The Experts below are selected from a list of 11988 Experts worldwide ranked by ideXlab platform
Mehrbod Mohajer - One of the best experts on this subject based on the ideXlab platform.
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an integrated wide band circularly Polarized Antenna for millimeter wave applications
IEEE Transactions on Antennas and Propagation, 2014Co-Authors: Mohammad Fakharzadeh, Mehrbod MohajerAbstract:This communication describes the design, integration and measurement of a compact, wide-band, circularly Polarized Antenna for millimeter-wave short-range communication. The Antenna is comprised of a five-section square loop and a tapered feed line. This configuration is less sensitive to the fabrication issues compared to the conventional circular spiral Antennas. Two samples of this Antenna designed for 60 GHz are integrated in a 6 layer IC package. The measured impedance bandwidth of the Antenna-in-package is over 12 GHz. Moreover, this circularly Polarized Antenna provides over 7 GHz of axial ratio bandwidth. The measured peak gain is around 6 dBi. The compact-size and simple feed structure of the designed Antenna make it a low-cost solution for the integrated millimeter-wave radio packaging.
Mingjian Li - One of the best experts on this subject based on the ideXlab platform.
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a wideband circularly Polarized Antenna for microwave and millimeter wave applications
IEEE Transactions on Antennas and Propagation, 2014Co-Authors: Mingjian LiAbstract:A wideband circularly Polarized Antenna with a single feed is achieved by adjusting the shapes and dimensions of a linearly Polarized magneto-electric (ME) dipole Antenna. Experimentally, an Antenna prototype operating at around 2 GHz exhibits a wide impedance bandwidth of 73.3% for SWR ≤ 2 and 46.6% for SWR ≤ 1.5, a 3-dB axial ratio bandwidth of 47.7% and an Antenna gain of 6.8 ± 1.8 dBic. Based on the design operating at lower microwave frequencies, a millimeter-wave Antenna is designed on a dielectric substrate. The Antenna has a wide impedance bandwidth (SWR ≤ 2) of 56.7% covering 38.5 to 69 GHz and a 3-dB axial ratio bandwidth of 41% covering 45.8 to 69.4 GHz, over which the Antenna boresight gain varies from 5 to 9.9 dBic. This validates that the design can be realized on a single-layer printed circuit board.
Mohammad Fakharzadeh - One of the best experts on this subject based on the ideXlab platform.
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an integrated wide band circularly Polarized Antenna for millimeter wave applications
IEEE Transactions on Antennas and Propagation, 2014Co-Authors: Mohammad Fakharzadeh, Mehrbod MohajerAbstract:This communication describes the design, integration and measurement of a compact, wide-band, circularly Polarized Antenna for millimeter-wave short-range communication. The Antenna is comprised of a five-section square loop and a tapered feed line. This configuration is less sensitive to the fabrication issues compared to the conventional circular spiral Antennas. Two samples of this Antenna designed for 60 GHz are integrated in a 6 layer IC package. The measured impedance bandwidth of the Antenna-in-package is over 12 GHz. Moreover, this circularly Polarized Antenna provides over 7 GHz of axial ratio bandwidth. The measured peak gain is around 6 dBi. The compact-size and simple feed structure of the designed Antenna make it a low-cost solution for the integrated millimeter-wave radio packaging.
Adam Narbudowicz - One of the best experts on this subject based on the ideXlab platform.
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circularly Polarized Antenna with steerable dipole like radiation pattern
IEEE Transactions on Antennas and Propagation, 2014Co-Authors: Adam Narbudowicz, X L Bao, M J Ammann, Hammam Shakhtour, Dirk HeberlingAbstract:An omnidirectional circularly Polarized Antenna with a rotatable dipole-shaped radiation pattern is proposed. The Antenna is realized using a back-to-back coupled microstrip patch arrangement. The pattern is rotated by means of a phase shift, enabling reception (or transmission) of signals from all angles around a sphere. The method enables continuous pattern steering without the need for semiconductor or MEMS components integrated into the Antenna. It also allows the use of more than one radiation pattern simultaneously, potentially providing coverage for any spherical angle. The theory is supported by simulation and measurement of four typical Antenna configurations. The maximum gains are between 1.9 and 4 dBic and average axial-ratio varies between 2.5 and 3.65 dB at 2.47 GHz. The impedance bandwidth is from 2.4 to 2.51 GHz and the reconfigurable circular polarization is achieved from 2.464 to 2.484 GHz.
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dual band omnidirectional circularly Polarized Antenna
IEEE Transactions on Antennas and Propagation, 2013Co-Authors: Adam Narbudowicz, X L Bao, M J AmmannAbstract:A dual-band omnidirectional circularly Polarized Antenna is proposed. The Antenna comprises back-to-back microstrip patches fed by a coplanar waveguide. A very low frequency ratio of 1.182 has been achieved, which can be easily tuned by adjusting four lumped capacitors incorporated into the Antenna. An analysis of the omnidirectional circular polarization mechanism as well the dual band operation is provided and confirmed by numerical and experimental data. Key parameters to tune the resonant frequencies and the axial ratio have been identified. The prototype Antenna provides omnidirectional circular polarization in one plane with cross polar isolation better than 12 dB for both frequency bands.
M J Ammann - One of the best experts on this subject based on the ideXlab platform.
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circularly Polarized Antenna with steerable dipole like radiation pattern
IEEE Transactions on Antennas and Propagation, 2014Co-Authors: Adam Narbudowicz, X L Bao, M J Ammann, Hammam Shakhtour, Dirk HeberlingAbstract:An omnidirectional circularly Polarized Antenna with a rotatable dipole-shaped radiation pattern is proposed. The Antenna is realized using a back-to-back coupled microstrip patch arrangement. The pattern is rotated by means of a phase shift, enabling reception (or transmission) of signals from all angles around a sphere. The method enables continuous pattern steering without the need for semiconductor or MEMS components integrated into the Antenna. It also allows the use of more than one radiation pattern simultaneously, potentially providing coverage for any spherical angle. The theory is supported by simulation and measurement of four typical Antenna configurations. The maximum gains are between 1.9 and 4 dBic and average axial-ratio varies between 2.5 and 3.65 dB at 2.47 GHz. The impedance bandwidth is from 2.4 to 2.51 GHz and the reconfigurable circular polarization is achieved from 2.464 to 2.484 GHz.
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dual band omnidirectional circularly Polarized Antenna
IEEE Transactions on Antennas and Propagation, 2013Co-Authors: Adam Narbudowicz, X L Bao, M J AmmannAbstract:A dual-band omnidirectional circularly Polarized Antenna is proposed. The Antenna comprises back-to-back microstrip patches fed by a coplanar waveguide. A very low frequency ratio of 1.182 has been achieved, which can be easily tuned by adjusting four lumped capacitors incorporated into the Antenna. An analysis of the omnidirectional circular polarization mechanism as well the dual band operation is provided and confirmed by numerical and experimental data. Key parameters to tune the resonant frequencies and the axial ratio have been identified. The prototype Antenna provides omnidirectional circular polarization in one plane with cross polar isolation better than 12 dB for both frequency bands.
