Pub Date : 2015-03-04DOI: 10.1109/IWAT.2015.7365338
Minwoo Yi, Yongjun Hong, Woosang Lee, J. So
Digitized beam-forming metal reflectarray antennas are designed for millimeter-wave region. The phase control of antennas has been implemented by the reconfiguration of rectangular grooves on a metal plate. The antenna has 1,147 elements arranged in an aluminum metal plate. All depths of metal grooves are elaborately manipulated and digitized for designed phase control of high-gain beam-aimed reflectors. We have demonstrated digitized reconfigurable metal reflectarray to steer re-radiated millimeter-wave field from the reflector in a two dimensional plane. The proposed antennas can be a helpful choice for millimeter-wave applications requiring high-gain beam-forming antennas.
{"title":"Digitized millimeter-wave beam-forming metal reflectarray antenna","authors":"Minwoo Yi, Yongjun Hong, Woosang Lee, J. So","doi":"10.1109/IWAT.2015.7365338","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365338","url":null,"abstract":"Digitized beam-forming metal reflectarray antennas are designed for millimeter-wave region. The phase control of antennas has been implemented by the reconfiguration of rectangular grooves on a metal plate. The antenna has 1,147 elements arranged in an aluminum metal plate. All depths of metal grooves are elaborately manipulated and digitized for designed phase control of high-gain beam-aimed reflectors. We have demonstrated digitized reconfigurable metal reflectarray to steer re-radiated millimeter-wave field from the reflector in a two dimensional plane. The proposed antennas can be a helpful choice for millimeter-wave applications requiring high-gain beam-forming antennas.","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":"129849325","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.2015.7365359
S. Yoon, Jae W. Lee, Junyong Han
This paper describes SIW(Substrate Integrated Waveguide)-based feeding antenna for the application of SDR(Software Defined Radar). It is usually well-known that SIWs are good for easy integration, low-loss and electromagnetically immunized characteristics. In particular, it is shown that the size of the antenna is reduced significantly (37.2%) due to the application of meander line structure. The antenna design and verification are performed through commercially available full-EM software.
{"title":"SIW-based linearly polarized S-band antenna for software defined radar","authors":"S. Yoon, Jae W. Lee, Junyong Han","doi":"10.1109/IWAT.2015.7365359","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365359","url":null,"abstract":"This paper describes SIW(Substrate Integrated Waveguide)-based feeding antenna for the application of SDR(Software Defined Radar). It is usually well-known that SIWs are good for easy integration, low-loss and electromagnetically immunized characteristics. In particular, it is shown that the size of the antenna is reduced significantly (37.2%) due to the application of meander line structure. The antenna design and verification are performed through commercially available full-EM software.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"6 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":"133741239","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.2015.7365349
S. Lemey, H. Rogier
Textile multi-antenna systems are key components of smart fabric and interactive textile (SFIT) systems, as they establish reliable and energy-efficient wireless body-centric communication links. In this work, we investigate how their functionality can further be extended by exploiting their surface as an energy harvesting and power management platform. We provide guidelines for selecting an appropriate antenna topology and describe a suitable integration procedure. We demonstrate this approach by integrating two flexible solar cells, a micro-energy cell and a flexible power management system onto a well-chosen wearable substrate integrated waveguide cavity-backed textile slot antenna, without affecting its performance, to enable energy harvesting from solar and artificial light. In addition, the compact and highly-integrated harvesting module provides a terminal for connecting a thermoelectric generator, enabling thermal body energy harvesting. Measurements in a realistic indoor environment have demonstrated that this hybrid energy harvesting approach leverages a more continuous flow of scavenged energy, enabling energy scavenging in most of the indoor and outdoor scenarios.
{"title":"Substrate integrated waveguide textile antennas as energy harvesting platforms","authors":"S. Lemey, H. Rogier","doi":"10.1109/IWAT.2015.7365349","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365349","url":null,"abstract":"Textile multi-antenna systems are key components of smart fabric and interactive textile (SFIT) systems, as they establish reliable and energy-efficient wireless body-centric communication links. In this work, we investigate how their functionality can further be extended by exploiting their surface as an energy harvesting and power management platform. We provide guidelines for selecting an appropriate antenna topology and describe a suitable integration procedure. We demonstrate this approach by integrating two flexible solar cells, a micro-energy cell and a flexible power management system onto a well-chosen wearable substrate integrated waveguide cavity-backed textile slot antenna, without affecting its performance, to enable energy harvesting from solar and artificial light. In addition, the compact and highly-integrated harvesting module provides a terminal for connecting a thermoelectric generator, enabling thermal body energy harvesting. Measurements in a realistic indoor environment have demonstrated that this hybrid energy harvesting approach leverages a more continuous flow of scavenged energy, enabling energy scavenging in most of the indoor and outdoor scenarios.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"35 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":"114116456","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.2015.7365276
T. Nguyen, I. Park
We designed a single-feed microstrip antenna in a Fabry-Perot resonator cavity used for Ku-band (12-18 GHz) applications. A cavity was formed by a ground plane and a frequency selective surface made of a circular hole array and was excited by a single-feed microstrip patch located inside the cavity. The antenna with low-profile and reduced thickness produced a high gain (~19 dBi) and a broad bandwidth (~7%). The optimized antenna was fabricated, and the measured results were close to the simulated ones.
{"title":"Broadband single-feed microstrip antenna in a fabry-perot resonator","authors":"T. Nguyen, I. Park","doi":"10.1109/IWAT.2015.7365276","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365276","url":null,"abstract":"We designed a single-feed microstrip antenna in a Fabry-Perot resonator cavity used for Ku-band (12-18 GHz) applications. A cavity was formed by a ground plane and a frequency selective surface made of a circular hole array and was excited by a single-feed microstrip patch located inside the cavity. The antenna with low-profile and reduced thickness produced a high gain (~19 dBi) and a broad bandwidth (~7%). The optimized antenna was fabricated, and the measured results were close to the simulated ones.","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":"116303093","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.2015.7365356
Minkil Park, Du-Yeon Lee, Taeho Son
In this paper, a GPS (Global Positioning System) patch antenna using 90 degree phase shifter for RHCP and broadband AR(Axial Ratio) bandwidth was designed and implemented. We provided two patches as a FR-4 patch and a 1.5mm thickness thin ceramic patch with 90 degree phase shifter. 90 degree phase shifter is fed to each patches to achieve CP (Circularly Polarization) radiation. SMD by chip elements was applied to 90 degree phase shifter. VSWR measurement showed within 2 : 1 over the whole design band, and 3dB AR bandwidth was 205MHz. Antenna gain and efficiencies were measured as 1.36-2.75dBi and 15.11-25.3%, respectively.
{"title":"Thin ceramic GPS antenna","authors":"Minkil Park, Du-Yeon Lee, Taeho Son","doi":"10.1109/IWAT.2015.7365356","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365356","url":null,"abstract":"In this paper, a GPS (Global Positioning System) patch antenna using 90 degree phase shifter for RHCP and broadband AR(Axial Ratio) bandwidth was designed and implemented. We provided two patches as a FR-4 patch and a 1.5mm thickness thin ceramic patch with 90 degree phase shifter. 90 degree phase shifter is fed to each patches to achieve CP (Circularly Polarization) radiation. SMD by chip elements was applied to 90 degree phase shifter. VSWR measurement showed within 2 : 1 over the whole design band, and 3dB AR bandwidth was 205MHz. Antenna gain and efficiencies were measured as 1.36-2.75dBi and 15.11-25.3%, respectively.","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":"128568242","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.2015.7365343
S. Hrabar
A beam-squint-free leaky-wave antenna is one of potentially important applications of non-Foster metamaterials. However, several recent studies pointed out inherent stability problem of non-Foster elements, indicating that practical realization of leaky-wave antenna may be very challenging, if not entirely impossible. Here, we analyze the origin of stability issue and propose the design methodology that assures stable operation.
{"title":"Leaky-wave antenna based on non-foster metamaterial - Is stable operation feasible?","authors":"S. Hrabar","doi":"10.1109/IWAT.2015.7365343","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365343","url":null,"abstract":"A beam-squint-free leaky-wave antenna is one of potentially important applications of non-Foster metamaterials. However, several recent studies pointed out inherent stability problem of non-Foster elements, indicating that practical realization of leaky-wave antenna may be very challenging, if not entirely impossible. Here, we analyze the origin of stability issue and propose the design methodology that assures stable operation.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"40 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":"126087497","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.2015.7365321
M. Sumi, Keizo Cho, Yasunori Suzuki
We propose a new small multiband printed antenna for wireless telecommunications modules that actualizes Machine-to-Machine applications. The proposed antenna is based on our previous design comprising symmetrically arranged trapezoidal elements and rectangle strip elements. It achieves operation in quad-bands: 700 MHz, 800 MHz, 900 MHz, and 2 GHz. In the new antenna, we add new folded strip elements to cover the GSM 1800 (DCS 1800), GSM 1900 (PCS 1850), W-CDMA (Bands I, II, IV, and V), and LTE (Band 1) bands. The new antenna achieves operation in multiple bands including LTE (Band 28), GSM 900 (E-GSM 900), W-CDMA (Band VI), GSM 1800 (DCS 1800), GSM 1900 (PCS 1850), W-CDMA (Bands I, II, IV, and V), and LTE (Band 1). Frequency characteristics are analyzed using a simulator based on the method of moments, and the validity of the numerical results is shown based on measured Voltage Standing Wave Ratio characteristics of the prototype antenna.
{"title":"Printed antenna comprising symmetrically arranged trapezoidal elements, rectangle strip elements, and folded strip elements for GSM/W-CDMA/LTE M2M applications","authors":"M. Sumi, Keizo Cho, Yasunori Suzuki","doi":"10.1109/IWAT.2015.7365321","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365321","url":null,"abstract":"We propose a new small multiband printed antenna for wireless telecommunications modules that actualizes Machine-to-Machine applications. The proposed antenna is based on our previous design comprising symmetrically arranged trapezoidal elements and rectangle strip elements. It achieves operation in quad-bands: 700 MHz, 800 MHz, 900 MHz, and 2 GHz. In the new antenna, we add new folded strip elements to cover the GSM 1800 (DCS 1800), GSM 1900 (PCS 1850), W-CDMA (Bands I, II, IV, and V), and LTE (Band 1) bands. The new antenna achieves operation in multiple bands including LTE (Band 28), GSM 900 (E-GSM 900), W-CDMA (Band VI), GSM 1800 (DCS 1800), GSM 1900 (PCS 1850), W-CDMA (Bands I, II, IV, and V), and LTE (Band 1). Frequency characteristics are analyzed using a simulator based on the method of moments, and the validity of the numerical results is shown based on measured Voltage Standing Wave Ratio characteristics of the prototype antenna.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"32 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":"125129385","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}
This paper presents the development of a technique which attempts to characterizes the ground plane characteristics via measurement. The mean effective gain, which assesses the general property of antenna reception capability in the environment, has been used for handset antennas such as GPS reception antennas. However, current models are established on a rough assumption about the ground properties and employ statistical models to address the ground reflection. In this work, we try to assess ground properties using actual measurements. The results can be forwarded to establish a physic-based ground reflection model for antenna mean effective gain assessment.
{"title":"Ground reflection mesurements for develpoment of a physical mean effective gain modal applicable to portable device antennas","authors":"Xin-Xiong Chen, Wen-Jiao Liao, Bang-Yun Dai, Yi-Ane Chen","doi":"10.1109/IWAT.2015.7365366","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365366","url":null,"abstract":"This paper presents the development of a technique which attempts to characterizes the ground plane characteristics via measurement. The mean effective gain, which assesses the general property of antenna reception capability in the environment, has been used for handset antennas such as GPS reception antennas. However, current models are established on a rough assumption about the ground properties and employ statistical models to address the ground reflection. In this work, we try to assess ground properties using actual measurements. The results can be forwarded to establish a physic-based ground reflection model for antenna mean effective gain assessment.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"25 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":"128797083","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.2015.7365277
Dongho Kim
We propose a new method to increase both an antenna input reflection coefficient (S11) and overall efficiency of a Fabry-Perot cavity (FPC) antenna. In general, the FPC antenna consists of a partially reflective superstrate and a metal ground plane. By finding optimum arrangement of unit cells in the superstrate, we prove that we can largely widen an impedance matching bandwidth and raise overall efficiency at the same time. In addition, we also show that our method minimizes the reduction of antenna gain, which is difficult to avoid by expanding of the impedance bandwidth. All experimental results show good agreement with the prediction, which verifies the validity of our approach.
{"title":"Optimization of a Fabry-Perot cavity antenna","authors":"Dongho Kim","doi":"10.1109/IWAT.2015.7365277","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365277","url":null,"abstract":"We propose a new method to increase both an antenna input reflection coefficient (S11) and overall efficiency of a Fabry-Perot cavity (FPC) antenna. In general, the FPC antenna consists of a partially reflective superstrate and a metal ground plane. By finding optimum arrangement of unit cells in the superstrate, we prove that we can largely widen an impedance matching bandwidth and raise overall efficiency at the same time. In addition, we also show that our method minimizes the reduction of antenna gain, which is difficult to avoid by expanding of the impedance bandwidth. All experimental results show good agreement with the prediction, which verifies the validity of our approach.","PeriodicalId":342623,"journal":{"name":"2015 International Workshop on Antenna Technology (iWAT)","volume":"49 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":"131514813","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.2015.7365263
C. Chan, K. Ng, S. Qu
Low-cost terahertz Fresnel zone plate lens (FZPL) antennas have been previously constructed using generic PTFE substrate with simple plated-through-hole and printed-circuit technologies. Equal and symmetric E- and H-plane radiation patterns are then obtained through the use of a complementary source technique applied to an open-ended rectangular waveguide. In this paper, we present our recent efforts in enhancing the antenna gains. By the combination of increasing the number of zones and removing the substrate in the zone regions, the antenna gain can be increased by 3.18 dB. Other gain enhancement can also be achieved by adding re-radiating elements on the rings or modifying the reflecting ground plate with a grating.
{"title":"Gain enhancement for low-cost terahertz fresnel zone plate lens antennas","authors":"C. Chan, K. Ng, S. Qu","doi":"10.1109/IWAT.2015.7365263","DOIUrl":"https://doi.org/10.1109/IWAT.2015.7365263","url":null,"abstract":"Low-cost terahertz Fresnel zone plate lens (FZPL) antennas have been previously constructed using generic PTFE substrate with simple plated-through-hole and printed-circuit technologies. Equal and symmetric E- and H-plane radiation patterns are then obtained through the use of a complementary source technique applied to an open-ended rectangular waveguide. In this paper, we present our recent efforts in enhancing the antenna gains. By the combination of increasing the number of zones and removing the substrate in the zone regions, the antenna gain can be increased by 3.18 dB. Other gain enhancement can also be achieved by adding re-radiating elements on the rings or modifying the reflecting ground plate with a grating.","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":"132058189","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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