Pub Date : 2015-12-28DOI: 10.1109/IWAT.2015.7365328
J. Ahn, J. Jeong, H. Hong, Y. Yoon
This paper suggests a very simple method to miniaturize self-complementary Archimedean spiral antenna (SCASA). Just extending the ends of spiral arms within the outer radius of conventional spiral antenna can bring the lowest operating frequency down about 9%. Compared with the conventional design method, the proposed method leads to size reduction more than 17% despite the same operating frequency range.
{"title":"A simple method for miniaturization of self-complementary Archimedean spiral antenna","authors":"J. Ahn, J. Jeong, H. Hong, Y. Yoon","doi":"10.1109/IWAT.2015.7365328","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365328","url":null,"abstract":"This paper suggests a very simple method to miniaturize self-complementary Archimedean spiral antenna (SCASA). Just extending the ends of spiral arms within the outer radius of conventional spiral antenna can bring the lowest operating frequency down about 9%. Compared with the conventional design method, the proposed method leads to size reduction more than 17% despite the same operating frequency range.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122270626","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365281
Imran Gani, H. Yoo
In this study, we present a scalp implantable miniaturized biocompatible antenna at the medical implant communication service (MICS) band (402-405 MHz). The antenna dimension is only 26.4 mm3 (11 mm × 8 mm × 0.3 mm) which is an electrically small antenna. It provides a monopole like radiation pattern with radiation efficiency of 1.9%, -10dB impedance band-width of 42MHz and gain of -42.21 dB. These results are achieved when it is implanted in skin tissue of a human head model at 5mm depth. To reduce simulation time, initially the antenna was placed in a skin tissue simulating box of 5mm implant depth. For simulation in skin tissue box, Ansoft's EM simulator HFSS and for human head implantation, SEMCAD X FDTD software was used.
在这项研究中，我们提出了一种医疗植入通信服务(MICS)频段(402-405 MHz)的头皮植入式微型生物相容性天线。天线尺寸仅为26.4 mm3 (11 mm × 8 mm × 0.3 mm)，是一个电小型天线。它提供了一个类似单极子的辐射方向图，辐射效率为1.9%，阻抗带宽为42MHz，增益为-42.21 dB。这些结果是当它被植入人体头部模型的皮肤组织5mm深度时实现的。为了减少模拟时间，最初将天线放置在植入深度为5mm的皮肤组织模拟盒中。皮肤组织盒内仿真采用安软公司的电磁仿真器HFSS，头部植入采用SEMCAD X FDTD软件。
{"title":"Miniaturized scalp-implantable antenna for wireless biotelemetry","authors":"Imran Gani, H. Yoo","doi":"10.1109/IWAT.2015.7365281","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365281","url":null,"abstract":"In this study, we present a scalp implantable miniaturized biocompatible antenna at the medical implant communication service (MICS) band (402-405 MHz). The antenna dimension is only 26.4 mm3 (11 mm × 8 mm × 0.3 mm) which is an electrically small antenna. It provides a monopole like radiation pattern with radiation efficiency of 1.9%, -10dB impedance band-width of 42MHz and gain of -42.21 dB. These results are achieved when it is implanted in skin tissue of a human head model at 5mm depth. To reduce simulation time, initially the antenna was placed in a skin tissue simulating box of 5mm implant depth. For simulation in skin tissue box, Ansoft's EM simulator HFSS and for human head implantation, SEMCAD X FDTD software was used.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115989142","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365363
N. P. B. Kammersgaard, S. Kvist, J. Thaysen, K. Jakobsen
A novel body-worn spiral monopole antenna is presented. The antenna consists of a ground plane and a spiral monopole. The antenna is designed for Ear-to-Ear (E2E) communication between In-the-Ear (ITE) Hearing Instruments (HIs) at 2.45 GHz and has been simulated, prototyped and measured. The antenna yields a measured and simulated Ear-to-Ear path gain at 2.45 GHz of -82.1 dB and -85.9 dB, respectively. The radiation pattern of the antenna when mounted in the ear is presented and discussed.
{"title":"Body-worn spiral monopole antenna for body-centric communications","authors":"N. P. B. Kammersgaard, S. Kvist, J. Thaysen, K. Jakobsen","doi":"10.1109/IWAT.2015.7365363","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365363","url":null,"abstract":"A novel body-worn spiral monopole antenna is presented. The antenna consists of a ground plane and a spiral monopole. The antenna is designed for Ear-to-Ear (E2E) communication between In-the-Ear (ITE) Hearing Instruments (HIs) at 2.45 GHz and has been simulated, prototyped and measured. The antenna yields a measured and simulated Ear-to-Ear path gain at 2.45 GHz of -82.1 dB and -85.9 dB, respectively. The radiation pattern of the antenna when mounted in the ear is presented and discussed.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122963573","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365299
Y. Wahyu, F. Oktafiani, A. Lestari
GPR (ground penetrating radar) survey to locate objects of unknown depth requires more than one type of pulse duration means using a number of antenna with different length. GPR antenna prototypes for two of the most optimum pulse is proposed dipole antenna consists of two pairs of antennas, each of the main antenna (short-length) of the feed point to bending (discontinuity) is equal to 3 cm and 6.5 cm for the main antenna (long-length). Model analysis for the coupling between the arms of the antenna mutual impedance analysis using two dipole orientation angle. Flare angle of 70 degree angles show mutual impedance lowest. This is consistent with FDTD (finite difference time domain) simulation results that the lowest coupling occurs at a flare angle of 70 degree.
{"title":"Analysis of coupling between antenna elements for flare angle determination in dual pulses GPR antenna","authors":"Y. Wahyu, F. Oktafiani, A. Lestari","doi":"10.1109/IWAT.2015.7365299","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365299","url":null,"abstract":"GPR (ground penetrating radar) survey to locate objects of unknown depth requires more than one type of pulse duration means using a number of antenna with different length. GPR antenna prototypes for two of the most optimum pulse is proposed dipole antenna consists of two pairs of antennas, each of the main antenna (short-length) of the feed point to bending (discontinuity) is equal to 3 cm and 6.5 cm for the main antenna (long-length). Model analysis for the coupling between the arms of the antenna mutual impedance analysis using two dipole orientation angle. Flare angle of 70 degree angles show mutual impedance lowest. This is consistent with FDTD (finite difference time domain) simulation results that the lowest coupling occurs at a flare angle of 70 degree.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116873768","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365362
Seonho Lim, W. Choi, Y. Yoon, K. S. Ryu
The isolation technique using the λ /4 Stub RF Choke is proposed in this paper. The isolation technique between two antenna elements is important in order to prevent the edge current cause degradation of the antenna performances. The Radio Frequency choke (RFC) is placed in the middle of two conventional inverted-F antenna elements to improve the isolation between the two antennas. The shape of λ /4 Stub which is connected with the top of the ground plane is changed to reduce its physical size by bending and being burrowed into the ground plane. The MIMO antenna elements are well matched in the range of LTE 2300 (2300 ~ 2400 MHz) band and have a return loss under -6 dB (VSWR <; 3) also, the isolation is lower than -20 dB at the center frequency. The Envelope Correlation Coefficient (ECC) value is under 0.2 which shows that good isolation is achieved.
{"title":"Isolation technique using the A/4 Stub RF Choke for the mobile MIMO system","authors":"Seonho Lim, W. Choi, Y. Yoon, K. S. Ryu","doi":"10.1109/IWAT.2015.7365362","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365362","url":null,"abstract":"The isolation technique using the λ /4 Stub RF Choke is proposed in this paper. The isolation technique between two antenna elements is important in order to prevent the edge current cause degradation of the antenna performances. The Radio Frequency choke (RFC) is placed in the middle of two conventional inverted-F antenna elements to improve the isolation between the two antennas. The shape of λ /4 Stub which is connected with the top of the ground plane is changed to reduce its physical size by bending and being burrowed into the ground plane. The MIMO antenna elements are well matched in the range of LTE 2300 (2300 ~ 2400 MHz) band and have a return loss under -6 dB (VSWR <; 3) also, the isolation is lower than -20 dB at the center frequency. The Envelope Correlation Coefficient (ECC) value is under 0.2 which shows that good isolation is achieved.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128681933","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365371
R. Kuse, T. Hori, M. Fujimoto
This paper focuses on an AMC (Artificial Magnetic Conductor) composed of a FSS (Frequency Selective Surface) and the ground plane, and describes the ideal filtering characteristics for realizing PMC (Perfect Magnetic Conductor) which is independent of frequency. The ideal filtering characteristics is derived from the condition for realizing the PMC in all the frequency using the relational expression between the filtering characteristics of a FSS and the PMC characteristics of the AMC. As the result, it is clarified that the ideal filter is a band pass filter. It is also shown that the optimum distance h between a FSS and the ground plane is a quarter wavelengths at the band pass frequency. On the other hand, it is found that the phase rotation direction is opposite compared with the conventional band pass frequency. It is found that the ideal filtering characteristics can be realized by using negative index material.
{"title":"Filtering characteristics of FSS for realizing perfect magnetic conductor without frequency dependence","authors":"R. Kuse, T. Hori, M. Fujimoto","doi":"10.1109/IWAT.2015.7365371","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365371","url":null,"abstract":"This paper focuses on an AMC (Artificial Magnetic Conductor) composed of a FSS (Frequency Selective Surface) and the ground plane, and describes the ideal filtering characteristics for realizing PMC (Perfect Magnetic Conductor) which is independent of frequency. The ideal filtering characteristics is derived from the condition for realizing the PMC in all the frequency using the relational expression between the filtering characteristics of a FSS and the PMC characteristics of the AMC. As the result, it is clarified that the ideal filter is a band pass filter. It is also shown that the optimum distance h between a FSS and the ground plane is a quarter wavelengths at the band pass frequency. On the other hand, it is found that the phase rotation direction is opposite compared with the conventional band pass frequency. It is found that the ideal filtering characteristics can be realized by using negative index material.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129064905","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365350
S. M. Abbas, Y. Ranga, K. Esselle
This paper presents a switchable printed antenna with a full ground plane for wireless body area network devices operating in the industrial, scientific, and medical (ISM) band at 2.45 GHz and 5 GHz IEEE 802.11 Wireless Local Area Networks (WLAN) (5.15-5.35 GHz, 5.25-5.35 GHz). The operating bands can be switched between 2.45 GHz and 5 GHz by turning the switches ON/OFF. Investigations have been carried out in near body scenario to assess its performance for body centric wireless communication. The proposed antenna exhibits a wide radiation pattern along the body surface to provide wide coverage and its narrow width (14mm) makes it suitable for on-body applications.
{"title":"A switchable printed antenna with a ground plane for 2.45/5 GHz wireless body area networks","authors":"S. M. Abbas, Y. Ranga, K. Esselle","doi":"10.1109/IWAT.2015.7365350","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365350","url":null,"abstract":"This paper presents a switchable printed antenna with a full ground plane for wireless body area network devices operating in the industrial, scientific, and medical (ISM) band at 2.45 GHz and 5 GHz IEEE 802.11 Wireless Local Area Networks (WLAN) (5.15-5.35 GHz, 5.25-5.35 GHz). The operating bands can be switched between 2.45 GHz and 5 GHz by turning the switches ON/OFF. Investigations have been carried out in near body scenario to assess its performance for body centric wireless communication. The proposed antenna exhibits a wide radiation pattern along the body surface to provide wide coverage and its narrow width (14mm) makes it suitable for on-body applications.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121412723","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365274
Han-Joong Kim, Sujin Kim, S. Yoo, H. Choo
This paper proposed the test setup for performance evaluation of an FMCW radar. The test setup includes multiple targets with different velocities, which represents the boundary of a certain detection region. The surrounding environments, such as the position and direction of the antenna arrays and ground conditions are also included in the test setup. The metric for evaluation of the detection performance is then defined as a cost function that utilizes the amplitude of each boundary target on a range-Doppler image. Using the proposed test setup and the cost function, the antenna HPBW is optimized and the results demonstrate the method is suitable for performance evaluation of the FMCW radar.
{"title":"Study on evaluation method for FMCW radar using EM simulation","authors":"Han-Joong Kim, Sujin Kim, S. Yoo, H. Choo","doi":"10.1109/IWAT.2015.7365274","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365274","url":null,"abstract":"This paper proposed the test setup for performance evaluation of an FMCW radar. The test setup includes multiple targets with different velocities, which represents the boundary of a certain detection region. The surrounding environments, such as the position and direction of the antenna arrays and ground conditions are also included in the test setup. The metric for evaluation of the detection performance is then defined as a cost function that utilizes the amplitude of each boundary target on a range-Doppler image. Using the proposed test setup and the cost function, the antenna HPBW is optimized and the results demonstrate the method is suitable for performance evaluation of the FMCW radar.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126286332","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365311
W. Hong, S. Ko, Youngju Lee, K. Baek
Novel antenna design technologies are devised at 28 GHz to realize vertical and horizontal polarizations and its combined radiation characteristics using ultra-thin printed circuit board (PCB) substrates. Details of the design methodologies, simulation and measurement results are presented and discussed in relation to the targeted mmWave 5G mobile application.
{"title":"Multi-polarized antenna array configuration for mmWave 5G mobile terminals","authors":"W. Hong, S. Ko, Youngju Lee, K. Baek","doi":"10.1109/IWAT.2015.7365311","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365311","url":null,"abstract":"Novel antenna design technologies are devised at 28 GHz to realize vertical and horizontal polarizations and its combined radiation characteristics using ultra-thin printed circuit board (PCB) substrates. Details of the design methodologies, simulation and measurement results are presented and discussed in relation to the targeted mmWave 5G mobile application.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115869379","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 : 2015-03-04DOI: 10.1109/IWAT.2015.7365337
H. Dinis, M. Zamith, J. Fernandes, J. Magalhaes, P. Mendes
The high path losses experienced by wireless applications at millimeter wavelengths may be mitigated using high gain antennas. The intrinsic small wavelengths makes very attractive to develop solutions with on-chip integrated antennas. However, due to silicon high losses, on-chip antenna elements on RFCMOS technology have reduced efficiency. This paper proposes a solution to obtain an on-chip integrated antenna array based on 3D efficient antenna elements. A 4 element antenna was designed to operate at 57.5 GHz central frequency, with maximum gain of 5.8 dB, and maximum expected efficiency of 45%.
{"title":"On-chip, efficient and small antenna array for millimeter-wave applications","authors":"H. Dinis, M. Zamith, J. Fernandes, J. Magalhaes, P. Mendes","doi":"10.1109/IWAT.2015.7365337","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365337","url":null,"abstract":"The high path losses experienced by wireless applications at millimeter wavelengths may be mitigated using high gain antennas. The intrinsic small wavelengths makes very attractive to develop solutions with on-chip integrated antennas. However, due to silicon high losses, on-chip antenna elements on RFCMOS technology have reduced efficiency. This paper proposes a solution to obtain an on-chip integrated antenna array based on 3D efficient antenna elements. A 4 element antenna was designed to operate at 57.5 GHz central frequency, with maximum gain of 5.8 dB, and maximum expected efficiency of 45%.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130184196","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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