Antenna unit

Abstract

The invention discloses an antenna unit. The antenna unit comprises a first dielectric layer, a ground plane, a feed point, a second dielectric layer and a feed line, wherein the ground plane and thefeed point are located on the lower end surface of the first dielectric layer; the second dielectric layer is located on the first dielectric layer, a radiation unit is arranged on the second dielectric layer, the radiation unit is connected with the ground plane through cross-shaped grounding channels, gaps are formed between the cross-shaped grounding channels, the gaps can generate effective current, and the radiation unit is a symmetrical dipole; the feed line is located on the radiation unit, and the feed line and the feed point generate excitation to the radiation unit; and the dielectric constants of the first dielectric layer and the second dielectric layer are greater than that of air. According to the invention, the radiation unit is a composite oscillator, the consistency of anE surface and an H surface of a directional diagram of the composite oscillator is very good, the back lobe energy is very small, the front-to-back ratio is very good, the bandwidth is relatively wide, the power consumption is relatively low, and the efficiency is relatively high; and the size of the radiation unit can be reduced, so that the overall height of the oscillators is reduced, and the coupling between the oscillators is reduced to a certain extent.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to an antenna unit. Background technique [0002] With the development of communication technology, antenna units with different frequencies, different specifications and different channel numbers are widely used, which makes spectrum resources continuously expanded and utilized, and antenna resources are already very limited. In the case of scarce antenna resources, it is necessary to miniaturize the antenna unit on the premise of ensuring the coverage and coverage effect of the antenna. [0003] Conventional antenna units are as follows: The first is a half-wavelength symmetrical vibrator, which uses metal die-casting, sheet metal forming or PCB (Printed Circuit Board, printed circuit board) double-sided copper-clad plate instead of metal material, through the coaxial cable or PCB for feeding; the second is a patch vibrator, which uses metal or microstrip; the thir...

AI Technical Summary

Problems solved by technology

[0004] The first type of antenna elements are all half-wave symmetrical oscillators with wide bandwidth, but the oscillators are larger in size and higher in profile. If you want to reduce the distance between array elements in pursuit of miniaturization, strong coupling will occur between array elements, which will affect The radiation performance and scattering parameters (S parameters) of the antenna; the bandwidth of the second antenna unit is narrow, and the front and rear are relatively poor; the loss of the third antenna unit is large and the efficiency is not high

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