A Tunable Decoupling Network for Multiple Antenna Systems

Abstract

The invention discloses a tunable decoupling network for a multi-antenna system, comprising a tunable circuit and N-1 parasitic bodies, where N is equal to the number of antennas in the multi-antenna system, and the tunable circuit consists of N-1 tunable Unit composition, each tunable unit includes three electronic devices respectively, the three electronic devices are tunable capacitors or tunable inductances, one end of the first electronic device is used as the first connection end of the tunable unit, and the other end of the first electronic device is used as the first connection end of the tunable unit. One end, one end of the second electronic device and one end of the third electronic device are connected and the connection end is the second connection end of the tunable unit, the other end of the second electronic device is the third connection end of the tunable device, the third electronic device The other end of the device is grounded, the second connection ends of the N‑1 tunable units are connected to one end of the N‑1 parasitic bodies in a one-to-one correspondence, and each adjacent two antennas are connected to the transmitter through a tunable unit; the advantages It has a wide decoupling bandwidth and frequency while meeting the requirements of miniaturization.

Description

technical field [0001] The present invention relates to a tunable decoupling network, in particular to a tunable decoupling network for a multi-antenna system. Background technique [0002] With the development of wireless communication technology in the direction of diversification, broadbandization, integration and intelligence, mobile data traffic is showing an explosive growth trend. Multiple-Input Multiple-Output (MIMO) technology is a communication technology that can effectively improve wireless communication capacity and spectrum utilization. In order to implement the MIMO technology in a modern wireless communication system, a multi-antenna system composed of multiple antennas needs to be configured on the mobile terminal of the wireless communication system, and the transmitter of the mobile terminal transmits signals through the multiple antennas. Under the requirements of multi-functional integration, mobile terminals not only need to widely support various comm...

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Problems solved by technology

However, the above-mentioned first decoupling scheme will lead to an overall increase in the size of the multi-antenna system, which does not meet the needs of miniaturization. The decoupling bandwidth and frequency achieved by the second decoupling scheme are extremely limited, and it is difficult to meet the decoupling requirements. , the third decoupling scheme, because the tunable components used are lumped components, can make the tunable decoupling network have the characteristics of miniaturization, which is conducive to the miniaturization of the multi-antenna system, and can realize the decoupling working frequency band in the Switching within the entire frequency coverage range, but its decoupling working frequency band bandwidth and tunable working frequency band coverage are limited by the tuning range of tunable components, usually the working bandwidth is narrow, decoupling working frequency band bandwidth and tunable working frequency band coverage Still unable to meet the requirements of broadband decoupling

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