Dual-Circularly Polarized Conical-Beam Microstrip Antenna

Bai, Xudong; Liang, Xianling; Li, Minzhu; Zhou, Bin; Geng, Junping; Jin, Ronghong

doi:10.1109/lawp.2014.2369515

Cited by 55 publications

(31 citation statements)

References 6 publications

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“…The metal ground plane is placed on the top surface of the third layer and fabricated with two apertures for the vias connection between the driven patch and the compact-size semi-lumped hybrid 90°coupler26 on the bottom surface of the third layer. The central angle of the two feeding point is 90° to excite the dual-CP operation, and this element structure is very similar to that shown in literature27; when one port is excited and the other terminated with a 50-Ω load, the LHCP or RHCP radiation will be generated correspondingly. The parameters of the hybrid coupler are set as follows: W = 1.4 mm, L x = 10.8 mm, L y = 10.3 mm, l x = 10.02 mm, l y = 10.1 mm, w x = 1.7 mm, w y = 2.3 mm.…”

Section: Resultsmentioning

confidence: 56%

Experimental Array for Generating Dual Circularly-Polarized Dual-Mode OAM Radio Beams

Bai

Liang

Sun³

et al. 2017

Sci Rep

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Recently, vortex beam carrying orbital angular momentum (OAM) for radio communications has attracted much attention for its potential of transmitting multiple signals simultaneously at the same frequency, which can be used to increase the channel capacity. However, most of the methods for getting multi-mode OAM radio beams are of complicated structure and very high cost. This paper provides an effective solution of generating dual circularly-polarized (CP) dual-mode OAM beams. The antenna consists of four dual-CP elements which are sequentially rotated 90 degrees in the clockwise direction. Different from all previous published research relating to OAM generation by phased arrays, the four elements are fed with the same phase for both left-hand circular polarization (LHCP) and right-hand circular polarization (RHCP). The dual-mode operation for OAM is achieved through the opposite phase differences generated for LHCP and RHCP, when the dual-CP elements are sequentially rotated in the clockwise direction. The measured results coincide well with the simulated ones, which verified the effectiveness of the proposed design.

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Section: Resultsmentioning

confidence: 56%

Experimental Array for Generating Dual Circularly-Polarized Dual-Mode OAM Radio Beams

Bai

Liang

Sun³

et al. 2017

Sci Rep

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“…The simulated results also show that the antenna array has a high radiation efficiency over 90% in the designated bands. Table I compares the proposed dual-sense CP antenna with other reported methods of achieving the dual-sense microstrip CP antennas in [11]- [12], [14] and [16]. This comparison mainly focuses on the realization method, antenna size, thickness, impedance bandwidth, AR bandwidth and isolation between the two ports/polarizations.…”

Section: A Dual-sense Cp Antenna Elementmentioning

confidence: 99%

“…This comparison mainly focuses on the realization method, antenna size, thickness, impedance bandwidth, AR bandwidth and isolation between the two ports/polarizations. Compared with the antennas in [11] and [12], the impedance, 3-dB AR bandwidths, and isolation are significantly increased. The antennas in [14] and [16] have the good bandwidths, but they suffer from large element dimension or poor port isolation.…”

Section: A Dual-sense Cp Antenna Elementmentioning

confidence: 99%

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Compact Broadband Dual-Sense Circularly Polarized Microstrip Antenna/Array With Enhanced Isolation

Mao

Gao

Wang

et al. 2017

IEEE Trans. Antennas Propagat.

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Abstract-This paper presents a novel method of designing the compact dual-sense circularly-polarized (CP) microstrip antenna/array with improved impedance bandwidth, axial ratio (AR) bandwidth and inter-polarization isolation. The left-hand and right-hand CP (LHCP/ RHCP) characteristics are achieved simultaneously by conceiving a vertically coupled resonant structure for the first time. Different from traditional methods, the antenna shows a compact size but exhibits the wide impedance and 3-dB AR bandwidths. For each input, two coupling paths are purposely designed to excite the TM10 and TM01-mode of the patch, respectively. By composing different coupling units in the two paths, an intrinsic ±90 o phase difference over a broadband can be obtained, resulting in the broadband CP characteristics. In addition, a novel method of using the neutralization line between the two feeds is investigated to improve the isolation between the polarizations. Based on the dual-sense CP element, a 1 × 4 dual-sense CP array is composed to exemplify its potential applications in large arrays. Compared with traditional CP antennas, the proposed antennas have the advantages of compact size, simplified feed, broad impedance and 3-dB AR bandwidths, and improved isolation. Experimental results verify the predictions.

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“…For the antenna proposed in reference [13], by introducing several inclined slits to the diagonal and sidewalls of the rectangular dielectric resonator (RDR) and also deducting a rectangular part of the top wall of the linearly polarized (LP) rectangular dielectric resonator antenna (RDRA), degeneracy modes are excited to generate the circularly polarized (CP) fields, while the bandwidth is narrow and the gain fluctuation in the omnidirectional plane is higher than 5 dB from the results of the radiation patterns, so it does not perform well in the omnidirectional character. Literature [14] reports a dual CP antenna which is excited at the second-order mode to generate the conical radiation pattern and is fed by a hybrid coupler to obtain the dual CP operation, but it realizes a conical beam instead of an omnidirectional coverage radiation pattern. There are only a few researches about omnidirectional dual CP antenna.…”

Section: Introductionmentioning

confidence: 99%

Omnidirectional Circularly Polarized Antenna with High Gain in Wide Bandwidth

Zhou¹,

Geng²,

Liang³

et al. 2017

Modern Antenna Systems

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A novel omnidirectional circularly polarized (CP) slot array antenna with high gain is proposed, which is based on the coaxial cylinder structure, and the orthogonal slots radiated the circular polarization wave around the cylinder. Further, the improved dual circularly polarized (CP) omnidirectional antenna based on slot array in coaxial cylinder structure is presented too, and two ports are assigned in its two side as left hand circularly polarized (LHCP) port and right hand circularly polarized (RHCP) port, respectively. The simulation and experiment results show their novelty and good performance of omnidirectional circular polarization with about 5 dBi gain in 5.2-5.9 GHz.

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Dual-Circularly Polarized Conical-Beam Microstrip Antenna

Cited by 55 publications

References 6 publications

Experimental Array for Generating Dual Circularly-Polarized Dual-Mode OAM Radio Beams

Experimental Array for Generating Dual Circularly-Polarized Dual-Mode OAM Radio Beams

Compact Broadband Dual-Sense Circularly Polarized Microstrip Antenna/Array With Enhanced Isolation

Omnidirectional Circularly Polarized Antenna with High Gain in Wide Bandwidth

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