Dual-Mode Microstrip Open-Loop Resonators and Filters

Hong, Jia-Sheng; Shaman, Hussein; Chun, Young-Hoon

doi:10.1109/tmtt.2007.901592

Cited by 271 publications

(213 citation statements)

References 9 publications

Supporting

Mentioning

210

Contrasting

Unclassified

Order By: Relevance

“…Thus, the two modes are two non-degenerate modes. Also, like the open loaded open-loop dual-mode resonators [11], a transmission zero is generated by this type of resonator. The transmission zero is inherent and always located at a finite frequency since the coupling strength between the external feeding network and the two modes are different [25].…”

Section: Dual-mode Dgs Resonatormentioning

confidence: 99%

“…Meanwhile, dual-mode resonators with two non-degenerate modes, such as the open-stub loaded dual-mode resonators [11] and the shortstub loaded dual-mode resonators [12], attract more attentions, since they are much smaller in size, and have the advantages in design flexibility and inherent zero. The open-stub loaded resonator has a size of about λ g /8 by λ g /8 [11], and the short-stub loaded resonator may be designed to be much more compact [12].…”

Section: Introductionmentioning

confidence: 99%

“…The open-stub loaded resonator has a size of about λ g /8 by λ g /8 [11], and the short-stub loaded resonator may be designed to be much more compact [12]. Nevertheless, feed structures of the circuits using dual-mode resonators, such as bandpass filters with source-load coupling [13,14] and dual-band filters [15,16], cannot be designed flexibly.…”

Section: Introductionmentioning

confidence: 99%

“…It has two non-degenerate modes and an inherent transmission zero. This type of resonator has a compact size similar to the open-stub loaded dual-mode resonator [11]. Because of its defected ground structure, the feed structure can be designed very flexibly.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Compact Dual-Mode DGS Resonators and Filters

Wang¹,

Bo-ran²

2011

PIER Letters

View full text Add to dashboard Cite

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.

show abstract

Section: Dual-mode Dgs Resonatormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Compact Dual-Mode DGS Resonators and Filters

Wang¹,

Bo-ran²

2011

PIER Letters

View full text Add to dashboard Cite

show abstract

“…All the dual-band BPFs presented above were designed using two or more resonators. For miniaturization, a variety of dual-mode resonators were proposed to design filters [10][11][12]. Many reports have been published about dual-mode dual-band BPFs [13][14][15][16][17][18][19], in which the first harmonic even-and odd-mode are utilized to form the second passband, thus leading to both passbands dependent on each other which is undesirable.…”

Section: Introductionmentioning

confidence: 99%

Dual-Band Bandpass Filter With Wide Upper Stopband Using Novel Stepped Impedance Stub-Loaded Quad-Mode Resonator

Lin¹,

Zhang²,

Sun³

et al. 2015

PIER Letters

View full text Add to dashboard Cite

Abstract-This paper presents a wide upper stopband dual-band bandpass filter (BPF) with controllable passband frequencies and bandwidths as well as a high out-of-band rejection level. The proposed filter is realized by utilizing a novel stepped impedance stub-loaded quad-mode resonator. All the four-mode equivalent circuits of the resonator are quarter-wavelength stepped impedance resonators (SIRs), and their fundamental resonance frequencies are used to form the passbands, so the designed filter has a compact circuit size. By controlling the impedance and length ratios of the stubs of the resonator, wide upper stopband performance is obtained. Hook-shape feed-lines and source-load coupling are applied to provide appropriate external coupling and generate three extra transmission zeros, which greatly improve the selectivity of the proposed filter. An experimental filter operating at 1.5 and 3.5 GHz is designed, fabricated, and measured for validation. The measured results have good agreement with the simulated ones.

show abstract

Compact Filters and Filter Miniaturization

Hong¹

2011

Microstrip Filters for RF/Microwave Applications

View full text Add to dashboard Cite

Dual-Mode Microstrip Open-Loop Resonators and Filters

Cited by 271 publications

References 9 publications

Compact Dual-Mode DGS Resonators and Filters

Compact Dual-Mode DGS Resonators and Filters

Dual-Band Bandpass Filter With Wide Upper Stopband Using Novel Stepped Impedance Stub-Loaded Quad-Mode Resonator

Compact Filters and Filter Miniaturization

Contact Info

Product

Resources

About