Antenna system having gain auto-correction function

Abstract

Aiming at the problem that an existing antenna system with a dielectric lens does not consider a thermal expansion effect of the dielectric lens in a wide temperature range, the invention provides an antenna system having a gain auto-correction function. The antenna system comprises a substrate aluminum plate, a base, radiation antennas, a dielectric lens plate and a lifting device, wherein the base is arranged at the bottom of the substrate aluminum plate, the radiation antennas are arranged at the top of the substrate aluminum plate, the dielectric lens plate is arranged on the radiation antennas, the dielectric lens plate and the substrate aluminum plate are movably connected by the lifting device, and the relative distance between the dielectric lens plate and the radiation antennas is adjusted by the lifting device. The antenna system has the technical effects that a temperature change coefficient of the dielectric lens is adjusted by self-adaptive height adjustment, and the problems of gain fluctuation and beam change of the antenna system in the wide temperature range are effectively solved.

Description

technical field [0001] The invention belongs to the field of high-gain antennas with a wide temperature range, in particular to a dielectric lens-based microwave and millimeter-wave antenna gain automatic adjustment system, specifically an antenna system with a gain self-correction function. Background technique [0002] In recent years, the rapid development and functional requirements of microwave and millimeter wave communication systems with dynamic beam adjustment, high-gain perimeter protection radars, and high-gain detection equipment have greatly promoted the development of microwave and millimeter-wave antennas. At the same time, high-gain antennas have proposed more demanding. Since most microwave and millimeter wave systems are required to work outdoors, the ambient temperature varies from -40 degrees to 50 degrees. This not only requires the microwave circuit to have a high and low temperature adaptive processing system, but also requires that the antenna not on...

AI Technical Summary

Problems solved by technology

[0003] 1. The increase of active devices and circuits will reduce the reliability of the system, especially the failure of active devices will cause the entire system to fail to work

[0004] 2. Active devices are usually enclosed in a cavity made of metal or other materials, and due to the heat dissipation of other power devices in the cavity, there will be a large gap between its temperature change and the outdoor ambient temperature, which cannot reflect the impact of temperature changes on the lens structure. influences

[0005] 3. The feedback signal usually collected by active devices comes from the output coupling signal of the final stage amplifier, so its gain stabilization circuit can only adjust the output signal of the final stage amplifier, but cannot achieve effective temperature self-control for the signal fed into the antenna system. adapt

But the disadvantage of this design is that the lens material will produce slight changes in structure as the temperature changes, and the changes of electromagnetic waves passing through the lens are very sensitive to these structural parameters of the lens, and small changes in the lens structure will affect the system. radiation characteristics, especially the gain has a noticeable effect on the

In summary, the existing dielectric lens-loaded antenna structure does not solve the above problems

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