Patent ID: 11862858
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Telecommunications (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 11:
12. A non-transitory computer-readable storage medium storing a polarization direction measuring program for measuring a polarization direction of a received wave, the arrival direction of the received wave being defined by an AZ angle and an EL angle, the polarization direction measuring program, when executed by a computer of the polarization direction measuring device according to claim 1, causing the polarization direction measuring device to:
receive the received wave with the plurality of circularly polarized antennas;
detect a third intensity ratio between two of the circularly polarized antennas of the received wave to be received at the plurality of circularly polarized antennas;
acquire an arrival direction of the received wave;
acquire a first intensity ratio of a vertically polarized component of the received wave from the first intensity ratio table stored in the storage unit based on the acquired arrival direction of the received wave;
acquire a second intensity ratio of a horizontally polarized component of the received wave from the second intensity ratio table stored in the storage unit based on the acquired arrival direction of the received wave; and
calculate the polarization direction of the received wave as a ratio of the horizontally polarized component and a ratio of the vertically polarized component, wherein the ratio of the horizontally polarized component is determined with expression (1) and the ratio of the vertically polarized component is determined with expression (2):

PH=(M−TV)/(TH−TV)  (1)

PV=1−PH  (2)

wherein: PH is the ratio of the horizontally polarized component,
PV is the ratio of the vertically polarized component,
TV is the first intensity ratio,
TH is the second intensity ratio, and
M is the third intensity ratio

wherein the polarization direction measuring program further causes the polarization direction measuring device to calculate polarization direction of the received wave from the predetermined calculation expression based on the intensity ratio of the received wave acquired by the detector, the intensity ratio of the vertically polarized component of the received wave, and the intensity ratio of the horizontally polarized component of the received wave.