Title:
COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/228705
Kind Code:
A1
Abstract:
The present technology relates to a communication device that enables a stable communication even with an antenna having an electrically reduced size. This communication device comprises: a circular polarized antenna that is composed of a first antenna element and a second antenna element disposed orthogonal to the first antenna element; and a phase shifter that is composed of a capacitor connected to the first antenna element and an inductor connected to the second antenna element. The impedance of the antenna is expressed by R + jX, the capacitance of the capacitor is a value calculated from C = 1/\{πf(R + X)\}, and the inductance of the inductor is a value calculated from L = (R – X)/(4πf), where R is resistance, j is imaginary unit, X is reactance, f is the center frequency of the antenna, C is capacitance, and L is inductance. The present technology can be applied, for example, to a communication device installed in seawater.
Inventors:
KAWAMURA TAKASHI (JP)
MATSUI YASUHIRO (JP)
MATSUSHITA TAKUMA (JP)
HONGO KAZUHIRO (JP)
KONDO TOSHINORI (JP)
TAKEUCHI FUTOSHI (JP)
MATSUI YASUHIRO (JP)
MATSUSHITA TAKUMA (JP)
HONGO KAZUHIRO (JP)
KONDO TOSHINORI (JP)
TAKEUCHI FUTOSHI (JP)
Application Number:
PCT/JP2023/017236
Publication Date:
November 30, 2023
Filing Date:
May 08, 2023
Export Citation:
Assignee:
SONY GROUP CORP (JP)
International Classes:
H01Q1/50; H01P1/17; H01P5/10; H01Q9/16; H01Q9/30; H01Q9/44; H01Q13/08; H01Q21/24
Foreign References:
| JPH10224145A | 1998-08-21 | |||
| JP2014049785A | 2014-03-17 | |||
| JP2005101761A | 2005-04-14 | |||
| JP2002208808A | 2002-07-26 |
Other References:
B.M. SCHIFFMAN: "A New Class of Broad-Band Microwave 90-Degree Phase Shifters", IRE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, IEEE, USA, vol. 6, no. 2, 1 April 1958 (1958-04-01), USA , pages 232 - 237, XP011219002, ISSN: 0097-2002, DOI: 10.1109/TMTT.1958.1124543
Attorney, Agent or Firm:
NISHIKAWA Takashi et al. (JP)
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