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A Novel Compact Suspended Stripline Resonator

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2 Author(s)
Ruf, R. ; Inst. of Microwace Tech., Univ. of Ulm, Ulm, Germany ; Menzel, W.

Suspended stripline (SSL) provides a transmission line medium featuring many advantages, but due to the effective permittivity being close to unity, distributed elements are usually bulky. This letter introduces a novel SSL resonator, which is both compact and low loss. For that purpose, cuboid shaped bricks of metal are incorporated into the SSL channel in the vicinity of the open-circuited side of the resonator. Through this capacitive loading, the area occupied by the resonator can be reduced by a factor of about 5, yet maintaining a high quality factor. The feasibility of this new resonator type is demonstrated with an example bandpass filter at 670 MHz center frequency showing both compact size and low insertion loss.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:22 ,  Issue: 9 )