Pub Date : 2013-04-14DOI: 10.1109/IEEE-IWS.2013.6616837
Fang Zhang, F. Meng, Jong‐Chul Lee, Qun Wu
A compact novel topology rectenna system is presented. The proposed rectenna is developed by decomposition a rectenna topology into two function parts, and then re-combination the two parts into a new topology to reach a very compact system size. The operation mechanism of the proposed novel topology rectenna is explained and analyzed. In addition, the proposed architecture is uni-planar, robust and compact, which lead to an easy design and realization at the required frequency ranges with a very low cost. A 2.45 GHz rectenna system is designed and measured to show their microwave performances.
{"title":"Study of a novel compact rectenna for wireless energy harvesting","authors":"Fang Zhang, F. Meng, Jong‐Chul Lee, Qun Wu","doi":"10.1109/IEEE-IWS.2013.6616837","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616837","url":null,"abstract":"A compact novel topology rectenna system is presented. The proposed rectenna is developed by decomposition a rectenna topology into two function parts, and then re-combination the two parts into a new topology to reach a very compact system size. The operation mechanism of the proposed novel topology rectenna is explained and analyzed. In addition, the proposed architecture is uni-planar, robust and compact, which lead to an easy design and realization at the required frequency ranges with a very low cost. A 2.45 GHz rectenna system is designed and measured to show their microwave performances.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"28 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":"114691002","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.2013.6616805
Wanyi Guo, Lianxing He, Xiaowei Sun
The design, fabrication and measurement of a broad/dual-band terahertz (THz) metamaterial based on gallium arsenide substrate are presented. The proposed Modified Split-Ring Resonator (MSRR) provides two distinct strong electrically resonances near 0.515 THz and 0.74 THz. Effective medium parameters show negative values of permittivity during two broad frequency bands of 0.492-0.693 THz and 0.727-0.811 THz. Measured results obtained from the Terahertz time-domain spectroscopy (THz-TDS) show good agreement with the simulation results. This metamaterial is expected to enhance the realization of broadband and multi-band functional materials and devices in THz regime.
{"title":"A broad/dual-band terahertz metamaterial","authors":"Wanyi Guo, Lianxing He, Xiaowei Sun","doi":"10.1109/IEEE-IWS.2013.6616805","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616805","url":null,"abstract":"The design, fabrication and measurement of a broad/dual-band terahertz (THz) metamaterial based on gallium arsenide substrate are presented. The proposed Modified Split-Ring Resonator (MSRR) provides two distinct strong electrically resonances near 0.515 THz and 0.74 THz. Effective medium parameters show negative values of permittivity during two broad frequency bands of 0.492-0.693 THz and 0.727-0.811 THz. Measured results obtained from the Terahertz time-domain spectroscopy (THz-TDS) show good agreement with the simulation results. This metamaterial is expected to enhance the realization of broadband and multi-band functional materials and devices in THz regime.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"47 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":"114901818","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.2013.6616756
He Zhu, Sai‐Wai Wong, Shenjie Wen, Q. Chu
An ultra-wideband (UWB) bandpass filter is proposed in this paper. The proposed structure composes of two pairs of microstrip short-circuited stubs which provide a microstrip-to-CPW transition, and a CPW resonator whose length is about half-guided-wavelength (λg/2) at 6.85GHz. A triple-mode UWB bandpass filter is produced using this microstrip-to-CPW transition structure. In order to suppress WLAN signals around 5.2/5.8GHz, a novel via-stub-loaded structure is designed. By adding this via-stub-loaded structure, a bandstop characteristic is formed as a notch-band whose position and bandwidth could be tuned easily. Simulation results indicate that the reflection loss is lower than -15dB in desired passband, and it also achieves a good performance of the notch-band around 5.2/5.8GHz. Finally, the proposed UWB bandpass filter is fabricated and measured. The measured results are in good agreement with simulated ones.
{"title":"An ultra-wideband (UWB) bandpass filter with microstrip-to-CPW transition and a notch-band","authors":"He Zhu, Sai‐Wai Wong, Shenjie Wen, Q. Chu","doi":"10.1109/IEEE-IWS.2013.6616756","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616756","url":null,"abstract":"An ultra-wideband (UWB) bandpass filter is proposed in this paper. The proposed structure composes of two pairs of microstrip short-circuited stubs which provide a microstrip-to-CPW transition, and a CPW resonator whose length is about half-guided-wavelength (λg/2) at 6.85GHz. A triple-mode UWB bandpass filter is produced using this microstrip-to-CPW transition structure. In order to suppress WLAN signals around 5.2/5.8GHz, a novel via-stub-loaded structure is designed. By adding this via-stub-loaded structure, a bandstop characteristic is formed as a notch-band whose position and bandwidth could be tuned easily. Simulation results indicate that the reflection loss is lower than -15dB in desired passband, and it also achieves a good performance of the notch-band around 5.2/5.8GHz. Finally, the proposed UWB bandpass filter is fabricated and measured. The measured results are in good agreement with simulated ones.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"73 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":"124774466","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.2013.6616734
R. Luo, Xuefei Bai, Shengxi Diao, F. Lin
This paper presents a low-power intermediate frequency (IF) limiting amplifier (LA) and received signal strength indicator (RSSI). The LA and RSSI are designed for ZigBee™ receiver at 2MHz IF. To save power, two local loops for offset correction are used in LA chain and a sensitivity of -56dBm is achieved. Each LA gain stage employs cascade diodes load to avoid driving the diode load into velocity saturation region. The indication rang is 50dB within ±2dB linearity error. The core area is 0.11×0.31mm2 using a SMIC 0.18-μm CMOS technology. The overall power consumption is 1mW from a 1.8V supply voltage.
{"title":"A 1mW CMOS limiting amplifier and RSSI for ZigBee™ applications","authors":"R. Luo, Xuefei Bai, Shengxi Diao, F. Lin","doi":"10.1109/IEEE-IWS.2013.6616734","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616734","url":null,"abstract":"This paper presents a low-power intermediate frequency (IF) limiting amplifier (LA) and received signal strength indicator (RSSI). The LA and RSSI are designed for ZigBee™ receiver at 2MHz IF. To save power, two local loops for offset correction are used in LA chain and a sensitivity of -56dBm is achieved. Each LA gain stage employs cascade diodes load to avoid driving the diode load into velocity saturation region. The indication rang is 50dB within ±2dB linearity error. The core area is 0.11×0.31mm2 using a SMIC 0.18-μm CMOS technology. The overall power consumption is 1mW from a 1.8V supply voltage.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"1 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":"124674712","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.2013.6616727
Yun-Chih Lu, Tang-Nian Luo, Jau-Horng Chen, Y. Chen
This paper presents a 77-GHz low-noise amplifier implemented in 65-nm digital CMOS process for automotive radar application. Due to the lack of high frequency transistor model, curve fitting of the measured S-parameters has been done to obtain accurate simulation results. The transistor model is modified with additional parasitic extraction and bias-dependent components. The LNA is composed of three cascode stages connected in cascade and the matching networks are composed of microstrip transmission lines and MOM capacitors. The 77-GHz LNA achieves a power gain of 17.6 dB and average noise figure of 5.9 dB. The 3-dB bandwidth of the LNA is from 70 GHz to 87 GHz. The measured input and output return loss is better than 10 dB at 77 GHz. The LNA consumes 20 mW from a 1.2 V supply voltage.
{"title":"A 77-GHz LNA for automotive radar application","authors":"Yun-Chih Lu, Tang-Nian Luo, Jau-Horng Chen, Y. Chen","doi":"10.1109/IEEE-IWS.2013.6616727","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616727","url":null,"abstract":"This paper presents a 77-GHz low-noise amplifier implemented in 65-nm digital CMOS process for automotive radar application. Due to the lack of high frequency transistor model, curve fitting of the measured S-parameters has been done to obtain accurate simulation results. The transistor model is modified with additional parasitic extraction and bias-dependent components. The LNA is composed of three cascode stages connected in cascade and the matching networks are composed of microstrip transmission lines and MOM capacitors. The 77-GHz LNA achieves a power gain of 17.6 dB and average noise figure of 5.9 dB. The 3-dB bandwidth of the LNA is from 70 GHz to 87 GHz. The measured input and output return loss is better than 10 dB at 77 GHz. The LNA consumes 20 mW from a 1.2 V supply voltage.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"58 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":"124790064","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.2013.6616843
Xiaomeng Gao, Aditya Singh, O. Boric-Lubecke, V. Lubecke
Measurement accuracy of the displacement from human cardiopulmonary activities has potential in predicting physiological information for the purpose of biomedical remote sensing and non-contact monitoring. In this paper, an RF frequency doubling tag was used for detecting small displacement with high accuracy. A heterodyne and a homodyne quadrature radar receiving systems were used to detect small scale tag motion and non-tagged motion from a distance, respectively. Arctangent demodulation algorithm and imbalance compensation technique were applied to the raw radar data for displacement estimation. Simulation and experimental results were compared, indicating that by using the frequency doubling tag, a better accuracy can be achieved for small displacement estimation with Doppler radar.
{"title":"Small-scale displacement measurement with passive harmonic RF tag using Doppler radar","authors":"Xiaomeng Gao, Aditya Singh, O. Boric-Lubecke, V. Lubecke","doi":"10.1109/IEEE-IWS.2013.6616843","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616843","url":null,"abstract":"Measurement accuracy of the displacement from human cardiopulmonary activities has potential in predicting physiological information for the purpose of biomedical remote sensing and non-contact monitoring. In this paper, an RF frequency doubling tag was used for detecting small displacement with high accuracy. A heterodyne and a homodyne quadrature radar receiving systems were used to detect small scale tag motion and non-tagged motion from a distance, respectively. Arctangent demodulation algorithm and imbalance compensation technique were applied to the raw radar data for displacement estimation. Simulation and experimental results were compared, indicating that by using the frequency doubling tag, a better accuracy can be achieved for small displacement estimation with Doppler radar.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"29 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":"126681117","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.2013.6616757
He Zhu, Q. Chu
An ultra-wideband (UWB) bandpass filter with a notch-band and wide upper stopband is presented in this paper. The UWB filter is realized using a ring resonator which is loaded with two sets of stubs, i.e. one is loaded in the center and two little stubs at the symmetrical side locations. The loaded stubs are used to create transmission zeros in upper stopband thus high modes are suppressed greatly. Moreover, two identical meandered resonators are inserted within the stub-loaded ring resonator, creating a notch-band around 5.8 GHz. Finally, two UWB filters with and without notch-band are simulated, fabricated, and measured results provide an experimental validation of predicted performance of the filter.
{"title":"Ultra-wideband (UWB) bandpass filter based on stub-loaded ring resonator","authors":"He Zhu, Q. Chu","doi":"10.1109/IEEE-IWS.2013.6616757","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616757","url":null,"abstract":"An ultra-wideband (UWB) bandpass filter with a notch-band and wide upper stopband is presented in this paper. The UWB filter is realized using a ring resonator which is loaded with two sets of stubs, i.e. one is loaded in the center and two little stubs at the symmetrical side locations. The loaded stubs are used to create transmission zeros in upper stopband thus high modes are suppressed greatly. Moreover, two identical meandered resonators are inserted within the stub-loaded ring resonator, creating a notch-band around 5.8 GHz. Finally, two UWB filters with and without notch-band are simulated, fabricated, and measured results provide an experimental validation of predicted performance of the filter.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"633 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114000120","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.2013.6616785
Yuan Chun Li, Q. Xue
This paper presents a novel power divider integrated with bandpass filters (BPFs). It splits the power equally and selects the desired frequency spectrum at the same time. Besides, the device could suppress the harmonic in a wide band. The centrally loaded BPFs are employed to replace the impedance transformers of power divider. The isolation elements are placed at the center of the symmetric plane to produce the good isolation between output ports. The design is fabricated and measured and the agreement between the simulated and measured results demonstrates the method.
{"title":"Dual-functional power divider with harmonic suppression","authors":"Yuan Chun Li, Q. Xue","doi":"10.1109/IEEE-IWS.2013.6616785","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616785","url":null,"abstract":"This paper presents a novel power divider integrated with bandpass filters (BPFs). It splits the power equally and selects the desired frequency spectrum at the same time. Besides, the device could suppress the harmonic in a wide band. The centrally loaded BPFs are employed to replace the impedance transformers of power divider. The isolation elements are placed at the center of the symmetric plane to produce the good isolation between output ports. The design is fabricated and measured and the agreement between the simulated and measured results demonstrates the method.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"72 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":"125782998","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.2013.6616841
J. Hwang, C. Goldsmith
This paper reviews the progress over the past decade in improving the reliability of MEMS capacitive switches. The emphasis is on mitigating the dielectric-charging problem as it currently limits the lifetime of these switches. The most critical is to distinguish charging of the dielectric surface from that of the dielectric bulk, and then mitigate them separately. Once surface charging is eliminated and bulk charging is greatly reduced, the switch lifetime can be prolonged almost indefinitely by using an intelligent closed-loop CMOS control circuit. This will facilitate the use of MEMS capacitive switches in military and commercial systems.
{"title":"Reliability of MEMS capacitive switches","authors":"J. Hwang, C. Goldsmith","doi":"10.1109/IEEE-IWS.2013.6616841","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616841","url":null,"abstract":"This paper reviews the progress over the past decade in improving the reliability of MEMS capacitive switches. The emphasis is on mitigating the dielectric-charging problem as it currently limits the lifetime of these switches. The most critical is to distinguish charging of the dielectric surface from that of the dielectric bulk, and then mitigate them separately. Once surface charging is eliminated and bulk charging is greatly reduced, the switch lifetime can be prolonged almost indefinitely by using an intelligent closed-loop CMOS control circuit. This will facilitate the use of MEMS capacitive switches in military and commercial systems.","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":"128148586","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.2013.6616810
K. Kawase, S. Fan, S. Hayashi
Among our research activities for high power THz sources, we can mention: Injection-seeded THz parametric generator (is-TPG); Cherenkov type phase matched optical rectification using LiNbO3 ridge waveguide, and collinear phase matched optical rectification using DAST crystal, etc. Recently, we have succeeded in the development of a high-peak-power, single-longitudinal-mode and widely-tunable is-TPG using LiNbO3 pumped by an amplified microchip Nd:YAG laser. The THz-wave output >1kW was assured by a calibrated pyroelectric detector. We also succeeded in a highly sensitive detection of THz-waves emitted from is-TPG using LiNbO3 as a detector.
{"title":"Nonlinear optical THz sources and applications (invited)","authors":"K. Kawase, S. Fan, S. Hayashi","doi":"10.1109/IEEE-IWS.2013.6616810","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616810","url":null,"abstract":"Among our research activities for high power THz sources, we can mention: Injection-seeded THz parametric generator (is-TPG); Cherenkov type phase matched optical rectification using LiNbO3 ridge waveguide, and collinear phase matched optical rectification using DAST crystal, etc. Recently, we have succeeded in the development of a high-peak-power, single-longitudinal-mode and widely-tunable is-TPG using LiNbO3 pumped by an amplified microchip Nd:YAG laser. The THz-wave output >1kW was assured by a calibrated pyroelectric detector. We also succeeded in a highly sensitive detection of THz-waves emitted from is-TPG using LiNbO3 as a detector.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"04 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":"129254703","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：