PCB liquid crystal phased array antenna

Abstract

The invention discloses a PCB liquid crystal phased array antenna, which comprises an antenna cover layer and a spacing layer, wherein the antenna cover layer and the spacing layer are arranged at aninterval, and an air dielectric layer is formed between the antenna cover layer and the spacing layer; a first transmission line layer which is arranged on the spacer layer and located in the air dielectric layer; an air dielectric layer which is provided with a source device, wherein the active device is connected with the first transmission line layer; a phase shifter layer which is connected with the spacer layer, wherein the phase shifter layer is electrically connected with the active device through a first metallized via hole; a third dielectric layer which is connected with the phase shifter layer; and a second transmission line layer which is connected with the third dielectric layer, wherein the second transmission line layer is electrically connected with the phase shifter layerthrough a second metallized via hole. According to the invention, the problem is solved that it is difficult to package a liquid crystal phase shifter serving as an independent device in the same chiptogether with a power device like a traditional phase shifter in a centralized manner, so that the loss of the phase shifter is difficult to compensate through the power device.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to the technical field of phased array antennas. Background technique [0002] The demand for low-cost phased array antennas in new infrastructure fields such as satellite communications and 5G is becoming more and more prominent. The advancement of high-performance electromagnetic liquid crystal material technology provides an effective solution for the design of low-cost, low-power phased array antennas. As a revolutionary technological innovation, liquid crystal phased array antenna technology has become the focus of research and development by many manufacturers. focus. [0003] The liquid crystal molecules can be deflected according to the change of the electric field intensity, and then the purpose of adjusting the relative permittivity can be realized. The basic principle of liquid crystal phase shifter is to adjust and control the relative permittivity of liquid cryst...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a PCB liquid crystal phased array antenna. On the one hand, it solves the problem that the liquid crystal phase shifter is separately sealed in the glass box, and the glass metallization via hole process still has difficulties; on the other hand, it solves the problem of liquid crystal phase shifting. As an independent device, it is difficult to package the power device in the same chip as the traditional phase shifter, which makes it difficult to make up for the loss of the phase shifter through the power device.

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