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Low-sidelobe antenna air strip line sum-difference power division network

A power division network and stripline technology, applied in the field of radar antenna feeders, can solve the problems of high attenuation of the power divider, insufficient power resistance, and difficulty in realizing the power division circuit, and achieve easy engineering implementation, low loss, and easy implementation. Effect

Inactive Publication Date: 2018-01-09
THE 724TH RES INST OF CHINA SHIPBUILDING IND
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  • Application Information

AI Technical Summary

Problems solved by technology

It mainly solves two problems. The first is that when the number of antenna elements is small, the Taylor amplitude distribution drops rapidly, and the problem that the power divider ci

Method used

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  • Low-sidelobe antenna air strip line sum-difference power division network
  • Low-sidelobe antenna air strip line sum-difference power division network
  • Low-sidelobe antenna air strip line sum-difference power division network

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Embodiment Construction

[0010] The invention relates to an air stripline and differential power dividing network of a low side lobe antenna. Embodiment is as follows (see accompanying drawing):

[0011] 1. See figure 1 , the low sidelobe antenna is composed of 10 antenna units, which are respectively connected by 2 identical 1-5 power splitters. After determining the antenna array aperture and unit spacing according to the index requirements, the normalization of each unit under the -30dB theoretical Taylor amplitude distribution The chemical power distribution ratio is shown in Table 1:

[0012] Table 1 Power distribution ratio of each unit in theoretical Taylor distribution

[0013] unit

1

2

3

4

5

normalized power ratio

1

0.77

0.46

0.19

0.08

[0014] When the number of antenna elements is small, the Taylor amplitude distribution decreases rapidly, and the power distribution between each element is relatively large. When designing the power dist...

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Abstract

The invention is a low-sidelobe antenna air strip line sum-difference power division network. The invention mainly aims to solve the problem that the loss of a micro-strip or dielectric strip line power division network is high, and when the number of units is small, the Taylor amplitude distribution edge drops fast and it is not easy to realize an air strip line. The invention belongs to the technical field of radar antenna feeders. The sum-difference power division network is composed of two one-into-five power division networks and two sum-difference devices. The power division networks arein the form of air strip line. An improved Taylor amplitude distribution design is adopted. A power division network unit circuit with impedance transform at the input end is adopted. The method canimprove the loss of the power division network. When the number of units is small, a low-sidelobe antenna can be implemented.

Description

technical field [0001] The invention belongs to the technical field of radar antenna feeder. Background technique [0002] An interrogating antenna usually consists of a sum-difference power division network and an antenna element, and the sum-difference power division network is a key component to achieve antenna performance. The sum and difference power division network can be selected in various forms according to actual needs. Although the commonly used microstrip line form is easy to process, it has a large loss. In the present invention, the form of air plate line is used to realize and differential power distribution network. Compared with the form of air strip line, the loss is small, the power resistance is high, the air medium is evenly distributed, and the phase control is easy; when the number of antenna elements is small, Taylor The amplitude distribution decreases rapidly. By improving the amplitude distribution and adopting the power division unit circuit wit...

Claims

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Application Information

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IPC IPC(8): H01Q23/00H01P1/387H04B7/0426
CPCY02D30/70
Inventor 常德杰石磊刘朋朋
Owner THE 724TH RES INST OF CHINA SHIPBUILDING IND
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