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Progress In Electromagnetics Research Letters
ISSN: 1937-6480
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WIDEBAND DIFFERENTIAL PHASE SHIFTER USING MICROSTRIP NONUNIFORM TRANSMISSION LINES

By M. Khalaj-Amirhosseini

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Abstract:
A new structure is proposed for wideband differential phase shifter. The proposed structure consists of a microstrip Nonuniform Transmission Line (NTL) and a microstrip Uniform Transmission Line (UTL). To optimally design the NTL, its strip width is expanded in a truncated Fourier series, firstly. Then, the optimum values of the coefficients of the series are obtained through an optimization approach to have low phase shift error and low reflection coefficient in desired frequency bandwidth. The usefulness of the proposed structure is studied using two examples.

Citation:
M. Khalaj-Amirhosseini, "Wideband Differential Phase Shifter Using Microstrip Nonuniform Transmission Lines," Progress In Electromagnetics Research Letters, Vol. 3, 151-160, 2008.
doi:10.2528/PIERL08031603

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