Pub Date : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616838
Zhongliang Lu, Xue-xia Yang
In this paper a novel planar beam steering antenna controlled by reactive loads is proposed and designed based on the principle of electrically steerable parasitic array radiator antenna (ESPAR). The antenna prototype is designed using HFSS and the reactance values are optimized by the differential evolutionary (DE) algorithm. The main beam can be steered from -34° to 40° in the xoy plane by controlling the value of the loaded reactance. The frequency range of each state with S11 below -10dB is from 5.7GHz to 6.1GHz while the gain is from 3.5dBi to 4.9dBi.
{"title":"A novel planar beam steering antenna","authors":"Zhongliang Lu, Xue-xia Yang","doi":"10.1109/IEEE-IWS.2013.6616838","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616838","url":null,"abstract":"In this paper a novel planar beam steering antenna controlled by reactive loads is proposed and designed based on the principle of electrically steerable parasitic array radiator antenna (ESPAR). The antenna prototype is designed using HFSS and the reactance values are optimized by the differential evolutionary (DE) algorithm. The main beam can be steered from -34° to 40° in the xoy plane by controlling the value of the loaded reactance. The frequency range of each state with S11 below -10dB is from 5.7GHz to 6.1GHz while the gain is from 3.5dBi to 4.9dBi.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133583155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616737
By Amin Ezzeddine, A. Hung, E. Viveiros, Ho-Chung Huang
We report a high-performance GaN amplifier operating from 100MHz to 3,000MHz. The best results included 100W output power, 22dB gain with 40% power-added-efficiency from 100MHz to 3,000MHz. This performance is achieved by tailoring both the device impedance and by using unique wide-band circuit matching topology. Detailed design technique of both device and matching circuit will be presented.
{"title":"Ultra wide-band, high-power, high-efficiency GaN amplifier","authors":"By Amin Ezzeddine, A. Hung, E. Viveiros, Ho-Chung Huang","doi":"10.1109/IEEE-IWS.2013.6616737","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616737","url":null,"abstract":"We report a high-performance GaN amplifier operating from 100MHz to 3,000MHz. The best results included 100W output power, 22dB gain with 40% power-added-efficiency from 100MHz to 3,000MHz. This performance is achieved by tailoring both the device impedance and by using unique wide-band circuit matching topology. Detailed design technique of both device and matching circuit will be presented.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117210205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616725
Chenxi Zhao, Byungjoon Park, Yunsung Cho, Bumman Kim
A 1.75GHz CMOS Doherty power amplifier (PA) is presented. This Doherty PA uses voltage combining method that is different from the conventional current combining Doherty amplifier based on HBT. The output transformer is employed to combine the output power and realize the load modulation. The proposed CMOS Doherty PA is fabricated in 180nm CMOS process. Simulation results show that the output transformer acts as an impedance inverter and reduces the load impedance of carrier amplifier when the peaking amplifier turns, that meet the load modulation Doherty PA operation. The prototype achieves a maximum output power of +28.6dBm with a peak power-added efficiency (PAE) of 31.6% by using 3.4 V supply voltage. The PAE is kept above 25% over a 6 dB range of output power. It shows clearly the efficiency enhancement at the power back-off point due to the Doherty operation.
{"title":"Analysis and design of CMOS Doherty power amplifier using voltage combining method","authors":"Chenxi Zhao, Byungjoon Park, Yunsung Cho, Bumman Kim","doi":"10.1109/IEEE-IWS.2013.6616725","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616725","url":null,"abstract":"A 1.75GHz CMOS Doherty power amplifier (PA) is presented. This Doherty PA uses voltage combining method that is different from the conventional current combining Doherty amplifier based on HBT. The output transformer is employed to combine the output power and realize the load modulation. The proposed CMOS Doherty PA is fabricated in 180nm CMOS process. Simulation results show that the output transformer acts as an impedance inverter and reduces the load impedance of carrier amplifier when the peaking amplifier turns, that meet the load modulation Doherty PA operation. The prototype achieves a maximum output power of +28.6dBm with a peak power-added efficiency (PAE) of 31.6% by using 3.4 V supply voltage. The PAE is kept above 25% over a 6 dB range of output power. It shows clearly the efficiency enhancement at the power back-off point due to the Doherty operation.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114172349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper studies the opportunistic spectrum access (OSA) of secondary users in a large-scale overlay cognitive radio (CR) network. Particularly, a threshold-based protocol is investigated, where the secondary transmitter is allowed to access the spectrum only if the maximum signal power of the received pilots sent from the primary transmitters is lower than a certain threshold. To measure the resulting transmission opportunity for the secondary users by the proposed OSA protocol, the concept of spatial opportunity is introduced and evaluated by applying tools from stochastic geometry. Due to the interaction between the primary and secondary users under the proposed OSA protocol, an exact calculation of the coverage probabilities of the primary and secondary networks is infeasible. To tackle this difficulty, approximation is made on the distribution of the active secondary transmitters. Based on this approximation, the coverage performance of the overlay CR network under the proposed OSA protocol is characterized. Simulation results are provided to validate our analysis.
{"title":"Spatial opportunity in cognitive radio networks with primary transmitter assisted opportunistic spectrum access","authors":"Xiaoshi Song, Changchuan Yin, Danpu Liu, Rui Zhang","doi":"10.1109/IEEE-IWS.2013.6616817","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616817","url":null,"abstract":"This paper studies the opportunistic spectrum access (OSA) of secondary users in a large-scale overlay cognitive radio (CR) network. Particularly, a threshold-based protocol is investigated, where the secondary transmitter is allowed to access the spectrum only if the maximum signal power of the received pilots sent from the primary transmitters is lower than a certain threshold. To measure the resulting transmission opportunity for the secondary users by the proposed OSA protocol, the concept of spatial opportunity is introduced and evaluated by applying tools from stochastic geometry. Due to the interaction between the primary and secondary users under the proposed OSA protocol, an exact calculation of the coverage probabilities of the primary and secondary networks is infeasible. To tackle this difficulty, approximation is made on the distribution of the active secondary transmitters. Based on this approximation, the coverage performance of the overlay CR network under the proposed OSA protocol is characterized. Simulation results are provided to validate our analysis.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115612304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616826
Xingchen Guo, Q. Chu
A wideband dual-polarized antenna for LTE (Long Term Evolution) communication system is presented. The antenna is excited by inverted L-shaped strip feed line. A wide impedance bandwidth operating from the frequency 1.71GHz to 2.69 GHz with Voltage Standing Wave Ratio(VSWR) less than 1.5 is achieved. The isolation of the antenna between the two input ports is over 40dB. Stable radiation patterns with low cross-polarized, low backlobe radiation and gain of 9dBi have been obtained across the entire operating frequency bands.
{"title":"Wideband dual-polarized base station antenna with high isolation and low cross polarization for LTE communication system","authors":"Xingchen Guo, Q. Chu","doi":"10.1109/IEEE-IWS.2013.6616826","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616826","url":null,"abstract":"A wideband dual-polarized antenna for LTE (Long Term Evolution) communication system is presented. The antenna is excited by inverted L-shaped strip feed line. A wide impedance bandwidth operating from the frequency 1.71GHz to 2.69 GHz with Voltage Standing Wave Ratio(VSWR) less than 1.5 is achieved. The isolation of the antenna between the two input ports is over 40dB. Stable radiation patterns with low cross-polarized, low backlobe radiation and gain of 9dBi have been obtained across the entire operating frequency bands.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115221420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616747
Jiawen Sun, Qing Hao, Zhenghe Feng, Wanshun Jiang
A novel dielectric resonator antenna oscillator (DRAO), which realizes dielectric resonator antenna (DRA) and dielectric resonator oscillator (DRO) simultaneously, is presented in this paper. The design procedure of the parallel-feedback type DRAO at dedicated short range communications band is discussed. Firstly, the DRA was three-dimensional simulated by HFSS. Then the DRO was designed based on the negative resistance theory, using the ADS software for optimization and nonlinear analysis. Finally, it was integrated in the on-board unit (OBU) of electronic toll collection (ETC) system. The experimental results of the OBU show that the performance of the DROA is well and it can be used in real ETC system.
{"title":"Design and investigation of dielectric resonator antenna oscillator (DRAO) in electronic toll collection (ETC) system","authors":"Jiawen Sun, Qing Hao, Zhenghe Feng, Wanshun Jiang","doi":"10.1109/IEEE-IWS.2013.6616747","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616747","url":null,"abstract":"A novel dielectric resonator antenna oscillator (DRAO), which realizes dielectric resonator antenna (DRA) and dielectric resonator oscillator (DRO) simultaneously, is presented in this paper. The design procedure of the parallel-feedback type DRAO at dedicated short range communications band is discussed. Firstly, the DRA was three-dimensional simulated by HFSS. Then the DRO was designed based on the negative resistance theory, using the ADS software for optimization and nonlinear analysis. Finally, it was integrated in the on-board unit (OBU) of electronic toll collection (ETC) system. The experimental results of the OBU show that the performance of the DROA is well and it can be used in real ETC system.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116747856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616748
Yue-min Ning, Wanshun Jiang, Qinglin Zhu
A new millimeter wave spatial power combiner based on broadband multi-way ridged waveguides is designed. The device is composed of a multi-step impedance transformer and eight ridged waveguides. Since the ridged waveguides provide a consistent impedance transformation and a broad band working frequency, a millimeter wave solid-state power amplifier based on the combiner demonstrates an output power of more than 5 W at 40 GHz and greater than 10 W over the 30 GHz to 34 GHz band. Measured results show that all the ridged waveguides have the high uniformity of amplitude and phase, and the combiner has demonstrated operation over a broadband of 30 GHz to 40 GHz with more than 10 dB return loss and less than 0.8 dB insertion loss.
{"title":"Design of a new millimeter wave power combiner based on multi-way ridged waveguides","authors":"Yue-min Ning, Wanshun Jiang, Qinglin Zhu","doi":"10.1109/IEEE-IWS.2013.6616748","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616748","url":null,"abstract":"A new millimeter wave spatial power combiner based on broadband multi-way ridged waveguides is designed. The device is composed of a multi-step impedance transformer and eight ridged waveguides. Since the ridged waveguides provide a consistent impedance transformation and a broad band working frequency, a millimeter wave solid-state power amplifier based on the combiner demonstrates an output power of more than 5 W at 40 GHz and greater than 10 W over the 30 GHz to 34 GHz band. Measured results show that all the ridged waveguides have the high uniformity of amplitude and phase, and the combiner has demonstrated operation over a broadband of 30 GHz to 40 GHz with more than 10 dB return loss and less than 0.8 dB insertion loss.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127935654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616766
Silong Zhang, He Sun, Wen-hua Chen, Zhenghe Feng, Zhenyu Xiao, N. Ge
This paper describes an experiment to extract the dynamic nonlinear model of a millimeter-wave communication system with ultra-wideband signal. The device under test consists of a pair of 60 GHz RF transmitter and receiver and the wireless channel between them. Input and output signals used to extract the behavioral model are the baseband signals before imported to the transmitter and after demodulated by the receiver, respectively. The experiment is based on QPSK modulated signals with 200MHz bandwidth and 4.6dB peak-to-average power ratio (PAPR). With a Joint memory polynomials (JMPs) model, the normalized mean square error (NMSE) between the simulation and measurement output reached -22.4dB. To the authors' best knowledge, this is the first report on a behavioral model with such wideband signal.
{"title":"An experiment to extract the dynamic nonlinear model of a millimeter wave communication system with ultra-wideband signal","authors":"Silong Zhang, He Sun, Wen-hua Chen, Zhenghe Feng, Zhenyu Xiao, N. Ge","doi":"10.1109/IEEE-IWS.2013.6616766","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616766","url":null,"abstract":"This paper describes an experiment to extract the dynamic nonlinear model of a millimeter-wave communication system with ultra-wideband signal. The device under test consists of a pair of 60 GHz RF transmitter and receiver and the wireless channel between them. Input and output signals used to extract the behavioral model are the baseband signals before imported to the transmitter and after demodulated by the receiver, respectively. The experiment is based on QPSK modulated signals with 200MHz bandwidth and 4.6dB peak-to-average power ratio (PAPR). With a Joint memory polynomials (JMPs) model, the normalized mean square error (NMSE) between the simulation and measurement output reached -22.4dB. To the authors' best knowledge, this is the first report on a behavioral model with such wideband signal.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131147355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616726
Wen‐Jun Lu, Hongbo Zhu
Design concept of an implantable, balanced slot-dipole composite antenna is proposed and simulated. The antenna is composed of a tapered slot element and a symmetrical dipole and embedded in a planar stratified phantom. The reflection coefficiency, radiation pattern and gain of the antenna are simulated. It is shown that the antenna can operate at 402-405MHz, 433MHz, 902-928MHz and 2400-2500MHz bands for return loss larger than 10dB. The antenna should be useful for implantable, multi-band medical implant communication service (MICS) and industrial, scientific and medical (ISM) applications.
{"title":"Balanced implantable slot-dipole composite antenna for multiband biomedical applications","authors":"Wen‐Jun Lu, Hongbo Zhu","doi":"10.1109/IEEE-IWS.2013.6616726","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616726","url":null,"abstract":"Design concept of an implantable, balanced slot-dipole composite antenna is proposed and simulated. The antenna is composed of a tapered slot element and a symmetrical dipole and embedded in a planar stratified phantom. The reflection coefficiency, radiation pattern and gain of the antenna are simulated. It is shown that the antenna can operate at 402-405MHz, 433MHz, 902-928MHz and 2400-2500MHz bands for return loss larger than 10dB. The antenna should be useful for implantable, multi-band medical implant communication service (MICS) and industrial, scientific and medical (ISM) applications.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127604485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616825
Jinrong Mao, W. Che, Wai‐Wa Choi, K. Tam, Q. Xue
A fully tunable bandpass filter using tunable transformers and multiple mode resonators (MMRs) is proposed. The proposed tunable MMR makes it possible to realize wide-band tunable filters. Thus the tuning ranges of the center frequency and bandwidth are wide. The novel tunable transformer may help to get the desired external quality factor (Qe) while the center frequency or bandwidth is tuned. Thus a good passband performance may be got.
{"title":"Fully tunable filter design using tunable transformers and multiple mode resonators","authors":"Jinrong Mao, W. Che, Wai‐Wa Choi, K. Tam, Q. Xue","doi":"10.1109/IEEE-IWS.2013.6616825","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616825","url":null,"abstract":"A fully tunable bandpass filter using tunable transformers and multiple mode resonators (MMRs) is proposed. The proposed tunable MMR makes it possible to realize wide-band tunable filters. Thus the tuning ranges of the center frequency and bandwidth are wide. The novel tunable transformer may help to get the desired external quality factor (Qe) while the center frequency or bandwidth is tuned. Thus a good passband performance may be got.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121352606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：