Cylindrical wave amplitude characteristic electric adjustment type compensation measurement system

Abstract

The invention discloses a cylindrical wave amplitude characteristic electric adjustment type compensation measurement system, which comprises an operation table, a scanning frame and a dead zone cylindrical surface field. A main control computer is arranged on the operation table. A power amplifier, a vector network analyzer and a receiving probe are arranged on the scanning frame. The receiving probe is arranged on the scanning frame through a linear scanning device. The linear scanning device is provided with a laser tracker, and the laser tracker is connected with a main control computer through a cable. A control case is arranged at the bottom of the scanning frame. The receiving probe is connected with the vector network analyzer through a low-noise amplifier, the vector network analyzer is connected with a power amplifier, and the power amplifier is connected with a feed source through the control case. The amplitude deviation between each direction of the receiving probe antenna and the main lobe is measured in advance, the included angle relation between the scanning position of the receiving probe antenna and a virtual line source is measured in real time through the laser tracker, corresponding angle amplitude compensation is carried out on measured data through the relative amplitude relation, and the detection precision is improved.

Description

technical field [0001] The invention relates to a cylindrical wave amplitude characteristic measurement system, in particular to an electric adjustment compensation measurement system for the cylindrical wave amplitude characteristic. Background technique [0002] With the development of stealth and anti-stealth technology research and satellite technology, the accuracy and function requirements of high-performance radar antenna, radome characteristic test and radar target RCS test are getting higher and higher. Common testing methods include far-field testing, near-field testing, and tight-field testing, among which tight-field testing has a wide range of applications, high testing accuracy, and convenient use. In recent years, various types of compaction fields have been built in China to meet different test requirements. The main types are the compaction fields that generate plane waves and the compaction fields that generate cylindrical waves. There are differences in th...

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Problems solved by technology

Since the cylindrical wave is generated by the virtual line source and presents a cylindrical divergence, when the amplitude characteristics of the center of the quiet zone are measured using a straight-line scanning guide rail, when the scanning position of the receiving probe antenna changes, the angle between the main lobe of the probe antenna and the virtual line source The angles ψ1 and ψ2 are constantly changing, which creates a deviation in the real-time detection of the cylinder wave amplitude, resulting in poor measurement accuracy and reduced measurement accuracy

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