Title:
COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/033448
Kind Code:
A1
Abstract:
A first antenna, a second antenna, and a waveguide tube structure are accommodated in the same housing. The operating frequency of the second antenna is higher than the operating frequency of the first antenna. The second antenna is an array antenna including a plurality of radiating elements. The waveguide tube structure includes unit waveguide tubes disposed outside the range of the half-value angle of a main beam as seen from the first antenna, on the pathway of radio waves received by the second antenna, and attenuates radio waves at the operating frequency of the first antenna more than radio waves at the operating frequency of the second antenna.
Inventors:
UEDA HIDEKI (JP)
YAMAMOTO YASUHISA (JP)
OMURO MASASHI (JP)
KAWAHATA KAZUNARI (JP)
TANAKA SATOSHI (JP)
MIZUNUMA RYUKEN (JP)
YAMAMOTO YASUHISA (JP)
OMURO MASASHI (JP)
KAWAHATA KAZUNARI (JP)
TANAKA SATOSHI (JP)
MIZUNUMA RYUKEN (JP)
Application Number:
PCT/JP2020/026727
Publication Date:
February 25, 2021
Filing Date:
July 08, 2020
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01Q1/52; H01Q21/06; H01Q21/28
Domestic Patent References:
| WO2019054094A1 | 2019-03-21 | |||
| WO2018076491A1 | 2018-05-03 | |||
| WO2018115372A1 | 2018-06-28 |
Foreign References:
| CN205900780U | 2017-01-18 | |||
| JP2005505963A | 2005-02-24 |
Attorney, Agent or Firm:
KITAYAMA, Mikio et al. (JP)
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