Design of millimeter wave near-field focused array antenna

Bai, Jiajun; D., L.; Chen, Q.; Zhang, G. F.; Fu, Yunqi

doi:10.1109/icmmt.2016.7762403

Cited by 2 publications

(4 citation statements)

References 7 publications

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“…where x i and y i are the coordinate of the i th element, z f is focal distance, and k = 2π/λ . It simplifies the antenna model and is applied extensively . The other method is based on maximum power transmission efficiency principle, which can be discussed earlier .…”

Section: Excitation Methodsmentioning

confidence: 99%

“…It simplifies the antenna model and is applied extensively. [3][4][5][6][7][8][9] The other method is based on maximum power transmission efficiency principle, which can be discussed earlier. 11,12 It arranges the excitation distribution by maximizing the power transmission efficiency T array between an antenna array and a testing antenna.…”

Section: Excitation Methodsmentioning

confidence: 99%

“…Design criteria for NFF antenna has been addressed in earlier study . Many NFF antennas have been proposed these years …”

Section: Introductionmentioning

confidence: 99%

“…3 Many NFF antennas have been proposed these years. [4][5][6][7][8][9][10] CP antenna can be used to reduce the disturbance of cloud and rain on radar systems, avoid polarization mismatch, and mitigate the multipath interference. 9 Due to diverse applications, much effort has been put on the CP antenna arrays and most of the works have been concentrated on expanding the axial ratio (AR) bandwidth and increasing the gain, and there seems little effort on the designs of CP antenna arrays with focusing capabilities.…”

Section: Introductionmentioning

confidence: 99%

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An enhanced circular polarization near‐field focused antenna array by director patches

Huang

Wang

2018

Micro & Optical Tech Letters

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This paper presents an enhanced circular polarization (CP) near‐field focused (NFF) antenna array. There exist three advantages for the CP NFF antenna. First, this study provides an effective way to realize the CP and NFF simultaneously and do not need to design a specific patch shape for CP, which provides more freedom to change the patch shape for improving other performances. The effective way is arranging the element excitation according to maximum power transmission efficiency theory under the condition of a CP testing antenna. Second, the array element consists of a driven and director patches, and the director patches tilt the element beam from broadside direction to focal point, and then obviously enhance the electric field focusing gain. Third, the proposed array antenna achieves much less size of focal point by using much less element number than published papers. The curves for the impedance and axial ratio (AR) as function of frequency, focus width and depth are analyzed. The simulated and measured results basically agree.

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Section: Excitation Methodsmentioning

confidence: 99%