A vivaldi antenna for near-field imaging of 30-40ghz millimeter waves

Abstract

The invention discloses a Vivaldi antenna for near-field imaging of 30-40GHZ millimeter waves, and relates to the field of communication technology. The antenna reduces the number of upper and lower exponential curve sides within 30-40GHZ by redesigning the shape of the exponential curve side The energy of the electromagnetic field dissipates, and then increases the gain in this frequency band, reduces the side lobe, and the effective frequency band between 30-40GHZ is wider; the shape of the gap is redesigned, which can make the direction of some messy currents in the tail wing and the main The radiation direction is consistent, reducing stray currents and increasing the gain; adding a director, and then further reducing the electric field different from the main radiation direction, enhancing the electromagnetic field in the main radiation direction, suppressing the cross-polarization phenomenon more obviously, and increasing the gain effect.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a Vivaldi antenna for near-field imaging of 30-40GHZ millimeter waves. Background technique [0002] An existing Vivaldi antenna for near-field imaging of a class of 30-40GHZ millimeter waves includes a dielectric plate, the upper surface of the dielectric plate is provided with a feeder, an upper radiation arm integrally connected with the feeder, and the lower surface of the dielectric plate is provided with The ground layer, the lower radiating arm integrally connected with the grounding layer, the upper radiating arm and the lower radiating arm are provided with exponential curved edges, and two notches at the end of the radiating arm. The part with the notch is generally called the rear end of the radiating arm The edge is corrugated, the notch is a long and narrow oblique triangle, and the distance between the two notches is 0.5mm. [0003] The Vivaldi antenna for ne...

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Problems solved by technology

[0004] 1) During the use of the antenna, the electromagnetic field energy of the upper and lower exponential curves has a large energy dissipation within 30-40GHZ. The gain in this frequency band is too small and the side lobe is too high. The effective frequency band is narrow;

[0005] 2) During the use of the antenna, the corrugated distribution of the rear edge of the radiating arm leads to insufficient improvement in the ability to reduce the clutter current of the tail, and there are still many electric fields with different main radiation directions. The ability to enhance the main radiation electric field is insufficient, and the gain needs to be improved. improve;

[0006] 3) The antenna lacks a director, resulting in more electric fields with different main radiation directions, and the ability to enhance the main radiation electric field is insufficient

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