RADAR TRANSMISSION BEAM CALIBRATION DEVICE, PROGRAM, AND METHOD

To simplify a radar device without providing a special mechanism in each antenna element phase shifter of a transmitting and receiving antenna and without a device for monitoring a phase characteristic change due to temporal change or temperature change, and to perform radar measurement constantly by measuring the amount of precipitation and the like by a meteorological radar while calibrating each antenna element phase shifter of the transmitting and receiving antenna.SOLUTION: A radar transmission beam calibration device 3 for calibrating a transmission beam direction in a phased array radar which performs electronic scanning in a beam direction comprises: a radio wave receiving unit 31 which receives a reflected or scattered radio wave by a reception beam having a narrower beam width than a transmission beam after a radio wave is transmitted by a transmission beam having a wider beam width than a reception beam; and a transmission beam calibration unit 32 which calculates a calibration width in a transmission beam direction so as to reduce a discontinuous width dependent on a reception power beam direction near a switching beam direction of a transmission beam.SELECTED DRAWING: Figure 1 【課題】送受信アンテナの各アンテナ素子の移相器に特別な機構を設けることなく、かつ、経時変化又は温度変化による位相特性変化をモニタする装置を不要として、レーダ装置を簡素化する。送受信アンテナの各アンテナ素子の移相器の校正を行ないつつも、気象レーダにおける降水量等の測定を行なうことにより、常時に渡ってレーダ測定を行なう。【解決手段】本開示は、ビーム方向の電子走査を行なうフェーズドアレイレーダにおいて、ビーム幅が受信ビームより広い送信ビームで電波が送信された後に、反射又は散乱された電波をビーム幅が送信ビームより狭い受信ビームで受信する電波受信部３１と、送信ビームの切り替わりのビーム方向付近における受信電力のビーム方向依存性の不連続幅が低減されるように、送信ビーム方向の校正幅を算出する送信ビーム校正部３２と、を備える送信ビーム校正装置３である。【選択図】図１