Coaxial Waveguide Two-Dimensional Electromagnetic Bandgap Structure

Abstract

The invention discloses a coaxial waveguide two-dimensional electromagnetic band gap structure. The coaxial waveguide two-dimensional electromagnetic band gap structure comprises an inner conductor, a filler, an outer conductor, and first and second uneven structures which are arranged between the inner conductor and the outer conductor and equipped with angular and axial two-dimensional periodicity. Compared with the prior art, the electromagnetic band gap structure provided by the invention adopts the coaxial waveguide; the electromagnetic band gap structure has the advantages of high power capacity, low loss, strong heat dissipation, and easy integration with the signal transmission system in the microwave technical field; meanwhile, the uneven structures are introduced to obtain the band gap characteristics; the implementation way promotes the manufacturing and processing in the high-frequency application; and in addition, due to the band gap characteristic, the opposite angular position of the first and second uneven structures can be changed through a rotary way to be regulated, so that the band gap can be controllable. The coaxial waveguide two-dimensional electromagnetic band gap structure can be used as the harmonic suppressor or the band elimination filter with adjustable Q value for suppressing interference or noise in the high-power microwave application fields of microwave communication, satellite communication, remote sensing and remote metering, radar, navigation, electronic countermeasures and the like.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a two-dimensional electromagnetic bandgap structure of a coaxial waveguide. Background technique [0002] Electromagnetic bandgap (EBG) structure is an artificial periodic structure, usually composed of a dielectric structure with a periodic distribution of dielectric constant or a periodic arrangement of dielectric, metal or a mixture of units. The most notable feature of the electromagnetic bandgap structure is that it presents a bandstop characteristic for electromagnetic waves in a specific frequency range, so that the propagation of electromagnetic waves whose frequency falls within the bandgap is strongly suppressed. Taking advantage of this characteristic, the electromagnetic bandgap structure has been widely used in the field of microwave technology, and its applications involve filters, power dividers, resonators, mixers, power amplifiers, harmonic suppressors, microw...

AI Technical Summary

Problems solved by technology

Various devices implemented using these EBG structures need to be connected to each other through special converters with commonly used coaxial waveguide-based transmission systems, and when the operating frequency of the structure is high (such as when working in the terahertz frequency band), in order to obtain The size of the diaphragm loaded due to the bandgap characteristics will become extremely small, which will lead to difficulties in processing

In addition, the bandgap characteristics of the existing waveguide EBG structure are often fixed under the condition of certain structural parameters, which is difficult to adjust, thus limiting its application in fields such as filters

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