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A conical conformal phased array antenna with 360 DEG omni-directional scanning

A conical, omnidirectional technology, applied in the directions of antenna arrays, antennas, and antenna arrays that are individually powered, it can solve the problems of gain and axial ratio deterioration, and achieve the effect of compact structure and excellent indicators.

Inactive Publication Date: 2019-01-11
北京乾中源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a planar phased array antenna, the normal direction of the array is the direction of maximum gain. If it is necessary to realize ground-to-ground and ground-to-air ad hoc network communication at the same time, the antenna needs to have a high gain in the horizontal direction, and the ordinary planar phased array antenna has a large During angle scanning, various indicators such as gain and axial ratio are severely deteriorated

Method used

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  • A conical conformal phased array antenna with 360 DEG omni-directional scanning
  • A conical conformal phased array antenna with 360 DEG omni-directional scanning
  • A conical conformal phased array antenna with 360 DEG omni-directional scanning

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specific Embodiment approach

[0013] The preferred implementation of the 360° omnidirectional scanning conical phased array antenna of the present invention is:

[0014] A phased array with a conical conformal structure composed of multiple antenna elements. There are 24 antenna elements in total, with 4 antenna elements in each column. The column is the unit and the rotation axis of the cone is the center of rotation. ° is the rotation step, and the overall array structure of 24 columns is obtained by rotation.

[0015] The array structure uses 8 columns of antenna elements as a sub-array, and the scanning range of each sub-array is ±15° in azimuth and -15°-75° in elevation.

[0016] The azimuth scanning angle of one sub-array is 30°, and the airspace is equally divided into 12 fan-shaped areas. The array structure is divided into 12 sub-arrays in total, and one sub-array beam covers one fan-shaped area.

[0017] The 12 sub-arrays respectively include columns: 1 to 8; 3 to 10; 5 to 12; 7 to 14, 9 to 16; 11 to 18;...

specific Embodiment

[0022] The antenna unit works in the C band, such as figure 1 As shown, the unit is composed of a radiation patch, a coupling feed patch, and a feed layer, and the unit is fixed with nylon screws around it. The feed layer and the microstrip antenna adopt a back-to-back structure to achieve a common ground. The antenna medium is made of multi-layer microwave plates. The bottom feed layer uses a 3dB bridge. The two lead from the feed layer have the same amplitude and a phase difference of 90° The coupling feed patch is fed through the metalized via hole. The coupling patch is a small metal disc with a radius of 0.8mm. The double feed point excites the top radiation patch through the coupling feed to make the antenna unit radiate to the right Circularly polarized wave.

[0023] The structure of the cone-shaped conformal phased array antenna is as figure 2 As shown, there are 24 rows of antennas, each with 4 units. The distance between two adjacent cells in each column is 30mm, the...

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Abstract

The invention discloses a conical conformal phased array antenna with 360 DEG omni-directional scanning. Multiple antenna elements form a phased array of conical conformal structures. The antenna unitincludes 24 columns of antenna elements, 4 antenna element in each column, each row is arranged as a unit, that rotation axis of the cone surface is taken as a rotation center, and the rotation stepis 15 DEG, so that 24 columns of the whole array structure are obtain by rotation. The antenna elements are composed of a plurality of antenna elements and are integrally arranged in a conical structure. 8 column antenna elements are used as a sub-array, and each sub-array has a scanning range of + / - 15DEG and a pitch range of 15DEG - 75DEG . An azimuth scan angle of a sub-array is 30 DEG, that spatial domain is equally divided into 12 sectors, and the array structure is divided into 12 sub-arrays altogether, and a sub-array beam covers one sector. Compact structure, can achieve surface-to-ground, surface-to-air omni-directional communication. It can cover the whole airspace, and the horizontal direction gain, axis ratio and other indicators are excellent.

Description

Technical field [0001] The invention relates to a radar and communication antenna technology, in particular to a 360° omnidirectional scanning conical surface conformal phased array antenna. Background technique [0002] The phased array antenna controls the antenna beam direction and shape by changing the feed phase of the array unit channel, so that the inherent shortcomings of the traditional mechanical servo antenna system are effectively solved, which can effectively shorten the beam pointing change time and reduce the overall antenna system Size to meet the needs of miniaturization. [0003] At present, the main development trends of phased array antennas at home and abroad include active phased array antennas, millimeter wave phased array antennas, broadband phased array antennas, multifunctional phased array radar antennas, low-cost phased array antennas, low / ultra-low Sidelobe phased array antenna, conformal phased array antenna. [0004] In engineering applications, in or...

Claims

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Application Information

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IPC IPC(8): H01Q21/20
CPCH01Q21/205
Inventor 钟亚君
Owner 北京乾中源科技有限公司
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