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.

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.

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 Substrate integrated waveguide bandpass filter for short range device application using rectangular open loop resonator

2021 ◽  
Vol 11 (5) ◽  
pp. 3747
Author(s):  
Dian Widi Astuti ◽  
Rizki Ramadhan Putra ◽  
Muslim Muslim ◽  
Mudrik Alaydrus
Keyword(s):  
Short Range ◽  
Return Loss ◽  
Bandpass Filter ◽  
Open Loop ◽  
Frequency Region ◽  
Substrate Integrated Waveguide ◽  
Network Analyzer ◽  
Measurement Results ◽  
Simulation Results ◽  
Good Agreement

The substrate integrated waveguide (SIW) structure is the candidate for many application in microwave, terahertz and millimeter wave application. It because of SIW structure can integrate with any component in one substrate than others structure. A kind components using SIW structure is a filter component, especialy bandpass filter. This research recommended SIW bandpass filter using rectangular open loop resonator for giving more selectivity of filter. It can be implemented for short range device (SRD) application in frequency region 2.4 - 2.483 GHz. Two types of SIW bandpass filter are proposed. First, SIW bandpass filter is proposed using six rectangular open loop resonators while the second SIW bandpass filter used eight rectangular open loop resonators. The simulation results for two kinds of the recommended rectangular open loop resonators have insertion loss (S<sub>21</sub> parameter) below 2 dB and return loss (S<sub>11</sub> parameter) more than 10 dB. Fabrication of the recommended two kind filters was validated by Vector Network Analyzer. The measurement results for six rectangular open loop resonators have 1.32 dB for S<sub>21</sub> parameter at 2.29 GHz while the S<sub>11</sub> parameter more than 18 dB at 2.26 GHz – 2.32 GHz. While the measurement results has good agreement for eight rectangular open loop resonators. Its have S<sub>21</sub> below 2.2 dB at 2.41 – 2.47 GHz and S<sub>11</sub> 16.27 dB at 2.38 GHz and 11.5 dB at 2.47 GHz.

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.

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.

High-Power White LED Driver Circuit Characteristics and Design

2011 ◽  
Vol 347-353 ◽  
pp. 917-921
Author(s):  
Ya Fang Wang
Keyword(s):  
Test Results ◽  
Led Driver ◽  
Good Reliability ◽  
Typical Application ◽  
Actual Measurement ◽  
Measurement Results ◽  
Driver Circuit ◽  
Drive Circuit ◽  
White Led Driver ◽  
Led Lights

Summed up the development process in the LED, LED parametric test and drive circuit design is necessary. Based on the actual test results, design a typical application of the LED drive circuit. Experiments show that using LED lights instead of the traditional incandescent lamp is a general trend，with good reliability. The actual measurement results were compared, demonstrating the practicality of conclusion.

Design of a Wedge-Angle Log-Periodic Antenna

2015 ◽  
Vol 719-720 ◽  
pp. 680-686
Author(s):  
Zhen Yu ◽  
Xiao Ying Ran ◽  
Jian Guo Yu
Keyword(s):  
Wedge Angle ◽  
Visual Basic ◽  
Dipole Antenna ◽  
Center Frequency ◽  
Network Analyzer ◽  
Broad Bandwidth ◽  
Microstrip Patch ◽  
Ansoft Hfss ◽  
Measurement Results ◽  
Log Periodic Antenna

A wideband wedge-angle microstrip patch log-periodic antenna with 16 units operates at the center frequency 2.45GHz, is presented in this paper. Design an antenna interactive calculator with Visual Basic software to calculate and to adjust antenna parameters conveniently. Then, construct, simulate, and optimize the antenna model by use of Ansoft HFSS software. The patch log-periodic dipole antenna (LPDA) is tested by PNA3621 vector network analyzer. Measurement results show that the antenna has good characteristics with symmetrical radiation pattern, broad bandwidth, little number of side lobes, and voltage standing wave ratio with echo loss are relatively ideal in 2GHz~3.2GHz frequency range, which agree well with the simulation results.

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.

The Application of Microwave Ceramic in Filter-Antenna Module for WLAN System

2015 ◽  
Vol 799-800 ◽  
pp. 1366-1369
Author(s):  
Yih Chien Chen ◽  
Ruei Yang Syu ◽  
Chih Hung Li
Keyword(s):  
Return Loss ◽  
Electromagnetic Coupling ◽  
Center Frequency ◽  
Harmonic Frequency ◽  
Half Wavelength ◽  
Measurement Results ◽  
Microwave Ceramic ◽  
Antenna Module ◽  
Good Agreement ◽  
Microstrip Feed

In this paper, the simulation and measurement results of a filter-antenna module for application in WLAN band are presented. The filter-antenna module is fabricated on microwave ceramic substrate. The filter-antenna module is consisted of a monopole antenna, two U-shaped microstrip half wavelength resonators, and a tapped open stub. The proposed filter-antenna module has good agreement between the measurement and the simulation results. At center frequency, electromagnetic coupling between two half-wavelength resonators and inverted-L shaped microstrip feed line occurs and contributes the radiation. At the harmonic frequency, the currents are mainly distributed around the tapped open stub. The proposed filter-antenna module has a 10 dB return loss with bandwidth 290 MHz (2,337 - 2,627 MHz), covering the WLAN band.

scholarly journals A balanced-to-balanced directional coupler based on branch-slotline coupled structure

Frequenz ◽  
2020 ◽  
Vol 74 (11-12) ◽  
pp. 427-433
Author(s):  
Yaxin Liu ◽  
Feng Wei ◽  
Xiaowei Shi ◽  
Cao Zeng
Keyword(s):  
Directional Coupler ◽  
Return Loss ◽  
Design Method ◽  
Differential Mode ◽  
Arbitrary Power ◽  
Measurement Results ◽  
Transition Structures ◽  
Coupled Structures ◽  
Better Than ◽  
Good Agreement

AbstractIn this paper, a balanced-to-balanced (BTB) branch-slotline directional coupler (DC) is firstly presented, which can realize an arbitrary power division ratios (PDRs). The coupler is composed by microstrip-to-slotline (MS) transition structures and branch-slotline coupled structures. The single-ended to balanced-ended conversion is simplified and easy to implemented by the MS transition structures, which intrinsically leads to the differential-mode (DM) transmission and common-mode (CM) suppression. Moreover, the different PDRs which are controlled by the widths of branch-slotlines can be achieved. In order to verify the feasibility of the proposed design method, two prototype circuits of the proposed coupler with different PDRs are fabricated and measured. The return loss and the isolation of two designs are all better than 10 dB. Moreover, the CM suppressions are greater than 35 dB. A good agreement between the simulation and measurement results is observed.

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