Microwave dark chamber used for third-order cross modulation and standing wave testing of antenna

A technology of third-order intermodulation and microwave anechoic chamber, which is applied in the field of microwave anechoic chamber to achieve the effect of high shielding efficiency, improving shielding efficiency and standardizing test data

Inactive Publication Date: 2016-08-03
张宇桥
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of existing microwave anechoic chambers used for antenna intermodulation testing, the present invention provides a new type of microwave anechoic chamber, which solves the above problems by redesigning the shielding structure and the hysteresis-free isolation layer

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  • Microwave dark chamber used for third-order cross modulation and standing wave testing of antenna

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Embodiment 1

[0015] The microwave anechoic chamber is mainly composed of a main frame, a shielding shell and a wave-absorbing material, as well as matching shielding accessories. Auxiliary parts include power supply, ventilation, lighting, communication and other auxiliary systems.

[0016] There are two purposes of shielding: ① to limit the radiation of internal electromagnetic energy; ② to prevent external radiation waves from entering a certain area. The quality of the shielding effect is not only related to the performance of the shielding material, but also related to the radiation frequency, the distance between the shielding shell and the radiation source, and the various discontinuous shapes and quantities that may exist on the shell. When designing shielding, one should first understand the field strength of the shielding area before shielding and the allowable field strength after shielding. The difference between the two is the required shielding effectiveness. The scheme desig...

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Abstract

The invention belongs to the field of microwave testing and relates to a microwave anechoic chamber for third-order intermodulation and standing wave testing. The microwave anechoic chamber is composed of the main body of the anechoic chamber and the absorbing material arranged in the main body of the anechoic chamber. space, the surface of the shielding shell facing the closed space is provided with a shielding layer, the absorbing material is fixed on the shielding layer, the material of the shielding shell is steel plate, and the shielding layer The structure is a sandwich plywood, the inner and outer layers of the sandwich plywood are wood plywood, and the sandwich layer is aluminum foil. The microwave anechoic chamber of the present invention is not only low in cost, easy to process, unrestricted in the manufacture of the anechoic chamber space, and can be manufactured into a large-scale microwave test anechoic chamber, but also has high shielding efficiency, can shield magnetic fields, and forms a non-magnetic environment, which will not cause new problems for antenna testing. The intermodulation effect can meet the test accuracy requirements.

Description

technical field [0001] The invention belongs to the field of microwave testing, in particular to a microwave anechoic chamber for third-order intermodulation and standing wave testing. Background technique [0002] The patent application "A Microwave Anechoic Chamber for Intermodulation Test" with publication number CN102839844A discloses a microwave anechoic chamber for antenna intermodulation testing. The main body of the darkroom is a closed space composed of a keel frame and a block wall fixed on the keel frame, which can accommodate the staff to walk inside, and the block wall faces the closed space. A shielding layer is provided on which the absorbing material is fixed, and an operating platform for staff to walk is provided inside the main body of the darkroom; the shielding is made of aluminum alloy plates, including a keel and a shielding layer. This scheme weakens the interference sources that are easy to excite and intermodulate in the shield structure to a certa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04H9/16E04B1/92
CPCE04H9/16E04B1/92E04B2001/925
Inventor 刘本东毛莹张宇桥徐仁权周春杰
Owner 张宇桥
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