Pub Date : 2013-03-04DOI: 10.1109/IWAT.2013.6518317
L. Reichardt, S. Beer, T. Deißler, R. Salman, R. Zetik, T. Zwick
Ultra-wideband (UWB) technology promises interesting perspectives for short range sensing. This paper presents UWB antennas that are used by an autonomous operating robot in order to demonstrate different localization, object identification and imaging applications in real scenarios. As the different algorithms need special antenna solutions, three types of UWB antennas are developed. Two of them are dual-polarized to allow the use of polarization diversity. Further, the antennas differ in radiation pattern and location of the phase center in order to meet the requirements given by the manifold applications. The used frequency band covers 3.5 to 10.5 GHz.
{"title":"A dual-polarized UWB antenna system for the demonstration of autonomous localization and object recognition with mobile sensors","authors":"L. Reichardt, S. Beer, T. Deißler, R. Salman, R. Zetik, T. Zwick","doi":"10.1109/IWAT.2013.6518317","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518317","url":null,"abstract":"Ultra-wideband (UWB) technology promises interesting perspectives for short range sensing. This paper presents UWB antennas that are used by an autonomous operating robot in order to demonstrate different localization, object identification and imaging applications in real scenarios. As the different algorithms need special antenna solutions, three types of UWB antennas are developed. Two of them are dual-polarized to allow the use of polarization diversity. Further, the antennas differ in radiation pattern and location of the phase center in order to meet the requirements given by the manifold applications. The used frequency band covers 3.5 to 10.5 GHz.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124801947","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518332
S. Beer, B. Gottel, C. Rusch, H. Gulan, T. Zwick
This paper presents two specific antennas that can be integrated into a chip package. Both are optimized to be connectable to a single chip radar transceiver. Thus a fully integrated, surface-mountable and low-cost radar sensor results. The first antenna design is a double dipole antenna for a frequency range from 108 GHz to 129 GHz that can be connected to the MMIC using flip chip technology. The second antenna is a four element patch array with a series-parallel feed network and a bandwidth from 143 GHz to 154 GHz. It can be placed beside a MMIC and connected to it using wire bond technology. Details of both antennas are shortly explained. Afterwards measurement results are given.
{"title":"Off-chip antenna designs for fully integrated, low-cost millimeter-wave transceivers","authors":"S. Beer, B. Gottel, C. Rusch, H. Gulan, T. Zwick","doi":"10.1109/IWAT.2013.6518332","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518332","url":null,"abstract":"This paper presents two specific antennas that can be integrated into a chip package. Both are optimized to be connectable to a single chip radar transceiver. Thus a fully integrated, surface-mountable and low-cost radar sensor results. The first antenna design is a double dipole antenna for a frequency range from 108 GHz to 129 GHz that can be connected to the MMIC using flip chip technology. The second antenna is a four element patch array with a series-parallel feed network and a bandwidth from 143 GHz to 154 GHz. It can be placed beside a MMIC and connected to it using wire bond technology. Details of both antennas are shortly explained. Afterwards measurement results are given.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124656353","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518307
O. Alrabadi, E. Tsakalaki, M. Pelosi, G. Pedersen
The paper proposes a novel multi-input multi-output (MIMO) system architecture that covers most of the high LTE bands. The system is comprised of four small loop antennas. Each antenna has two ports, one for communication and one for control. The control port is used for tuning the loop antenna where impressive frequency agility using a single capacitor is obtained. A good level of inherent isolation among the four loop antennas is maintained over the different frequency bands. The MIMO performance of the proposed system is evaluated through its spectral efficiency versus frequency. Finally, the information bandwidth of the MIMO system can be defined by comparing its spectral efficiency against the spectral efficiency of three ideal MIMO antennas.
{"title":"Agile and efficient MIMO system for smart phone terminals","authors":"O. Alrabadi, E. Tsakalaki, M. Pelosi, G. Pedersen","doi":"10.1109/IWAT.2013.6518307","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518307","url":null,"abstract":"The paper proposes a novel multi-input multi-output (MIMO) system architecture that covers most of the high LTE bands. The system is comprised of four small loop antennas. Each antenna has two ports, one for communication and one for control. The control port is used for tuning the loop antenna where impressive frequency agility using a single capacitor is obtained. A good level of inherent isolation among the four loop antennas is maintained over the different frequency bands. The MIMO performance of the proposed system is evaluated through its spectral efficiency versus frequency. Finally, the information bandwidth of the MIMO system can be defined by comparing its spectral efficiency against the spectral efficiency of three ideal MIMO antennas.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126542932","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518352
Y. Ranga, D. Thalakotuna, K. Esselle, S. Hay, L. Matekovits, M. Orefice
In this paper a novel printed Frequency Selective Surface (FSS) transmission polarizer is presented. A width-modulated microstrip unit cell is used as the reference element, loaded by a capacitive tuning slot, to achieve the desired axial ratio (AR) performance for the transmitted electromagnetic wave. The dimensions of the unit cell are λ0/2×λ0/2 at 30 GHz. This polarizer provides an axial ratio of 0.99 at the resonance and a cross polarization lower than -20 dB in a more than 5% bandwidth. Theoretical analysis and results of numerical investigations related to the new structure are presented.
{"title":"A transmission polarizer based on width-modulated lines and slots","authors":"Y. Ranga, D. Thalakotuna, K. Esselle, S. Hay, L. Matekovits, M. Orefice","doi":"10.1109/IWAT.2013.6518352","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518352","url":null,"abstract":"In this paper a novel printed Frequency Selective Surface (FSS) transmission polarizer is presented. A width-modulated microstrip unit cell is used as the reference element, loaded by a capacitive tuning slot, to achieve the desired axial ratio (AR) performance for the transmitted electromagnetic wave. The dimensions of the unit cell are λ0/2×λ0/2 at 30 GHz. This polarizer provides an axial ratio of 0.99 at the resonance and a cross polarization lower than -20 dB in a more than 5% bandwidth. Theoretical analysis and results of numerical investigations related to the new structure are presented.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129492506","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518293
T. Hayashi, M. Nakano, A. Yamaguchi
In LTE (Long Term Evolution) or LTE-Advanced, MIMO (multiple-input, multiple-output) techniques have the potential to realize high throughput. In order to design and evaluate MIMO system, it is necessary to clarify the space-time path model at mobile station. By clarifying the propagation structure from AoA (angle-of-arrival) estimation it is possible to estimate the performance of MIMO system based on the real environment. AoA estimation accuracy is deteriorated by the constraint of the degree of freedom of the array antenna in multipath environment due to the increase in the incident wave. Therefore, we propose the method to separate each incident wave using the delay profile estimation and apply to the AoA estimation. Since AoA estimation is performed for each separate path, it is possible to overcome the constraint of the degree of freedom of the array antenna. As a result, it is expected to improve the estimation accuracy. The effectiveness of the proposed method is proved by computer simulation.
{"title":"Novel AoA estimation method using delay profile in downlink","authors":"T. Hayashi, M. Nakano, A. Yamaguchi","doi":"10.1109/IWAT.2013.6518293","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518293","url":null,"abstract":"In LTE (Long Term Evolution) or LTE-Advanced, MIMO (multiple-input, multiple-output) techniques have the potential to realize high throughput. In order to design and evaluate MIMO system, it is necessary to clarify the space-time path model at mobile station. By clarifying the propagation structure from AoA (angle-of-arrival) estimation it is possible to estimate the performance of MIMO system based on the real environment. AoA estimation accuracy is deteriorated by the constraint of the degree of freedom of the array antenna in multipath environment due to the increase in the incident wave. Therefore, we propose the method to separate each incident wave using the delay profile estimation and apply to the AoA estimation. Since AoA estimation is performed for each separate path, it is possible to overcome the constraint of the degree of freedom of the array antenna. As a result, it is expected to improve the estimation accuracy. The effectiveness of the proposed method is proved by computer simulation.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129500294","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518315
M. A. Castillo Solis, Zhipeng Wu, C. G. Liu
A transparent ceramic (TC) material with low relative dielectric constant of 7 has been used to form a rectangular dielectric resonator antenna (RDRA) working at the frequency of 5.05GHz. The TC-RDRA is fed by using a microstrip-strip structure. The performance of such an antenna has been investigated experimentally and by simulation. The experimental and simulation results have shown a good agreement.
{"title":"Microstrip-strip feed transparent ceramic rectangular dielectric resonator antenna","authors":"M. A. Castillo Solis, Zhipeng Wu, C. G. Liu","doi":"10.1109/IWAT.2013.6518315","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518315","url":null,"abstract":"A transparent ceramic (TC) material with low relative dielectric constant of 7 has been used to form a rectangular dielectric resonator antenna (RDRA) working at the frequency of 5.05GHz. The TC-RDRA is fed by using a microstrip-strip structure. The performance of such an antenna has been investigated experimentally and by simulation. The experimental and simulation results have shown a good agreement.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132291905","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518335
S. Salama, K. Solbach
Monopole radiators on finite ground planes may be used as elements of phased array antennas. A part from mutual coupling of array elements, the coupling to the current modes on the ground plane (“chassis modes”) has to be considered. The paper presents an investigation of the excitation of the first two chassis modes by a monopole radiator at two positions on a small rectangular ground plane. The effects of chassis mode excitation in the radiator impedance and radiation patterns are presented as well as the current distributions on the ground plane. A resonator-based equivalent circuit is shown to model closely the full-wave simulations and allowing the calculation of radiation contributions from the radiator and the chassis modes.
{"title":"Equivalent circuit modeling of monopoles on a small platform","authors":"S. Salama, K. Solbach","doi":"10.1109/IWAT.2013.6518335","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518335","url":null,"abstract":"Monopole radiators on finite ground planes may be used as elements of phased array antennas. A part from mutual coupling of array elements, the coupling to the current modes on the ground plane (“chassis modes”) has to be considered. The paper presents an investigation of the excitation of the first two chassis modes by a monopole radiator at two positions on a small rectangular ground plane. The effects of chassis mode excitation in the radiator impedance and radiation patterns are presented as well as the current distributions on the ground plane. A resonator-based equivalent circuit is shown to model closely the full-wave simulations and allowing the calculation of radiation contributions from the radiator and the chassis modes.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"232 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123544061","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518338
H. Gulan, S. Beer, S. Diebold, C. Rusch, A. Leuther, I. Kallfass, T. Zwick
In this paper a probe based measurement setup is presented that allows the characterization of antennas in the frequency-range between 220 GHz and 325 GHz. The radiation pattern, as well as the gain and the return loss of the antenna under test (AUT) can be measured. The limits of the system in terms of accuracy and dynamic range are given. To demonstrate its functionality a 240 GHz patch-antenna on Gallium Arsenide (GaAs) substrate is measured. A comparison between simulation and measurement shows very good agreement.
{"title":"Probe based antenna measurements up to 325 GHz for upcoming millimeter-wave applications","authors":"H. Gulan, S. Beer, S. Diebold, C. Rusch, A. Leuther, I. Kallfass, T. Zwick","doi":"10.1109/IWAT.2013.6518338","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518338","url":null,"abstract":"In this paper a probe based measurement setup is presented that allows the characterization of antennas in the frequency-range between 220 GHz and 325 GHz. The radiation pattern, as well as the gain and the return loss of the antenna under test (AUT) can be measured. The limits of the system in terms of accuracy and dynamic range are given. To demonstrate its functionality a 240 GHz patch-antenna on Gallium Arsenide (GaAs) substrate is measured. A comparison between simulation and measurement shows very good agreement.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126117162","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518323
S. Lindenmeier, L. Reiter, J. Kammerer, S. Senega
For mobile satellite radio reception in cars high demands are made to the antennas with respect to gain, efficiency, volume requirements and mounting conditions as well as reliable reception in fading environment. In comparison to common antennas for satellite digital audio radio services (SDARS) as well as for navigation services, new types of single satellite antennas and combinations for antenna diversity are shown. New ring antennas of type “Scarabeus” show a significantly higher performance compared to common patch antennas. In severe fading scenarios a set of up to three SDARS antennas, which are located together within a mounting volume of only around 1.5" × 1.5" × 0.5" together with an appropriate scan-phase diversity circuitry lead to a reduction of mute rates by more than one order of magnitude. This diversity technology enables for the first time the use of critical mounting positions like in side mirrors or on the dashboard, which would never be used for single antennas.
{"title":"Antenna technology for mobile satellite radio reception","authors":"S. Lindenmeier, L. Reiter, J. Kammerer, S. Senega","doi":"10.1109/IWAT.2013.6518323","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518323","url":null,"abstract":"For mobile satellite radio reception in cars high demands are made to the antennas with respect to gain, efficiency, volume requirements and mounting conditions as well as reliable reception in fading environment. In comparison to common antennas for satellite digital audio radio services (SDARS) as well as for navigation services, new types of single satellite antennas and combinations for antenna diversity are shown. New ring antennas of type “Scarabeus” show a significantly higher performance compared to common patch antennas. In severe fading scenarios a set of up to three SDARS antennas, which are located together within a mounting volume of only around 1.5\" × 1.5\" × 0.5\" together with an appropriate scan-phase diversity circuitry lead to a reduction of mute rates by more than one order of magnitude. This diversity technology enables for the first time the use of critical mounting positions like in side mirrors or on the dashboard, which would never be used for single antennas.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127424177","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 : 2013-03-04DOI: 10.1109/IWAT.2013.6518354
X. Sun, S. Cheung, T. Yuk
In this paper, the design of a dual-band antenna for universal-serial-bus (USB) dongle applications in the 2.4-GHz wireless-local-area network (WLAN) and 3.5-GHz Worldwide Interoperability for Microwave Access (WiMAX) systems is presented. The antenna consists of two folded inverted-F radiating elements. One inverted- F element generates a 2.45-GHz band for the WLAN band (2.4-2.484 GHz), and both inverted-F elements together resonate at around 3.5 GHz to generate a wide frequency band for the WiMAX system (3.3-3.8 GHz). The antenna is designed on a 25×70 mm2 printed-circuit board (PCB), same size of an USB dongle PCB. For verification of simulation results, a prototype is fabricated and measured. Measured results show that the antenna has two impedance bandwidths, 2.39-2.5 GHz and 3.24-3.8 GHz, for the WLAN and WiMAX applications, respectively. The simulated and measured radiation patterns, efficiencies and gains of the antenna are all presented.
{"title":"A dual-band antenna for wireless USB dongle applications","authors":"X. Sun, S. Cheung, T. Yuk","doi":"10.1109/IWAT.2013.6518354","DOIUrl":"https://doi.org/10.1109/IWAT.2013.6518354","url":null,"abstract":"In this paper, the design of a dual-band antenna for universal-serial-bus (USB) dongle applications in the 2.4-GHz wireless-local-area network (WLAN) and 3.5-GHz Worldwide Interoperability for Microwave Access (WiMAX) systems is presented. The antenna consists of two folded inverted-F radiating elements. One inverted- F element generates a 2.45-GHz band for the WLAN band (2.4-2.484 GHz), and both inverted-F elements together resonate at around 3.5 GHz to generate a wide frequency band for the WiMAX system (3.3-3.8 GHz). The antenna is designed on a 25×70 mm2 printed-circuit board (PCB), same size of an USB dongle PCB. For verification of simulation results, a prototype is fabricated and measured. Measured results show that the antenna has two impedance bandwidths, 2.39-2.5 GHz and 3.24-3.8 GHz, for the WLAN and WiMAX applications, respectively. The simulated and measured radiation patterns, efficiencies and gains of the antenna are all presented.","PeriodicalId":247542,"journal":{"name":"2013 International Workshop on Antenna Technology (iWAT)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126347835","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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