Development of UWB HTS Bandpass Filters With Microstrip Stubs-Loaded Three-Mode Resonator

Ishii, H.; Kimura, T.; Kobayashi, N.; Saito, Atsushi; Ma, Zhewang; Ohshima, Shigetoshi

doi:10.1109/tasc.2012.2232697

Cited by 23 publications

(14 citation statements)

References 9 publications

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“…In the ultra-wide passband from 4.1 to 9.6 GHz, it has high return loss (>12 dB) and low insertion loss (<0:4 dB), as well as sharp skirt property. Also, the overall size of this UWB BPF is found to approximately equal to 0:5 g =2 Â 0:3 g at 6.85 GHz (the center frequency of the designed passband) that is much smaller than that of the existing designs in [11,12,13,14,15].…”

Section: Design Of a Uwb Bpf (Filter I)mentioning

confidence: 85%

“…Besides, various sub-loaded multi-mode resonators have been proposed and implemented to design UWB filters [11,12,13,14,15], which are characterized by the ease of controlling the frequency response compared with other resonators. In [11], a UWB bandpass filter is developed by using microstrip stub-loaded dualmode resonator doublets, the fractional bandwidth is wide (over 103%) but requires at least two MMRs and more for better skirt property.…”

Section: Introductionmentioning

confidence: 99%

“…In [11], a UWB bandpass filter is developed by using microstrip stub-loaded dualmode resonator doublets, the fractional bandwidth is wide (over 103%) but requires at least two MMRs and more for better skirt property. In [12], a microstrip tri-mode resonator with two open-circuit stubs is introduced. The UWB bandpass filter based on this proposed MMR has a very simple structure but the fractional bandwidth is relatively narrow (about 30%).…”

Section: Introductionmentioning

confidence: 99%

“…Also, there are implements of stub-loaded ring resonators in UWB BPF designs [14,15], which also perform multi-mode resonances, but their structures are less compact. Moreover, to improve the communication quality, there is a demand for these UWB BPFs to have wide stopband for suppressing interfering signals from other bands by applying appropriate harmonic suppression techniques [6,12,16].…”

Section: Introductionmentioning

confidence: 99%

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A compact utral-wideband bandpass filter with broad stopband based on step-impedance stub-loaded tri-mode resonator

Yang

2017

IEICE Electron. Express

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A five-pole ultra-wideband (UWB) bandpass filter (BPF) with broad stopband for FCC UWB indoor communication application is developed. It employs a step-impedance stub-loaded tri-mode resonator, by properly selecting the impedance ratio of the stub, the proposed resonator is able to be downsized without changing significantly its tri-mode characteristics. The advantages of such resonator are easy control of its frequency response and highly compact in structure compared with other resonators. Moreover, a lowpass filter (LPF) is utilized to suppress the unwanted highfrequency harmonics of the proposed UWB BPF. Design and synthesis procedures with details are provided, and good agreement between simulated and measured results is also observed. Due to the fact that the introduced filter structure is simple and all the geometrical parameters are larger than 0.1 mm, the UWB BPF is feasible for low-cost fabrication using conventional printed circuit fabricating techniques.

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Section: Design Of a Uwb Bpf (Filter I)mentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A compact utral-wideband bandpass filter with broad stopband based on step-impedance stub-loaded tri-mode resonator

Yang

2017

IEICE Electron. Express

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“…9 shows the structure of a UWB superconducting filter for low band, and Fig 10 shows the results. The filter meets the specification of UWB communication [28]. …”

Section: Ultra-wide Band Filter For Uwb Communicationmentioning

confidence: 92%

A Thirty-year History of Superconducting Microwave Devices and Fundamental Studies Thereof

Ohshima

2018

J. Phys.: Conf. Ser.

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Abstract. Thirty years have passed since the discovery of high-temperature superconductors (HTS), and practical applications of HTS equipment and devices are moving into full-swing. From the beginning of their discovery, the use of HTS in microwave devices has been recognized as one of their most practical applications. This is because the surface resistance of HTS is about 1/1000 of that of pure copper at 1 GHz and 77 K. From early on, researchers have recognized that high performance of microwave passive devices could be realized by utilizing the characteristics of HTS. In addition, the size of HTS microwave devices is relatively small, and they can be cooled by a small cryocooler. Furthermore, we were able to establish high-quality HTS thin-film fabrication technology essential for producing high performance microwave devices in a short period of time. In view of the above, I would like to present an overview of the past thirty years of superconducting microwave devices and fundamental studies thereof.

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Wideband Balanced Filters on Slotline Resonator With Intrinsic Common‐mode Rejection

Martiacuten¹,

Li²,

Hong³

et al. 2018

Balanced Microwave Filters

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Development of UWB HTS Bandpass Filters With Microstrip Stubs-Loaded Three-Mode Resonator

Cited by 23 publications

References 9 publications

A compact utral-wideband bandpass filter with broad stopband based on step-impedance stub-loaded tri-mode resonator

A compact utral-wideband bandpass filter with broad stopband based on step-impedance stub-loaded tri-mode resonator

A Thirty-year History of Superconducting Microwave Devices and Fundamental Studies Thereof

Wideband Balanced Filters on Slotline Resonator With Intrinsic Common‐mode Rejection

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