High-power microwave impulse shield

Abstract

The invention provides a high-power microwave impulse shield. The high-power microwave impulse shield is characterized by comprising at least two layers of band pass frequency selecting plates, wherein the adjacent band pass frequency selecting plates are parallel with each other and a loading medium is filed between the adjacent band pass frequency selecting plates; each band pass frequency selecting plate is a conductive plate, and periodic small units are distributed on each band pass frequency selecting plate; hollowed-out patterns are etched on each small unit; each small unit is divided into at least two conductive regions which are mutually separated by the hollowed-out patterns; and at least one TVS (transient voltage suppressor) is welded among mutually separated conductive regions in the same small unit or among different small units. By utilizing different electromagnetic properties of the TVS under different power microwave signals, the TVS can keep high-power microwave impulse electromagnetic wave out of the shield on the premise that the transmission of a normal small signal is not affected, thereby preventing a high-power microwave impulse from entering into sensitive electronic equipment to generate destruction.

Description

technical field [0001] The invention belongs to the technical field of strong electromagnetic pulse protection, and in particular relates to a high-power microwave pulse protective cover suitable for L, S, and C band radars and the periphery of communication equipment antennas. Background technique [0002] With the development of electromagnetic pulse technology, the high-power microwave pulse radiation field intensity generated by high-power microwave weapons reaches hundreds of kV / m, the pulse rise time is as short as possible, and the pulse duration can reach tens of ns to tens of us. Radar and communication electronic equipment in the S and C frequency bands are becoming more and more harmful. The electromagnetic pulse voltage and current induced by high-power microwaves on electronic equipment can instantly breakdown or burn communication equipment, so there is an urgent need for electronic equipment in this frequency band Protect against high power microwaves. [000...

AI Technical Summary

Problems solved by technology

[0004] At present, radar protection mainly uses the limiter at the rear end of the antenna to limit the high-power signal, but it cannot protect high-power microwaves for the following reasons: First, the limiter generally uses the breakdown of protective devices such as gas discharge tubes. It plays the role of protection, and its response time is more than tens of ns, which cannot protect the high-power microwave with ns-level rising edge time; secondly, after the high-power microwave is reflected by the large area array antenna and superimposed gain, the instantaneous power rises An order of magnitude, the limiter may be damaged; in addition, many sensitive equipment antennas are active antennas, and high-power microwaves may have caused damage to the active antenna before the limiter works.

[0005] So far, there is no specific protection against high power microwaves

Images