Pub Date : 2009-03-02DOI: 10.1109/IWAT.2009.4906898
Kejun Tan, Xiu-zhen Luan
A compact directional coupler based on substrate integrated waveguide is proposed. This coupler consists of two narrow apertures on the common broadside wall of two adjacent SIWs and four microstrip stepwise impedance convertors. Attractive features including compact size and planar form make this coupler structure easily integrated in antenna beam-forming networks. A coupler operating at Ka-band is designed. The coupling is about 7 dB at 31GHz, the isolation is below 18dB over the frequency range of 30.55–31.2 GHz, and the return loss is better than 10dB from 30.3 to 31.4 GHz. Design considerations and results are discussed and presented.
{"title":"Compact directional coupler based on substrate integrated waveguide","authors":"Kejun Tan, Xiu-zhen Luan","doi":"10.1109/IWAT.2009.4906898","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906898","url":null,"abstract":"A compact directional coupler based on substrate integrated waveguide is proposed. This coupler consists of two narrow apertures on the common broadside wall of two adjacent SIWs and four microstrip stepwise impedance convertors. Attractive features including compact size and planar form make this coupler structure easily integrated in antenna beam-forming networks. A coupler operating at Ka-band is designed. The coupling is about 7 dB at 31GHz, the isolation is below 18dB over the frequency range of 30.55–31.2 GHz, and the return loss is better than 10dB from 30.3 to 31.4 GHz. Design considerations and results are discussed and presented.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133690500","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906917
C. Kakoyiannis, A. Kyrligkitsi, P. Constantinou
We designed low-cost, wideband, printed inverted-F antennas at 2–3 GHz according to the size and bandwidth constraints of multimedia sensor networks. We used a slotted structure to excite two frequency-adjacent modes; herein we present the performance comparison of three such slotted antennas. A suitable scalar quantity is used for the comparison of overall performance. Antenna performance depends heavily on electrical size, which depends on the size of the ground plane. Our results show that Euclidean and fractal slot topologies can reduce size and augment bandwidth, but at different scales, and large ground planes do not warrant for better performance.
{"title":"Enhanced-bandwidth printed inverted-F antennas for multimedia sensor networks operating in the 2-3 GHz range","authors":"C. Kakoyiannis, A. Kyrligkitsi, P. Constantinou","doi":"10.1109/IWAT.2009.4906917","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906917","url":null,"abstract":"We designed low-cost, wideband, printed inverted-F antennas at 2–3 GHz according to the size and bandwidth constraints of multimedia sensor networks. We used a slotted structure to excite two frequency-adjacent modes; herein we present the performance comparison of three such slotted antennas. A suitable scalar quantity is used for the comparison of overall performance. Antenna performance depends heavily on electrical size, which depends on the size of the ground plane. Our results show that Euclidean and fractal slot topologies can reduce size and augment bandwidth, but at different scales, and large ground planes do not warrant for better performance.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"237 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134006959","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906870
Manoj Singh, A. Basu, S. Koul
Novel microstrip antennas with reconfigurable resonant frequency capability are proposed. The antennas consist of two radiating rectangular patches, connected by thin metallic strip incorporating a PIN diode in between. By controlling the PIN diode bias voltage, the antenna can be switched between two different frequencies. Both simulation and experimental results indicate that without any additional matching elements, the proposed antennas demonstrates very good input match at all the resonant frequencies.
{"title":"Switchable frequency bands microstrip antennas","authors":"Manoj Singh, A. Basu, S. Koul","doi":"10.1109/IWAT.2009.4906870","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906870","url":null,"abstract":"Novel microstrip antennas with reconfigurable resonant frequency capability are proposed. The antennas consist of two radiating rectangular patches, connected by thin metallic strip incorporating a PIN diode in between. By controlling the PIN diode bias voltage, the antenna can be switched between two different frequencies. Both simulation and experimental results indicate that without any additional matching elements, the proposed antennas demonstrates very good input match at all the resonant frequencies.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132153493","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906903
A. Emhemmed, K. Elgaid, L. B. Lok
We have proposed 3-D micromachined elevated patch antenna for G-band (140GHz to 220GHz) applications. The antenna is consisted of coplanar waveguide (CPW) feed line, a feeding post, air-bridge, supporting posts, and elevated patch. The antenna topology effectively creates a low dielectric substrate and undesired substrate effects can be eliminated, since the antenna substrate is essentially air which the lowest possible dielectric constant. This will increase the radiation efficiency, gain, and the radiation bandwidth. The measurement result shows the bandwidth is about 7GHz, from 170GHz to 177GHz with nearly constant broadside radiation pattern. Also, this work has demonstrated the capability of fabricating a high performance antenna design in a MMICs compatible process.
{"title":"Integrated micromachined millimeter wave patch antenna","authors":"A. Emhemmed, K. Elgaid, L. B. Lok","doi":"10.1109/IWAT.2009.4906903","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906903","url":null,"abstract":"We have proposed 3-D micromachined elevated patch antenna for G-band (140GHz to 220GHz) applications. The antenna is consisted of coplanar waveguide (CPW) feed line, a feeding post, air-bridge, supporting posts, and elevated patch. The antenna topology effectively creates a low dielectric substrate and undesired substrate effects can be eliminated, since the antenna substrate is essentially air which the lowest possible dielectric constant. This will increase the radiation efficiency, gain, and the radiation bandwidth. The measurement result shows the bandwidth is about 7GHz, from 170GHz to 177GHz with nearly constant broadside radiation pattern. Also, this work has demonstrated the capability of fabricating a high performance antenna design in a MMICs compatible process.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114944277","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906933
Norberto Lopez, Cheng-Jung Lee, A. Gummalla, M. Achour
In the digital world, Moore's Law states the number of transistors on Integrated Circuits (ICs) has been doubling every two years since 1965. While these ICs occupy only 10% of the wireless communication device area, the remaining 90%, referred to as RF Front-End Model (FEM), consists of a collection of discrete passive and active components such as antennas, filters, diplexer, duplexers, couplers, power combiner/splitter, and power amplifiers. While these powerful ICs enable effective implementation of Multiple Input Multiple Output (MIMO) digital processing, the main issue of MIMO RF FEM implementation in small devices such as handsets still remains unsolved. Without such a full solution, network providers cannot deploy next generation wireless broadband networks, such as 3GPP Long Term Evolution (LTE) networks, that can sustain tens of Mbps throughput with mobility. This paper addresses this specific problem by presenting an LTE MIMO air interface solution for handsets using metamaterial designs, which offer small, low-cost, and low-profile antennas printed directly on PCB for easy integration and simple manufacturing - all critical factors for rapid deployment and commercial success. The proposed metamaterial MIMO array consists of dual resonance antennas occupying λ0/10 × λ0/41 × λ0/387 volume at center frequency 771MHz of the LTE band 746–796MHz. The performances of two antenna array configurations with spacing of λ0/13 and λ0/5 are studied while quantifying its near-filed and far-field channel correlation.
{"title":"Compact metamaterial antenna array for long term evolution (LTE) handset application","authors":"Norberto Lopez, Cheng-Jung Lee, A. Gummalla, M. Achour","doi":"10.1109/IWAT.2009.4906933","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906933","url":null,"abstract":"In the digital world, Moore's Law states the number of transistors on Integrated Circuits (ICs) has been doubling every two years since 1965. While these ICs occupy only 10% of the wireless communication device area, the remaining 90%, referred to as RF Front-End Model (FEM), consists of a collection of discrete passive and active components such as antennas, filters, diplexer, duplexers, couplers, power combiner/splitter, and power amplifiers. While these powerful ICs enable effective implementation of Multiple Input Multiple Output (MIMO) digital processing, the main issue of MIMO RF FEM implementation in small devices such as handsets still remains unsolved. Without such a full solution, network providers cannot deploy next generation wireless broadband networks, such as 3GPP Long Term Evolution (LTE) networks, that can sustain tens of Mbps throughput with mobility. This paper addresses this specific problem by presenting an LTE MIMO air interface solution for handsets using metamaterial designs, which offer small, low-cost, and low-profile antennas printed directly on PCB for easy integration and simple manufacturing - all critical factors for rapid deployment and commercial success. The proposed metamaterial MIMO array consists of dual resonance antennas occupying λ0/10 × λ0/41 × λ0/387 volume at center frequency 771MHz of the LTE band 746–796MHz. The performances of two antenna array configurations with spacing of λ0/13 and λ0/5 are studied while quantifying its near-filed and far-field channel correlation.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115424190","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906971
W. Hong, Yan Zhang, Yuandan Dong, Jianyi Zhou, Xiaowei Zhu, Zhenqi Kuai, Chen Yu, Jixin Chen
The onboard wireless communication in an airplane is very attractive for it can provide data, audio and video services very conveniently. Because many radio equipments should be powered down in the airplane, the available frequency band for broadband communication is very wide. The frequency used in the airplane should be carefully allocated so that the onboard communication system does not affect the navigation systems. Besides, the outband spur emission should be suppressed to a sufficient level in the frequency band of the navigation systems. Generally, the spur suppression can be realized by good system schemes, high performance filters, multiple frequency notched wide band antennas, etc. In this paper, the recent advance in the design and development of ultra wideband (UWB) antennas with multiple frequency notched bands for onboard communications in SKLMMW is reviewed.
{"title":"UWB antenna with multiple frequency notched bands for onboard communications","authors":"W. Hong, Yan Zhang, Yuandan Dong, Jianyi Zhou, Xiaowei Zhu, Zhenqi Kuai, Chen Yu, Jixin Chen","doi":"10.1109/IWAT.2009.4906971","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906971","url":null,"abstract":"The onboard wireless communication in an airplane is very attractive for it can provide data, audio and video services very conveniently. Because many radio equipments should be powered down in the airplane, the available frequency band for broadband communication is very wide. The frequency used in the airplane should be carefully allocated so that the onboard communication system does not affect the navigation systems. Besides, the outband spur emission should be suppressed to a sufficient level in the frequency band of the navigation systems. Generally, the spur suppression can be realized by good system schemes, high performance filters, multiple frequency notched wide band antennas, etc. In this paper, the recent advance in the design and development of ultra wideband (UWB) antennas with multiple frequency notched bands for onboard communications in SKLMMW is reviewed.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126278861","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906929
Anil Kavala, P. N. Kondekar, Yang Sun
This paper presents a 1.2 V pseudo differential, symmetric CMOS Operational Transconductance Amplifier (OTA) by using linearity improvement method for ultra-high frequency (UHF) OTA-C filters. Simulation results show a unity gain bandwidth of 1.2 GHz and a transconductance of 2.15 mS with a good linearity of 7dBm. The power consumption of the proposed OTA is 1.1 mW. The proposed OTA is used to design a 9th order 400 MHz chebyshev I low-pass filter by using 0.13 μm technology. This filter has an attenuation of 30 dB at 600 MHz and it consumes only 13 mW.
{"title":"A low voltage, low power linear pseudo differential OTA for ultra-high frequency applications","authors":"Anil Kavala, P. N. Kondekar, Yang Sun","doi":"10.1109/IWAT.2009.4906929","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906929","url":null,"abstract":"This paper presents a 1.2 V pseudo differential, symmetric CMOS Operational Transconductance Amplifier (OTA) by using linearity improvement method for ultra-high frequency (UHF) OTA-C filters. Simulation results show a unity gain bandwidth of 1.2 GHz and a transconductance of 2.15 mS with a good linearity of 7dBm. The power consumption of the proposed OTA is 1.1 mW. The proposed OTA is used to design a 9th order 400 MHz chebyshev I low-pass filter by using 0.13 μm technology. This filter has an attenuation of 30 dB at 600 MHz and it consumes only 13 mW.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126294206","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906956
K. Warnick, B. Jeffs, J. Landon, J. Waldron, D. Jones, J. Fisher, R. Norrod
Instrumentation for radio astronomical observations is currently undergoing a transition from large reflectors with single-pixel feeds to multi-pixel phased arrays. Research efforts aimed at realizing the benefits of phased arrays for highly sensitive, calibrated astronomical measurements have opened up interesting challenges for antenna designers. This paper surveys recent theoretical and experimental results on characterization of beam equivalent noise temperature and efficiency, impedance matching to minimize front end noise, and beamforming and calibration algorithms for phased array feeds.
{"title":"Phased array antenna design and characterization for next-generation radio telescopes","authors":"K. Warnick, B. Jeffs, J. Landon, J. Waldron, D. Jones, J. Fisher, R. Norrod","doi":"10.1109/IWAT.2009.4906956","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906956","url":null,"abstract":"Instrumentation for radio astronomical observations is currently undergoing a transition from large reflectors with single-pixel feeds to multi-pixel phased arrays. Research efforts aimed at realizing the benefits of phased arrays for highly sensitive, calibrated astronomical measurements have opened up interesting challenges for antenna designers. This paper surveys recent theoretical and experimental results on characterization of beam equivalent noise temperature and efficiency, impedance matching to minimize front end noise, and beamforming and calibration algorithms for phased array feeds.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"97 7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127467155","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906937
Phillip Izdebski, H. Rajagopalan, Y. Rahmat-Samii
This paper presents a novel ingestible capsule antenna, the conformal chandelier meandered dipole antenna (CCMDA), as a practical and effective design for bio-telemetry. The CCMDA is a conformal version of the offset planar meandered dipole antenna (OPMDA). The similarities in performance between the two antennas are presented through simulations. The CCMDA is further investigated and through simulation, it is shown to have inherent advantages due to its conformal geometry, which allows for tightly packed electrical components within the capsule, and polarization diversity that enables a communication link, which is not strongly sensitive to the orientation of the capsule within the human body. The capsule antenna is then simulated within a 4 mm precision human-body model (Ansoft) where the detuning effects along with the polarization and radiation pattern are investigated and discussed.
{"title":"Ingestible capsule antenna for bio-telemetry","authors":"Phillip Izdebski, H. Rajagopalan, Y. Rahmat-Samii","doi":"10.1109/IWAT.2009.4906937","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906937","url":null,"abstract":"This paper presents a novel ingestible capsule antenna, the conformal chandelier meandered dipole antenna (CCMDA), as a practical and effective design for bio-telemetry. The CCMDA is a conformal version of the offset planar meandered dipole antenna (OPMDA). The similarities in performance between the two antennas are presented through simulations. The CCMDA is further investigated and through simulation, it is shown to have inherent advantages due to its conformal geometry, which allows for tightly packed electrical components within the capsule, and polarization diversity that enables a communication link, which is not strongly sensitive to the orientation of the capsule within the human body. The capsule antenna is then simulated within a 4 mm precision human-body model (Ansoft) where the detuning effects along with the polarization and radiation pattern are investigated and discussed.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121791193","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 : 2009-03-02DOI: 10.1109/IWAT.2009.4906904
A. Sellier, S. Burokur, B. Kanté, A. Lustrac
We present, design and analyze a novel planar Left-Handed (LH) metamaterial in the microwave region. This metamaterial is composed of only cut metallic wires and is used under normal-to-plane incidence. Using Finite Element Method (FEM) based simulations and microwave experiments, we have investigated the material properties of the structure. Simultaneous negative values are observed for the permittivity ε and permeability μ by the inversion method from the transmission and reflection responses. A negative index n is verified in a bulk prism engineered by stacking several layers of the metamaterial. Our work demonstrates the feasibility of a LH metamaterial composed of only cut wires.
{"title":"Novel cut wires metamaterial exhibiting negative refractive index","authors":"A. Sellier, S. Burokur, B. Kanté, A. Lustrac","doi":"10.1109/IWAT.2009.4906904","DOIUrl":"https://doi.org/10.1109/IWAT.2009.4906904","url":null,"abstract":"We present, design and analyze a novel planar Left-Handed (LH) metamaterial in the microwave region. This metamaterial is composed of only cut metallic wires and is used under normal-to-plane incidence. Using Finite Element Method (FEM) based simulations and microwave experiments, we have investigated the material properties of the structure. Simultaneous negative values are observed for the permittivity ε and permeability μ by the inversion method from the transmission and reflection responses. A negative index n is verified in a bulk prism engineered by stacking several layers of the metamaterial. Our work demonstrates the feasibility of a LH metamaterial composed of only cut wires.","PeriodicalId":166472,"journal":{"name":"2009 IEEE International Workshop on Antenna Technology","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129117395","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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