Pub Date : 2013-12-01DOI: 10.1109/IMWS-BIO.2013.6756216
B. Luo, L. Ong, M. Karim
A 94GHz passive millimeter wave (PMMW) imaging system is designed, prototyped and tested for target detection in haze and fog. To compact the system size and increase the scan area and speed, continue azimuth with step elevation (θ-φ) scanning is used here. Center frequency of the detected signal is 94GHz and the bandwidth is +/-2GHz. To increase the sensitivity and eliminate noise, an instrumentation amplifier and an active low pass filter with 10Hz cutoff bandwidth are adopted in this system. Test conducted in a sheath room shows that this system is suitable for detecting target in thick smoke.
{"title":"Development of a 94GHz passive millimeter wave imaging system for target detection in haze and smoke","authors":"B. Luo, L. Ong, M. Karim","doi":"10.1109/IMWS-BIO.2013.6756216","DOIUrl":"https://doi.org/10.1109/IMWS-BIO.2013.6756216","url":null,"abstract":"A 94GHz passive millimeter wave (PMMW) imaging system is designed, prototyped and tested for target detection in haze and fog. To compact the system size and increase the scan area and speed, continue azimuth with step elevation (θ-φ) scanning is used here. Center frequency of the detected signal is 94GHz and the bandwidth is +/-2GHz. To increase the sensitivity and eliminate noise, an instrumentation amplifier and an active low pass filter with 10Hz cutoff bandwidth are adopted in this system. Test conducted in a sheath room shows that this system is suitable for detecting target in thick smoke.","PeriodicalId":6321,"journal":{"name":"2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO)","volume":"33 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87977312","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 : 2013-12-01DOI: 10.1109/IMWS-BIO.2013.6756236
Nicole Todtenberg, Jorg Klatt, Sebastian-Tim Schmitz-Hertzberg, Felix Jorde, K. Schmalz
A biochemical sensor capsule for the remote monitoring of an algae culture cultivated in a photobioreactor is presented. In this context a concept of data acquisition and transmission is developed. The data transmission from inside the bioreactor to a receiver outside was analyzed. Hereby recorded packet error rate converged to 30 %.
{"title":"Wireless sensor capsule for bioreactors","authors":"Nicole Todtenberg, Jorg Klatt, Sebastian-Tim Schmitz-Hertzberg, Felix Jorde, K. Schmalz","doi":"10.1109/IMWS-BIO.2013.6756236","DOIUrl":"https://doi.org/10.1109/IMWS-BIO.2013.6756236","url":null,"abstract":"A biochemical sensor capsule for the remote monitoring of an algae culture cultivated in a photobioreactor is presented. In this context a concept of data acquisition and transmission is developed. The data transmission from inside the bioreactor to a receiver outside was analyzed. Hereby recorded packet error rate converged to 30 %.","PeriodicalId":6321,"journal":{"name":"2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO)","volume":"25 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89117037","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 : 2013-12-01DOI: 10.1109/IMWS-BIO.2013.6756157
F.-l. Wong, M. Raja, M. Je
This paper presents a 8-bit RFDAC for quadrature transmitter by 130nm CMOS process, targeted for medical body area network application as per recently released IEEE 802.15.6 standard. Circuit architecture and design considerations are briefly introduced. To achieve output power range over 20dB, gain control by two voltage biases is adopted. Compared with the gain control by single voltage bias, this control method offers wider output power range and better power efficiency.
{"title":"RFDAC for medical body area network applications","authors":"F.-l. Wong, M. Raja, M. Je","doi":"10.1109/IMWS-BIO.2013.6756157","DOIUrl":"https://doi.org/10.1109/IMWS-BIO.2013.6756157","url":null,"abstract":"This paper presents a 8-bit RFDAC for quadrature transmitter by 130nm CMOS process, targeted for medical body area network application as per recently released IEEE 802.15.6 standard. Circuit architecture and design considerations are briefly introduced. To achieve output power range over 20dB, gain control by two voltage biases is adopted. Compared with the gain control by single voltage bias, this control method offers wider output power range and better power efficiency.","PeriodicalId":6321,"journal":{"name":"2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO)","volume":"5 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84753279","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 : 2013-12-01DOI: 10.1109/IMWS-BIO.2013.6756233
M. Li, Di-Xiang Yin, Long Wang, J. L. Li
In this paper, a circular conformal radiation system is considered for the quadrant breast cancer therapy. A toroidal conformal antenna is proposed for nipple area breast cancer therapy. The specific absorption rate (SAR) values in the breast model are analyzed based on simulated results using finite element method (FEM) in HFSS software. Different sizes of toroidal antennas are assumed in simulations to find the best focusing effects in the tumor region. By comparing various simulation results, it is concluded that focusing effects in tumor region vary with sizes of antennas. At the same time, a preliminary biomedical system is proposed for adaptive therapy of breast cancer tumors with arbitrary positions. The high treatment efficiency is achieved by varying feeding signal phases on the two antenna patches for different beam scanning.
{"title":"Microwave near-field effects and characterizations for noninvasive breast cancer treatment","authors":"M. Li, Di-Xiang Yin, Long Wang, J. L. Li","doi":"10.1109/IMWS-BIO.2013.6756233","DOIUrl":"https://doi.org/10.1109/IMWS-BIO.2013.6756233","url":null,"abstract":"In this paper, a circular conformal radiation system is considered for the quadrant breast cancer therapy. A toroidal conformal antenna is proposed for nipple area breast cancer therapy. The specific absorption rate (SAR) values in the breast model are analyzed based on simulated results using finite element method (FEM) in HFSS software. Different sizes of toroidal antennas are assumed in simulations to find the best focusing effects in the tumor region. By comparing various simulation results, it is concluded that focusing effects in tumor region vary with sizes of antennas. At the same time, a preliminary biomedical system is proposed for adaptive therapy of breast cancer tumors with arbitrary positions. The high treatment efficiency is achieved by varying feeding signal phases on the two antenna patches for different beam scanning.","PeriodicalId":6321,"journal":{"name":"2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO)","volume":"16 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82756829","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 : 2013-12-01DOI: 10.1109/IMWS-BIO.2013.6756187
C. J. Leo, M. Raja, J. Minkyu
A compact high PSR Low Drop-Out (LDO) voltage regulator providing a peak load-current (IL) of 100μA is realized in 0.13μm CMOS 1P6M process. Ultra low-power operation is achieved for the power block by realizing a nano-power bandgap reference circuit whose total power consumption including LDO is only just 95nW for 1.2Vsupply. The resistor-less reference circuit with no external capacitor for LDO stability results in a very compact design occupying just 0.033 mm2. The proposed post-layout reference and LDO block consumes only 38nA and 41nA respectively, regulating output at 0.9V with a 1.2V supply.
{"title":"An ultra low-power capacitor-less LDO with high PSR","authors":"C. J. Leo, M. Raja, J. Minkyu","doi":"10.1109/IMWS-BIO.2013.6756187","DOIUrl":"https://doi.org/10.1109/IMWS-BIO.2013.6756187","url":null,"abstract":"A compact high PSR Low Drop-Out (LDO) voltage regulator providing a peak load-current (IL) of 100μA is realized in 0.13μm CMOS 1P6M process. Ultra low-power operation is achieved for the power block by realizing a nano-power bandgap reference circuit whose total power consumption including LDO is only just 95nW for 1.2Vsupply. The resistor-less reference circuit with no external capacitor for LDO stability results in a very compact design occupying just 0.033 mm2. The proposed post-layout reference and LDO block consumes only 38nA and 41nA respectively, regulating output at 0.9V with a 1.2V supply.","PeriodicalId":6321,"journal":{"name":"2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO)","volume":"5 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75118015","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 : 2013-12-01DOI: 10.1109/IMWS-BIO.2013.6756199
N. Watanabe, Tomonori Nakamura, Mami Nozawa, Masaki Ishida, H. Shimasaki, Y. Kado
We developed a near-field coupling communication (NFCC) technology that uses the surface of the human body as a data transmission path in the MHz band. It is important to assess the loss of signal propagation on the human body to design a “touch and connect” form of stable NFCC links. We measured the signal propagation characteristics on a phantom equivalent to the human body with an electrically isolated probe. In addition, we evaluated the signal loss characteristics with a high frequency structure simulator. As a result, we found dependencies of signal loss on distance in both the experiments and the simulations.
{"title":"Propagation characteristics of MHz-band RF signals for intra-body communication","authors":"N. Watanabe, Tomonori Nakamura, Mami Nozawa, Masaki Ishida, H. Shimasaki, Y. Kado","doi":"10.1109/IMWS-BIO.2013.6756199","DOIUrl":"https://doi.org/10.1109/IMWS-BIO.2013.6756199","url":null,"abstract":"We developed a near-field coupling communication (NFCC) technology that uses the surface of the human body as a data transmission path in the MHz band. It is important to assess the loss of signal propagation on the human body to design a “touch and connect” form of stable NFCC links. We measured the signal propagation characteristics on a phantom equivalent to the human body with an electrically isolated probe. In addition, we evaluated the signal loss characteristics with a high frequency structure simulator. As a result, we found dependencies of signal loss on distance in both the experiments and the simulations.","PeriodicalId":6321,"journal":{"name":"2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO)","volume":"10 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81982425","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 : 2013-12-01DOI: 10.1109/IMWS-BIO.2013.6756220
Zhaobi Wang, Dongmei Dan, S. Xiao, M. Tang
A wide bandwidth, broad beam-width microstrip antenna element is reported for active phased array application. The antenna element offers a return loss better than -10dB over a bandwidth of 24.82% in Ku-band with beam-widths of 134° in H-plane and 126° in E-plane, respectively. The antenna is capable of realizing two orthogonal linear polarizations and a circular polarization respectively when different feeding approaches are utilized. Moreover, the wide-angle scanning characteristic of the 8×8 array composed of proposed element is evaluated. Besides, the microstrip steerable antenna array can be easily embedded into wearable medical or commercial devices.
{"title":"A broad beam-width microstrip cross antenna design for wide scan angle phased array","authors":"Zhaobi Wang, Dongmei Dan, S. Xiao, M. Tang","doi":"10.1109/IMWS-BIO.2013.6756220","DOIUrl":"https://doi.org/10.1109/IMWS-BIO.2013.6756220","url":null,"abstract":"A wide bandwidth, broad beam-width microstrip antenna element is reported for active phased array application. The antenna element offers a return loss better than -10dB over a bandwidth of 24.82% in Ku-band with beam-widths of 134° in H-plane and 126° in E-plane, respectively. The antenna is capable of realizing two orthogonal linear polarizations and a circular polarization respectively when different feeding approaches are utilized. Moreover, the wide-angle scanning characteristic of the 8×8 array composed of proposed element is evaluated. Besides, the microstrip steerable antenna array can be easily embedded into wearable medical or commercial devices.","PeriodicalId":6321,"journal":{"name":"2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO)","volume":"37 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81449418","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 : 2013-12-01DOI: 10.1109/IMWS-BIO.2013.6756245
J. Sakai, Linsheng Wu, Hucheng Sun, Yong-xin Guo
Intrabody communication (IBC) is a promising technology that enables the improvement of digital healthcare devices. IBC uses the human body as a transmission media, and the accurate transmission model is important for the design of transceivers. In the measurements of transmission characteristics, baluns have been widely used to separate the grounds of transmitter and receiver. In this work, we analyze the balun's effect on the measured results of capacitive IBC channel. Baluns and balun boards used in our measurements have the parasitic common-mode capacitances, ranging from 1.1 to 32 pF, which affects the measured transmission level of the IBC channel, leading to a significant difference of about 40 dB.
{"title":"Balun's effect on the measurement of transmission characteristics for intrabody communication channel","authors":"J. Sakai, Linsheng Wu, Hucheng Sun, Yong-xin Guo","doi":"10.1109/IMWS-BIO.2013.6756245","DOIUrl":"https://doi.org/10.1109/IMWS-BIO.2013.6756245","url":null,"abstract":"Intrabody communication (IBC) is a promising technology that enables the improvement of digital healthcare devices. IBC uses the human body as a transmission media, and the accurate transmission model is important for the design of transceivers. In the measurements of transmission characteristics, baluns have been widely used to separate the grounds of transmitter and receiver. In this work, we analyze the balun's effect on the measured results of capacitive IBC channel. Baluns and balun boards used in our measurements have the parasitic common-mode capacitances, ranging from 1.1 to 32 pF, which affects the measured transmission level of the IBC channel, leading to a significant difference of about 40 dB.","PeriodicalId":6321,"journal":{"name":"2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO)","volume":"14 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81940985","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 : 2013-12-01DOI: 10.1109/IMWS-BIO.2013.6756169
Lei Zhao, Dong-fang Liu, Geng Chen, Qin Ye
Specific absorption rate (SAR) is employed here to study the relationship between the radiation of a mobile handset and the human eye models. In the paper, the SAR in two human eye models, whose dielectric values are increased from the original by ±10% and ±20% are studied using the finite-difference time-domain method. A dipole antenna is used as an exposure source at 1800MHz. Through the simulation, the averaged values of SAR per 1g tissue and point SAR at frequency 1800MHz are obtained. The simulation results show that the variation of maximum averaged 1g SAR values is less than 12% when the dielectric properties change up to 20% at the operationfrequency of 1800 MHz. The variation of point SAR values is almost 30% when the dielectric properties change up to 20% at the operationfrequency of 1800 MHz.
{"title":"Effects of dielectric values of human eye models on specific absorption rate following rf exposure","authors":"Lei Zhao, Dong-fang Liu, Geng Chen, Qin Ye","doi":"10.1109/IMWS-BIO.2013.6756169","DOIUrl":"https://doi.org/10.1109/IMWS-BIO.2013.6756169","url":null,"abstract":"Specific absorption rate (SAR) is employed here to study the relationship between the radiation of a mobile handset and the human eye models. In the paper, the SAR in two human eye models, whose dielectric values are increased from the original by ±10% and ±20% are studied using the finite-difference time-domain method. A dipole antenna is used as an exposure source at 1800MHz. Through the simulation, the averaged values of SAR per 1g tissue and point SAR at frequency 1800MHz are obtained. The simulation results show that the variation of maximum averaged 1g SAR values is less than 12% when the dielectric properties change up to 20% at the operationfrequency of 1800 MHz. The variation of point SAR values is almost 30% when the dielectric properties change up to 20% at the operationfrequency of 1800 MHz.","PeriodicalId":6321,"journal":{"name":"2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO)","volume":"115 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80820745","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 : 2013-12-01DOI: 10.1109/IMWS-BIO.2013.6756239
J. Chang, Genevieve Tong, Lin Tong
Printed electronics, particularly that printed on a flexible substrate such as a plastic film, is an emerging technology that would likely complement conventional silicon-based electronics in numerous applications. The Organic Electronic Association (OE-A) projects that printed electronics RFID smart labels will be ubiquitous only in medium term (2017-2020). In this paper, we present the highly formidable challenges of state-of-the-art printed electronics towards the realization of electronics, and wireless circuits/systems such as an RFID. We also present some of our efforts towards the realization of an RFID and the challenges thereto, particularly realization thereof based on our low-cost green fully-Additive printing process vis-à-vis conventional high-cost un-green Subtractive processes.
{"title":"Fully-additive printed RFID on a plastic film","authors":"J. Chang, Genevieve Tong, Lin Tong","doi":"10.1109/IMWS-BIO.2013.6756239","DOIUrl":"https://doi.org/10.1109/IMWS-BIO.2013.6756239","url":null,"abstract":"Printed electronics, particularly that printed on a flexible substrate such as a plastic film, is an emerging technology that would likely complement conventional silicon-based electronics in numerous applications. The Organic Electronic Association (OE-A) projects that printed electronics RFID smart labels will be ubiquitous only in medium term (2017-2020). In this paper, we present the highly formidable challenges of state-of-the-art printed electronics towards the realization of electronics, and wireless circuits/systems such as an RFID. We also present some of our efforts towards the realization of an RFID and the challenges thereto, particularly realization thereof based on our low-cost green fully-Additive printing process vis-à-vis conventional high-cost un-green Subtractive processes.","PeriodicalId":6321,"journal":{"name":"2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO)","volume":"30 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90244439","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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