Pub Date : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616758
Sai‐Wai Wong, Weiwei Liao, K. Wang, Q. Chu
A compact ultra-wideband (UWB) bandpass filter (BPF) with three transmission zeros in the notched-band is presented in this paper. A dual coupled microstrip/coplanar waveguide (CPW) structure with slotlines on the bottom are used. The notched-band is generated by a pair of small U-shaped slot-line on the bottom layer and a hollow microstrip resonator on the top layer, and three transmission zeros are achieved at frequency 5.85GHz, 5.9GHz, 5.95GHz without extra circuit size. The UWB bandpass filter (BPF) has been designed, fabricated and measured. The measured results agree with the simulated result closely.
{"title":"Ultra-wideband (UWB) bandpass filter with three transmission zeros in the notched band","authors":"Sai‐Wai Wong, Weiwei Liao, K. Wang, Q. Chu","doi":"10.1109/IEEE-IWS.2013.6616758","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616758","url":null,"abstract":"A compact ultra-wideband (UWB) bandpass filter (BPF) with three transmission zeros in the notched-band is presented in this paper. A dual coupled microstrip/coplanar waveguide (CPW) structure with slotlines on the bottom are used. The notched-band is generated by a pair of small U-shaped slot-line on the bottom layer and a hollow microstrip resonator on the top layer, and three transmission zeros are achieved at frequency 5.85GHz, 5.9GHz, 5.95GHz without extra circuit size. The UWB bandpass filter (BPF) has been designed, fabricated and measured. The measured results agree with the simulated result closely.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"19 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":"121032283","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}
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.2013.6616726
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.2013.6616838
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.2013.6616766
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.2013.6616771
Jian-Quan Huang, Q. Chu, Qiao-Lai Tan
Compact hybrid coupler utilizing the slow-wave structure has been proposed. The linear phase characteristic of the slow-wave structure was achieved by using the mixed structure of the lattice and pi-shaped topology. The fabricated coupler demonstrates the evident size reduction (55%) with a little performance degradation due to the linear phase characteristic of the slow-wave structure over wideband.
{"title":"Compact hybrid coupler based on mixed-lattice slow-wave transmission line","authors":"Jian-Quan Huang, Q. Chu, Qiao-Lai Tan","doi":"10.1109/IEEE-IWS.2013.6616771","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616771","url":null,"abstract":"Compact hybrid coupler utilizing the slow-wave structure has been proposed. The linear phase characteristic of the slow-wave structure was achieved by using the mixed structure of the lattice and pi-shaped topology. The fabricated coupler demonstrates the evident size reduction (55%) with a little performance degradation due to the linear phase characteristic of the slow-wave structure over wideband.","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":"132813872","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.2013.6616706
P. He, Lian Zhao, Jianhua Lu
This paper considers a cognitive radio (CR) network, in which the unlicensed (secondary) users (SUs) are allowed to concurrently access the spectrum allocated to the licensed (primary) users provided that their interference to the primary users (PUs) satisfies certain constraints. Under ensuring the quality of service (QoS) of the PUs, the precious spectrum resource can be utilized by maximizing the sum-rate and optimizing power allocation of the SUs. On the other hand, the multiple-antenna mobile user case needs further investigating for the problem mentioned above. Thus, we simply term this setting as multiple input multiple output multiple access channels (MIMO-MAC) in the CR Networks. To effectively and efficiently optimize the power allocation of the SUs, a tight pair of upper and lower bounds, as an interval, of the optimal Lagrange multiplier is proposed. Furthermore, a novel water-filling is proposed for the inner loop computation of the proposed problem. It is shown that the new water-filling can obtain the exact solution with a few finite computations. Therefore, not only is convergence of the proposed algorithm guaranteed, but efficient computation is also provided by the proposed algorithm.
本文研究了一种认知无线电(CR)网络，在该网络中，只要未授权的(辅助)用户对主用户的干扰满足一定的约束条件，就允许未授权的(辅助)用户(su)并发地访问分配给授权的(主)用户的频谱。在保证单板的QoS (quality of service)的前提下，通过最大化单板的求和速率和优化功率分配，可以充分利用宝贵的频谱资源。另一方面，对于上述问题，多天线移动用户案例需要进一步研究。因此，我们简单地将这种设置称为CR网络中的多输入多输出多访问通道(MIMO-MAC)。为了有效地优化单元的功率分配，提出了最优拉格朗日乘子的紧对上界和下界作为区间。在此基础上，提出了一种新的充水方法，用于该问题的内环计算。结果表明，这种新的充水方法只需少量的有限次计算即可得到精确解。因此，该算法不仅保证了算法的收敛性，而且提供了高效的计算能力。
{"title":"Efficient optimal power allocation for MIMO MAC in cognitive radio networks","authors":"P. He, Lian Zhao, Jianhua Lu","doi":"10.1109/IEEE-IWS.2013.6616706","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616706","url":null,"abstract":"This paper considers a cognitive radio (CR) network, in which the unlicensed (secondary) users (SUs) are allowed to concurrently access the spectrum allocated to the licensed (primary) users provided that their interference to the primary users (PUs) satisfies certain constraints. Under ensuring the quality of service (QoS) of the PUs, the precious spectrum resource can be utilized by maximizing the sum-rate and optimizing power allocation of the SUs. On the other hand, the multiple-antenna mobile user case needs further investigating for the problem mentioned above. Thus, we simply term this setting as multiple input multiple output multiple access channels (MIMO-MAC) in the CR Networks. To effectively and efficiently optimize the power allocation of the SUs, a tight pair of upper and lower bounds, as an interval, of the optimal Lagrange multiplier is proposed. Furthermore, a novel water-filling is proposed for the inner loop computation of the proposed problem. It is shown that the new water-filling can obtain the exact solution with a few finite computations. Therefore, not only is convergence of the proposed algorithm guaranteed, but efficient computation is also provided by the proposed algorithm.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"53 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":"131657806","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.2013.6616796
J. Moghaddasi, K. Wu
A multifunctional transceiver for integrated radar sensing and radio communication (or simply termed RadCom) systems is developed in the time domain. It is a robust alternative of the previous architecture for a smart system that operates jointly as radar or radio in consecutive time slots. Following a system design approach, a low-frequency prototype of the proposed transceiver is realized and its performance is evaluated. Within the radar mode, the added ability of target detection as well as improved range resolution against the previously demonstrated version makes the system suitable for driving assistance applications. Within the radio mode, it has proved a great capability of communication at a data rate of 25Mbps.
{"title":"Improved joint radar-radio (RadCom) transceiver for future intelligent transportation platforms and highly mobile high-speed communication systems","authors":"J. Moghaddasi, K. Wu","doi":"10.1109/IEEE-IWS.2013.6616796","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616796","url":null,"abstract":"A multifunctional transceiver for integrated radar sensing and radio communication (or simply termed RadCom) systems is developed in the time domain. It is a robust alternative of the previous architecture for a smart system that operates jointly as radar or radio in consecutive time slots. Following a system design approach, a low-frequency prototype of the proposed transceiver is realized and its performance is evaluated. Within the radar mode, the added ability of target detection as well as improved range resolution against the previously demonstrated version makes the system suitable for driving assistance applications. Within the radio mode, it has proved a great capability of communication at a data rate of 25Mbps.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"70 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":"131682343","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}
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