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Ultra-wideband phased array feed source with gradually changing period

A phased array and ultra-wideband technology, applied in the field of antennas, can solve the problems of affecting the efficiency of reflector antennas, difficult to achieve aperture field matching, and discontinuous field of view of multiple beams, reducing the number of units, enhancing rigidity, and maximizing Effect of cell spacing

Pending Publication Date: 2021-07-09
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional reflector antenna uses an open horn placed near the focus of the reflector as the feed source. However, the radiation beam shape of the horn antenna changes gradually with the frequency, and the change of the beam width will seriously affect the efficiency of the reflector antenna, thereby affecting the system performance. working bandwidth
The single feed is applied to the reflector antenna, which can only generate a single beam, which is inefficient in deep space exploration
Although the feed group can generate multiple beams, the horns at the edge of the feed group are in a defocused state, making it difficult to achieve better aperture field matching, and due to aperture limitations, the multi-beam field of view is discontinuous

Method used

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  • Ultra-wideband phased array feed source with gradually changing period
  • Ultra-wideband phased array feed source with gradually changing period
  • Ultra-wideband phased array feed source with gradually changing period

Examples

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Embodiment Construction

[0022] Such as figure 1 Shown is a schematic diagram of the structure of the phased array feed source, the feed source is an all-metal structure, the main body is composed of a multi-row Vivaldi antenna one-dimensional linear array 1, and each linear array 1 is integrally processed by CNC machine tools.

[0023] Such as figure 2 As shown, it is a wideband Vivaldi antenna unit 3 and a narrowband Vivaldi antenna unit 4 , and different numbers of units of two different widths are connected to form a linear array 1 .

[0024] Such as image 3 As shown, after each line array 1 is individually processed, it is inserted from the back of the metal floor 2, limited to Figure 4 In the floor opening 10 shown, it can be fixed by screws.

[0025] Such as image 3 As shown, the feed installation bracket 8 is fastened to the back of the metal floor 2 by long screws 9 . The mounting bracket 8 can be used for testing and installing the feed source after the threaded holes are opened.

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Abstract

The invention belongs to the technical field of antennas, and particularly relates to an ultra-wideband phased array feed source with a gradually changing period. A main body of the ultra-wideband phased array feed source is a Vivaldi array antenna, and the ultra-wideband phased array feed source is formed by arranging two Vivaldi antenna units with different unit widths and different bandwidths in a certain mode. The feed source arrangement reduces the number of units to the maximum extent, and the cost is reduced. Due to the ultra-wideband characteristic of the Vivaldi antenna array, the feed source can realize ultra-wideband work. The feed source adopts a dense array to sample a focal plane field so that the reflector antenna can realize higher aperture efficiency. The feed source can be used for a single-reflector antenna system or a double-reflector antenna system, and ultra-wideband high-efficiency work of the reflector antenna is achieved.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to an ultra-broadband phased array feed source with gradual changes in period. Background technique [0002] Phased array antennas have been widely used in communication and radar fields due to their flexible beam agility and multi-beam capabilities. However, due to the need for a large number of back-end transmitting and receiving components, they are always facing the pressure of high cost. With the increase of array gain required by application scenarios, it is inevitable to increase the array aperture, which is a physical limitation that is difficult to break through. Especially in deep space applications such as radio astronomy and satellite tracking, the required array aperture is huge. To construct a large array with a half-wavelength spacing of the operating frequency, the number of arrays will be tens of thousands. Therefore, in these fields, the most commonly used antenn...

Claims

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Application Information

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IPC IPC(8): H01Q21/24H01Q21/00H01Q15/14H01Q1/00H01Q13/02
CPCH01Q1/002H01Q13/02H01Q15/14H01Q21/0006H01Q21/24
Inventor 梁修业曾建平张喆黄浩关放刘晓晗资剑
Owner FUDAN UNIV
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