Dual‐mode double‐ring resonator for microstrip band‐pass filter design

Abstract

ABSTRACT:

Design of compact LTCC millimeter filters using two kinds of novel resonators

“…The inner ring related to the smaller ring decides the upper resonant frequencies, as well as the outer ring related to the larger ring represents the lower resonant frequencies. Thus, these two resonance frequencies with respect to the rings can be applied to determine the dual frequencies of the desired band as [3,4] (1) Obviously, this is an alternative approach to improve the performance of the conventional double mode ring resonator. When the double ring is constructed, the inner and outer rings can be parasite elements of each other.…”

“…One resonator is circular wire-patch resonator and the other is circular double ring resonator. The two resonators are discussed theoretical and experimental in the literature [3][4][5], the resonators have good electrical performances, including very compact dimensions and the possibility of high integration in multilayer low-temperature co-fired ceramic modules. The two resonators are exploited to design the multilayer LTCC millimeter wave filter.…”

A New Small Size Non-degenerate Dual-mode Patch Filter

“…The use of planar degenerate dual-mode resonators for bandpass filters applications was firstly proposed by Wolff [5]. A dualmode microstrip filter can be designed using degenerate modes [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] or non-degenerate modes [20,21]. Degenerate modes based filters have been investigated in various topologies such as square patch [6], circular patch [7], triangular patch [8,9], microstrip loop [10][11][12][13], circular ring [14][15][16], and meander shape [17][18][19].…”

CPW‐fed dual‐mode double‐ring resonators with Butterworth approximations for band‐pass filter applications

“…Based on the DMRR, double ring configuration and TM 210 voltage/current couplings techniques, the DMDRR was recently constructed in experiments [11][12]. Thus, both TM 110 and TM 210 modes were used for applications.…”