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Low-Microwave Loss Coplanar Waveguides Fabricated on High-Resistivity Silicon Substrate 被引量:1
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作者 杨华 朱洪亮 +3 位作者 谢红云 赵玲娟 周帆 王圩 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2006年第1期1-4,共4页
Three kinds of coplanar waveguides (CPWs) are designed and fabricated on different silicon substrates---common low-resistivity silicon substrate (LRS), LRS with a 3μm-thick silicon oxide interlayer, and high-resi... Three kinds of coplanar waveguides (CPWs) are designed and fabricated on different silicon substrates---common low-resistivity silicon substrate (LRS), LRS with a 3μm-thick silicon oxide interlayer, and high-resistivity silicon (HRS) substrate. The results show that the microwave loss of a CPW on LRS is too high to be used, but it can be greatly reduced by adding a thick interlayer of silicon oxide between the CPW transmission lines and the LRS.A CPW directly on HRS shows a loss lower than 2dB/cm in the range of 0-26GHz and the process is simple,so HRS is a more suitable CPW substrate. 展开更多
关键词 coplanar waveguides high-resistivity silicon microwave loss high frequency optoelectronic packaging
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Ultra-wideband bilateral tapered slot-line antenna fed by coplanar waveguide 被引量:1
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作者 章朋 章文勋 《Journal of Southeast University(English Edition)》 EI CAS 2011年第2期128-131,共4页
In order to broaden the bandwidth of a tapered slot- line antenna (TSA), a bilateral tapered slot-line antenna (BTSA) with a new feeding structure of coplanar waveguide (CPW) is developed. Based on the fact that... In order to broaden the bandwidth of a tapered slot- line antenna (TSA), a bilateral tapered slot-line antenna (BTSA) with a new feeding structure of coplanar waveguide (CPW) is developed. Based on the fact that the bandwidth limitation of TSA mainly depends on its feeding structure, an improved CPW-based feed structure etched on the backboard of the BTSA is adopted to perform traveling-wave transition. Both the simulation results and measurement data verify that the proposed feeding structure results in "high-pass" frequency response for antenna impedance matching. The voltage standing wave ratio (VSWR) is less than 2:1 when the frequency is higher than 3 GHz. The antenna gain exceeds 7 dBi with good radiation patterns when the bandwidth is from 4 to 16 GHz. This ultra wideband (UWB) antenna with a compact size is specially available for the electronic systems of counter-measure and microwave imaging. 展开更多
关键词 ultra wideband (UWB) tapered slot-line antenna(TSA) feeding structure coplanar waveguide (CPW)
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Characterization and Modeling of Finite-Ground Coplanar Waveguides in 0.13μm CMOS
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作者 陈勖 王志功 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2006年第6期982-987,共6页
We discuss the characterization and modeling of coplanar waveguides (CPW) realized in TSMC 0. 13μm CMOS process. EM-field simulations with momentum are performed to estimate the important parameters of the transmis... We discuss the characterization and modeling of coplanar waveguides (CPW) realized in TSMC 0. 13μm CMOS process. EM-field simulations with momentum are performed to estimate the important parameters of the transmission lines, such as characteristic impedance and propagation loss. Coplanar waveguide libraries are designed with Z values of 30,50,70, and 100Ω. Finally, the propagation constant and the characteristic impedance are measured in a frequency range from 0. 1 to 40GHz with a vector-network analyzer,using the short-open-loadthru (SOLT) de-embedding technique. The distributed parameters of the CPWs are extracted from the measured S-parameters. 展开更多
关键词 coplanar waveguide CMOS S-PARAMETER
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An analytical model for coplanar waveguide on silicon-on-insulator substrate with conformal mapping technique 被引量:1
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作者 何大伟 程新红 +3 位作者 王中健 徐大伟 宋朝瑞 俞跃辉 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第1期98-104,共7页
In this paper, the authors present an analytical model for coplanar waveguide on silicon-on-insulator substrate. The four-element topological network and the conformal mapping technique are used to analyse the capacit... In this paper, the authors present an analytical model for coplanar waveguide on silicon-on-insulator substrate. The four-element topological network and the conformal mapping technique are used to analyse the capacitance and the conductance of the sandwich substrate. The validity of the model is verified by the full-wave method and the experimental data. It is found that the inductance, the resistance, the capacitance and the conductance from the analytical model show they are in good agreement with the corresponding values extracted from experimental Sparameter until 10 GHz. 展开更多
关键词 coplanar waveguide SILICON-ON-INSULATOR conformal mapping
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Tunable coplanar waveguide resonator with nanowires
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作者 周渝 郏涛 +6 位作者 翟计全 汪橙 钟先茜 曹志敏 孙国柱 康琳 吴培亨 《Chinese Physics B》 SCIE EI CAS CSCD 2015年第4期425-430,共6页
A tunable superconducting half-wavelength coplanar waveguide resonator (CPWR) with Nb parallel nanowires - 300 nm in width embedded in the center conductor was designed, fabricated, and measured. The frequency shift... A tunable superconducting half-wavelength coplanar waveguide resonator (CPWR) with Nb parallel nanowires - 300 nm in width embedded in the center conductor was designed, fabricated, and measured. The frequency shift and the amplitude attenuation of the resonance peak under irradiation of 404-nm pulse laser were observed with different light powers at 4.2 K. The RF power supplied to such a CPWR can serve as current bias, which will affect the light response of the resonator. 展开更多
关键词 coplanar waveguide NIOBIUM RESONATOR superconducting nanowire
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Superconducting tunable filter with constant bandwidth using coplanar waveguide resonators
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作者 蒋莹 李博 +3 位作者 魏斌 郭旭波 曹必松 姜立楠 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第10期472-476,共5页
In this paper we propose a two-pole varactor-tuned superconducting filter using coplanar waveguide (CPW) spiralin-spiral-out (SISO) resonators. Novel internal and external coupling structures are introduced to mee... In this paper we propose a two-pole varactor-tuned superconducting filter using coplanar waveguide (CPW) spiralin-spiral-out (SISO) resonators. Novel internal and external coupling structures are introduced to meet the requirements for a tunable filter with a constant absolute bandwidth. The fabricated device has a frequency tuning range of 14.4% at frequencies ranging from 274.1 MHz to 317.7 MHz, a 3-dB bandwidth of 5.14±0.06 MHz, and an insertion loss of 0.08 dB-0.70 dB. The simulated and measured results are in excellent agreement with each other. 展开更多
关键词 coplanar waveguide (CPW) SUPERCONDUCTING tunable filter VARACTOR
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Multi-Reconfigurable Band-Notched Coplanar Waveguide-Fed Slot Antenna
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作者 M.Lertwatechakul C.Benjangkaprasert 《Journal of Electronic Science and Technology》 CAS CSCD 2018年第1期74-78,共5页
This paper proposes an antenna design concept to achieve a multi-reconfigurable band-notch antenna by using a set of microswitches. The proposed idea was proved by the design of the coplanar waveguide(CPW)-fed slot an... This paper proposes an antenna design concept to achieve a multi-reconfigurable band-notch antenna by using a set of microswitches. The proposed idea was proved by the design of the coplanar waveguide(CPW)-fed slot antenna. The sample design gives a wideband antenna the impedance bandwidth of which covers the frequency ranged from 1.9 GHz to 6.55 GHz.The antenna could be configured to work either in single-band mode or in one of the defined dual-band modes. 展开更多
关键词 Antenna BAND-NOTCHED coplanar waveguide(CPW) RECONFIGURABLE
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Fabrication of Al air-bridge on coplanar waveguide
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作者 Zhen-Chuan Jin Hai-Teng Wu +1 位作者 Hai-Feng Yu Yang Yu 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第10期216-218,共3页
Superconducting coplanar waveguide(CPW) can be widely used as two-dimensional(2 D) resonator, transmission line or feedline, providing an important component for superconducting quantum circuit which is a promisin... Superconducting coplanar waveguide(CPW) can be widely used as two-dimensional(2 D) resonator, transmission line or feedline, providing an important component for superconducting quantum circuit which is a promising candidate for quantum information processing. Due to the discontinuities and asymmetries in the ground planes, CPW usually exhibits the spurious resonance, which is a common source of decoherence in circuit quantum electrodynamics experiments. To mitigate the spurious resonance, we fabricated superconducting aluminum air-bridges on Nb CPW. The fabricated airbridges are approximately 3 m high and up to 120 m long. Compared with other methods, the fabrication procedures of our air-bridges are simpler, and the air-bridge can withstand strong ultrasound. 展开更多
关键词 AIR-BRIDGE FABRICATION superconducting coplanar waveguide
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A novel and simple coplanar waveguide-fed planar monopole antenna for ultra-wideband applications
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作者 余勇军 《Journal of Chongqing University》 CAS 2006年第1期24-26,共3页
In this paper, a novel and simple CPW-fed planar monopole antenna is presented for UWB application. The antenna is fabricated on inexpensive FR4 substrate and fed by 50Ω CPW on the same layer, Measured data show that... In this paper, a novel and simple CPW-fed planar monopole antenna is presented for UWB application. The antenna is fabricated on inexpensive FR4 substrate and fed by 50Ω CPW on the same layer, Measured data show that the antenna provides an impedance bandwidth of about 8GHz for the return loss less than 10dB. It is also observed that the radiation pattems are nearly omni-directional over the entire frequency range. Details of the proposed antenna are presented, and simulated results are presented and discussed. 展开更多
关键词 UWB monopole antenna coplanar waveguide
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Conformal Wavelet Finite-difference Time-domain Algorithm for Analysis of Milimeter Wave Attenuation on Coplanar Waveguide
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作者 DAI Hong-quan CHEN Hai-yan 《Semiconductor Photonics and Technology》 CAS 2007年第3期206-209,共4页
Addressed is the calculation of millimeter wave attenuation on coplanar waveguide(CPW). A novel conformal wavelet finite-difference time-domain(CWFDTD) algorithm is proposed with emphasis on its application in calcula... Addressed is the calculation of millimeter wave attenuation on coplanar waveguide(CPW). A novel conformal wavelet finite-difference time-domain(CWFDTD) algorithm is proposed with emphasis on its application in calculation of millimeter wave attenuation on CPW, which is the combination of conformal algorithm dealing with the deformed cell with Wavelet-FDTD using multi-resolution analysis(MRA). Derived is the difference formulation for multi-resolution time domain(MRTD) based on Daubechies wavelets, and also given is the stability conditions for wavelet-FDTD algorithm. To validate its accuracy and efficiency, this novel method is applied to calculate the millimeter wave attenuation on lithium niobate CPW. Numerical results demonstrate that this new CWFDTD algorithm has the same accuracy with the conformal finite-difference time-domain(CFDTD) and conformal finite-difference time-domain based on alternating-direction implicit method(ADI-CFDTD), but saves computational time and computer memory. 展开更多
关键词 millimeter wave attenuation conformal wavelet FDTD algorithm multi-resolution analysis multi-resolution time domain coplanar waveguide
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Distributed parameter circuit model for wideband photodiodes with inductive coplanar waveguide electrodes 被引量:1
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作者 Yaru Han Bing Xiong +7 位作者 Changzheng Sun ZhibiaoHao Jian Wang Yan junHan Lai Wang Hongtao Li Jiadong Yu Yi Luo 《Chinese Optics Letters》 SCIE EI CAS CSCD 2020年第6期40-44,共5页
An equivalent circuit model including multi-section distributed parameters is proposed to analyze wideband photodiodes(PDs)with coplanar waveguide(CPW)electrodes.The model helps extract CPW parameters as well as intri... An equivalent circuit model including multi-section distributed parameters is proposed to analyze wideband photodiodes(PDs)with coplanar waveguide(CPW)electrodes.The model helps extract CPW parameters as well as intrinsic bandwidth parameters so that the influence of theCPW structure can be investigated,making it valuable for the design of high-performance PDs.PDs with an inductive 115Ωimpedance CPW are fabricated,and the 3 dB bandwidth is improved from 28 GHz to 37.5 GHz compared with PDs with a conventional 50Ωimpedance CPW. 展开更多
关键词 photodiodes PHOTODETECTOR high-impedance coplanar waveguide
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Electrically tunable liquid crystal coplanar waveguide 被引量:1
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作者 Xingye FAN Ruozhou LI +2 位作者 Jing YAN Yuming FANG Ying YU 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2021年第9期1270-1276,共7页
A tunable stepped-impedance resonator using liquid crystal is demonstrated.Two resonant frequencies at 3.367 and 7.198 GHz are realized and can be continuously tuned by external applied voltages.Continuous tunable ran... A tunable stepped-impedance resonator using liquid crystal is demonstrated.Two resonant frequencies at 3.367 and 7.198 GHz are realized and can be continuously tuned by external applied voltages.Continuous tunable ranges of 52 and 210 MHz have been achieved at a particularly low driving voltage of 14 V,which shows good agreement with the simulation results.The voltage-induced hysteresis phenomenon is also investigated.This device also has a low insertion loss of-2.9 and-4 dB for the two resonant frequencies and the return losses are less than-21.5 dB.This work provides a new protocol to realize a tunable frequency for communication systems. 展开更多
关键词 Tunable stepped-impedance resonator(SIR) Uquid crystal coplanar waveguide(CPW)
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A comparison study of on-chip short pulse generation circuits based on a coplanar waveguide
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作者 邹焕 耿永涛 +1 位作者 王平山 李家胤 《Chinese Physics C》 SCIE CAS CSCD 2011年第3期278-281,共4页
A few traditional pulse-forming circuits are implemented in a commercial 0.13 μm digital complementary-metal-oxide-semiconductor (CMOS) technology. These circuits, based on a coplanar waveguide, are analyzed and co... A few traditional pulse-forming circuits are implemented in a commercial 0.13 μm digital complementary-metal-oxide-semiconductor (CMOS) technology. These circuits, based on a coplanar waveguide, are analyzed and compared through CadenceTM Spectre simulations. The results show that these traditional pulse-forming-line (PFL) based circuits can be implemented in standard CMOS technology for short pulse generations. Further work is needed to explore the potential of the circuit techniques and to minimize parasitic effects. 展开更多
关键词 pulse generation circuit transmission line PFL CMOS coplanar waveguide
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A low-loss V-groove coplanar waveguide on an SOI substrate
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作者 赵宇航 童家榕 +1 位作者 曾璇 王勇 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2009年第7期51-53,共3页
A novel low-loss 50-Ω coplanar waveguide with V-groove on an SOI substrate is proposed.Through a CMOS-compatible process and anisotropic etching of silicon, surface silicon is removed from the SOI.The measured result... A novel low-loss 50-Ω coplanar waveguide with V-groove on an SOI substrate is proposed.Through a CMOS-compatible process and anisotropic etching of silicon, surface silicon is removed from the SOI.The measured results show that the V-groove coplanar waveguide causes about 50% less loss than the conventional one at a high frequency of up to 40 GHz. 展开更多
关键词 SOI coplanar waveguide low loss radio frequency
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Optimize Purcell filter design for reducing influence of fabrication variation
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作者 蔡晓 周翼彪 +2 位作者 于文龙 熊康林 冯加贵 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第6期589-594,共6页
To protect superconducting qubits and enable rapid readout, optimally designed Purcell filters are essential. To suppress the off-resonant driving of untargeted readout resonators, individual Purcell filters are used ... To protect superconducting qubits and enable rapid readout, optimally designed Purcell filters are essential. To suppress the off-resonant driving of untargeted readout resonators, individual Purcell filters are used for each readout resonator.However, achieving consistent frequency between a readout resonator and a Purcell filter is a significant challenge. A systematic computational analysis is conducted to investigate how fabrication variation affects filter performance, through focusing on the coupling capacitor structure and coplanar waveguide(CPW) transmission line specifications. The results indicate that the T-type enclosing capacitor(EC), which exhibits lower structural sensitivity, is more advantageous for achieving target capacitance than the C-type EC and the interdigital capacitor(IDC). By utilizing a large-sized CPW with the T-type EC structure, fluctuations in the effective coupling strength can be reduced to 10%, given typical micro-nanofabrication variances. The numerical simulations presented in this work minimize the influence of fabrication deviations, thereby significantly improving the reliability of Purcell filter designs. 展开更多
关键词 superconducting circuit Purcell filter coplanar waveguide capacitor structure
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A Fast and Accurate Method for the Analysis of Multi-conductor Coplanar Wave-Guide Transmission Lines
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作者 Ting Chen Xia Zhou Ying Li 《Advances in Manufacturing》 2000年第3期220-224,共5页
This paper introduces the complex image concept, and uses the method to analyze multi conductor coplanar waveguides. The method of spectral domain Green's function for modeling point charge and line charge struct... This paper introduces the complex image concept, and uses the method to analyze multi conductor coplanar waveguides. The method of spectral domain Green's function for modeling point charge and line charge structures is studied, in which Chebyshev polynomials are used as basis functions to solve the integral equation by the Galerkin's method. It is believed that the complex method has the features of accuracy and rapid convergence, and it is possible to make the technique useful as CAD tool for coplanar waveguide design. 展开更多
关键词 multiconductor coplanar waveguide complex image method Galerkin's method
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Quintuple Band Antenna for Wireless Applications with Small Form Factor 被引量:2
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作者 Amir Haider Tayyaba Khan +2 位作者 MuhibUr Rahman Byung Moo Lee Hyung Seok Kim 《Computers, Materials & Continua》 SCIE EI 2021年第3期2241-2251,共11页
A coplanar waveguide-fed quintuple band antenna with a slotted circular-shaped radiator for wireless applications with a high isolation between adjacent bands is presented in this paper.The proposed antenna resonates ... A coplanar waveguide-fed quintuple band antenna with a slotted circular-shaped radiator for wireless applications with a high isolation between adjacent bands is presented in this paper.The proposed antenna resonates at multiple frequencies with corresponding center frequencies of 2.35,4.92,5.75,6.52,and 8.46 GHz.The intended functionality is achieved by introducing a circular disc radiator with five slots and a U-shaped slot in the feed.The proposed antenna exhibits coverage of the maximum set of wireless applications,such as satellite communication,worldwide interoperability for microwave access,wireless local area network(WLAN),long-distance radio telecommunications,and X-band/Satcom wireless applications.The simulation and measurement results of the proposed fabricated antenna demonstrate the high isolation between adjacent bands.A stable realized gain with an advantageous radiation pattern is achieved at the operating frequency bands.The proposed simple design,compact structure,and simple feeding technique make this antenna suitable for integration in several wireless communication applications,where the portability of devices is a significant concern.The proposed antenna is anticipated to be an appropriate candidate for WLAN,long-term evolution,and fifth-generation mobile communication because of its multi-operational bands and compact size for handheld devices. 展开更多
关键词 coplanar waveguide isolated adjacent bands SATELLITE WIMAX WLAN 5G communication
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Ultra-wideband printed antennas for communication applications 被引量:2
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作者 钟顺时 梁仙灵 +2 位作者 姚风薇 汪伟 白晓峰 《Journal of Shanghai University(English Edition)》 CAS 2006年第1期48-52,共5页
A new type of ultra-wideband (UWB) printed monopole antennas is presented, which is composed of a circular or armular patch and a trapeziform ground plane with a tapered CPW feeder in the middle. Both simulated and ... A new type of ultra-wideband (UWB) printed monopole antennas is presented, which is composed of a circular or armular patch and a trapeziform ground plane with a tapered CPW feeder in the middle. Both simulated and experimental results are presented, showing good agreement and therefore verifying validity of the design. The proposed antenna with a circular monopole patch achieves an 11.6: 1 measured ratio bandwidth of VSWR ≤2 ( from 0,79 GHz to 9.16 GHz), while that with an annular patch obtains a measured ratio impedance bandwidth of 10.6:1 (from 0.87 GHz to 9.47 GHz). In addition, these designs exhibit nearly omnidirectional radiation patterns with simple compact structures, which axe attractive in communications and others UWB applications. 展开更多
关键词 ULTRA-WIDEBAND printed antenna monopole antenna coplanar waveguide.
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Modeling of terahertz pulse generation from LT-GaAs ultrafast photoconductive switches
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作者 Zhe Ma ongmei Ma +1 位作者 Chuntao Yang Keming Feng 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2011年第3期373-380,共8页
The technique of terahertz pulses generated from the photoconductive switches has been applied in the ultrafast electrical pulse metrology recently.A lumped-element theoretical model is established to describe the per... The technique of terahertz pulses generated from the photoconductive switches has been applied in the ultrafast electrical pulse metrology recently.A lumped-element theoretical model is established to describe the performance of the LT-GaAs ultrafast photoconductive switch used in the ultrafast pulse standard.The carrier transport processes of the photoexcited semiconductor,the attenuation and dispersion during terahertz pulse propagating are considered in the theoretical model.According to the experimental parameters,the waveforms of the generated terahertz pulses are calculated under optical excitations with different wavelengths of 840 nm and 450 nm,respectively.And comparisons between the theoretical results and the experimental results are carried out. 展开更多
关键词 terahertz pulse photoconductive switch coplanar waveguide LT-GaAs.
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Multiband printed monopole and dipole antenna with square-nested fractal
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作者 王丽娜 林澍 +2 位作者 蔡闰南 黄冠龙 张文彬 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2012年第6期53-58,共6页
A kind of novel muhiband antenna with square-nested fractal is proposed and designed, including printed monopole antenna and dipole antenna, which are nested with a series of similar square elements. The antennas can ... A kind of novel muhiband antenna with square-nested fractal is proposed and designed, including printed monopole antenna and dipole antenna, which are nested with a series of similar square elements. The antennas can synchronously operate in multiple frequencies, covering the four required frequencies, 2.4GHz/ 3.5GHz/5.2GHz/5.8GHz, for WLAN/WiMAX application. The antenna surface currents are simulated by CST MWS, a three-dimension full-wave electromagnetic simulator, and the multiband operating mechanism has been explained from analysis of the simulation results. Then the models of the two proposed antennas fed by coplanar waveguide (monopole antenna) and balanced microstripline (dipole antenna), respectively, have been obtained. Finally, prototypes of the two antennas have been manufactured and measured in anechoic chamber. The results well match the simulation results, which verifies the feasibility of design idea. Moreover, these antennas are miniature and the design idea can be easily applied into other types of nested structure, the features of which make the Proposed antennas have promising application in muhiband fields. 展开更多
关键词 multiband antenna fractal antenna coplanar waveguide balanced microstripline nested structure
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