An X-Band Front-End Module Using HTS Technique for a Commercial Dual Mode Radar

Niu, Dow-Chih; Huang, T.W.; Lee, Hao-Jung; Chang, Chi‐Yang

doi:10.1109/tasc.2005.850184

Cited by 18 publications

(16 citation statements)

References 5 publications

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“…Only a few studies have been conducted on resonators and filters working at high frequency bands, such as X‐, Ku‐, K‐, and Ka‐bands. X‐band filters functioning at the frequencies of 8‐12.4 GHz have attracted increasing attention recently . Ryan describes several HTS filters for improved wireless systems at X‐band.…”

Section: Introductionmentioning

confidence: 99%

“…X-band filters functioning at the frequencies of 8-12.4 GHz have attracted increasing attention recently. [7][8][9][10][11][12][13][14][15] Ryan 7 describes several HTS filters for improved wireless systems at X-band. In 1995, a pair of two-pole filters at X-band, one with gold and the other with YBCO thin films, were fabricated and compared.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and optimization of the unpredictable transmission zero in X-band filter design

Jiang

Wei

Zheng

et al. 2016

Int. J. RF Microw. Comput. Aided Eng.

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This article focuses on the common problem of uncontrollable transmission zero (TZ) in X‐band filter design. Using uniform impedance rectangular resonator (UIRR) to design an X‐band filter always results in an unpredictable TZ on the low‐frequency side of the passband, which greatly deteriorates the frequency selectivity of the filter performance. Electromagnetic coupling polarity analysis of the UIRR shows that the magnetic crosscoupling between nonadjacent resonators which is opposite to the main coupling plays a major role in the unpredictable TZ. By optimizing the UIRR from the loop structure with a small opening to the folded one, weak couplings between resonators are obtained. A high‐temperature superconducting filter at X‐band using folded UIRR resonator was designed and fabricated with a center frequency of 10.01 GHz and a bandwidth of 58 MHz, and the uncontrollable TZ has been removed successfully from the low‐frequency side of passband. The measured insertion loss is less than 0.4 dB and the return loss is greater than 15 dB.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis and optimization of the unpredictable transmission zero in X-band filter design

Jiang

Wei

Zheng

et al. 2016

Int. J. RF Microw. Comput. Aided Eng.

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show abstract

“…These designs can be determined from the odd and even modes of each coupled section [8] and [9]. Some filter structures are extended the basic design of cascaded parallel-coupled microstrip filter on a special dielectric substrate [10]- [14] while the other can be obtained by bending the resonators of parallel-coupled filters. Hairpin, hairpin-comb and zig-zag filters are examples of filter that is bended in order to reduce its size [10], [15]- [16].…”

Section: Introductionmentioning

confidence: 99%

A microstrip diplexer filter using stepped-impedance resonators

Puttadilok

Eungdamrong

Amornsaensak

2008

2008 SICE Annual Conference

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Parallel coupled-line filter covers odd and even wave coupling of transmission lines. Cascading parallel coupled-line sections gives rise to a bandpass filter structure. Since conventional parallel coupled-line filter has poor spurious response and isolation performance, step impedance technique is added to improve its performance. A new Zig-Zag diplexer filter using stepped-impedance resonators is proposed in this paper. This diplexer filter has a narrow-band bandwidth, high isolation between its terminals, and operates at 2.4 GHz and 5GHz, which are the frequencies for Wireless LAN applications. The simulation results show that this microstrip filter has excellent performance on return loss, insertion loss, and isolation.

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“…Follows the extensive application of YBCO HTS (High temperature superconducting) film and its relative devices in the realm of aviation, spaceflight and military [1], it is a direction to enhance the integration degree of HTS system which is very important to improve the capability and minish the bulk of systems [2].…”

Section: Introductionmentioning

confidence: 99%

Study of optically controlled high temperature superconducting microwave variable attenuator

Lin

et al. 2007

Micro & Optical Tech Letters

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An X-Band Front-End Module Using HTS Technique for a Commercial Dual Mode Radar

Cited by 18 publications

References 5 publications

Analysis and optimization of the unpredictable transmission zero in X-band filter design

Analysis and optimization of the unpredictable transmission zero in X-band filter design

A microstrip diplexer filter using stepped-impedance resonators

Study of optically controlled high temperature superconducting microwave variable attenuator

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