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.2013.6616727
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.2013.6616785
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.2013.6616734
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.2013.6616842
A. Guntupalli, K. Wu
This research presents two novel techniques for obtaining the pattern and polarization agilities simultaneously. 35 GHz dual linearly polarized (DLP) antenna array is designed and the gain for each polarization is measured to be 18 dBi with a cross-polarization level of 20 dB between the two polarization states. 60 GHz Dual circularly polarized (DCP) antenna array is designed and the gain for each CP state is obtained as 13 dBc with a cross polarization level of 15 dB. Analog phase shifter based on the Butler matrix is used to drive each state of polarization. The designed DLP and DCP phased array systems are able to form beams in two dimensional (2-D) scan space. These millimeter-wave phased array systems with polarization agility will satisfy today's cognitive radio front-end requirements.
{"title":"Millimeter-wave phased array antenna for high throughput two-dimensional scan cognitive radio","authors":"A. Guntupalli, K. Wu","doi":"10.1109/IEEE-IWS.2013.6616842","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616842","url":null,"abstract":"This research presents two novel techniques for obtaining the pattern and polarization agilities simultaneously. 35 GHz dual linearly polarized (DLP) antenna array is designed and the gain for each polarization is measured to be 18 dBi with a cross-polarization level of 20 dB between the two polarization states. 60 GHz Dual circularly polarized (DCP) antenna array is designed and the gain for each CP state is obtained as 13 dBc with a cross polarization level of 15 dB. Analog phase shifter based on the Butler matrix is used to drive each state of polarization. The designed DLP and DCP phased array systems are able to form beams in two dimensional (2-D) scan space. These millimeter-wave phased array systems with polarization agility will satisfy today's cognitive radio front-end requirements.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"17 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":"128385638","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.2013.6616837
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.2013.6616841
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.2013.6616701
Haoran Zhu, J. Mao, Jianjie Li
In this paper, a novel power plane of electromagnetic bandgap (EBG) structure for wideband mitigation of simultaneous switching noise (SSN) in mixed signal systems is proposed. Complementary split ring resonator (CSRR) with inherent filtering characteristic is utilized for constituting EBG unit cells. From the simulated and measured results of the proposed EBG structure, a wideband suppression of SSN ranges from 0.56 GHz to 5.88 GHz is achieved with a high mitigation level of -40 dB. Furthermore, the influence of the proposed power plane of EBG structure on the signal integrity (SI) is investigated in the time and frequency domains, respectively. The results show that the SI performance can be improved significantly by using differential pairs for the signals.
{"title":"Signal and power integrity analysis for the novel power plane of EBG structure in high-speed mixed signal systems","authors":"Haoran Zhu, J. Mao, Jianjie Li","doi":"10.1109/IEEE-IWS.2013.6616701","DOIUrl":"https://doi.org/10.1109/IEEE-IWS.2013.6616701","url":null,"abstract":"In this paper, a novel power plane of electromagnetic bandgap (EBG) structure for wideband mitigation of simultaneous switching noise (SSN) in mixed signal systems is proposed. Complementary split ring resonator (CSRR) with inherent filtering characteristic is utilized for constituting EBG unit cells. From the simulated and measured results of the proposed EBG structure, a wideband suppression of SSN ranges from 0.56 GHz to 5.88 GHz is achieved with a high mitigation level of -40 dB. Furthermore, the influence of the proposed power plane of EBG structure on the signal integrity (SI) is investigated in the time and frequency domains, respectively. The results show that the SI performance can be improved significantly by using differential pairs for the signals.","PeriodicalId":344851,"journal":{"name":"2013 IEEE International Wireless Symposium (IWS)","volume":"113 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":"114501608","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}
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