Flexible light and thin multichannel transmission line

Abstract

The invention provides a flexible light and thin multi-channel transmission line. The transmission line comprises a plurality of layers of transmission line ports, a middle conduction line and a plurality of layers of transmission line ports; a middle conducting layer comprises a first metal layer, a first dielectric layer, a middle wiring layer, a second dielectric layer and a second metal layer which are arranged in sequence, and a first metalized through hole penetrating through each layer; the multi-layer transmission line port comprises a third dielectric layer connected with the first dielectric layer, a port wiring layer connected with the middle wiring layer, a fourth dielectric layer connected with the second dielectric layer, a metalized grounding hole penetrating through each layer, a first metalized connecting hole which penetrates through the third dielectric layer and is connected with the port wiring layer, and a bonding pad which is connected with the first metalized connecting hole. Compared with a traditional transmission line, the transmission line has the advantages of being easy to integrate, suitable for multi-channel transmission, low in insertion loss, low in reflection loss, low in profile, bending resistance, low in hygroscopicity and the like. The method is suitable for big data communication requirements of MIMO technology and informatization communication, and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of transmission lines, in particular to a flexible, thin, multi-channel transmission line. Background technique [0002] In 2017, Apple applied liquid crystal polymer antennas and soft boards on a large scale for the first time on its flagship machine to improve the high-frequency performance of the antenna and reduce space occupation. Among them, the stand-alone value of the flexible board antenna is about 8-10 dollars, while the stand-alone value of the independent PI antenna of the iPhone 7 is about 0.4 dollars, and the value of the stand-alone device from the PI antenna to the soft board antenna has increased by about 20 times. In addition, iPhoneX also uses soft boards in trunk lines and cameras. The first large-scale use of soft boards in iPhone X is of great significance, which can be interpreted as Apple's advance layout and verification for 5G; for the consumer electronics industry, soft boards are...

AI Technical Summary

Problems solved by technology

Generally speaking, in order to match the impedance of the transmission line with components such as antennas and radio frequency circuits, the profile of the strip line is generally relatively low, and long-term bending can easily cause the transmission line to break

By thickening the transmission line, its own mechanical strength can be enhanced, but it is often difficult to ensure the impedance matching between the signal line and the antenna and RF front end, as well as its own anti-bending characteristics

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