All airspace active multi beam spherical phased array antenna direction diagram measurement system

Abstract

The invention provides an all airspace active multi beam spherical phased array antenna direction diagram measurement system. The provided measurement system has the advantages of flexible control, high directional accuracy and low cost, and uses electric scanning to replace mechanical scanning. According to the technical scheme provided by the invention, when a direction diagram test link is received, a signal transmitting and receiving device transmits a test frequency point signal to an auxiliary antenna of a calibration tower; a spherical phased array antenna receives a signal transmitted by the auxiliary antenna; a receiving beam is formed through an active digital multi-beam forming device; the signal transmitting and receiving device receives and records the signal level, and reports the signal level to automation test software of an automation test device; the automation test software of the automation test device controls the active digital multi-beam forming device to form a transmitting and receiving beam in a certain direction and acquire the signal level of the transmitting and receiving beam; two-dimensional electric scanning is carried out on the whole airspace; and three-dimensional images are respectively drawn for the directional azimuth and the elevation angle of the transmitting and receiving beam, and the signal level corresponding to the direction, so as to acquire a transmitting and receiving three-dimensional direction diagram of the antenna.

Description

technical field [0001] The invention relates to a system structure for measuring the pattern of an all-space active multi-beam spherical phased array antenna. Background technique [0002] In recent years, as an important development direction of civil and military antenna technology, phased array antenna has attracted much attention. In the phased array antenna, the active multi-beam antenna signal transceiver system refers to the ability to generate two or more independently controllable beams, and each beam can be aimed at the target, and the signal transmission to each target can be completed independently. or receive. The beam of the phased array antenna is controlled by a computer, and it scans almost without inertia in space. It has great flexibility. The maximum radiation direction of the antenna changes with the flexible beam scanning; in addition, the arrangement of the antenna elements Factors such as element spacing and weighting function all have a great influ...

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Problems solved by technology

[0005] 1. The cost of building a test environment for near-field measurement in a microwave anechoic chamber environment is high, and it is even difficult to realize the antenna with a large external size;

[0006] 2. The far-field measurement method of the conventional free-space test environment is not suitable for large-scale spherical phased array antennas, because the weight of the antenna can reach several tons. The antenna is equipped with a three-axis mechanical servo turntable to drive the rotation of the antenna's azimuth and pitch to achieve the requirements. very high and costly

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