US 12,080,961 B2
Antenna device
Youhei Sekiya, Nisshin (JP); Yuzi Sugimoto, Nisshin (JP); Masakazu Ikeda, Nisshin (JP); Yuuji Kakuya, Nisshin (JP); Ryuichi Arai, Kariya (JP); Shirou Koide, Kariya (JP); Takuya Yamashita, Kariya (JP); and Hiroyuki Izumi, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Nov. 7, 2022, as Appl. No. 17/982,254.
Application 17/982,254 is a continuation of application No. PCT/JP2021/018111, filed on May 12, 2021.
Claims priority of application No. 2020-086016 (JP), filed on May 15, 2020.
Prior Publication US 2023/0066781 A1, Mar. 2, 2023
Int. Cl. H01Q 9/04 (2006.01); H01Q 21/06 (2006.01); H01Q 21/28 (2006.01)
CPC H01Q 9/0442 (2013.01) [H01Q 9/045 (2013.01); H01Q 21/065 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An antenna device for a mobile body, comprising:
a first antenna having a directional gain at a low elevation angle higher than the directional gain at a high elevation angle;
a second antenna having the directional gain at the high elevation angle higher than the first antenna, transmitting and receiving a radio wave having a vibration direction of an electric field intersecting with a radio wave transmitted and received by the first antenna, and communicable with a base station when the base station is disposed at the low elevation angle; and
a third antenna having the directional gain at the high elevation angle higher than the first antenna, and transmitting and receiving a radio wave having a vibration direction of an electric field intersecting with the radio wave transmitted and received by the second antenna, wherein:
the first antenna is an antenna that transmits and receives a vertically polarized wave and has a lower directivity gain in a vertical direction than a horizontal direction;
the third antenna is a patch antenna;
the first antenna is a zeroth order resonant antenna having a flat plate-shaped conductor plate, a ground parallel to the conductor plate, and a short-circuit pin connecting the conductor plate and the ground;
the zeroth order resonant antenna is arranged on a same layer as the patch antenna;
the zeroth order resonant antenna includes a plurality of zeroth order resonant antenna elements; and
the patch antenna is arranged on a same substrate as the plurality of zeroth order resonant antenna elements and is arranged at a position sandwiched between the plurality of zeroth order resonant antenna elements.