Title:
RETROREFLECTIVE ANTENNA, AND OBJECT DETECTING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/034280
Kind Code:
A1
Abstract:
A retroreflective antenna according to an embodiment comprises an antenna main body for retroreflecting incoming radio waves, and a passive notch filter, wherein: the antenna main body includes a plurality of pairs of antenna elements, and a plurality of transmission lines provided corresponding to the plurality of pairs of antenna elements; each pair of antenna elements of the plurality of pairs of antenna elements is disposed with point symmetry about a reference point in the antenna main body; each of the plurality of transmission lines connects the corresponding pair of antenna elements, among the plurality of pairs of antenna elements; electrical lengths of the plurality of transmission lines are the same; and the passive notch filter is provided in at least one transmission line among the plurality of transmission lines.
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Inventors:
YOSHIDA KYOHIRO (JP)
MOCHIDA EIJI (JP)
MOCHIDA EIJI (JP)
Application Number:
PCT/JP2023/023792
Publication Date:
February 15, 2024
Filing Date:
June 27, 2023
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
H01Q3/26; G01S13/82
Foreign References:
| US3731313A | 1973-05-01 | |||
| JPH07198838A | 1995-08-01 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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