Title:
RADIO ANTENNA, AND RADIO COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JP2023053664
Kind Code:
A
Abstract:
To provide a radio antenna capable of forming a service area simply and at low costs and further capable of setting transmission/reception directions of electromagnetic waves.SOLUTION: A radio antenna 100 includes a cable-like waveguide 110 formed using a dielectric substance and an antenna function unit 120. The dielectric constant of the waveguide 110 is larger than the dielectric constant of the periphery of the waveguide 110 excluding the antenna function unit 120. The antenna function unit 120 includes M (M≥1) mass bodies 110c formed using a dielectric substance. Each of the M mass bodies 110c is positioned on the waveguide 110 or in the vicinity of the waveguide 110. An angle γ formed by a longer direction of a single mass body 110c and a longer direction of the waveguide 110 in the case of M=1 or an angle γ formed by a direction in which the M mass bodies 110c are arranged and the longer direction of the waveguide 110 in the case of M≥2 is larger than 0 degrees and smaller than 90 degrees.SELECTED DRAWING: Figure 3
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Inventors:
FUKUDA ATSUSHI
OKAZAKI KOJI
SUZUKI YASUNORI
OKAZAKI KOJI
SUZUKI YASUNORI
Application Number:
JP2021162844A
Publication Date:
April 13, 2023
Filing Date:
October 01, 2021
Export Citation:
Assignee:
NTT DOCOMO INC
International Classes:
H01Q13/24; H01Q1/22; H01Q21/20
Attorney, Agent or Firm:
Naoki Nakao
Yukio Nakamura
Munehiro Yoshimura
Yukio Nakamura
Munehiro Yoshimura