A Microstrip Phase Shifter Design Using a Switch-Loaded Ground Plate

Dowon KIM  Moonil KIM  

Publication
IEICE TRANSACTIONS on Communications   Vol.E89-B   No.6   pp.1873-1875
Publication Date: 2006/06/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.6.1873
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Devices/Circuits for Communications
Keyword: 
reconfigurable ground plane,  microstrip phase shifter,  electromagnetic bandgap,  

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Summary: 
A microstrip phase shifter design that uses a reconfigurable metal pattern on the EBG ground plate is introduced. The EBG ground plate metal pattern contains a linear array of thin slots with switching devices loaded at the center. This design can vary the phase constant with minimum mismatch loss over a large frequency bandwidth. Several test ground plates without actual switching devices were used to verify the design concept.