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An electromagnetic crystal (EMXT) with a bandgap around 35 GHz is used as the top and/or bottom walls of a rectangular waveguide. Because of its bandgap, such an EMXT waveguide is a very effective band-stop filter with the rejection band centered at 35 GHz. More than 70 dB of isolation for the rejection band and less than 2 dB of insertion loss for the pass band are measured. Finite element simulation of the EMXT band-stop filter agrees very well with measurements. Using tunable EMXT walls, a band-stop filter with adjustable center frequency and bandwidth can also be realized.
Published in:
Microwave and Wireless Components Letters, IEEE
(Volume:13
,
Issue:
3
)
Date of Publication: March 2003
- Page(s):
- 108 - 110
- ISSN :
- 1531-1309
- INSPEC Accession Number:
- 7558933
- Digital Object Identifier :
- 10.1109/LMWC.2003.810121
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 20 March 2003
- Issue Date :
- March 2003
- Sponsored by :
- IEEE Microwave Theory and Techniques Society
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