US 11,942,685 B2
Communication device
Hideki Ueda, Nagaokakyo (JP); Yasuhisa Yamamoto, Nagaokakyo (JP); Masashi Omuro, Nagaokakyo (JP); Kazunari Kawahata, Nagaokakyo (JP); Satoshi Tanaka, Nagaokakyo (JP); and Ryuken Mizunuma, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Feb. 17, 2022, as Appl. No. 17/673,798.
Application 17/673,798 is a continuation of application No. PCT/JP2020/026727, filed on Jul. 8, 2020.
Claims priority of application No. 2019-149899 (JP), filed on Aug. 19, 2019.
Prior Publication US 2022/0173508 A1, Jun. 2, 2022
Int. Cl. H01Q 1/52 (2006.01); H01Q 5/307 (2015.01); H01Q 13/08 (2006.01)
CPC H01Q 1/523 (2013.01) [H01Q 5/307 (2015.01); H01Q 13/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A communication device comprising:
a first antenna having a first operating frequency;
a second antenna that is an array antenna including a plurality of radiating elements, the second antenna having a second operating frequency that is greater than the first operating frequency; and
a waveguide structure, wherein
the first antenna, the second antenna, and the waveguide structure are contained in a single housing, and
the waveguide structure is outside a range of a half-value angle of a main beam as viewed from the first antenna, includes a unit waveguide disposed in a path of a radio wave received by the second antenna, and is configured to attenuate a radio wave in the first operating frequency.