Design of Tri-Band Filter Based on Stub Loaded Resonator and DGS Resonator

Lai, Xin; Chen, Liang; Di, Hao; Wu, Bian

doi:10.1109/lmwc.2010.2045584

Cited by 132 publications

(102 citation statements)

References 12 publications

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“…For tri-band BPF designs, a typical method is to use stepped-impedance resonator (SIR) [2][3][4] and stub-loaded resonator (SLR) [5][6][7]. In [2,3], a pair of asymmetric SIRs with parallel coupling arrangement was proposed to obtain the tri-band responses.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a multimode SIR with 0 • tapped-feed structure arrangement was proposed to achieve the tri-band responses [4]. Stub-loaded impedance resonator can also be used to design tri-band BPFs [5][6][7]. In [5], the resonant behavior of the stub-loaded SIR is analyzed, and after properly giving the impedance ratio and length ratio of the stub-loaded SIR, the required tri-band filter is obtained.…”

Section: Introductionmentioning

confidence: 99%

“…In [5], the resonant behavior of the stub-loaded SIR is analyzed, and after properly giving the impedance ratio and length ratio of the stub-loaded SIR, the required tri-band filter is obtained. In [6], a tri-band filter design is proposed where the DGS-based resonators result in first passband, and stub-loaded resonators contribute to the second and third bands. Different from other stub-loaded resonators, in [7], a tri-band BPF utilized a shortended main transmission line and a centerly-loaded open stub.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Compact and High Selectivity Tri-Band Bandpass Filter Using Multipath-Embedded Resonators

Yang¹,

Wu²,

Zhu³

et al. 2014

PIER Letters

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Abstract-In this paper, a novel compact tri-band bandpass filter (BPF) with compact circuit size and high passband selectivity has been presented and implemented using multipath-embedded resonator (MER). This filter includes two multipath-embedded stepped impedance resonators (SIRs), connected with stub-coupling at the symmetric plane. By tuning admittance ratio and length ratio of the multipath-embedded resonator, it can be designed at 1.84, 2.45, 3.05 GHz. Through internal edgecoupling and extemal zero-degree feed lines, a tri-band BPF can be achieved with compact circuit size, high passband selectivity and low insertion loss. The measured results validate the full-wave EM simulated results with good agreement.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Compact and High Selectivity Tri-Band Bandpass Filter Using Multipath-Embedded Resonators

Yang¹,

Wu²,

Zhu³

et al. 2014

PIER Letters

Self Cite

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“…Currently, with the rapid development of modern wireless communications, bandpass filters with dual-band [1][2][3][4][5][6][7] and tri-band [8][9][10] even quad-band [11] operation become more and more important in communication systems for the multifunctional and miniaturization requirement of portable equipment. The traditional microstrip parallel-coupled halfwavelength resonator bandpass filters have narrow stopband between the fundamental response and the first spurious response, so the stepped-impedance resonator (SIR) [6][7][8] was presented in the past years not only to restrain the spurious responses, but also to shorten the resonator size.…”

Section: Introductionmentioning

confidence: 99%

Compact Split Ring Sir Bandpass Filters With Dual and Tri-Band

Xiao

Zhu²

2012

PIER C

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Abstract-Multi-band microwave filters are important for multifunctional and miniaturization requirement of portable communication equipment. In this paper, tri-section split ring stepped-impedance resonator is analyzed, and new compact dual-band and tri-band bandpass filters are proposed by using split ring stepped-impedance resonators, and the designs are demonstrated by measurement. The new dualband filters operate at about 2.4 and 5.5 GHz which meet IEEE 802.11 application requirements, and the new tri-band filters operate at about 2.4-2.6, 3.3-3.6 and 5.2-5.6 GHz, and filter sizes are greatly reduced compared with relative reports. The designed filters have advantages of compact and miniature structures, low passband insertion losses and good frequency selectivity, all these have prospect to be applied in wireless communication systems.

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“…Therefore, dual-mode resonators with flexible feeding schemes are highly desired. DGS resonators, on the other hand, have advantages in design flexibility and have been used in the design of bandpass filters [17,19], multi-band bandpass filters [20,21], lowpass filters [22,23] and bandstop filters [24] successfully. However, they are only single-mode resonators, which result in a large circuit size.…”

Section: Introductionmentioning

confidence: 99%

Compact Dual-Mode DGS Resonators and Filters

Wang¹,

Bo-ran²

2011

PIER Letters

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Abstract-A novel and compact dual-mode defected ground structure (DGS) resonator is presented. Distinct characteristics of the proposed resonator are investigated. Using this type of resonator, a bandpass filter with the center frequency of 2.38 GHz and the fractional bandwidth of 6.7% is simulated and fabricated. The results show that this filter not only has an inherent transmission zero near the passband, but also has a very wide upper stopband with rejection better than 20 dB up to about 12 GHz.

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Design of Tri-Band Filter Based on Stub Loaded Resonator and DGS Resonator

Cited by 132 publications

References 12 publications

Compact and High Selectivity Tri-Band Bandpass Filter Using Multipath-Embedded Resonators

Compact and High Selectivity Tri-Band Bandpass Filter Using Multipath-Embedded Resonators

Compact Split Ring Sir Bandpass Filters With Dual and Tri-Band

Compact Dual-Mode DGS Resonators and Filters

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