Intelligent antenna calibration network and calibration method

Abstract

The invention provides an intelligent antenna calibration network and a calibration method thereof, which are suitable in the antenna field. The calibration network comprises N feed networks, N columns of radiators, N directional couplers and an equal-power distributor; wherein, the radiator of each column comprises M radiation units; a main feed line of each feed network is connected to a radio frequency signal launcher; the M branches are respectively connected to the M radiation units; radio frequency signals launched by the radio frequency signal launcher are distributed to the M radiation units through the M branches; one end of the directional couplers is connected to some branch of the feed network while the other end is connected to a branch of the equal-power distributor; after the branch of the equal-power distributor is coupled with some branch of the feed network, the signals are output to a calibration port. The intelligent antenna calibration network provided by the invention respectively couples each branch in the equal-power distributor with the corresponding some branch in the feed network through the directional coupler; the self unconformity of the feed network is calibrated too, thus improving the calibration precision.

Description

technical field [0001] The invention belongs to the field of antennas, in particular to an intelligent antenna calibration network and a calibration method thereof. Background technique [0002] The smart antenna is a two-way antenna installed on the base station site. It obtains directivity through a set of fixed antenna units with programmable electronic phase relationship, and can simultaneously obtain the directional characteristics of each link between the base station and the mobile station. The smart antenna directs the radio signal to a specific direction, generates a spatially directional beam, aligns the main beam of the antenna with the direction of arrival of the user signal (Direction of Arrinal, DOA), and aligns the side lobes or nulls with the direction of arrival of the interference signal to achieve full and efficient use The purpose of moving user signals and removing or suppressing interfering signals. [0003] When the smart antenna is used, it is requir...

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Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a smart antenna calibration network, aiming to solve the problem that the existing calibration network is set at the main feeder of the feed network, resulting in the inconsistency of the feed network itself not being calibrated

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