Fourth-order tri-band bandpass filter using square ring loaded resonators

Chen, J.-Z.; Wang, N.; He, Yejun; Chen, Liang

doi:10.1049/el.2010.3724

Cited by 59 publications

(44 citation statements)

References 5 publications

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“…This structure is simple and flexible for blocking undesired narrow band radio signals that may appear in UWB band. The concept of the square ring loaded resonator (SRLR) has been extensively studied to develop various types of microwave devices [24]. It consists of two open folded microstrip lines and a square ring.…”

Section: Square Ring Short Stub Loaded Resonator (Srsslr) Analysismentioning

confidence: 99%

Compact Microstrip Uwb Bandpass Filter With Triple-Notched Bands

Zhao¹,

Wang²,

Li³

2013

PIER C

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Abstract-A new microstrip ultra-wideband (UWB) bandpass filter (BPF) with triple-notched bands is presented in this paper. The circuit topology and its corresponding electrical parameters of the initial microstrip UWB BPF are desired by a variation of genetic algorithm (VGA). Then, triple-notched bands inside the UWB passband are implemented by coupling a square ring short stub loaded resonator (SRSSLR) to the main transmission line of the initial microstrip UWB BPF. The triple-notched bands can be easily generated and set at any desired frequencies by varying the designed parameters of SRSSLR. For verification, a microstrip UWB BPF with triple-notched bands respectively centered at frequencies of 4.3 GHz, 5.8 GHz, and 8.1 GHz is designed and fabricated. Simulated and experimental results are in good agreement.

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Section: Square Ring Short Stub Loaded Resonator (Srsslr) Analysismentioning

confidence: 99%

Compact Microstrip Uwb Bandpass Filter With Triple-Notched Bands

Zhao¹,

Wang²,

Li³

2013

PIER C

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“…Furthermore, X-band satellite communication services (XSCS) from 7.25 to 8.395 GHz also operate in the UWB band. Therefore, it is necessary to design antennas with multiband filtering functionality to reject these unwanted interfering signals [6][7][8][9][10][11]. To achieve desired band-notched performance, a half-wavelength U-shaped slot structure is usually inserted on initial the UWB monopole antenna in [6], however, only one notched band is created.…”

Section: Introductionmentioning

confidence: 99%

“…In [8], two notched bands can also be obtained, and these antenna structures are very simple and easy to fabricate; however, they use two or three single-mode resonators. Then, the spurious notched bands obtained by spurious resonances of the conventional resonance structures [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

A New Compact Printed Triple Band-Notched Uwb Antenna

Wang¹

2016

PIER Letters

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Abstract-A novel planar ultra-wideband (UWB) antenna with triple-notched bands using triple-mode stub loaded resonator (SLR) is presented in this paper. The basic UWB antenna consists of a circularshaped radiating element, a 50 Ω microstrip feed line, and a partially truncated ground plane. Then, the resonance properties of the SLR are studied. Results reveal that the multiple-mode property of the SLR can be utilized in the UWB antenna design to achieve triple band-notched performance. To validate the design concept, a novel planar UWB monopole antenna with three notched bands respectively around the WiMAX band, WLAN band, and X-band satellite communication band is designed and fabricated. The results indicate that the proposed planar antenna not only retains an ultrawide bandwidth, but also owns triple band-rejections capability. The UWB antenna demonstrates omnidirectional radiation patterns across nearly whole operating bandwidth that is suitable for UWB communications.

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“…Because of the dependence on the resonant frequencies, the tri-section SIRs suffered from the design complexity, especially in the analysis of resonant frequencies. Recently, tri-band BPFs also could be constructed using a stub-loaded resonator (SLR) with defected ground structure (DGS) resonator [6] and square ring loaded resonator [7]. Nevertheless, the passband selectivity still needs to be improved with the help of several transmission zeros.…”

Section: Introductionmentioning

confidence: 99%

A novel planar tri-band bandpass filter using stub-loaded resonators

Tang

Lin

et al. 2016

IEICE Electron. Express

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This letter presents a novel planar tri-band bandpass filter (BPF) using a set of stepped-impedance resonators (SIRs) and a short-circuited stub-loaded uniform impedance resonator. The former is designed to operate at the first and third passbands and the latter at the second passband. Corresponding equivalent circuit is analyzed by using the even-odd mode theory. Skirt selectivity is obtained due to source-load coupling. For validation, a tri-band BPF with compact size is designed, fabricated, and measured, its center frequencies are located at 2.4, 3.5, 5.15 GHz. Measured results show good performance on insertion loss and return loss.

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Fourth-order tri-band bandpass filter using square ring loaded resonators

Cited by 59 publications

References 5 publications

Compact Microstrip Uwb Bandpass Filter With Triple-Notched Bands

Compact Microstrip Uwb Bandpass Filter With Triple-Notched Bands

A New Compact Printed Triple Band-Notched Uwb Antenna

A novel planar tri-band bandpass filter using stub-loaded resonators

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