2 GHz tunable superconducting band-pass filter using a piezoelectric bender

Terashima, Yutaka; Fuke, Hiroyuki; Aiga, Fumihiko; Yamazaki, Masahito; Kayano, Hiroyuki; Kato, Riichi

doi:10.1016/s0921-4534(01)00888-7

Cited by 22 publications

(11 citation statements)

References 10 publications

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“…It was important to develop a filter capable of shifting the resonance frequency in a short time. Several techniques for shifting the center frequency of the superconducting bandpass filters have been proposed [17][18][19][20]; however, the most practical method is to use a tuning rod. Ohshima et al developed an automatic tuning system using dielectric rods.…”

Section: Superconducting Bandpass Filters For Wireless Communicationmentioning

confidence: 99%

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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Section: Superconducting Bandpass Filters For Wireless Communicationmentioning

confidence: 99%

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

Ohshima

2018

J. Phys.: Conf. Ser.

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“…The displacement of a dielectric floating plate above the filter was adjusted to tune the filter. We used this method because it makes researching the basic effects of the trimming simple [2,[4][5][6][7]11]. We assumed r-sapphire and (La 0.3 Sr 0.7 )(Al 0.65 Ta 0.35 )O 3 [LSAT] for the substrate and the floating plate, respectively.…”

Section: Design Of the Filtermentioning

confidence: 99%

“…HTS filters are also suitable for future software-defined radio (SDR) systems. Since SDR systems require a filter with wide-range frequency tunability there has been increasing interest in tunable bandpass filters [1][2][3][4][5][6][7][8][9][10][11]. Center-frequency tuning has been widely researched, and various methods have been devised to increase the frequency range of tunable filters.…”

Section: Introductionmentioning

confidence: 99%

Novel trimming technique for tunable HTS microstrip filters

Sekiya

Nakagawa

Saito

et al. 2008

Physica C: Superconductivity

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“…1. The resonators are arranged with shifts in order to weaken the couplings and to reduce the length of the filter, as in our previous work [11]- [13]. The filter synthesis was carried out according to the design theory of Chebyshev filter [14].…”

Section: Design and Fabricationmentioning

confidence: 99%

HTS hairpin microstrip filter on r-cut sapphire substrate

Aiga

Fuke

Terashima

et al. 2003

IEEE Trans. Appl. Supercond.

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We have developed a 17-pole high-temperature superconductor thin-film hairpin microstrip filter on r-cut sapphire substrate. We determined the optimum orientation of hairpin resonators on r-cut sapphire substrates, considering the anisotropy of dielectric permittivity. With optimum orientation, the desired frequency response was realized. On the other hand, when the orientation was not the optimum, the frequency response was violently disturbed. The cause of the disturbance of the frequency response was investigated.

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2 GHz tunable superconducting band-pass filter using a piezoelectric bender

Cited by 22 publications

References 10 publications

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

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

Novel trimming technique for tunable HTS microstrip filters

HTS hairpin microstrip filter on r-cut sapphire substrate

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