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Miniature embedded multi-band antennas for portable devices
IWAT 2005. IEEE International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, 2005., 2005In this paper, we mainly review our recent research progress on developing miniaturized embedded multi-band antennas for portable devices. First a simple measurement setup for measuring small antennas is presented. Then, several new multi-band antennas are demonstrated numerically and experimentally.
Y.X. Guo +3 more
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Multi-band terahertz active device with complementary metamaterial
Journal of Applied Physics, 2015We describe a multi-band terahertz-active device using a composite structure made of complementary metamaterial and doped silicon that can be dynamically controlled. This special complementary metamaterial exhibits three resonances that produce three pass-bands.
Shen Qiao +7 more
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Simulation of Hot-Electron Effects with Multi-band Semiconductor Devices
2018 International Conference on Simulation of Semiconductor Processes and Devices (SISPAD), 2018In this work, we present a 2-Valley energy band model of electron transport that delivers more accurate solutions compared with the Farahmand model but with improved convergence and a faster solution time for very high electric fields. This was achieved by implementing the Fermi-Dirac integral distribution as a substitution for the Boltzmann ...
Lars P. Tatum +2 more
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A High Efficiency Multi-Band Antenna for Mobile Communication Devices
Applied Mechanics and Materials, 2013In this paper, we present a compact high-efficiency multi-band micro strip antenna for the mobile devices. At the same time, because most of antennas are located near the ground planar, the proposed antenna is designed with a ground planar. The antenna occupies a small size of 100*60mm2 and operates in CDMA(824-894MHz),GSM(880-960MHz), DCS(1710-1880 ...
Sheng Cai Jiao, Wen Zhou Sun
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A SAR test procedure for wireless devices with simultaneous multi-band transmission
IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450), 2004In this paper a procedure for SAR (specific absorption rate) testing of wireless devices with simultaneous transmission in multiple bands is presented. The approach of this test procedure is to measure SAR for the transmitters in the device separately, add the measured SAR distributions and then finally calculate the 1 g and 10 g mass averaged SAR from
M. Siegbahn, C. Tornevik
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AEU - International Journal of Electronics and Communications, 2020
Abstract A miniaturized frequency reconfigurable CPW-fed antenna operating in the UWB, ISM, WiMAX, WLAN, Wi-Fi, C-band and 5G sub-6 GHz frequency bands is proposed here. The wideband CPW-fed triangular patch is made tunable to three triple-frequency bands on demand by connecting it to different serpentine stubs by using PIN diodes. The combination of
Wahaj Abbas Awan +6 more
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Abstract A miniaturized frequency reconfigurable CPW-fed antenna operating in the UWB, ISM, WiMAX, WLAN, Wi-Fi, C-band and 5G sub-6 GHz frequency bands is proposed here. The wideband CPW-fed triangular patch is made tunable to three triple-frequency bands on demand by connecting it to different serpentine stubs by using PIN diodes. The combination of
Wahaj Abbas Awan +6 more
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Multi-band simulation of quantum transport in resonant interband tunneling devices
Physica E: Low-dimensional Systems and Nanostructures, 2000Abstract We have analyzed quantum transport in InAs/AlSb/GaSb/AlSb/InAs (type II) double-barrier resonant interband tunneling diodes. Our procedure uses a tight-binding non-equilibrium Green's function method where an evanescent wave matching at heterointerfaces as well as a realistic band structure, i.e., the conduction-valence-band-mixing effects ...
Matsuto Ogawa +2 more
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A multi-band antenna for potential 700 MHz handheld device applications
2009 IEEE Antennas and Propagation Society International Symposium, 2009This paper presents a single feed small size multi-frequency band antenna. The antenna is composed of several folded conducting strips and an L-shaped ground plane. Simulated and measured results show that in addition to a lower frequency band for 700 MHz band wireless applications, the antenna can operate at higher frequency bands of GSM/800/900/1800 ...
Qinjiang Rao, Shirook Ali, Dong Wang
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International Journal of Sensor Networks, 2014
This paper analyses the optimal user and mode proportion allocation for cellular and device-to-device (D2D) heterogeneous networks (HetNets) on multi-bands. The D2D user can reuse the uplink resource of the cellular system. With the help of the stochastic geometry, we model the HetNets by homogeneous Poisson point process (HPPP) and get a system ...
Yang Yang 0007 +3 more
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This paper analyses the optimal user and mode proportion allocation for cellular and device-to-device (D2D) heterogeneous networks (HetNets) on multi-bands. The D2D user can reuse the uplink resource of the cellular system. With the help of the stochastic geometry, we model the HetNets by homogeneous Poisson point process (HPPP) and get a system ...
Yang Yang 0007 +3 more
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A multi-band loop antenna with a band stop filter for wireless handheld devices
2017 IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications (APWC), 2017A multi-band loop antenna with a band stop filter is proposed for the application of mobile communications devices. The antenna is compact in comparison with conventional mobile antennas as only one resonator is used to realize multi-resonance operation.
H. Y. Wang, H. Zhou
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