Compact bandpass filter with a sharp roll-off response using multi-path coupling scheme of H-shaped resonator

2012 ◽  
Author(s):  
Masataka Ohira ◽  
Zhewang Ma
Keyword(s):  
Bandpass Filter ◽  
Coupling Scheme ◽  
Path Coupling

A Hybrid Low-Cost Bandpass Filter With SAW Resonators and External Lumped Inductors Using a Dual-Coupling Scheme

2020 ◽  
Vol 68 (6) ◽  
pp. 2289-2299 ◽  
Author(s):  
Runqi Zhang ◽  
Mahmoud Abdelfattah ◽  
Li Yang ◽  
Roberto Gomez-Garcia ◽  
Dimitrios Peroulis
Keyword(s):  
Bandpass Filter ◽  
Low Cost ◽  
Coupling Scheme ◽  
Saw Resonators

scholarly journals A Three-Pole Substrate Integrated Waveguide Bandpass Filter Using New Coupling Scheme

2015 ◽  
Vol 24 (3) ◽  
pp. 703-707 ◽  
Author(s):  
X. Guan ◽  
Y. Yuan ◽  
H. Liu ◽  
W. Huang
Keyword(s):  
Bandpass Filter ◽  
Coupling Scheme ◽  
Substrate Integrated Waveguide

scholarly journals A Novel Magnetic Coupling for Miniaturized Bandpass Filters in Embedded Coaxial SIW

2019 ◽  
Vol 9 (3) ◽  
pp. 394 ◽  
Author(s):  
Stefano Sirci ◽  
Jorge Martínez ◽  
Vicente Boria
Keyword(s):  
Bandpass Filter ◽  
Stop Band ◽  
Magnetic Coupling ◽  
Coupling Scheme ◽  
Fractional Bandwidth ◽  
Compact Size ◽  
Free Band ◽  
Magnetic Couplings ◽  
L Band ◽  
Easy Integration

In this paper, embedded coaxial substrate integrated waveguide (CSIW) filters with innovative magnetic couplings are presented and studied. By creating the loading capacitance of a combline topology using inner layers of a low-temperature co-fired ceramic (LTCC) stack-up, it is possible to achieve resonator miniaturization while improving the spurious-free band and providing full-packaged solutions. Moreover, a new magnetic coupling scheme consisting of short-ended stripline probes is proposed and analyzed in detail, both for direct and external couplings. An in-line three-pole filter at L-band is designed, manufactured, and measured proving how the proposed approach can be used for designing wideband bandpass filter (BPF) with extremely compact size. The designed BPF is centered at 1.5 GHz with 10 % fractional bandwidth (FBW), while the layout size is just 35 × 9.5 mm 2 . The experimental results validate the coaxial SIW technology that allows for, at the same time, easy integration, compact size, flexible design, and enhanced stop-band performance.

scholarly journals Transversely Compact Single-Ended and Balanced Bandpass Filters with Source–Load-Coupled Spurlines

Electronics ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 416 ◽  
Author(s):  
Fang Yan ◽  
Yong Mao Huang ◽  
Tao Huang ◽  
Shuai Ding ◽  
Kenian Wang ◽  
...  
Keyword(s):  
Bandpass Filter ◽  
Signal Transmission ◽  
Wireless Systems ◽  
Bandpass Filters ◽  
Coupling Scheme ◽  
Passive Components ◽  
Differential Signal ◽  
Transmission Zeros ◽  
Stepped Impedance Resonator ◽  
Good Agreement

Multi-function wireless systems demand multi-channel transmit/receive (TR) modules, particularly as multiple functions are required to operate simultaneously. In each channel, passive components, including bandpass filters, must be compact, or at least transversely compact; thus, the entire circuitry of the channel will be slender, and consequently multiple channels can be parallel-arranged conveniently. In this work, single-ended and balanced bandpass filters for multi-channel applications are presented. As a unique resonator, the U-shaped stepped impedance resonator (USIR) can achieve size miniaturization compared with its corresponding uniform impedance resonator (UIR) counterpart. Hence, with the utilization of USIRs, the proposed bandpass filters are able to acquire compact transverse sizes. Moreover, by using the source–load coupling scheme, two transmission zeros (TZs) are respectively generated at the lower and upper sides of the passbands, which is useful for improvement of the selectivity performance. In addition, spurlines are introduced at the input and output ports to produce another TZ to further enhance the stopband performance, which cannot be acquired by the UIR or stepped impedance resonator (SIR). To verify the aforementioned idea, one single-ended and one balanced bandpass filter are implemented, with experimental results in good agreement with the corresponding simulations. Meanwhile, as compared with some similar works, the proposed balanced filter achieves compact transverse size, sharp selectivity skirt, and wide stopbands up to the fourth-order harmonic with suppression over 20 dB, which illustrates its suitability for differential signal transmission application in microwave circuits and systems.

scholarly journals A Novel Triple-Mode Bandpass Filter Based on a Dual-Mode Defected Ground Structure Resonator and a Microstrip Resonator

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Xuehui Guan ◽  
Ye Yuan ◽  
Lan Song ◽  
Xiaoyan Wang ◽  
Jiuhuai Lei ◽  
...  
Keyword(s):  
Bandpass Filter ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Coupling Scheme ◽  
Area Network ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Dual Mode ◽  
Microstrip Resonator ◽  
Triple Mode

A novel triple-mode bandpass filter (BPF) using a dual-mode defected ground structure (DGS) resonator and a microstrip resonator is proposed in this paper. The dual-mode characteristic is achieved by loading a defected T-shaped stub to a uniform impedance DGS resonator. A uniform impedance microstrip resonator is designed on the top layer of the DGS resonator and a compact bandpass filter with three resonant modes in the passband can be achieved. A coupling scheme for the structure is given and the coupling matrix is synthesized. Based on the structure, a triple-mode BPF with central frequency of 2.57 GHz and equal ripple bandwidth of 15% is designed for the Wireless Local Area Network. Three transmission zeros are achieved at 1.48 GHz, 2.17 GHz, and 4.18 GHz, respectively, which improve the stopband characteristics of the filter. The proposed filter is fabricated and measured. Good agreements between measured results and simulated results verify the proposed structure well.

scholarly journals Design of Dual-Band Bandpass Filter Using Dual-Mode Defected Stub Loaded Resonator

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Dechang Huang ◽  
Zhaodi Huang
Keyword(s):  
Design Methodology ◽  
Bandpass Filter ◽  
Dual Band ◽  
Coupling Scheme ◽  
Dual Mode ◽  
Ansoft Hfss ◽  
Novel Approach ◽  
Resonant Modes ◽  
Good Agreement ◽  
Lower Frequencies

A novel approach for designing a dual-band bandpass filter (BPF) using defected stub loaded resonator (DSLR) is presented in this paper. The proposed DSLR consists of two fundamental resonant modes and some resonant characteristics have been investigated by EM software ofAnsoft HFSS. Then, based on two coupled DSLRs, a dual-band response BPF that operates at 2.4 GHz and 3.5 GHz is designed and implemented for WLAN and WIMAX application. The first passband is constructed by two lower frequencies of the coupled DSLRs and the second passband is produced by two higher ones; the coupling scheme of them is also given. Finally, the dual-band BPF is fabricated and measured; a good agreement between simulation and measurement is obtained, which verifies the validity of the design methodology.

Design of a Dual-Band Bandpass Filter Using Active Inductor Principle

2017 ◽  
Vol 7 (4) ◽  
pp. 342
Author(s):  
Imane Halkhams ◽  
Said Mazer ◽  
Mahmoud Mehdi ◽  
Moulhime El Bekkali ◽  
Wafae El Hamdani
Keyword(s):  
Bandpass Filter ◽  
Dual Band ◽  
Active Inductor

Design of Pseudo-Elliptical Wideband Bandpass Filter Using Stub Loaded Short-Circuited Parallel-Coupled Three-Line Units

2010 ◽  
Vol E93-C (7) ◽  
pp. 1022-1031 ◽  
Author(s):  
Chun-Ping CHEN ◽  
Junya TAKAHASHI ◽  
Zhewang MA ◽  
Tetsuo ANADA ◽  
Jui-Pang HSU
Keyword(s):  
Bandpass Filter
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