Tri-band bandpass filter using stub loaded resonators

Chen, F.-c.; Chu, Qing‐Xin; Tu, Zhi‐Hong

doi:10.1049/el:20081054

Cited by 122 publications

(78 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the center frequencies of the three bands are dependent, which makes the design procedures complex. The second popular method is to use stub-loaded resonators [5][6][7][8][9][10][11][12]. In [5], tri-band responses are realized by open stubloaded resonators.…”

Section: Introductionmentioning

confidence: 99%

Design of Novel Compact Tri-Band Bandpass Filter With Controllable Frequencies and High Selectivity

Su¹

2014

PIER Letters

View full text Add to dashboard Cite

Abstract-This paper presents a compact tri-band bandpass filter (BPF) with high selectivity. The proposed filter utilizes novel stub-loaded quarter-wavelength resonators and conventional uniform quarter-wavelength resonators. The latter is embedded in the former, and they are separated by a feed line. Due to these quarter-wavelength resonators, the total size is greatly reduced. Moreover, the passband frequencies can be controlled individually. To enhance its selectivity, source-load coupling is employed. For demonstration, an experimental filter is implemented. High skirt selectivity and suppression levels are observed in the measured results. The circuit area of the filter is 0.17λ g × 0.19λ g , featuring compact size.

show abstract

Section: Introductionmentioning

confidence: 99%

Design of Novel Compact Tri-Band Bandpass Filter With Controllable Frequencies and High Selectivity

Su¹

2014

PIER Letters

View full text Add to dashboard Cite

show abstract

“…From then on, a multitude of improved bandpass filters based on SIRs have been developed [12][13][14][15][16][17]. Using the method of the odd-and even-mode analysis, the open or short stub-loaded resonators (SLRs) are another new and useful structures to design dual-band and even multi-band filters [18][19][20][21][22][23][24]. In [18], a dualband BPF using open stub-loaded resonator (OSLR) and 0 • feeding structure was first analyzed and designed.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the short stubloaded resonator (SSLR) was also analyzed in [19] for design of compact bandpass filter. In [22], a multi-mode multi-band filter using both short and open stub-loaded resonator was proposed to make the size more compact. Furthermore, a new tri-band filter with combined SIR and OSLR structures was analyzed and discussed [10].…”

Section: Introductionmentioning

confidence: 99%

Novel Design of a Compact Triple-Band Bandpass Filter Using Short Stub-Loaded Sirs and Embedded Sirs Structure

Zhang²,

Li³

et al. 2013

PIER

View full text Add to dashboard Cite

Abstract-A novel compact planar triple-band bandpass filter using two sets of short stub-loaded stepped impedance resonators (SSLSIRs) and a pair of embedded stepped impedance resonators (ESIRs) has been proposed. The SSLSIRs can adjust the bandwidths of the corresponding passbands over a wide range, and the ESIRs employing non 0 • -feed coupled structure with mixed electric and magnetic coupling can obtain an extra transmission zero. The embedded resonators structure can further miniaturize the dimensions of the whole triple-band filter. The operating frequencies of the SSLSIRs and ESIRs are designed for the applications of the WLAN (2.45/5.2 GHz) and WiMAX (3.5 GHz) systems, respectively. The simulated and measured results are both presented and show good agreement.

show abstract

“…Multi-band filters become quite popular. Therefore, they had been widely studied in several papers [2][3][4][5][6][7][8][9][10][11][12][13]. In [2], a tri-band filter was designed using three sets of resonators with a common feed circuit, but it has a large size due to a large number of resonators.…”

Section: Introductionmentioning

confidence: 99%

“…A tri-band filter was designed using only one set of resonators presented in [5]. Resonators with controllable second and third harmonics and stubloaded resonators have been used to generate three passbands.…”

Section: Introductionmentioning

confidence: 99%

A Novel Triple Passband Filter Design Method Based on Stepped Impedance Resonators

Li¹,

Wang²,

Su³

et al. 2012

PIER C

View full text Add to dashboard Cite

Abstract-In this letter, a novel compact tri-band bandpass filter (BPF) with high selectivity is presented. The proposed tri-band performance measure is realized by using eight sets of resonators, i.e., two-and three-section stepped impedance resonators (SIRs). The three-section SIR is designed for determining the three passbands and providing the electric coupling, while the two-section SIR is used for determining each passband respectively and providing the magnetic coupling. Then, coupling structures with two transmission zeros near each passband edge are presented, therefore, the band selectivity of the filter is much improved. The three passband frequencies could be independently designed and tuned. This novel tri-band BPF is fabricated and the measured results are in good agreement with the full-wave simulation results.

show abstract

Tri-band bandpass filter using stub loaded resonators

Cited by 122 publications

References 5 publications

Design of Novel Compact Tri-Band Bandpass Filter With Controllable Frequencies and High Selectivity

Design of Novel Compact Tri-Band Bandpass Filter With Controllable Frequencies and High Selectivity

Novel Design of a Compact Triple-Band Bandpass Filter Using Short Stub-Loaded Sirs and Embedded Sirs Structure

A Novel Triple Passband Filter Design Method Based on Stepped Impedance Resonators

Contact Info

Product

Resources

About