Compact Tunable Bandpass Filter With Wide Tuning Range of Centre Frequency and Bandwidth Using Short Coupled Lines

Zhang, Gang; Xu, Yanhui; Wang, Xuedao

doi:10.1109/access.2017.2786296

Cited by 28 publications

(19 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, it has the potential to notably reduce the complexity of reconfigurable communication systems . So far, several configurations and structures have been proposed in literature to design reconfigurable BPFs focusing on center frequency tuning with a constant bandwidths . However, as discussed in Refs.…”

Section: Introductionmentioning

confidence: 99%

“…3 So far, several configurations and structures have been proposed in literature to design reconfigurable BPFs focusing on center frequency tuning with a constant bandwidths. [4][5][6][7] However, as discussed in Refs. 8 and 9 , most of these filters are enough difficult to be integrated due to their large semiconductor area, that are unsuitable for compact systems.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

RF and microwave reconfigurable bandpass filter design using optimized active inductor circuit

Hammadi

Haddad

Saad

et al. 2018

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

In this article, a design methodology of an active bandpass filter (BPF) using tunable active inductor (TAI) achieving wide frequency contiguous tuning range (FTR) is presented. The tunable BPF is realized with a differential TAI (DTAI) employing two‐reconfiguration mechanisms one for coarse‐tuning using a controllable current source while the fine‐tuning is performed through a variable feedback resistance. The center frequency tuning is performed through the variation of the DTAI control voltages. A cross‐coupled pair based negative resistance technique is also applied to compensate the resistive losses of equivalent RLC resonator. The filter performances are significantly improved using several optimization techniques such as voltage scaling and multigate finger techniques. The proposed BPF is simulated using 0.13 μm CMOS technology. The filter achieves an insertion loss (IL) of 26.62‐33.45 dB over the tuning range 1.16‐3.27 GHz with a relative bandwidth of 1.3%‐3.4%. The noise figure and input 1‐dB compression point at 1.84 GHz are 14.93 dB and 2.72 dBm, respectively. The designed RF filter consumes an average power of 5 mW at 1 V supply voltage.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

RF and microwave reconfigurable bandpass filter design using optimized active inductor circuit

Hammadi

Haddad

Saad

et al. 2018

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

show abstract

“…These filters are regarded as a proper solution for the lack of spectrum resources due to their characteristic which is suitable for the multiband RF front end. There are several researchers put their emphasis on achieving a wide center frequency (CF) tuning range . However, several drawbacks can still be observed in their designs, including an uncontrollable bandwidth (BW), too many varactors, and an insufficient CF tuning range.…”

Section: Introductionmentioning

confidence: 99%

“…There are several researchers put their emphasis on achieving a wide center frequency (CF) tuning range. [1][2][3][4][5] However, several drawbacks can still be observed in their designs, including an uncontrollable bandwidth (BW), too many varactors, and an insufficient CF tuning range.…”

Section: Introductionmentioning

confidence: 99%

A 0.61‐2.39 GHz fully tunable bandpass filter with minimum number of loaded varactors

Lan

Guo

et al. 2018

Micro & Optical Tech Letters

View full text Add to dashboard Cite

A 2‐pole fully tunable bandpass filter (BPF) with only two varactors implemented is proposed in this paper. The ultra‐wide center frequency (CF) tuning range is built on short‐ended stepped‐impedance resonators (SIRs). Two varactors are placed at the symmetrical plane of the filter in series and shunt configurations, according to the odd‐even mode analysis the CF and bandwidth (BW) of the passband can be tuned independently without adding any redundant tuning elements. The CF of the proposed filter can be tuned from 0.61 to 2.39 GHz. The 3 dB BW tuning range is 150‐260 MHz at the lower side and 290‐520 MHz at the upper side of the entire passband tuning range. Good agreement is observed between simulated and measured results.

show abstract

“…The tunable filters in this type had the advantages of compact size and low cost, but it was very difficult for the resonators to be combined to achieve better suppression performance. The second type was the tunable filters realized through inserting a tunable device in the coupling structure of the traditional tunable filters to achieve a tunable coupling . The tunable filter in this type can be combined to improve the out‐of‐band suppression performance, but the design complexity, the insertion loss, and size of the inter‐cavities coupling structure was increased.…”

Section: Introductionmentioning

confidence: 99%

A widely tunable bandpass filter adopting novel fully tunable resonators

Zhang

Zhao²,

et al. 2018

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

A widely tunable bandpass filter adopting a novel fully tunable resonator is proposed in this letter. The fully tunable resonator is mainly consisted of an open ring, a frequency tuning structure, and a coupling tuning structure. Adopting the fully resonators, the center frequency, the input/output external Q value, and the coupling coefficients can be tuned at the same time. And the tuning range of a tunable filter adopting the novel fully tunable resonators can be expanded. The fully tunable resonators can be combined to achieve more excellent suppression performance. A widely tunable bandpass filter consisted of five fully tunable resonators with 86.5% frequency tuning range is designed, fabricated, and measured. The simulated results are in good agreement with the measured ones. K E Y W O R D S coupling tuning structure, fully tunable resonators, more excellent suppression, open ring, widely tunable filter

show abstract

Compact Tunable Bandpass Filter With Wide Tuning Range of Centre Frequency and Bandwidth Using Short Coupled Lines

Cited by 28 publications

References 38 publications

RF and microwave reconfigurable bandpass filter design using optimized active inductor circuit

RF and microwave reconfigurable bandpass filter design using optimized active inductor circuit

A 0.61‐2.39 GHz fully tunable bandpass filter with minimum number of loaded varactors

A widely tunable bandpass filter adopting novel fully tunable resonators

Contact Info

Product

Resources

About