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A dual-band multi-polarization common-aperture waveguide slot antenna

A waveguide slot antenna, vertically polarized antenna technology, applied in slot antennas, antennas, devices that make antennas work in different bands at the same time, etc., can solve the problems of low isolation, low antenna efficiency, and high cross-polarization, and achieve power The effect of large capacity, low cross polarization and high polarization isolation

Active Publication Date: 2017-06-30
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, these dual-band multi-polarization antennas mentioned above basically use microstrip patch antennas. The disadvantages of microstrip patch antennas are high cross-polarization, low isolation between different polarizations, and low antenna efficiency. question

Method used

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  • A dual-band multi-polarization common-aperture waveguide slot antenna
  • A dual-band multi-polarization common-aperture waveguide slot antenna
  • A dual-band multi-polarization common-aperture waveguide slot antenna

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Embodiment 1

[0044] see figure 1 , figure 2 , image 3 , a dual-band multi-polarized co-aperture waveguide slot antenna includes L-band vertically polarized antennas, C-band vertically polarized antennas, and C-band horizontally polarized antennas with equal lengths; the C-band vertically polarized antenna is C-band vertically polarized Waveguide slot antenna; C-band horizontally polarized antenna is a C-band horizontally polarized waveguide slot antenna.

[0045] see Image 6 , the L-band vertically polarized antenna consists of a double-ridged waveguide 1 with a first broadside radiation longitudinal slot and a first coaxial connector 7; the two ridges of the double-ridged waveguide 1 are located on both sides of the centerline of the waveguide, and The distances between the center lines are equal; the top of the double-ridge waveguide 1 is evenly distributed with four first broadside radial longitudinal slots 4, and the first coaxial connector 7 is installed at the bottom center of ...

Embodiment 2

[0060] see figure 1 , Image 6 , Figure 10 , a dual-band multi-polarization co-aperture antenna array working in L-band and C-band. The L-band antenna consists of a waveguide slot antenna line array with 1×4 elements. The C-band dual-polarized antenna consists of a waveguide slot antenna array with 4×16 elements, and the antenna array is composed of four C-band waveguide slot linear arrays. Each unit line array consists of 16 slots. The waveguide of the L-band antenna is located below the waveguide of the C-band dual-polarized antenna. In this embodiment, the spacing of the L-band antenna slots is L1=0.5 Such as Image 6 shown. The element spacing between C-band vertically polarized antenna arrays Ld2=0.7 Such as Image 6 As shown, the element spacing Ld3=0.7 between the C-band horizontally polarized antenna arrays Such as Figure 10As shown, this sub-array is connected with T / R components, supplemented by power supply, wave control and installation structural p...

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Abstract

The invention relates to a dual-band multi-polarization common-aperture waveguide slot antenna. Including L-band vertically polarized antennas, C-band vertically polarized antennas and C-band horizontally polarized antennas with equal lengths; and all of them are waveguide slot antennas; C-band vertically polarized antennas and C-band horizontally polarized antennas form a C-band dipole The polarized antenna array is located at the upper part, and the L-band vertically polarized antenna is located at the lower part; the L-band vertically polarized antenna, the C-band vertically polarized antenna and the C-band horizontally polarized antenna are all fed through the center of the antenna waveguide through a coaxial connector. Electrically, the coaxial connector and the waveguide form a 3dB power divider; realize the excitation of the L-band vertically polarized antenna, the C-band vertically polarized antenna and the C-band horizontally polarized antenna. The invention realizes sharing of multiple waveguide slot antennas on the same physical aperture area. Compared with the dual-band multi-polarization microstrip common-aperture antenna, the antenna has high efficiency, high polarization isolation, low cross polarization, and low power capacity. Great advantages.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a dual-band multi-polarization common-aperture antenna, in particular to a dual-frequency band multi-polarization common-aperture antenna composed of three metal radiation waveguides. The invention can be used for both reception and transmission of radio waves. In military terms, it can be used as a terminal antenna for phased array radar systems. In civilian use, it can be used as a spaceborne radar antenna, weather radar antenna, etc. Background technique [0002] With the rapid development of applications and demands, on the one hand, there are more and more electronic devices working at various frequencies; , Efficiency and other electrical performance indicators have put forward more and more stringent requirements, especially in the radar system, the antenna occupies a large proportion, so it is necessary to reduce the weight, compress the profile, improve the antenna ef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q13/10H01Q5/10
Inventor 陈明汪伟鲁加国张洪涛金谋平
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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