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Waveguide slot array antenna with wide scanning characteristic

A technology of waveguide slots and array antennas, applied in the direction of antennas, antenna arrays, antenna grounding switch structures, etc., can solve the problems of antenna feed loss and antenna gain reduction, and achieve reduced active standing waves, good mechanical properties, and small size The effect of chemical mechanical properties

Pending Publication Date: 2022-07-12
SHANGHAI SPACEFLIGHT ELECTRONICS & COMM EQUIP RES INST
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AI Technical Summary

Problems solved by technology

[0005] Existing wide-scan antennas are mainly planar antennas or end-fire antennas in the form of microstrips, such as printed dipole antennas and gradient slot antennas. When used in the Ka frequency band, the feed loss of the antenna will reduce the gain of the antenna.

Method used

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  • Waveguide slot array antenna with wide scanning characteristic
  • Waveguide slot array antenna with wide scanning characteristic
  • Waveguide slot array antenna with wide scanning characteristic

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specific Embodiment

[0038] The embodiment of the present invention is a waveguide slot array antenna working in the ka-band, including 8 linear sub-arrays, and the center frequency is f 0 , the lower frequency is 0.993f 0 , the upper frequency is 1.007f 0 .

[0039] see figure 1 , the waveguide slot array antenna with wide scanning characteristics provided by the present invention includes a waveguide slot linear array 1, a feeding network 2 and a metal slot 3;

[0040] The linear array of waveguide slots includes a radiation waveguide cavity 11 , a radiation slot 10 and a radiation input port 12 from top to bottom; the radiation slot 10 is opened on the narrow side of the radiation waveguide cavity 11 and cut into the radiation waveguide cavity 11 The broadside of the cut-in depth is calculated from the input impedance of the waveguide. The radiation input port 12 is connected to the radiation waveguide cavity 11 .

[0041] The radiation slits 10 are alternately opened on the narrow sides o...

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Abstract

The invention provides a waveguide slot array antenna with a wide scanning characteristic. The waveguide slot array antenna comprises a waveguide slot linear array, a feed network and a groove, the waveguide slot linear array comprises a radiation waveguide cavity, a radiation slot and a radiation input port; the radiation slot is formed in the narrow side of the radiation waveguide cavity and is cut into the wide side of the radiation waveguide cavity, and the radiation input port is connected with the radiation waveguide cavity; the feed network comprises a feed output port, a waveguide power divider, a folded waveguide, a calibration output port and a feed input port; the waveguide power divider is connected with the folded waveguide, and the calibration port is communicated with the waveguide power divider through a gap in a common wall; the feed output port is connected with the radiation input port; and the grooves are positioned on two sides of the waveguide linear array. The antenna provided by the invention has good electrical properties of high gain and wide scanning, and good mechanical properties of low profile and miniaturization.

Description

technical field [0001] The present invention relates to the field of spaceborne antennas, in particular to a waveguide slot array antenna used in a Ka-band spaceborne SAR system, in particular to a compact waveguide slot array antenna with wide scanning characteristics. Background technique [0002] With the continuous development of science and technology, millimeter wave technology has been rapidly applied and developed in SAR imaging systems. Millimeter-wave SAR systems not only place higher requirements on the electrical properties of the antenna, such as high gain, high efficiency, and wide scanning, but also have higher requirements on the mechanical properties of the antenna, such as miniaturization and light weight. When designing the antenna subsystem, it is necessary to consider all the indicators of the antenna from a global perspective. The characteristics of wide scanning, high gain, and miniaturization of the antenna are of great significance for improving the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q13/08H01Q1/50H01Q1/36H01Q21/00
CPCH01Q13/08H01Q1/50H01Q1/36H01Q21/00
Inventor 叶声苏醒马岩冰张天乐欧阳尚荣
Owner SHANGHAI SPACEFLIGHT ELECTRONICS & COMM EQUIP RES INST
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