一种双频多极化共口径波导天线阵列

doi:10.19665/j.issn1001-2400.2022.02.004

Abstract

Abstract:

An efficient technique for realizing dual-band multi-polarized waveguide antenna array featuring in shared-aperture,low-profile,light-weight and high radiation efficiency is proposed.A rectangular cavity-backed slotted antenna is adopted to realize L-band vertical polarization,while the C-band horizontal and vertical polarization are realized by utilizing the ridged waveguide slotted antenna.The L-band antenna is located between two C-band vertical-polarized slotted waveguides and below a C-band horizontal-polarized waveguide.To achieve a more miniaturized volume of the shared-aperture antenna array,an efficient feeding design of a metal bridge is introduced into the L-band rectangular waveguide.In order to confirm the feasibility of the proposed design,an array prototype with 8×16 elements operating in the C-band and 2×2 elements operating in the L-band is fabricated and measured.Experimental results demonstrate that the proposed antenna array has a satisfactory impedance bandwidth of 12% in the L-band and that of 5.5% in the C-band with VSWR<2,and the antenna radiation efficiency of above 85% for both frequency bands.

Key words: cavity-backed antenna, dual-band antenna, multi-polarized antenna, shared-aperture antenna, waveguide slotted antenna

CLC Number:

TN959.1

LU Jiaguo,ZHANG Hongtao,WANG Wei,ZHANG Bing,YIN Yingzeng. Novel dual-band multi-polarized shared-aperture waveguide antenna array[J].Journal of Xidian University, 2022, 49(2): 29-35.

Figures/Tables 6

References 24

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参数	数值	参数	数值	参数	数值
M_w	154	C_VWw	14.7	L_Sl	145
M_l	736	C_VWh	13.1	L_BRl	356.5
M_h	52	C_VRw	8.2	L_BRh	7.5
C_dx	38.5	C_VRh	10.4	L_BRMl	42
C_dy	46	C_VSl	32.3	L_BRMh	4.5
C_HWw	12.6	L_Ww	16.2	L_BRFh	1.5
C_HWh	13	L_Wh	36.1	L_BRFl	26
C_HRw	2	L_Wl	356.5
C_HRh	10	L_dy	184

参考文献	频段/GHz	极化	带宽	交叉极化	隔离度	天线效率
[17]	30&35	水平极化&垂直极化	2.19%@30			43.05%@30
				-25 dB	40 dB
			1.96%@35			36.3%@35
[18]	Ku&Ka	垂直极化	1.96%@35			36.3%@35
			3.12%@Ku
				<-40 dB
			4.99%@Ka
[19]	L&X	水平极化&垂直极化	4.99%@Ka
			8.0%@L	-27 dB@L	30 dB@L	-2.0 dB@L
			4.0%@X	-33 dB@X	40 dB@X	-2.2 dB@X
[20]	L&C	水平极化&垂直极化	4.0%@X	-33 dB@X	40 dB@X	-2.2 dB@X
			11.36@L	-35 dB@L	34 dB@L	>86%@L
			4.0%@C	-30 dB@C	66 dB@C	>85%@C
笔者设计	L&C	水平极化&垂直极化	4.0%@C	-30 dB@C	66 dB@C	>85%@C
			12%@L	-36 dB@L	36 dB@L	>88%@L
			5.5%@C	-40 dB@C	66 dB@C	>85%@C

Novel dual-band multi-polarized shared-aperture waveguide antenna array

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