Phased array antenna unit characteristic near-field measurement method

A phased array antenna and measurement method technology, applied in directions such as antenna radiation patterns, can solve problems such as inter-unit coupling interference, and achieve the effect of eliminating coupling interference and solving inter-unit coupling interference

Active Publication Date: 2014-07-16
10TH RES INST OF CETC
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Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies in the prior art and provide a phased array antenna unit amplitude-phase characteristic near-field solution that solves the technical problem of inter-unit coupling interference in the phased array antenna unit amplitude-phase characteristic near-field measurement. Measurement methods

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Embodiment Construction

[0023] Refer to figure 1 . In the embodiment of the near-field measurement method for the amplitude and phase characteristics of the phased array antenna unit described below, according to the present invention

[0024] (1) Choose a computer PC, a vector network analyzer PNA, a controller, a phased array antenna AUT under test, and a near-field scanner with a probe mounted on the near-field scanner. The AUT is used as a transmitting antenna, and the probe is used as a receiving antenna. The scanning frame is installed in front of the measuring antenna port, at a distance of d, where d is 3-5 wavelengths. The PNA is connected to the AUT and serves as the signal source of the AUT to provide a stable single-frequency signal. At the same time, the PNA couples the signal back to the PNA measurement port A as a reference signal. The measurement port B of the PNA is connected to the probe to measure the amplitude of the signal received by the probe. And phase. The PNA is connected t...

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Abstract

The invention provides a phased array antenna unit characteristic near-field measurement method. The near-field measurement method can measure directional diagrams and opening surface near fields of independent units when all the units work at the same time. According to the technical scheme, the method comprises the steps of selecting a measured phased array antenna AUT, and using a vector network analysis meter PNA connected with a PC and a controller and a near-field scanning frame probe respectively connected with the PNA and the controller to form a near-field measuring system for detecting the antenna unit amplitude phase characteristics. The AUT is used as a transmitting antenna, the probe is used as a receiving antenna, and the scanning frame probe is arranged in front of the opening face of a measuring antenna. Devices are connected according to a near-field measuring method, when the magnitude-phase characteristic am of the mth unit of the phased-array antenna is measured, a vector average method is adopted by each measuring point in a near-field scanning plane, a T/R component, an array element and the magnitude-phase characteristic H m<n>=a<m> S m<n>, n=1,...N from the array element to a measuring point space link assembly of the mth unit are measured and calculated, and the magnitude-phase characteristic am of the phased-array measuring unit is calculated.

Description

Technical field [0001] The invention relates to the field of phased array antenna measurement, in particular to a near field measurement method of the amplitude and phase characteristics of each unit of an active phased array antenna. technical background [0002] in Figure 7 In the shown prior art active phased array antenna, a phased array antenna includes M units with the same characteristics, and each unit is mainly composed of T / R components and passive array elements in series. Theoretically, the amplitude and phase characteristics of these units are exactly the same, namely a 1 =a 2 =...=a M However, due to the difference in the performance of the components used in each unit during the manufacturing process of the phased array antenna, there is also an error in the installation position of the array element, resulting in inconsistent amplitude and phase characteristics between the units. Accurately measuring the amplitude and phase characteristics of the phased array ante...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/10
Inventor 杜艳何海丹曾浩何庆强杨顺平
Owner 10TH RES INST OF CETC
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