A High Isolation Dual Polarized Microstrip 4G LTE MIMO Antenna

Abstract

The invention discloses a high-isolation dual-polarization microstrip type 4G LTE MIMO antenna, and the antenna comprises two FR4 PCBs. The first PCB is a single-side board, and a microstrip paster is located on the single-side board. The second PCB is a double-side board, wherein one surface of the PCB is coated with copper, and is provided with two H-shaped slits which are perpendicular to each other, and the other surface of the PCB is provided with two microstrip lines which are perpendicular to each other, and one diamond-shaped polarization isolator. Two ends of the diamond-shaped polarization isolator are connected with copper foil on the other surface of the PCB through a via hole. One end of each of the two microstrip lines is connected with a coaxial line, and the other end of each of the two microstrip lines is located on the projection of the H-shaped slit, and is perpendicular to the H-shaped slit. The slits are located exactly below an antenna radiation paster, and are close to the top of the antenna radiation paster. The diamond-shaped polarization isolator located between the two microstrip lines is used for isolating the radiation between the two microstrip lines. The antenna is good in electrical performance, is small in size, is simple in structure, and is low in cost. The antenna can serve as a single antenna, and also can serve as an element of an antenna array.

Description

technical field [0001] The invention relates to a dual-polarized microstrip 4G LTE MIMO antenna with high isolation. Background technique [0002] The fourth generation (4G LTE) mobile communication is rapidly popularizing, and the core technologies of the fourth generation mobile communication are Multiple Input Multiple Output (MIMO) and Orthogonal Frequency Division Multiple Access (OFDM). MIMO is a technology that uses multiple antennas to communicate simultaneously at the transmitting end and the receiving end, which can improve the communication capacity, data transmission speed and anti-multipath fading ability of the communication system. Antennas that implement MIMO often use multiple antennas or a single antenna has two polarizations, such as vertical polarization and horizontal polarization, right-hand circular polarization and left-hand circular polarization, and ±45° linear polarization. Among them, the dual-polarized antenna can not only realize 2x2 MIMO in a ...

AI Technical Summary

Problems solved by technology

[0004] 1) The structure is too complex (three layers or more), the cost of the antenna is high, and it is not conducive to commercial applications;

[0005] 2) The isolation is low, only about 25dB;

[0006] 3) The size of the antenna is too large to be suitable for small communication equipment;

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