Sharp-Rejection Wide-Band Dual-Band Bandpass Planar Filters With Broadly-Separated Passbands

Sánchez-Soriano, Miguel Á.; Gómez‐García, Roberto

doi:10.1109/lmwc.2014.2382669

Cited by 30 publications

(25 citation statements)

References 8 publications

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“…Ever-increasing demand for compact wireless transceivers continues to impact the field of microwave and radio frequency communication. 1,2 One of the most important modules in such systems is the filter, [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] and its performance dominates the whole wireless communication system.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, in-band and out-of-band performance of the proposed filters is further enhanced by novel structures. To the best of authors' knowledge, these structures realize for the first time dual wideband and wide stop band resulting from the restriction of high order harmonic frequencies at the same time in dual wideband 8,10,11,[13][14][15] and asymmetric SIR filters. [3][4][5][6][7] Moreover, the proposed structures use the capacitive coupling of only two miniaturized resonators to realize dual-wideband and quad-wideband responses without such extra structures such as via holes or defected ground planes, and so are unique among dual-wideband and quadwideband filters.…”

Section: Introductionmentioning

confidence: 99%

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New multi‐standard dual‐wideband and quad‐wideband asymmetric step impedance resonator filters with wide stop band restriction

Al‐Yasir

Parchin

et al. 2019

Int J RF Microw Comput Aided Eng

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New multi‐standard wide band filters with compact sizes are designed for wireless communication devices. The proposed structures realize dual‐wideband and quad‐wideband characteristics by using a new skew‐symmetrical coupled pair of asymmetric stepped impedance resonators, combined with other structures. The first and second dual‐wideband filters realize fractional bandwidths (FBW) of 43.2%/31.9% at the central frequencies (CF) of 1.875/1.63 GHz, and second bandwidths of 580 MHz/1.75 GHz at CF of 5.52/4.46 GHz, respectively. The proposed quad‐band filter realizes its first/second/third/fourth pass bands at CF 2.13/5.25/7.685/9.31 GHz with FBW of 46.0%/11.4%/4.6% and 5.4%, respectively. The wide pass bands are attributed to the mutual coupling of the modified ASIR resonators and their bandwidths are controllable by tuning relative parameters while the wide stop band performance is optimized by the novel interdigital cross coupled line structure and parallel uncoupled microstrip line structure. Moreover, the quad band is generated by introducing the novel defected rectangle structure. These multi‐standard filters are simulated, fabricated and measured, and measured results agree well with both simulated results and theory predictions. The good in‐band and out‐of‐band performances, the miniaturized sizes and simple structures of the proposed filters make them very promising for applications in future multi‐standard wireless communication.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New multi‐standard dual‐wideband and quad‐wideband asymmetric step impedance resonator filters with wide stop band restriction

Al‐Yasir

Parchin

et al. 2019

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

show abstract

“…With the rapid growth of multi‐standard wireless communication services, multi‐band communication devices such as filters are strongly required to develop wireless communication systems . A number of works have been reported on dual‐band (DB) RF and microwave filters . However, some of them suffer from relatively large configurations such as the DB stripline filter designed in ref.…”

Section: Introductionmentioning

confidence: 99%

Compact dual‐band bandpass filters with stub resonating lines

Safia¹,

Nedil²,

Yagoub

et al. 2017

Micro & Optical Tech Letters

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Several new compact microstrip dual‐band bandpass filters using admittance inverters and open‐ended resonating stubs are introduced. Operating at the center‐band frequencies of 1.8 and 2.4 GHz, with moderate bandwidth passbands, the proposed devices are suitable for LTE mobile cellular networks and Wi‐Fi technologies. The design procedure includes the use of simple equations to extract the lumped element values of the circuit model. Next, the equivalent distributed layout which consists of 3 admittance inverters and 4 shunt‐connected stubs (two λg/2 and two λg/2) is presented. The design is adjusted to attain further enhancement in the electrical and physical characteristics. These include spurious passband suppression, layout miniaturization, and reduction in the capacitive coupling between stubs. Measured responses are compared with simulated results, and very good agreement is observed. These features make the proposed filters suitable for integration into various microwave planar technologies.

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“…In order to obtain wideband, multi-mode resonators (MMRs) [1][2][3][4][5]7] have been extensively studied to address the requirements. These BPFs using a single resonator have the merit of compact size.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the two passbands are closely spaced. Two cascading transversal filtering sections (TFSs) based on directional couplers in [7] are used to realize broadly-separated wide dual-passband. A slotted ground structure in [9] is applied to even broaden the dual passbands, while the structure is difficult to integrate.…”

Section: Introductionmentioning

confidence: 99%

Dual-Wideband Bandpass Filter Using Open and Shorted Stubs Loaded Ring Resonator

Yang¹,

Jiao²,

Zhang³

et al. 2016

PIER Letters

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Abstract-This letter presents a dual-wideband bandpass filter (BPF) by using open and shorted stubs loaded ring resonator. The resonator can excite multiple resonant modes. The transmission zeros (TZs) analyzed by the transversal signal interference concepts can divide the resonant modes into two groups that form dual-wide passband. The even-mode resonant frequencies can be controlled by the stubs parameters, and the TZs can be tuned by the port angle independently. So the center frequency (CF) and the bandwidth of each passband can be flexibly controlled. An experimental dual-wideband BPF with CF of 1.48/5.7 GHz and 3 dB FBW of 137.8%/49.3% is implemented, and the experimental results are presented for validation.

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Sharp-Rejection Wide-Band Dual-Band Bandpass Planar Filters With Broadly-Separated Passbands

Cited by 30 publications

References 8 publications

New multi‐standard dual‐wideband and quad‐wideband asymmetric step impedance resonator filters with wide stop band restriction

New multi‐standard dual‐wideband and quad‐wideband asymmetric step impedance resonator filters with wide stop band restriction

Compact dual‐band bandpass filters with stub resonating lines

Dual-Wideband Bandpass Filter Using Open and Shorted Stubs Loaded Ring Resonator

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