A dual-mode dual-band bandpass filter using a single ring resonator

2009 ◽  
Author(s):  
Sha Luo ◽  
Lei Zhu ◽  
Sheng Sun
Keyword(s):  
Bandpass Filter ◽  
Ring Resonator ◽  
Dual Band ◽  
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-Band High-Temperature Superconducting Bandpass Filter Using Dual-Mode Hairpin Ring Resonator

2016 ◽  
Vol 26 (7) ◽  
pp. 1-4 ◽  
Author(s):  
Haiwen Liu ◽  
Baoping Ren ◽  
Fan Liu ◽  
Xuehui Guan ◽  
Pin Wen ◽  
...  
Keyword(s):  
High Temperature ◽  
Bandpass Filter ◽  
Ring Resonator ◽  
Dual Band ◽  
Dual Mode ◽  
High Temperature Superconducting

scholarly journals A miniature fractal-based dual-mode dual-band microstrip bandpass filter design

2014 ◽  
Vol 7 (2) ◽  
pp. 127-133 ◽  
Author(s):  
Mushtaq Alqaisy ◽  
Chandan Chakrabraty ◽  
Jawad Ali ◽  
Adam R.H. Alhawari
Keyword(s):  
Bandpass Filter ◽  
Ring Resonator ◽  
Filter Design ◽  
Ground Plane ◽  
Split Ring Resonator ◽  
Dual Band ◽  
Defected Ground Structure ◽  
Dual Mode ◽  
Split Ring ◽  
Compact Size

In this paper, a fractal-based complementary split-ring resonator (CSRR) has been introduced as a defected ground structure (DGS) in the ground plane of a dual-mode microstrip bandpass filter to produce a new compact filter with dual-band response. The conventional double square ring resonator structure is modified such that its inner ring is made with a fractal shape instead of a square. Measured and simulation results show that the resulting filter offers a dual passband response; the higher passband is attributed to the dual-mode microstrip ring structure, whereas the lower passband is as a result of the embedded CSRR DGS structure. In addition, the results show that the position of the lower passband could be varied, to a certain extent, without affecting the position of the higher passband by applying higher fractal iteration levels to the inner split ring. These features, together with the compact size the proposed filter offers, make it suitable for use in a wide variety of dual-band communication applications. Measured results, carried out on filter prototypes, have been found in agreement with those theoretically predicted.

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