Title:
DUAL-BAND-CAPABLE ANTENNA DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/049553
Kind Code:
A1
Abstract:
In order to provide a dual-band-capable antenna device that serves as a broadband antenna in a high-frequency resonant operation and has a stable, excellent characteristic, this dual-band-capable antenna device is provided with a first branch electrode having a first electrode part connected to a shared electrode via a first adjustment element, and a second branch electrode having a second electrode part connected to the shared electrode via a second adjustment element, and is configured such that the first electrode part and the second electrode part have lengths at least equal to two thirds of the electric lengths of the first branch electrode and the second branch electrode, respectively, and are disposed in a straight line, wherein, when a low-frequency signal is supplied to the shared electrode, the amount of an electric current flowing through the first electrode part is larger than that of an electric current flowing through the second electrode part, and when a high-frequency signal is supplied to the shared electrode from a feeding point, the electric current flowing through the first electrode part and the electric current flowing through the second electrode part are in phase.
Inventors:
IZAWA MASAHIRO (JP)
Application Number:
PCT/JP2018/028561
Publication Date:
March 14, 2019
Filing Date:
July 31, 2018
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01Q5/321; H01Q5/371; H01Q9/16
Domestic Patent References:
| WO2005064743A1 | 2005-07-14 |
Foreign References:
| JP2005079959A | 2005-03-24 |
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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