UWB bandpass filter with two notch-bands based on SCRLH resonator

Feng, Wei; Gao, Chang; Liu, B.; Zhang, H.-W.; Shi, Xian‐Qing

doi:10.1049/el.2010.1743

Cited by 16 publications

(6 citation statements)

References 5 publications

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“…The SCRLH SRCLH structure is composed of two patches of large width ( a × b ), a line placed vertically ( c × d ), a line placed horizontally ( e × f ), and a via. The two wide patches are in an H‐shape, connected by the line, and are connected to the GND through the horizontal line and the via [17]. Based on the SCRLH notch filter, the proposed structure is designed.…”

Section: Quad Band‐notched Resonatormentioning

confidence: 99%

Quad band‐notched ultrawideband antenna with a modified H‐shaped resonator

Sung

2013

IET Microwaves, Antennas & Propagation

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In this study, a novel planar ultrawideband antenna, with a quad band‐notched function, is investigated. The proposed antenna consists of a circular‐shaped radiating element, a 50 Ω microstrip feed line, a modified H‐shaped resonator, and a partially truncated ground plane. The proposed H‐shaped resonator, with quadruple resonance characteristics, is realised without any change in its size but instead, by modifying the simplified composite right/left‐handed resonator with dual resonance characteristics. By embedding the modified H‐shaped resonator beside the microstrip feedline, band‐rejected filtering properties in the wireless local area network /worldwide interoperability for microwave access bands are generated. By changing the modified H‐shaped resonator's dimensions, the proposed antenna shows variable quadplex‐filtering characteristics, such as band‐notch frequency and its bandwidth. The measured results show that the proposed antenna design exhibits a 10 dB return loss bandwidth from 2.12 to 13.63 GHz, excluding the rejection bands. Very sharp notch and high band‐rejection are achieved, and relatively stable omnidirectional radiation performance over the entire frequency range is also obtained.

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Section: Quad Band‐notched Resonatormentioning

confidence: 99%

Quad band‐notched ultrawideband antenna with a modified H‐shaped resonator

Sung

2013

IET Microwaves, Antennas & Propagation

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“…Another way to realize microwave filter includes modifying the transmission line as a resonator circuit or placing resonator near to the transmission line. In this fashion, microstrip inter digital resonators (IDRs), square ring loaded resonators (SRLRs), step‐impedance resonators (SIRs), split ring resonators (SRRs), parallel coupled line resonators, patch resonators and ring resonators have been used for realization of resonator based filter. Besides these, planar RF/microwave filters with high selectivity can be realized through substrate integrated waveguides (SIWs).…”

Section: Introductionmentioning

confidence: 99%

Filtennas for wireless application: A review

Mishra

Lalitha

2019

Int J RF Microw Comput Aided Eng

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In recent year, various filtenna circuits have been developed satisfying the objectives and prerequisites of wireless communication. Some of these developed designs are new or some are the improved version of previous works whereas the others are the combination of conventional methods. This article presents the review of filtenna circuits starting from the beginning to the improvements until date. This article starts with brief overview of various filters with their design strategies and ends in its implementation in filtenna designs followed by discussion on several filtenna designs in term of size and overall performances. Among various designs, bandpass, and bandstop filters are extensively used in filtenna realization as it provides a better selectivity in desired band. Various planar filtenna circuits, based on either defected ground structure (DGS) or resonator or SIW filters are reviewed and presented. Besides, planar filtennas, these filters are also integrated to the aperture of horn antennas for the realization of horn filtennas, applicable for high frequency operations. It is observed that SIW based filtennas exhibited narrow impedance bandwidth. This feature can be improved by doubling substrate layer as well as the number of metallic ways. Whereas, resonator based filtennas use resonator based filters along with DGSs to enhance impedance bandwidth as well as minimize mutual coupling and cross‐polar radiation. Apart from single element filtenna, filtenna arrays, and reconfigurable filtennas (including planar and horn reconfigurable filtennas) are presented. This review article may be helpful for beginners working on filtenna circuits and also such a review process is not available in the open literature to the best of author's knowledge.

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“…Second, the proposed resonators can realise excellent stopband performance. Compared with the common methods employing DGS or stubs as low-pass filters to improve stopband performance [23,24], which is usually accompanied by disturbance of the signal integrity on the ground plane or an increased size, the DMS based resonators can mitigate those drawbacks effectively.…”

Section: Introductionmentioning

confidence: 99%

Design of multi‐band bandpass filters based on stub loaded stepped‐impedance resonator with defected microstrip structure

Wei

Qin

Guo

et al. 2016

IET Microwaves, Antennas & Propagation

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The design of multi‐band bandpass filters (BPFs) employing stub loaded stepped‐impedance resonator with defected microstrip structure (SL‐SIR‐DMS) is presented in this study for the first time. The proposed SL‐SIR‐DMS is created by embedding DMS on the low‐impedance line of the SL‐SIR. It is found that different defected structures can lead to different frequency responses. In addition, by using DMS, tri‐band and even quad‐band responses can be easily achieved without increasing the resonator size. As verification, one tri‐band SL‐SIR‐DMS and one quad‐band SL‐SIR‐DMS are designed and analysed using even/odd‐mode method. Subsequently, one tri‐band BPF and one quad‐band BPF have been developed with pseudo‐interdigital coupling to realise good out‐of‐band performance. The predicted results are compared with measured ones and good agreement is achieved. Compared with BPFs using only SL‐SIR, the proposed filters with DMS are more compact due to the slow‐wave characteristic. Compared with the BPFs using defected ground structure to improve the stopband performance, the proposed ones can realise comparable wide stopbands but maintaining the signal integrity on the ground plane for packaging purpose.

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UWB bandpass filter with two notch-bands based on SCRLH resonator

Cited by 16 publications

References 5 publications

Quad band‐notched ultrawideband antenna with a modified H‐shaped resonator

Quad band‐notched ultrawideband antenna with a modified H‐shaped resonator

Filtennas for wireless application: A review

Design of multi‐band bandpass filters based on stub loaded stepped‐impedance resonator with defected microstrip structure

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