Broadband Circularly Polarized Beam-Steering Antenna Array

Liu, Changrong; Xiao, Shaoqiu; Guo, Yong‐Xin; Bai, Yan-Ying; Wang, Bing‐Zhong

doi:10.1109/tap.2012.2230235

Cited by 57 publications

(32 citation statements)

References 22 publications

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“…It is observed from Figure 5(a) that the phase shifter exhibits an impedance bandwidth (|S 11 | ≤ −10 dB, |S 33 | ≤ −10 dB) and a low insertion loss bandwidth (insertion loss is less than 0.5 dB) around 66%, from 1.4 GHz to 2.8 GHz. Referring to The designed phase shifter in this paper obtain a better performance than that of the modal used in reference [5].…”

Section: Simulation and Experimentsmentioning

confidence: 87%

“…The design details and exact performance of the 45 • phase shifter are not given. This phase shifter is cited by [5] and exhibits an impedance bandwidth (|S 11 | < −10 dB) around 48% and a constant 45 • (±4 • ) phase difference over a frequency range of 24%. In this letter, Genetic Algorithm (GA) is applied to the optimization of the phase shifter proposed in [4] and a better performance of this type of phase shifter is obtained.…”

Section: Introductionmentioning

confidence: 99%

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Design of a Wideband Differential Phase Shifter With the Application of Genetic Algorithm

Wang¹,

Yang²,

Liu³

et al. 2014

PIER Letters

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Abstract-In this paper, a wideband differential phase shifter has been analyzed and designed using Genetic Algorithm (GA). The differential phase shifter consists of two fixed main lines of length λ/2, and parallel open and short stubs of length λ/8, which are shunted at the edge points of the main lines, respectively. With the application of GA, an impedance match and minimum phase deviation for the desired phase shift over a wide frequency band are obtained. In order to verify the optimum results, simulation experiments are made and a 45 • phase shifter is fabricated and measured. The phase shifter exhibits an impedance bandwidth (|S 11 | < −10 dB) and a consistent 45 • (±2 • ) phase difference bandwidth around 66%.

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Section: Simulation and Experimentsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Design of a Wideband Differential Phase Shifter With the Application of Genetic Algorithm

Wang¹,

Yang²,

Liu³

et al. 2014

PIER Letters

View full text Add to dashboard Cite

show abstract

“…Polarization has significant impact in operation of communication systems so that polarization mismatch can decline the signal more than 20 dB in a linearly polarized system. Polarization inconformity and the effect of multi-pass reflections that leads to remodel left handed circular polarization (LHCP) to right handed circular polarization (RHCP) and vice versa, is not an issue if both of receiver and transmitter antennas are CP [4][5][6][7]. Planner microstrip CP antennas with low profile and ease of realization features, are suitable in wireless systems.…”

Section: Introductionmentioning

confidence: 99%

“…The antenna is improved very well, compared with other previously reported papers [4][5][6], i.e., the AR and impedance bandwidths are wider than previous works. The final design of realized array has the smallest dimensions among the previous published works [7][8][9][10][11]. The prototype of phased antenna array is fabricated and measured to verify simulation results.…”

Section: Introductionmentioning

confidence: 99%

Broadband Circularly Polarized 2 × 2 Antenna Array with Sequentially Rotated Feed Network for C-Band Application

Sedgeechongaralouye-Yekan

Naser‐Moghadasi

Sadeghzadeh

2016

Wireless Pers Commun

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In this paper, a unique broad-band circularly polarized antenna array with sequentially rotated feed-network for C-band applications is proposed. In order to, implement presented array element, a novel and miniaturized square slot antenna, with one pair of attached L-shaped and a T-shaped strips at ground surface, for decreasing cross polarization purity, is presented. Two L-shaped strips with different length are inserted at slot antenna's patch to enhance impedance matching. The symmetric coplanar waveguide is used for feeding the slot element. The antenna element obtains a 3 dB axial ratio bandwidth from 5.85 to 6.25 GHz. For further improving of radiation attributes, elements in 2 9 2 array are linked together by sequentially rotated feed to achieve wider axial ratio and impedance matching bandwidths. The main advantage of feed network is designed in a way that to have less coupling effect between elements. The axial ratio (AR) and impedance bandwidths of array is from 4.9 to 6.45 GHz (for AR \3 dB) and 4 to 8.1 GHz (for VSWR \2), respectively. Simulation and measurement results validated the proposed array design.

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“…Circularly polarized (CP) antennas are adopted to distinguish the line-of-sight signal from other reflected signals with opposite polarization [5]- [7]. To produce CP radiation, a simple antenna structure with asymmetrical Y-shaped feeding line was studied in [8] and [9], in which the axial-ratio (AR) bandwidths are only about 0.9% and 4%, respectively.…”

Section: Introductionmentioning

confidence: 99%

A Novel Bidirectional Antenna With Broadband Circularly Polarized Radiation in X-Band

Shen

Lü

Cao

et al. 2014

Antennas Wirel. Propag. Lett.

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A novel bidirectional antenna with a broadband circular polarization (CP) property in X-band is proposed. The CP characteristics are simply achieved by the asymmetrical Y-shaped feeding line. Both the impedance bandwidth and the axial-ratio (AR) bandwidth can be greatly improved by a through-via that is in series with an inductive strip and the polygon slot structure. The antenna is fabricated and measured for verifying the theory. A good agreement is achieved between the simulated and measured results. The 10-dB return-loss bandwidth is 31.4%, in which the AR is less than 2 dB. The measured radiation pattern shows a near-symmetry bidirectional radiation with the peak gain of 4.6 dBi. This antenna is a good candidate as a unit element in beamforming array applications.

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Broadband Circularly Polarized Beam-Steering Antenna Array

Cited by 57 publications

References 22 publications

Design of a Wideband Differential Phase Shifter With the Application of Genetic Algorithm

Design of a Wideband Differential Phase Shifter With the Application of Genetic Algorithm

Broadband Circularly Polarized 2 × 2 Antenna Array with Sequentially Rotated Feed Network for C-Band Application

A Novel Bidirectional Antenna With Broadband Circularly Polarized Radiation in X-Band

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