Compact dual-mode elliptic-function bandpass filter using a single ring resonator with one coupling gap

2000 ◽  
Vol 36 (19) ◽  
pp. 1626 ◽  
Author(s):  
Lung-Hwa Hsieh ◽  
Kai Chang
Keyword(s):  
Elliptic Function ◽  
Bandpass Filter ◽  
Ring Resonator ◽  
Dual Mode ◽  
Single Ring

Design and Analysis of Dual-Mode Double-Ring Resonator for Dual-Band Bandpass Filter Applications

2013 ◽  
Vol 321-324 ◽  
pp. 376-382
Author(s):  
Ming Wei Hsu ◽  
Man Long Her ◽  
Wen Ko ◽  
Yu Lin Wang
Keyword(s):  
Bandpass Filter ◽  
Ring Resonator ◽  
Relative Dielectric Constant ◽  
Capacitive Coupling ◽  
Ring Resonators ◽  
Dual Band ◽  
Center Frequency ◽  
Dual Mode ◽  
Double Ring ◽  
Single Ring

In this paper, two types of miniaturized dual-mode bandpass filters (BPF), a single-ring (SR) resonator, and a double-ring (DR) resonator are developed. By applying the capacitive-coupling technique to a dual-mode ring filter, a technique is proposed to miniaturize the dual-mode double-ring filter. An adjustable dual-band bandpass filter is achieved by developing a ring resonator where the two modes are capacitively coupled. Control of the filter center frequency is determined by the diameter of the ring and by the rings annular width. Filter coupling amount can also be adjusted by disturbance (perturbation) of an open stub attached to the annular disc. Proposed filters explore both single- and double-ring architectures. A single-ring resonator acting as a dual bandpass filter to allow 3.8 GHz and 7.8 GHz single is developed. A double-ring resonator to allow 2.05 GHz and 3.9 GHz signals is also developed. The ring resonators are fabricated on RO-4003 substrate, with relative dielectric constant of 3.38, thickness of 0.8 mm, and dielectric loss tangent of 0.0025. Results indicate the filters can be applied in the communications field.

scholarly journals A Novel Dual-Mode Dual-Band Bandpass Filter Based on a Single Ring Resonator

2020 ◽  
Vol 20 (2) ◽  
pp. 91-95
Author(s):  
Youngje Sung
Keyword(s):  
Resonant Frequency ◽  
Circular Hole ◽  
Bandpass Filter ◽  
Ring Resonator ◽  
Dual Band ◽  
Mode Structure ◽  
Dual Mode ◽  
Band Filter ◽  
Single Ring ◽  
Mode Characteristic

In this paper, a dual-mode bandpass filter that operates in two different bands is proposed. A circular patch with a small circular hole is set as the basic resonator, and, as the circular hole moves, the linewidth of the ring resonator becomes non-uniform. Consequently, the ring resonator is structurally asymmetric and exhibits a dual-mode characteristic. A gap is formed in the middle of the resonator, a pair of inductors and capacitors is applied to the gap, and the proposed dual-mode structure operates as a dual-band filter. The first resonant frequency <i>f</i><sub>1</sub> is determined by the inductor and capacitor values, and the second resonant frequency <i>f</i><sub>2</sub> is determined by the capacitor values. In addition, the frequency ratio (<i>f</i><sub>2</sub>/<i>f</i><sub>1</sub>) can be adjusted by an appropriate combination of inductor and capacitor values.

Dual-mode stepped-impedance ring resonator for bandpass filter applications

2001 ◽  
Vol 49 (7) ◽  
pp. 1235-1240 ◽  
Author(s):  
M. Matsuo ◽  
H. Yabuki ◽  
M. Makimoto
Keyword(s):  
Bandpass Filter ◽  
Ring Resonator ◽  
Dual Mode
Sign in / Sign up

Export Citation Format

Share Document