一种应用于5G移动通信的小型宽带三极化天线

doi:10.16180/j.cnki.issn1007-7820.2023.12.005

Abstract

Abstract:

A miniaturized broadband tri-polarized antenna for 5G mobile communication is proposed in this study. A pair of hollow annular orthogonal dipoles is adopted as the horizontal dual polarization of the antenna, meanwhile a planar rectangular frame equivalent to a monopole is constructed as the vertical polarization of the antenna, which is fed by a microstrip integrated balun and the four-equivalent power dividing microstrip lines, respectively. The proper choice of the feeding method and the ingenious design of the pointed cone planar rectangular frame achieve the broadband characteristics of the antenna, and the integrated structure layout realizes the miniaturization of the antenna. The antenna structure is compact with a volume of 0.27 λ_min×0.27 λ_min×0.17 λ_min, where λ_min is the free space wavelength of the lowest frequency. To verify the design, the prototype antenna is manufactured and measured,and the measured results agree well with the simulation. The measurement results show that the antenna impedance bandwidth is 3.00~4.48 GHz(voltage standing wave ratio is less than 2), the relative bandwidth is 39.6%, and the isolation degree between the three ports is greater than 27 dB. In addition, in the entire frequency band, the horizontal polarization gain of the antenna is greater than 6 dB, the vertical polarization gain is greater than 3 dB, and the antenna has stable pattern characteristics and good orientation, indicating that the antenna has greater practical value in 5G small-pitch arrays and narrow spaces.

Key words: tri-polarization, miniaturization, broadband, all-in-one integration, equivalent monopole, distributed, microstrip integrated balun, 5G mobile communication

CLC Number:

TN92

HAN Guodong,FU Ming,CHEN Xi. A Miniaturized Broadband Tri-Polarized Antenna for 5G Mobile Communication[J].Electronic Science and Technology, 2023, 36(12): 32-38.

Figures/Tables 11

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Table 2.

References 18

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参数	数值/mm	参数	数值/mm	参数	数值/mm
bh₁	13.30	bl₂	8.25	sh₁	0.50
bh₂	9.30	bl₃	9.25	sh₂	13.00
bh₃	13.30	bl₄	9.00	sh₃	9.00
bh₄	14.30	bl₅	2.50	sh₄	5.50
bh₅	14.05	subl1	7.00	gndl₁	100.00
bx1	1.40	subl₂	31.00	gndl₂	36.00
bx₂	1.00	subh₁	17.55	dl	30.00
bl1	9.75	subh₂	15.30	vl	27.00

天线结构	高度 /λ_min	覆盖面积 /λ_min	重叠相对带宽/%	端口隔离度/dB
文献[6]	0.075	0.852×0.852	13.16	20.0
文献[14]	0.090	π×1.22²	14.00	31.0
文献[16]	0.090	π×1.76²	24.45	30.0
文献[17]	0.050	1.21×1.21	10.80	35.0
文献[18]	0.106	0.63×0.63	10.40	22.0
本文	0.170	0.27×0.27	39.60	27.0

A Miniaturized Broadband Tri-Polarized Antenna for 5G Mobile Communication

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