High temperature superconducting space-qualified multiplexers and delay lines

Talisa, S.H.; Janocko, M. A.; Meier, D.; Talvacchio, J.; Moskowitz, C.; Buck, David; Nye, R.S.; Pieseski, S.J.; Wagner, G. R.

doi:10.1109/22.508228

Cited by 32 publications

(7 citation statements)

References 17 publications

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“…However, HST contiguous-band diplexers are very difficult to implement due to design complexity, size limitations of commercially available HTS wafers and sealed cryogenic envelope. A possible approach for realizing HTS contiguous-band diplexer is to adopt the hybrid-coupled structure [7,8] . Each channel of the hybrid-coupled diplexers consists of two identical filters and two 3-dB hybrid couplers.…”

Section: Hts Contiguous-band Diplexer Multiplexer Esm Channelisermentioning

confidence: 99%

Design of high temperature superconducting contiguous-band diplexer

et al. 2009

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Section: Hts Contiguous-band Diplexer Multiplexer Esm Channelisermentioning

confidence: 99%

Design of high temperature superconducting contiguous-band diplexer

et al. 2009

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“…The comparison with the simulated result shows that the HTS triplexer has a relatively flat group delay characteristic. The performance of our triplexer was compared with that in [5], [6], [13] and [14] listed in table 2. The comparison showed that our HTS triplexer has higher isolation than other planar diplexer and smaller volume than coaxial cavity diplexer, which convinced the new structure superiority.…”

Section: Fabrication and Measurementmentioning

confidence: 99%

“…T-junction) [11][12][13]. Usually, the basic modules of this kind of multiplexers are HTS filters [14]. However the two technologies dramatically increase both the size and weight of multiplexers due to using orthogonal network and isolator [15].…”

Section: Introductionmentioning

confidence: 99%

Miniaturized high-temperature superconducting multiplexer with cascaded quadruplet structure

Xu¹,

Liu²,

Su³

et al. 2015

Supercond. Sci. Technol.

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In this paper, compact high temperature superconducting (HTS) multiplexers are presented for satellite communication applications. The first multiplexer consists of an input coupling node and three high-order bandpass filters, which is named triplexer. The node is realized by a loop microstrip line instead of conventional T-junction to eliminate the redundant susceptance due to combination of three filters. There are two eight-pole band-pass filters and one ten-pole band-pass filter with cascaded quadruplet structure for realizing high isolation. Moreover, the triplexer is extended to a multiplexer with six channels so as to verify the expansibility of the suggested approach. The triplexer is fabricated using double-sided YBa2Cu3O7 thin films on a 38 × 25 mm2 LaAlO3 substrate. The experimental results, when compared with those ones from the T-junction multiplexer, show that our multiplexer has lower insertion loss, smaller sizes and higher isolation between any two channels. Also, good agreement has been achieved between simulations and measurements, which illustrate the effectiveness of our methods for the design of high performance HTS multiplexers.

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“…A duplexer is usually used to split the input frequencies into two separate bands, or combine two separate bands into one. So far, a number of HTS duplexers have been reported [11][12][13][14][15][16][17][18]. However, few of them have high performance in all of their operating parameters, including the insertion loss (<0.2 dB), return loss (<-14 dB), out-of-band rejection (>70 dB) and channel isolation (>80 dB).…”

mentioning

confidence: 99%

An L-band HTS duplexer with improved performance

et al. 2010

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An L-band HTS duplexer with improved performance for communication applications has been developed. This is an improved version of the duplexer previously developed by our group. The duplexer was composed of a T-junction and two channels. Each channel has a 10-pole quasi-elliptic function bandpass HTS filter with a bandwidth of 27 MHz, and center frequencies at 1200 MHz and 1260 MHz. To achieve higher performance, especially a good balance between selectivity and flat group delay, the two pairs of transmission zeros from the two filters were reassigned so that one pair is used for high selectivity and the other for flat group delay. To reduce the influence of parasitical coupling, new coupling structures were developed in the simulation process. The duplexer was fabricated on a 2 inch diameter, 0.5 mm thick LaAlO 3 wafer with a double-sided YBCO film. The measured results showed a very high performance: a mid-band insertion loss of 0.2 dB, a return loss better than -14 dB, a shape factor better than 1.4 : 1, an out-of-band rejection of better than 70 dB in a wide frequency range up to 3 GHz and excellent isolation (higher than 80 dB) between the two channels. In addition, the frequency band 5 ns group delay variation is over 10.5 MHz (38.7% of 1 dB bandwidth).Since the discovery of high temperature superconductors in 1987, many kinds of HTS microwave devices and systems have been developed [1-10]. The duplexer is an important development among these devices. A duplexer is usually used to split the input frequencies into two separate bands, or combine two separate bands into one. So far, a number of HTS duplexers have been reported [11][12][13][14][15][16][17][18]. However, few of them have high performance in all of their operating parameters, including the insertion loss (<0.2 dB), return loss (<-14 dB), out-of-band rejection (>70 dB) and channel isolation (>80 dB). In particular, none were designed with consideration of the group delay, which is as important as high selectivity since high capacity digital signals are transmitted on many communication systems.In a recent work, we reported on a compact L-band microstrip HTS manifold-coupled input duplexer with high *Corresponding author (email: yshe@aphy.iphy.ac.cn) selectivity performance for satellite communication application [19]. In this paper, we present an improved HTS duplexer that not only has high selectivity but also takes group delay flatness into consideration. The duplexer has two channels with center frequencies in the L-band.

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High temperature superconducting space-qualified multiplexers and delay lines

Cited by 32 publications

References 17 publications

Design of high temperature superconducting contiguous-band diplexer

Design of high temperature superconducting contiguous-band diplexer

Miniaturized high-temperature superconducting multiplexer with cascaded quadruplet structure

An L-band HTS duplexer with improved performance

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