An adjusting apparatus and method for array antenna send-receive channel

Abstract

This invention discloses a correcting unit and its method of array antenna send receive channel. Receive correcting and emission correcting coupler that corresponding to the same antenna is bind into one to make the structure of the correcting system concise, and the cost is reduced. Input parts of emission channel testing signal is changed to passive in this invention, that is many-way selection switch is replaced by power splitter or mixer. The input parts are passive because the power splitter or mixer is passive, so it raises the adaptability to outdoor environment

Description

technical field [0001] The invention relates to a correction technology for an array antenna receiving and sending channel, in particular to a correction device and method for an array antenna sending and receiving channel. Background technique [0002] A wireless communication system usually uses an antenna to send and receive user signals, especially a smart antenna to send and receive user signals. The smart antenna adjusts the antenna pattern in real time by changing the weight of the array antenna to enhance the signal gain in the direction of the user's location, thereby effectively improving the strength of the user signal in the wireless communication system and reducing the mutual interference between user signals. The performance of the wireless communication system is improved in terms of spectrum utilization and capacity. [0003] Usually, the smart antenna in the wireless communication system is installed on the base station, and the directional beam of the sma...

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Problems solved by technology

[0014] The calibration system described in Fig. 1 has the following disadvantages. Disadvantage 1: two sets of couplers are used in the transmitting calibration loop and the receiving calibration loop, and the same smart antenna has two couplers for receiving and transmitting, which increases the complexity and cost; Disadvantage 2: A multi-way switch is used in the transmission correction loop. Since the control part of the switch needs to be powered on, it increases the complexity and potential instability of the correction system. If the multi-way switch is placed on the antenna, it will It is difficult to withstand the harsh outdoor environment; if the multi-channel switch is placed in the indoor unit of the base station, it is necessary to use multiple cables to introduce multi-channel coupling signals into the indoor unit, and the inconsistency of multiple cables will be directly mapped to the correction residual error of the channel

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