Results 251 to 260 of about 286,161 (299)

Dual‐band, dual‐polarized patch antennas

International Journal of Microwave and Millimeter-Wave Computer-Aided Engineering, 1995
AbstractTwo new configurations of patch antennas are introduced, which provide dual‐band and dual‐polarization operations. The two patches have a square and cross shape, and are printed on a single layer; the dual‐frequency and the dual‐polarization behavior is obtained by means of four narrow slots close to the edges.
Peter Piazzesi, Stefano Maci, Guido Biffi Gentili   +2 more
openaire   +3 more sources

Triangular Ring Antennas for Dual-Frequency Dual-Polarization or Circular-Polarization Operations

IEEE Antennas and Wireless Propagation Letters, 2014
In this letter, triangular ring (TRG) antennas are proposed for dual-frequency dual-polarization (DFDP) and circular-polarization (CP) operations. By simultaneously exciting the two orthogonal modes of the TRG, the DFDP or CP performance is achieved. By varying the vertex angle of the TRG, the frequency ratio (FR) of the two orthogonal modes could be ...
null Tao Zhang, null Yan Zhang, null Wei Hong, null Ke Wu   +3 more
openaire   +1 more source

Dual-band dual-polarization microstrip antenna

IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313), 2003
The analysis of a single patch microstrip antenna based on the impedance model, emphasizing mainly the design considerations for dual-band and dual-polarization, is presented here. A length compensation technique is proposed to achieve the exact dual mode resonance with the desired accuracy.
R. Kumar Vishwakarma, B.R. Vishvakarma
openaire   +1 more source

Dual-band dual polarization microstrip antenna

IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450), 2004
This paper describes the development of a multilayer dual-band dual-polarized antenna operating at L and C bands with a common aperture. Unlike earlier approaches, slot coupled patches are employed at both bands to reach cross-polarization suppression better than 30 dB.
A. Vallecchi, G.B. Gentili, M. Calamia
openaire   +1 more source

Dual‐port dual‐polarized microstrip antenna

Microwave and Optical Technology Letters, 2002
AbstractExperimental 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, Manju Paulson, C. K. Aanandan, P. Mohanan   +3 more
openaire   +1 more source

Dual polarized dual‐band MIMO antenna

Microwave and Optical Technology Letters, 2016
ABSTRACTFor 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
openaire   +1 more source

Dual-band dual-polarization antenna array

2014 International Symposium on Antennas and Propagation Conference Proceedings, 2014
This 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, Tzung-Wern Chiou, Chia-Jung Chuang   +2 more
openaire   +1 more source

Dual Polarization Gyro

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
openaire   +1 more source

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, 2015
In 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, K Kandasamy, J. Mukherjee, K.P. Ray   +3 more
openaire   +1 more source

Enhanced dual polarization directional coupler for dual polarization beam forming networks

2000 IEEE MTT-S International Microwave Symposium Digest (Cat. No.00CH37017), 2002
Directional 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, M. Dionigi, R. Ravanelli, L. Vanni   +3 more
openaire   +1 more source