Title:
CALIBRATION CIRCUIT, REMOTE UNIT DEVICE, WIRELESS BASE STATION SYSTEM, AND CALIBRATION METHOD
Document Type and Number:
Japanese Patent JP2022019087
Kind Code:
A
Abstract:
To provide a calibration circuit capable of performing phase calibration of a plurality of antenna units without using an external measuring instrument.SOLUTION: A calibration circuit 2 according to the present disclosure in a wireless base station system 1 including a remote unit 10, and a plurality of distributed antenna units 20 connected to the remote unit 10 via a plurality of cables includes a detection unit 2a that detects a plurality of local oscillation signals output from a local oscillator 13 of the remote unit 10 and reflected from the plurality of distributed antenna units 20 via the plurality of cables, and a phase adjustment unit 2b that adjusts the phase of the plurality of local oscillation signals output from the remote unit 10 via the plurality of cables, respectively, on the basis of the detected result.SELECTED DRAWING: Figure 1
Inventors:
TAWA NORIAKI
Application Number:
JP2020122667A
Publication Date:
January 27, 2022
Filing Date:
July 17, 2020
Export Citation:
Assignee:
NEC CORP
International Classes:
H04B7/06; H01Q3/30; H01Q21/06; H04B7/08; H04B17/12
Attorney, Agent or Firm:
Ken Ieiri