Pub Date : 2010-03-01DOI: 10.1109/IWAT.2010.5464635
S. Kim, J. Jang
An LC-loaded folded monopole antenna including two meander-line inductors and an interdigitated capacitor was designed for a miniaturization of antenna. The operating frequency of the antenna was essentially determined by the resonant characteristics of the uniquely arranged distributed inductors and capacitor, not by the length of the radiator, so that the size of the antenna can be designed to be very small. The radiator length of the designed antenna is 0.077 λ0. It was also found that the effect of the size of the ground plane on the antenna performance such as resonant frequency and bandwidth is minimal.
{"title":"Compact folded monopole antenna with LC-loadings","authors":"S. Kim, J. Jang","doi":"10.1109/IWAT.2010.5464635","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464635","url":null,"abstract":"An LC-loaded folded monopole antenna including two meander-line inductors and an interdigitated capacitor was designed for a miniaturization of antenna. The operating frequency of the antenna was essentially determined by the resonant characteristics of the uniquely arranged distributed inductors and capacitor, not by the length of the radiator, so that the size of the antenna can be designed to be very small. The radiator length of the designed antenna is 0.077 λ0. It was also found that the effect of the size of the ground plane on the antenna performance such as resonant frequency and bandwidth is minimal.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131114500","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464781
H. Chattha, Yi Huang, Xu Zhu, Yang Lu
This paper presents a novel dual-feed Planar Inverted-F Antenna (PIFA) for MIMO radio communication systems at 2.45 GHz. This antenna contains only one radiating plate with two matched and isolated ports. To reduce the mutual coupling and to achieve a good isolation, ground plane under the top radiating plate is etched. The calculated envelope cross-correlation is less than 0.02 and the ratio of the mean effective gain between the two ports is close to unity. It is shown that a single PIFA antenna can be used instead of two antennas for diversity gain which is an excellent solution for saving the space and cost. Simulated and measured results are provided to verify the conclusion.
{"title":"A dual feed PIFA diversity antenna for MIMO systems","authors":"H. Chattha, Yi Huang, Xu Zhu, Yang Lu","doi":"10.1109/IWAT.2010.5464781","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464781","url":null,"abstract":"This paper presents a novel dual-feed Planar Inverted-F Antenna (PIFA) for MIMO radio communication systems at 2.45 GHz. This antenna contains only one radiating plate with two matched and isolated ports. To reduce the mutual coupling and to achieve a good isolation, ground plane under the top radiating plate is etched. The calculated envelope cross-correlation is less than 0.02 and the ratio of the mean effective gain between the two ports is close to unity. It is shown that a single PIFA antenna can be used instead of two antennas for diversity gain which is an excellent solution for saving the space and cost. Simulated and measured results are provided to verify the conclusion.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132771692","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464644
H. Abutarboush, R. Nilavalan, K. Nasr, H. Al-Raweshidy, D. Budimir, M. Alexander
This paper presents a design of a compact microstrip patch antenna with the ability of controlling the number of bands and the operating frequencies independently. The antenna comprises a main patch and four sub-patches fed by a 50Ω microstrip line. It is designed to generate up to five separate modes to cover the frequency range from 900 MHz to 3 GHz for the operation of wireless devices supporting multiple standards including Global System for Mobile communication (GSM900, 880–960 MHz), Digital Communication System (DCS1800, 1710–1880 MHz), Universal Mobile Telecommunication System (UMTS, 1920–2170 MHz), Wireless Local Area Network (WLAN, 2400–2483.5 MHz) and low band Worldwide Interoperability for Microwave Access (WIMAX, 2.5 to 2.8 GHz) The design verified through both numerical simulation and measurement of an experimental prototype.
{"title":"A compact printed antenna for multiband wireless applications","authors":"H. Abutarboush, R. Nilavalan, K. Nasr, H. Al-Raweshidy, D. Budimir, M. Alexander","doi":"10.1109/IWAT.2010.5464644","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464644","url":null,"abstract":"This paper presents a design of a compact microstrip patch antenna with the ability of controlling the number of bands and the operating frequencies independently. The antenna comprises a main patch and four sub-patches fed by a 50Ω microstrip line. It is designed to generate up to five separate modes to cover the frequency range from 900 MHz to 3 GHz for the operation of wireless devices supporting multiple standards including Global System for Mobile communication (GSM900, 880–960 MHz), Digital Communication System (DCS1800, 1710–1880 MHz), Universal Mobile Telecommunication System (UMTS, 1920–2170 MHz), Wireless Local Area Network (WLAN, 2400–2483.5 MHz) and low band Worldwide Interoperability for Microwave Access (WIMAX, 2.5 to 2.8 GHz) The design verified through both numerical simulation and measurement of an experimental prototype.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133818950","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464654
W. Moulder, W. Khalil, J. Volakis
A 60 GHz volumetrically scanning array employing a switched beam network is presented. Unlike existing switched beam networks operating at this band, the proposed network realizes volumetric scanning without using multiple switching stages. The network operates in the entire unlicensed 60 GHz band (57–64 GHz) via an innovative delay structure to compensate for the phase shift caused by the planar RF crossovers employed in the network. In this paper, we describe the beamforming network and accompanying aperture-coupled patch array. Relevant simulation results are presented to demonstrate the RF front-end operation.
{"title":"60 GHz volumetric switched beam array","authors":"W. Moulder, W. Khalil, J. Volakis","doi":"10.1109/IWAT.2010.5464654","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464654","url":null,"abstract":"A 60 GHz volumetrically scanning array employing a switched beam network is presented. Unlike existing switched beam networks operating at this band, the proposed network realizes volumetric scanning without using multiple switching stages. The network operates in the entire unlicensed 60 GHz band (57–64 GHz) via an innovative delay structure to compensate for the phase shift caused by the planar RF crossovers employed in the network. In this paper, we describe the beamforming network and accompanying aperture-coupled patch array. Relevant simulation results are presented to demonstrate the RF front-end operation.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124387284","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464680
D. Nešić, B. Kolundžija
Based on the well known theory of infinite periodic structures, analytical theory of EBG (electromagnetic band gap) cells suppressing 3 higher (spurious) stop-bands is developed. Using such cells in a cascade the straight-forward procedure for design of the corresponding EBG band-stop filter is proposed, with possibility to control the width and the depth of the stop-band. The analytical theory is confirmed by the EM simulation of a filter realized in the microstrip technology and by measurement of the fabricated model.
{"title":"EBG band-stop filter with suppression of 3 spurious stop-bands","authors":"D. Nešić, B. Kolundžija","doi":"10.1109/IWAT.2010.5464680","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464680","url":null,"abstract":"Based on the well known theory of infinite periodic structures, analytical theory of EBG (electromagnetic band gap) cells suppressing 3 higher (spurious) stop-bands is developed. Using such cells in a cascade the straight-forward procedure for design of the corresponding EBG band-stop filter is proposed, with possibility to control the width and the depth of the stop-band. The analytical theory is confirmed by the EM simulation of a filter realized in the microstrip technology and by measurement of the fabricated model.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116999930","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464863
Bangda Zhou, Jun-ping Geng, R. Jin, Xianling Liang, Sheng Ye
A novel method to design patch antenna with computer-aid is presented in this paper. Smooth curve is used to generate the border of the patch antenna; and particle swarm optimization (PSO) algorithm is implemented to control the shape of the patch, which leads the result less dependent on designer's experience and more reasonable. Finite Difference Time Domain (FDTD) algorithm is used for electromagnetic simulation. The optimization of process is conducted on the parallel cluster to reduce computational time. To verify the correctness of this method, an antenna working on WLAN band has been optimized and fabricated. The experiment result is showed in the end.
{"title":"The optimal design of patch antennas with smooth border","authors":"Bangda Zhou, Jun-ping Geng, R. Jin, Xianling Liang, Sheng Ye","doi":"10.1109/IWAT.2010.5464863","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464863","url":null,"abstract":"A novel method to design patch antenna with computer-aid is presented in this paper. Smooth curve is used to generate the border of the patch antenna; and particle swarm optimization (PSO) algorithm is implemented to control the shape of the patch, which leads the result less dependent on designer's experience and more reasonable. Finite Difference Time Domain (FDTD) algorithm is used for electromagnetic simulation. The optimization of process is conducted on the parallel cluster to reduce computational time. To verify the correctness of this method, an antenna working on WLAN band has been optimized and fabricated. The experiment result is showed in the end.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123713240","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464660
Kai-fong Lee, K. Luk, K. Mak
Patch antennas fed by meandering or M-probes have the advantage of low cross polarization, compared to the case of feeding by L-probes. In this paper, the general method of using U-slots to design dual/triple band patch antennas is applied to M-probe fed patch antennas. Several of these antennas have been fabricated and measured. Simulation results using Zeland IE3D software agree well with measured results. It is found that, in order to preserve the low cross polarization characteristics, a pair of face-to-face U-slots are needed for the dual band case while two pairs of such U-slots are required for the triple band cases.
{"title":"Dual and triple band patch antennas fed by meandering probe","authors":"Kai-fong Lee, K. Luk, K. Mak","doi":"10.1109/IWAT.2010.5464660","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464660","url":null,"abstract":"Patch antennas fed by meandering or M-probes have the advantage of low cross polarization, compared to the case of feeding by L-probes. In this paper, the general method of using U-slots to design dual/triple band patch antennas is applied to M-probe fed patch antennas. Several of these antennas have been fabricated and measured. Simulation results using Zeland IE3D software agree well with measured results. It is found that, in order to preserve the low cross polarization characteristics, a pair of face-to-face U-slots are needed for the dual band case while two pairs of such U-slots are required for the triple band cases.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126194889","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464856
C. Luxey, D. Manteuffel
In this paper, we focus on highly-efficient multiple antenna-systems for small MIMO communicating devices. First, we perform a state-of-the art review of the best solutions developed by various researchers. Then we consider some fundamental aspects involved when integrating multiple antennas in a small terminal. Thereafter, we present several multiple antenna-systems designed at the LEAT of the University of Nice-Sophia Antipolis since 2004. We especially describe our neutralization technique dedicated to enhance the total efficiency of several radiators when they are closely placed over the same small ground plane. Last, we try to identify promising solutions and future trends.
{"title":"Highly-efficient multiple antenna-systems for small MIMO devices","authors":"C. Luxey, D. Manteuffel","doi":"10.1109/IWAT.2010.5464856","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464856","url":null,"abstract":"In this paper, we focus on highly-efficient multiple antenna-systems for small MIMO communicating devices. First, we perform a state-of-the art review of the best solutions developed by various researchers. Then we consider some fundamental aspects involved when integrating multiple antennas in a small terminal. Thereafter, we present several multiple antenna-systems designed at the LEAT of the University of Nice-Sophia Antipolis since 2004. We especially describe our neutralization technique dedicated to enhance the total efficiency of several radiators when they are closely placed over the same small ground plane. Last, we try to identify promising solutions and future trends.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121592266","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464871
U. Chandra, H. Abutarboush, H. Al-Raweshidy, R. Nilavalan
A slotted microstrip patch antenna is designed with Electromagnetic Band gap (EBG) structures. The performance parameters of the presented antenna are then compared with the conventional patch antenna. It is realized that there is a significant increase of bandwidth and better suppression of harmonics than the normal patch antenna. This antenna is thus operating in the frequency band 5 – 6 GHz which is one of the most usable bandwidth regions for wireless applications such as WiMAX, WiFi outdoor, WLAN, Hiperlan/2 and many more. The proposed antenna achieves a gain between 4 to 6 dBi built in FR-4 material.
{"title":"Wideband slotted patch antennas using EBG structures","authors":"U. Chandra, H. Abutarboush, H. Al-Raweshidy, R. Nilavalan","doi":"10.1109/IWAT.2010.5464871","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464871","url":null,"abstract":"A slotted microstrip patch antenna is designed with Electromagnetic Band gap (EBG) structures. The performance parameters of the presented antenna are then compared with the conventional patch antenna. It is realized that there is a significant increase of bandwidth and better suppression of harmonics than the normal patch antenna. This antenna is thus operating in the frequency band 5 – 6 GHz which is one of the most usable bandwidth regions for wireless applications such as WiMAX, WiFi outdoor, WLAN, Hiperlan/2 and many more. The proposed antenna achieves a gain between 4 to 6 dBi built in FR-4 material.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114299701","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 : 2010-03-01DOI: 10.1109/IWAT.2010.5464744
A. Othman, M. F. Ain, S. Hassan, A. A. Sulaiman, M. A. Othman, M. Hamid, R. Majid, M.Z. Saidin, M.N. Ismail, M.R. Jaffar
A practical horn antenna feeding configuration for use at Ka-band frequencies is proposed. It is consists of five circular identical cylindrical parasitic dielectric resonator (DR) fed by a microstrip feedline through a coupling rectangular slot in the ground plane between them. It is designed to parasitic type for high gain, high isolation and wideband characteristics. The bandwidth enhancement is achieved for the HEM11δ mode with the parasitic resonators superimposed on driven DR. Excellent return loss and radiation characteristics of DR in HEM11δ were observed. CST simulation results of the electrical performance for pyramidal horn antenna operating at 38GHz are presented.
{"title":"A novel feeding technique for Ka-band horn antenna","authors":"A. Othman, M. F. Ain, S. Hassan, A. A. Sulaiman, M. A. Othman, M. Hamid, R. Majid, M.Z. Saidin, M.N. Ismail, M.R. Jaffar","doi":"10.1109/IWAT.2010.5464744","DOIUrl":"https://doi.org/10.1109/IWAT.2010.5464744","url":null,"abstract":"A practical horn antenna feeding configuration for use at Ka-band frequencies is proposed. It is consists of five circular identical cylindrical parasitic dielectric resonator (DR) fed by a microstrip feedline through a coupling rectangular slot in the ground plane between them. It is designed to parasitic type for high gain, high isolation and wideband characteristics. The bandwidth enhancement is achieved for the HEM11δ mode with the parasitic resonators superimposed on driven DR. Excellent return loss and radiation characteristics of DR in HEM11δ were observed. CST simulation results of the electrical performance for pyramidal horn antenna operating at 38GHz are presented.","PeriodicalId":125732,"journal":{"name":"2010 International Workshop on Antenna Technology (iWAT)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133233874","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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