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PROPAGATION AND RADIATION CHARACTERISTICS OF MULTILAYER COUPLED-LINE BANDPASS FILTERS USING CONDUCTOR-BACKED COPLANAR TRANSMISSION LINES

By C.-J. Kuo, C.-Y. Liou, and S.-G. Mao

Full Article PDF (355 KB)

Abstract:
This paper presents the analytical design formulas for the bandpass filters which are built on the asymmetrically coupled-line conductor-backed coplanar transmission lines (CBCTLs) in multilayer configuration. The full-wave simulation is employed to characterize the far-field patterns of space-wave and surface-wave radiations as well as the frequency-dependent conductor, dielectric, and radiation losses. Good agreement among the results of full-wave simulation, transmission-line model, and measurement justifies the design procedure and validates the analytical design formulas. By properly placing the dielectric materials in multilayer configuration, a bandpass filter for minimizing the radiated power loss and improving the stopband characteristic can be achieved.

Citation:
C.-J. Kuo, C.-Y. Liou, and S.-G. Mao, "Propagation and Radiation Characteristics of Multilayer Coupled-Line Bandpass Filters Using Conductor-Backed Coplanar Transmission Lines," Progress In Electromagnetics Research C, Vol. 58, 21-31, 2015.
doi:10.2528/PIERC15022703

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