Three frequency range double antenna with high isolation

Abstract

The invention discloses a three frequency range double antenna with high isolation. The isolation in distributed control system (DCS) / process control system (PCS) / universal mobile telecommunications system (UMTS) frequency ranges is superior to -20dm, the design of the double antenna adopts a network compensation theory and an acad develop system (ADS) and high frequency structure simulator (HFSS) collaborative simulation optimized method, and an optimized model comprises three constituent parts of (1) four-antenna S parameter matrix, (2) power divider and (3) phase shifter. A material object of the double antenna is manufactured according to the optimized model for testing and verifying, the isolation in the DCS / PCS / UMTS frequency ranges is superior to -20dm, the simulation better coincides with a testing result, and effectiveness of the double antenna provided with the high isolation and designed in the DCS / PCS / UMTS frequency ranges is verified.

Description

technical field [0001] The patent of the present invention relates to a user equipment (UE) DCS / PCS / UMTS three-band dual antenna with high isolation. Background technique [0002] In order to utilize existing spectrum resources more effectively and promote the gradual commercial use of LTE, multi-mode multi-link UEs (M3L-UEs) have received increasing attention. For example, 3GPP has defined Type A and Type B terminals as M3L-UE in the new version. Since M3L-UE is an intelligent mobile terminal with multiple wireless links activated simultaneously, it will face a large number of software and hardware technology and product realization problems. Among the many hardware technical problems of M3L-UE, the radio frequency mutual interference problem is one of the most urgent basic and key technical problems to be solved. The reason is that the M3L-UE is a miniaturized device, the multiple antennas of the M3L-UE are very close to each other, and the electromagnetic mutual couplin...

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Problems solved by technology

[0004] Through the search of the existing technology, it is found that the existing multi-antenna design often lacks clear design ideas and the frequency band involved in improving the isolation is often a single frequency band, such as the article in ELECTRONICS LETTERS Vol.46, No.6: with high Compact MIMO antenna with high isolation performance, the paper introduces a dual-antenna with high isolation in the WLAN (2.4G) frequency band, but the design of the connection line added to improve the isolation is not clear The design idea, the logic of the design is not strong, it is not universal, and it can only improve the single-band WLAN (2.4G)

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