Single-feed source periodically arranged groove slot panel antenna

Abstract

The invention provides a single-feed source periodically arranged groove slot panel antenna, which consists of a grounding plate and a plurality of periodically arranged groove structures loaded on two sides of a slot source, and a distance between a slot and a neighbouring groove is less than a groove period. Different from the radiation mechanism of a traditional periodically arranged groove structure, the grooves of the invention cannot be taken as a secondary radiation source any more, because the phase of an electric field at the grooves is opposite to the phase of the electric field at the slot. Another novel electromagnetic oscillation mode that two neighbouring grooves are integrally taken as the secondary radiation source which radiates energy to the space is generated on the surface of the antenna. The novel antenna has the characteristics of more compact structure and more flexible design, and is smaller in the compression angle of an H surface and antenna gain is improved to some extent compared with the traditional groove slot antenna with the same groove number.

Description

technical field [0001] The invention relates to a slot antenna, in particular to a single-feed periodic groove slot flat panel antenna. Background technique [0002] Recently, H.J.Hezec et al. (Document: Science, 297, 820-820 (2002)) experimentally reported that loading one-dimensional or annular groove structures around subwavelength apertures can produce directional beams with abnormal transmission and narrow beam angles, aroused widespread interest of researchers. Subsequently, its theory and application emerged continuously, and this surface trench structure was extended to higher wavelengths. In the microwave band, people first verified the existence of the abnormal transmission and beaming effect after loading the trench structure, and attributed this phenomenon to the enhancement of resonance excitation of surface plasmons and the far-field diffraction of surface plasmon waves. The beaming effect is a very interesting phenomenon, which has potential applications in ...

AI Technical Summary

Problems solved by technology

However, the period of the groove structure of the traditional groove antenna is similar to the wavelength, and it usually takes several periods to achieve a significant beaming effect, which makes the overall size of the antenna too large, resulting in a low aperture utilization rate, and cannot meet the increasingly miniaturized needs of the antenna field.

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