Patent ID: 11949165
Assignee: NEC CORPORATION
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. A communication method comprising:
a step of performing one of transmission and reception by using a first directional antenna provided with a first feeding point and a second directional antenna provided with a second feeding point;
a step of performing another one of transmission and reception by using a third directional antenna provided with a third feeding point and a fourth directional antenna provided with a fourth feeding point; and
wherein the first directional antenna and the second directional antenna transmit and receive a signal with a first polarization,
the third directional antenna and the fourth directional antenna transmit and receive a signal with a second polarization orthogonal to the first polarization,
the first directional antenna is oriented in a first direction,
the second directional antenna is oriented in a second direction opposite to the first direction,
the third directional antenna is oriented in a third direction obtained by horizontally rotating the second direction by 90° or 180°,
the fourth directional antenna is oriented in a fourth direction opposite to the third direction,
the first feeding point and the second feeding point are placed in phase with each other,
the third feeding point and the fourth feeding point are placed in opposite phase to each other,
the first directional antenna, the second directional antenna, the third directional antenna, and the fourth directional antenna are patch antennas,
the first feeding point and the second feeding point are placed so as to overlap each other when viewed in a plan view from an antenna surface side of the first directional antenna,
the third feeding point and the fourth feeding point are placed so as to overlap each other when viewed in a plan view from an antenna surface side of the third directional antenna,
the first directional antenna and the second directional antenna are placed opposite to each other and facing in opposite directions, and
the third directional antenna and the fourth directional antenna are placed opposite to each other and facing in opposite directions,
the method further includes a step of combining a received signal received by the third directional antenna and a received signal received by the fourth directional antenna in opposite phases.