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| Progress In Electromagnetics Research B | ISSN: 1937-6472 |
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WIDEBAND 180 DEGREE PHASE SHIFTER USING MICROSTRIP-CPW-MICROSTRIP TRANSITIONBy A. A. EldekAbstract: A microstrip 180o phase shifter obtained by a novel design of Microstrip-to-Coplanar Waveguide (CPW)-to-Microstrip transition is presented. The proposed phase shifter is obtained without changing the layer of the second microstrip line. Via holes are used to transfer the current from the top to the bottom substrate layer and vice versa. The presented phase shifter is operating in a wide bandwidth between 5.5 and 18 GHz, with low insertion loss and reflection coefficients. Because the input and output microstrip lines are on the same layer, the presented phase shifter is suitable for a modified class of feeding networks for phased antenna arrays.
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