupled line bandpass filter. Our measurements confirm that parallel plate, cavity modes, and radiation are suppressed. This paper also includes a study of the reasons for a frequency shift between the ideal PMC packaged case and the realized case.

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Components, Packaging and Manufacturing Technology, IEEE Transactions on  (Volume:2 ,  Issue: 7 )