Miniaturized Frequency Selective Surface Based on Double Split Resonator

Abstract

The invention discloses a miniaturized frequency selection surface based on a double-opening resonance ring. A band-pass effect is formed through the combined action of the double-opening resonance ring and a middle coupling aperture. When electromagnetic wave is irradiated to the frequency selection surface, resonance is caused by the opening resonance ring. The frequency selection characteristicof the opening resonance ring is utilized, so that a high spatial filtering function is achieved, meanwhile, the miniaturization characteristic is realized; compared with a common frequency selectionsurface, the cell area is greatly reduced, and the size of the whole circuit unit is only 0.3lambda 0*0.3lambda 0; meanwhile, by virtue of mutual coupling between the opening gap of the resonance ring and an interlayer coupling window, a good out-of-band rejection effect is achieved; and a transmission zero point is arranged on each of the two sides of the band, so that the rectangular coefficient of the circuit is greatly improved. A symmetrical circuit structure is adopted, so that the structure is simple, and machining is easy; and meanwhile, the whole circuit is quite high in stability around the incident angle theta and a formula which is as shown in the specification, so that the practical value is increased.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a miniaturized frequency selective surface based on double split resonant rings. Background technique [0002] The Ka-band is part of the microwave band of the electromagnetic spectrum with a frequency range of 26.5-40GHz. Because this band has the characteristics of wide available bandwidth and small size of equipment. Therefore, the Ka-band satellite communication system can provide new means for high-speed satellite communication, gigabit-level broadband digital transmission, and so on. [0003] As an important force to promote the development of science and technology, the innovation of military technology often leads the direction of scientific research. In modern warfare, it has become an important development trend for military targets (such as fighter planes, ships, etc.) to have stealth performance against electromagnetic waves; space science The rise of (such as sa...

AI Technical Summary

Problems solved by technology

However, due to the inherent shortcomings of the structure itself, the unit circuit area is relatively large, generally about 0.5λ 0 ×0.5λ 0 , and there exists a circuit as a whole with respect to the angle of incidence θ and problems such as poor stability

Although the circuit size of the ring unit has been improved, its structure is relatively complicated, and it is difficult to take into account the performance of the passband and stopband, which greatly limits the practical application

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