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Progress In Electromagnetics Research Letters
ISSN: 1937-6480
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MODIFIED BROADBAND SCHIFFMAN PHASE SHIFTER USING DENTATE MICROSTRIP AND PATTERNED GROUND PLANE

By Z. Zhang, Y.-C. Jiao, S.-F. Cao, X.-M. Wang, and F.-S. Zhang

Full Article PDF (252 KB)

Abstract:
In this letter, a modified broadband 90° phase shifter is proposed. By using a dentate microstrip and a patterned ground plane, an extremely tight coupling can be obtained, and consequently a constant phase shift over a wide bandwidth can be achieved. To verify the proposed idea, a topology is implemented, the measured results of a phase difference of 90 ± 5° in 79.5% bandwidth, better than 10 dB return loss across the whole operating band, are also given. The measurement results agree well with the full-wave electromagnetic simulated responses.

Citation:
Z. Zhang, Y.-C. Jiao, S.-F. Cao, X.-M. Wang, and F.-S. Zhang, "Modified Broadband Schiffman Phase Shifter Using Dentate Microstrip and Patterned Ground Plane," Progress In Electromagnetics Research Letters, Vol. 24, 9-16, 2011.
doi:10.2528/PIERL11041406

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