High-Temperature Superconducting Linear Phase Filter for WCDMA Communication System

2013 ◽  
Vol 753-755 ◽  
pp. 2407-2410
Author(s):  
Li Juan He ◽  
Lai Yun Ji ◽  
Jian Chang Du
Keyword(s):  
High Temperature ◽  
Communication System ◽  
Equivalent Model ◽  
Center Frequency ◽  
Linear Phase ◽  
Filter Bandwidth ◽  
High Temperature Superconducting ◽  
Phase Filter ◽  
Measurement Results ◽  
Good Agreement

This paper represents a high-temperature superconducting (HTS) linear phase filter with self-equalization for WCDMA communication system. of the filter have been presented. The principle, equivalent model, theoretical result, coupling matrix, and the simulated result have been presented. The desired filter with 12-pole and 2 cross couplings has a center frequency of 1950 MHz. The measurement results show that the response of practical filters is in good agreement with that of simulated results and theoretical analysis, the group delay variation is less than ±10 ns over 75% of the filter bandwidth.

HTSC Cascaded Linear-Phase Filter with Quasi-Elliptic Response

2014 ◽  
Vol 610 ◽  
pp. 822-826
Author(s):  
Tian Liang Zhang ◽  
Kai Yang ◽  
Xiang Yang Ren ◽  
Ling Zang ◽  
Yi Fei Zhang ◽  
...  
Keyword(s):  
Group Delay ◽  
High Order ◽  
Center Frequency ◽  
Linear Phase ◽  
New Approach ◽  
Filter Bandwidth ◽  
Order Linear ◽  
Phase Filter ◽  
Linear Phase Filters ◽  
Delay Variation

In view of the difficulty of designing a high-order linear phase filter with prototype parameters directly, this paper proposes a new approach to rapidly construct a high order linear phase filter through cascading two same low-order linear phase filters. A twelve-order HTSC cascaded linear phase filter is fabricated on YBCO/LaAlO3/YBCO substrate with the dimension of 44.1mm ×31.4mm. The measured result shows that the filter has a 56 MHz passband at a center frequency of 1993 MHz. The minimum insertion loss in the passband is 0.59 dB. The group delay variation in passband is less than 5 ns over 78.5% of the filter bandwidth which is in good agree with the simulation result.

Three-Channel High Temperature Superconducting Filter

2012 ◽  
Vol 588-589 ◽  
pp. 719-722 ◽  
Author(s):  
Wen Bin Gao ◽  
Li Juan He ◽  
Lai Yun Ji
Keyword(s):  
High Temperature ◽  
Theoretical Analysis ◽  
Equivalent Model ◽  
High Temperature Superconducting ◽  
Front End ◽  
Superconducting Filters ◽  
Channelized Receiver ◽  
Channel Filter ◽  
Good Agreement

A three-channel high temperature superconducting filter is designed for channelized receiver front-end systems. The principle and equivalent model of the filter has been demonstrated. There is 6-pole for each channel of the desired three-channel filter. The bandwidth of each channel is 40MHz.The simulation result is good agreement with theoretical analysis, illustrating the feasibility of this design. Such a structure of high temperature superconducting filters will have a wide application in communication fields

A Filtering Power Divider with Tunable Center Frequency and Wide Stopband

Frequenz ◽  
2019 ◽  
Vol 73 (9-10) ◽  
pp. 301-306
Author(s):  
Xuehan Hu ◽  
Feng Wei ◽  
Jiawen Hao ◽  
Xiaowei Shi
Keyword(s):  
Design Method ◽  
Power Divider ◽  
Center Frequency ◽  
Electrical Length ◽  
Transmission Zeros ◽  
Quarter Wavelength ◽  
Varactor Diodes ◽  
Measurement Results ◽  
Band Pass ◽  
Good Agreement

AbstractIn this paper, a tunable power divider (PD) with a good band-pass filtering response using quarter-wavelength stepped impedance resonators (SIRs) is presented. By appropriately adjusting the impedance and electrical length ratio of SIR, the proposed structure can achieve wide stopband performance. Meanwhile, four varactor diodes are loaded to the external resonators to achieve electrical reconfiguration. In addition, a pair of transmission zeros (TZs) can be generated by applying source and load coupling on each side of the passband, which can effectively improve passband selectivity and out-of-band rejection. In order to verify the feasibility of the proposed design method, a prototype circuit of the proposed filtering power divider (FPD) with tunable center frequency is simulated, fabricated and measured. A good agreement between the simulation and measurement results is observed.

Study on Design and Experiment of SAW Device Based on MSC

2011 ◽  
Vol 135-136 ◽  
pp. 954-959
Author(s):  
Chang Bao Wen ◽  
Yong Feng Ju ◽  
Li Liu ◽  
Ya Fei Jiang ◽  
Chen Zhao ◽  
...  
Keyword(s):  
Modular Design ◽  
Center Frequency ◽  
Network Analyzer ◽  
Test Results ◽  
Design Environment ◽  
Actual Measurement ◽  
Measurement Results ◽  
Data Output ◽  
Output Module ◽  
Good Agreement

In the design process of surface acoustic wave (SAW) device based on multistrip coupler (MSC), the characteristics of interdigital transducer (IDT) and device can not been directly achieved, and the layout structure of device can not be observed and checked. To solve some problems, the design platform of SAW device based MSC was realized in the Matlab design environment using the modular design. The design platform of SAW device based MSC consists of layout simulation module, characteristics simulation module and data output module. By means of realizing a SAW device based MSC with center frequency at 51.293MHz, the comparison and analysis between the design results and the actual test results are presented. Experiments results confirm that the platform can correctly design the device layout. The device characteristics achieved by the design platform are in good agreement with the actual measurement results by the network analyzer.

High-temperature superconducting beam forming network for communication system applications

1997 ◽  
Vol 7 (1) ◽  
pp. 33-39 ◽  
Author(s):  
H. Kobeissi ◽  
D.J. Drolet ◽  
Ke Wu ◽  
M.G. Stubbs ◽  
G. Larralde ◽  
...  
Keyword(s):  
High Temperature ◽  
Communication System ◽  
Beam Forming ◽  
High Temperature Superconducting

Dual-wideband bandpass filter with independently controllable center frequencies and wide stopband

2017 ◽  
Vol 10 (1) ◽  
pp. 93-99 ◽  
Author(s):  
Yang Xiong ◽  
Litian Wang ◽  
Doudou Pang ◽  
Wei Zhang ◽  
Fan Zhang ◽  
...  
Keyword(s):  
Bandpass Filter ◽  
Experimental Results ◽  
The Other ◽  
Mode Analysis ◽  
Center Frequency ◽  
Analysis Method ◽  
Measurement Results ◽  
Mode Resonator ◽  
Good Agreement

In this paper, a dual-wideband bandpass filter (BPF) with independently controllable center frequencies (CFs) and wide stopband suppression is presented using a new quintuple-mode resonator (QMR). By applying the classical odd-/even-mode analysis method, the resonant characteristics of the new QMR have been analyzed. It shows that five modes can be excited, and two of them can be employed to form the lower passband, while the other three modes contribute to the higher passband. For verification, a dual-wideband BPF using the new QMR is designed, fabricated, and tested. Experimental results show that the CFs of the dual-wideband BPF centered at 2.96 GHz and 5.695 GHz with 3 dB fractional bandwidths of 27.7 and 23.4%, respectively. In addition, 20-dB suppression in upper-stopband ranges from 2.23 to 4.04f0, where f0 is the center frequency of the first passband. The measurement results are in good agreement with the prediction results.

scholarly journals An end-fire low profile patch antenna to work on WiMAX frequencies used for harvesting power supply

2021 ◽  
Vol 10 (5) ◽  
pp. 2678-2685
Author(s):  
Anwer Sabah Mekki ◽  
Siba Monther Yousif ◽  
Bashar Mudhafar Ahmed ◽  
Mustafa Mohammed Jawad
Keyword(s):  
Power Supply ◽  
Patch Antenna ◽  
Fire Retardant ◽  
Wide Band ◽  
High Gain ◽  
Center Frequency ◽  
High Loss ◽  
Low Profile ◽  
Measurement Results ◽  
Good Agreement

In this paper, an end-fire microstrip patch antenna (MPA) is proposed of 3 GHz as a center frequency, designed, simulated, and measured to work on WiMAX frequencies within standard of 802.16e (WiMAX). A high gain ranged between (12.117-13.324) dB, high front to back ratio (F/B) of (35.770) at the center frequency, a wide band of 1.701 GHz, low profile, and semi-ideal voltage standing wave ratio (VSWR) of 1.053 is achieved. The simulation is done using computer simulation technology (CST-MW). The proposed design is based on two Fire-retardant substrates (FR-4) of relative permittivity (ε) 4.3+j0.025 and 1.53 mm thickness for each one, which is considered a high loss material. The measurement results show good agreement with the simulated results. In addition, the design can be used for harvesting power supply from mobile towers. Finally, the proposed design is compared with two other designs in terms of power conversion efficiency and overall size.

Suitability of passive RC-network-based inductorless bridged-T as a bandpass NGD circuit

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Sébastien Lalléchére ◽  
Jamel Nebhen ◽  
Yang Liu ◽  
George Chan ◽  
Glauco Fontgalland ◽  
...  
Keyword(s):  
Design Methodology ◽  
Group Delay ◽  
Center Frequency ◽  
Proof Of Concept ◽  
Content Type ◽  
Equivalent Impedance ◽  
Measurement Results ◽  
Passive Network ◽  
Modeling Theory ◽  
Good Agreement

Purpose The purpose of this paper is to study, a bridged-T topology with inductorless passive network used as a bandpass (BP) negative group delay (NGD) function. Design/methodology/approach The BP NGD topology under study is composed of an inductorless passive resistive capacitive network. The circuit analysis is elaborated from the equivalent impedance matrix. Then, the analytical model of the C-shunt bridged-T topology voltage transfer function is established. The BP NGD analysis of the considered topology is developed in function of the bridged-T parameters. The NGD properties and characterizations of the proposed topology are analytically expressed. Moreover, the relevance of the BP NGD theory is verified with the design and fabrication of surface mounted device components-based proof-of-concept (PoC). Findings From measurement results, the BP NGD network with −151 ns at the center frequency of 1 MHz over −6.6 dB attenuation is in very good agreement with the C-shunt bridged-T PoC. Originality/value This paper develops a mathematical modeling theory and measurement of a C-shunt bridged-T network circuit.

scholarly journals High temperature superconducting filter with linear phase on LaAlO3 substrates

2009 ◽  
Vol 58 (6) ◽  
pp. 4194
Author(s):  
Zuo Tao ◽  
Zhao Xin-Jie ◽  
Wang Xiao-Kun ◽  
Yue Hong-Wei ◽  
Fang Lan ◽  
...  
Keyword(s):  
High Temperature ◽  
Linear Phase ◽  
High Temperature Superconducting
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