Novel dual-mode DC-block triangular-patch bandpass filter.

A novel dual-mode DC-block bandpass filter (BPF) using a pair of V-shape slots on triangular-patch resonators is developed in this letter. The V-shape slots perturb the field distributions of triangular-patch resonators and excite degenerate modes. Compared to our previous research, the length of input/output (I/O) lines of the proposed filter is reduced so that the circuit becomes compact. Finally, the good agreement between the simulated and measured results of the proposed BPF is presented. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1648–1649, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22520 [ABSTRACT FROM AUTHOR]