The Experts below are selected from a list of 111957 Experts worldwide ranked by ideXlab platform
Safieddin Safavinaeini - One of the best experts on this subject based on the ideXlab platform.
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millimeter wave high Radiation Efficiency planar waveguide series fed dielectric resonator antenna dra array analysis design and measurements
IEEE Transactions on Antennas and Propagation, 2011Co-Authors: Wael M Abdelwahab, Dan Busuioc, Safieddin SafavinaeiniAbstract:A low cost general architecture for a substrate integrated waveguide (SIW) series-fed dielectric resonator antenna (DRA) array, formed by two different slot polarizations, is proposed. In addition, a novel, simple, and generic transmission line (T.L.) circuit model, along with a fast and generic formulation for the new linear array antenna, is developed. The model can be used for reflection coefficient and Radiation pattern (gain) calculations. The experimental data from two linear array modules, operating at the millimeter-wave band, are used to verify the simulated results of HFSS and the proposed model results. The measured Radiation pattern for a 4 t 1 SIW-DRA array demonstrates a broadside beam with a radiated gain of 11.70 dB over an operating impedance bandwidth of 4.70%. Moreover, the simulated Radiation Efficiency is more than 90%.
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high Efficiency on chip dielectric resonator antenna for mm wave transceivers
IEEE Transactions on Antennas and Propagation, 2010Co-Authors: Mohammadreza Nezhadahmadi, Mohammad Fakharzadeh, B Biglarbegian, Safieddin SafavinaeiniAbstract:A high Radiation Efficiency on-chip antenna is presented in a low-resistivity silicon technology. The proposed antenna configuration consists of a high-permittivity rectangular dielectric resonator excited by an H-slot antenna implemented in a silicon integrated circuit process. Using the Wheeler method an Efficiency of 48% has been measured for the integrated antenna at 35 GHz. The maximum size of this low profile antenna (h = 0.5 mm) is close to λ0/5 (considering the dielectric resonator), and its Radiation gain is around 1 dBi at 35 GHz. Moreover, the bandwidth of this antenna is 4.15 GHz (12%). Simulations and measurements show that by removing the passivation layer on top of the H-slot aperture the Radiation Efficiency increases by 10%.
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low cost planar waveguide technology based dielectric resonator antenna dra for millimeter wave applications analysis design and fabrication
IEEE Transactions on Antennas and Propagation, 2010Co-Authors: Wael Abdel M Wahab, Dan Busuioc, Safieddin SafavinaeiniAbstract:A compact, low cost and high Radiation Efficiency antenna structure, planar waveguide, substrate integrated waveguide (SIW), dielectric resonator antennas (DRA) is presented in this paper. Since SIW is a high Q- waveguide and DRA is a low loss radiator, then SIW-DRA forms an excellent antenna system with high Radiation Efficiency at millimeter-waveband, where the conductor loss dominates. The impact of different antenna parameters on the antenna performance is studied. Experimental data for SIW-DRA, based on two different slot orientations, at millimeter-wave band are introduced and compared to the simulated HFSS results to validate our proposed antenna model. A good agreement is obtained. The measured gain for SIW-DRA single element showed a broadside gain of 5.51 dB,-19 dB maximum cross polarized Radiation level, and overall calculated (simulated using HFSS) Radiation Efficiency of greater than 95%.
Thomas F Eibert - One of the best experts on this subject based on the ideXlab platform.
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Radiation efficient unidirectional low profile slot antenna elements for x band application
IEEE Transactions on Antennas and Propagation, 2005Co-Authors: C Locker, Thomas Vaupel, Thomas F EibertAbstract:Slot apertures in metallic ground planes are very attractive candidates for conformal antenna applications. However, a low-profile unidirectional antenna requires a backreflector close to the slot aperture and the resulting stripline feed causes strong excitation of parallel-plate modes. In this paper, we investigate unidirectional reflector-backed slot configurations with parallel-plate mode suppression by shorting pins. Starting from a parametric study with respect to shorting pin location and backreflector distance, we present a stripline-fed rectangular slot element with Radiation Efficiency of more than 80%, a bandwidth of about 5% at a center frequency of 10 GHz. For increased bandwidth applications, a bow-tie slot element with about 8% bandwidth and Radiation Efficiency of close to 80% is proposed.
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Radiation efficient unidirectional low profile slot antenna elements for x band application
Advances in Radio Science, 2005Co-Authors: C Locker, Thomas Vaupel, Thomas F EibertAbstract:Abstract. Slots in metallic ground planes are very promising candidates for conformal antenna applications. However, a low-profile unidirectional antenna requires a back reflector close to the slot and the resulting stripline feed causes strong excitation of parallel-plate modes. In this contribution, we consider unidirectional reflector-backed slot configurations with parallel-plate mode suppression by shorting pins. Starting from a parametric study with respect to shorting pin location and back reflector distance, we present a stripline-fed rectangular slot element with Radiation Efficiency of more than 80% and a bandwidth of about 5% at centre frequency 10GHz. A careful optimisation of shorting pin locations guarantees reliable parallel-plate mode suppression without deteriorating the slot Radiation behaviour. Coupling coefficients between parallel and aligned rectangular slot elements are presented. For increased bandwidth applications, a bow-tie slot element with about 8% bandwidth and Radiation Efficiency of close to 80% is proposed.
Yongzhong Xiong - One of the best experts on this subject based on the ideXlab platform.
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340 ghz siw cavity backed magnetic rectangular slot loop antennas and arrays in silicon technology
IEEE Transactions on Antennas and Propagation, 2015Co-Authors: Xiaodong Deng, Yongzhong XiongAbstract:A 340-GHz on-chip antenna (OCA) with high-gain and high-Radiation Efficiency is designed using a standard ${0}.{13}\hbox{-}\upmu {\rm m}$ SiGe BiCMOS technology without any postprocesses. In the proposed OCA structure, a rectangular slot loop is etched in the upper wall of a substrate integrated waveguide (SIW) to form a magnetic current loop radiator. The SIW structure forms a back cavity to suppress the surface waves and separate the Radiation aperture from the low-resistivity substrate. Furthermore, the side wall of the SIW cavity and the edge of the slot form a ${{{\lambda }}_{{g}}}/4$ resonator to reflect the power back to the slot loop. As a result, the Radiation Efficiency is improved. By etching a slot properly in the SIW upper wall, another resonating point is constructed and hence, the bandwidth is broadened. Single antenna element and a ${2} \times {2}$ array are both designed and fabricated with- and without- the slot structure; a maximum gain of 7.9 dBi with the Radiation Efficiency of 48% at 340 GHz is achieved for the proposed SIW cavity-backed antenna structure.
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340 ghz on chip 3 d antenna with 10 dbi gain and 80 Radiation Efficiency
IEEE Transactions on Terahertz Science and Technology, 2015Co-Authors: Xiaodong Deng, Chao Liu, Yongzhong XiongAbstract:This paper discusses the design methodologies of a 340 GHz on-chip 3-D antenna. Firstly, a high-gain and high-Radiation Efficiency substrate integrated waveguide (SIW) cavity backed on-chip antenna is designed using a standard 0.13- $\mu{\hbox{m}}$ SiGe BiCMOS technology. Then, a low-permittivity supporter and a dielectric resonator (DR) are vertically stacked on the proposed on-chip antenna, forming a 3-D Yagi-like antenna to further enhance the gain and Radiation Efficiency. The measurements showed that the proposed antenna achieved a peak gain of ${\sim}$ 10 dBi and Radiation Efficiency of ${\sim}$ 80% at 340 GHz; the impedance bandwidth is ${\sim}$ 12% with the use of dielectric resonator antenna (DRA) and the Yagi-like structure. The antenna size is ${\sim} {\hbox{0.7}}\times {\hbox{0.7}}\ {\hbox{mm}}^{2}$ .
Dan Busuioc - One of the best experts on this subject based on the ideXlab platform.
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millimeter wave high Radiation Efficiency planar waveguide series fed dielectric resonator antenna dra array analysis design and measurements
IEEE Transactions on Antennas and Propagation, 2011Co-Authors: Wael M Abdelwahab, Dan Busuioc, Safieddin SafavinaeiniAbstract:A low cost general architecture for a substrate integrated waveguide (SIW) series-fed dielectric resonator antenna (DRA) array, formed by two different slot polarizations, is proposed. In addition, a novel, simple, and generic transmission line (T.L.) circuit model, along with a fast and generic formulation for the new linear array antenna, is developed. The model can be used for reflection coefficient and Radiation pattern (gain) calculations. The experimental data from two linear array modules, operating at the millimeter-wave band, are used to verify the simulated results of HFSS and the proposed model results. The measured Radiation pattern for a 4 t 1 SIW-DRA array demonstrates a broadside beam with a radiated gain of 11.70 dB over an operating impedance bandwidth of 4.70%. Moreover, the simulated Radiation Efficiency is more than 90%.
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low cost planar waveguide technology based dielectric resonator antenna dra for millimeter wave applications analysis design and fabrication
IEEE Transactions on Antennas and Propagation, 2010Co-Authors: Wael Abdel M Wahab, Dan Busuioc, Safieddin SafavinaeiniAbstract:A compact, low cost and high Radiation Efficiency antenna structure, planar waveguide, substrate integrated waveguide (SIW), dielectric resonator antennas (DRA) is presented in this paper. Since SIW is a high Q- waveguide and DRA is a low loss radiator, then SIW-DRA forms an excellent antenna system with high Radiation Efficiency at millimeter-waveband, where the conductor loss dominates. The impact of different antenna parameters on the antenna performance is studied. Experimental data for SIW-DRA, based on two different slot orientations, at millimeter-wave band are introduced and compared to the simulated HFSS results to validate our proposed antenna model. A good agreement is obtained. The measured gain for SIW-DRA single element showed a broadside gain of 5.51 dB,-19 dB maximum cross polarized Radiation level, and overall calculated (simulated using HFSS) Radiation Efficiency of greater than 95%.
C Locker - One of the best experts on this subject based on the ideXlab platform.
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Radiation efficient unidirectional low profile slot antenna elements for x band application
IEEE Transactions on Antennas and Propagation, 2005Co-Authors: C Locker, Thomas Vaupel, Thomas F EibertAbstract:Slot apertures in metallic ground planes are very attractive candidates for conformal antenna applications. However, a low-profile unidirectional antenna requires a backreflector close to the slot aperture and the resulting stripline feed causes strong excitation of parallel-plate modes. In this paper, we investigate unidirectional reflector-backed slot configurations with parallel-plate mode suppression by shorting pins. Starting from a parametric study with respect to shorting pin location and backreflector distance, we present a stripline-fed rectangular slot element with Radiation Efficiency of more than 80%, a bandwidth of about 5% at a center frequency of 10 GHz. For increased bandwidth applications, a bow-tie slot element with about 8% bandwidth and Radiation Efficiency of close to 80% is proposed.
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Radiation efficient unidirectional low profile slot antenna elements for x band application
Advances in Radio Science, 2005Co-Authors: C Locker, Thomas Vaupel, Thomas F EibertAbstract:Abstract. Slots in metallic ground planes are very promising candidates for conformal antenna applications. However, a low-profile unidirectional antenna requires a back reflector close to the slot and the resulting stripline feed causes strong excitation of parallel-plate modes. In this contribution, we consider unidirectional reflector-backed slot configurations with parallel-plate mode suppression by shorting pins. Starting from a parametric study with respect to shorting pin location and back reflector distance, we present a stripline-fed rectangular slot element with Radiation Efficiency of more than 80% and a bandwidth of about 5% at centre frequency 10GHz. A careful optimisation of shorting pin locations guarantees reliable parallel-plate mode suppression without deteriorating the slot Radiation behaviour. Coupling coefficients between parallel and aligned rectangular slot elements are presented. For increased bandwidth applications, a bow-tie slot element with about 8% bandwidth and Radiation Efficiency of close to 80% is proposed.