Results 301 to 310 of about 289,146 (351)
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Dual‐port dual‐polarized microstrip antenna
Microwave and Optical Technology Letters, 2002AbstractExperimental and simulated results for a dual‐port dual‐polarized microstrip antenna are presented. The antenna excites two orthogonally polarized resonant frequencies providing an isolation of ∼30 dB between the ports. The patch geometry consists of two circular arcs of different radii with their centers displaced by a distance.
Sona O. Kundukulam +3 more
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Dual polarized dual‐band MIMO antenna
Microwave and Optical Technology Letters, 2016ABSTRACTFor multiple‐input‐multiple‐output (MIMO) system a dual‐band dual‐polarized antenna is presented. The antenna which is presented in this thesis produces a linearly polarized and circularly polarized radiation fields. The measured return losses of −18.89 and −21.86 dB are achieved at 2.43 GHz and 3.22 GHz, respectively.
Rekha Sharma, Usha Kiran Kommuri
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Dual-band dual-polarization antenna array
2014 International Symposium on Antennas and Propagation Conference Proceedings, 2014This paper is proposed a dual-band dual-polarization antenna array. This antenna is combined by one 2 × 2 dual-polarization patch antenna array and two 1 × 4 dipole antenna arrays operated in ISM 2.4-Ghz/5.2-GHz band. For the purpose to achieve dual band operation, the microstrip line diplexer is applied to combine two antenna operated in 2.4-GHz and 5.
Chia-Hsien Wei +2 more
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1982
This paper presents a new fiber optic gyro configuration that is designed to provide independence from the principal bias errors due to the phase modulator. The configuration operates with optimum Π/2 phase shift for gyro sensitivity, 2x increase in scale factor and has been experimentally shown to provide a lOx improvement in immunity to modulator ...
J. G. Hanse, G. L. Mitchell, P. E. Bjork
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This paper presents a new fiber optic gyro configuration that is designed to provide independence from the principal bias errors due to the phase modulator. The configuration operates with optimum Π/2 phase shift for gyro sensitivity, 2x increase in scale factor and has been experimentally shown to provide a lOx improvement in immunity to modulator ...
J. G. Hanse, G. L. Mitchell, P. E. Bjork
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A novel circularly polarized / dual band dual polarized antenna using metasurface
2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2015In this paper a novel circular polarized/dual band dual polarized antenna has been proposed, which is validated experimentally using the meta-surface. First a 450 rotated rectangular loop based meta-surface is excited with a patch radiator to obtain the dual band dual polarized operation.
B. Majumder +3 more
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Enhanced dual polarization directional coupler for dual polarization beam forming networks
2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017), 2002Directional couplers and fixed phase shifters are the key components for the realization of beam forming networks. Usually a beam forming network feeds the antenna with two linear and orthogonal polarizations. Dual polarization components can be used to reduce complexity and size of a beam forming network.
F. Alessandri +3 more
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2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium), 2020
Aiming to introduce a new guiding structure, this work presents dually polarized gap waveguide (DPGWG) operating in transverse electromagnetic (TEM) mode. To show the proof of concept, two waveports are connected at the ends of waveguide and transmission (for both horizontal and vertical polarization) is observed.
Riddhi Goswami, Ahmed Kishk
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Aiming to introduce a new guiding structure, this work presents dually polarized gap waveguide (DPGWG) operating in transverse electromagnetic (TEM) mode. To show the proof of concept, two waveports are connected at the ends of waveguide and transmission (for both horizontal and vertical polarization) is observed.
Riddhi Goswami, Ahmed Kishk
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A Circularly Polarized Dual-Band Microstrip Antenna
IEEE/ACES International Conference on Wireless Communications and Applied Computational Electromagnetics, 2005., 2005In this paper, we present a dual-band CP patch antenna based on the branch-line coupler feeding technique. The compactness of the dual-band antenna is obtained by inserting a small high-frequency patch into a large low-frequency one. Both patches are printed on the same upper substrate and electromagnetically fed through two perpendicular slots etched ...
Luxey, Cyril +3 more
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2016
In this chapter, we study dual polar spaces. These are certain point-line geometries that are closely related to polar spaces. We study several properties of these geometries and describe several families. Dual polar spaces are examples of near polygons.
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In this chapter, we study dual polar spaces. These are certain point-line geometries that are closely related to polar spaces. We study several properties of these geometries and describe several families. Dual polar spaces are examples of near polygons.
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2006 IEEE International Symposium on Geoscience and Remote Sensing, 2006
The CHILL radar was originally designed as dual polarization radar. It was put into operation in late 1971. The original concept was a dual frequency X-band and S-band system. In 1972, the idea of using it as polarization radar was suggested by Drs. Tom Seliga and Viswanathan Bringi.
E. Mueller, D. Brunkow
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The CHILL radar was originally designed as dual polarization radar. It was put into operation in late 1971. The original concept was a dual frequency X-band and S-band system. In 1972, the idea of using it as polarization radar was suggested by Drs. Tom Seliga and Viswanathan Bringi.
E. Mueller, D. Brunkow
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