Title:
ANTENNA DEVICE AND INVERTED F ANTENNA
Document Type and Number:
Japanese Patent JP2019047265
Kind Code:
A
Abstract:
To provide a compact low-in-height antenna that enables stable signal transmission and reception with low VSWR over a wide frequency band.SOLUTION: An inverted F antenna is composed of a flat part 11 parallel to a ground plane; a power supply part 12 disposed on a plane making an angle of about 90 degrees with the ground plane; short-circuit parts 15-17, and a first switching circuit 18. The power supply part 12 includes a proximity side coming close to the flat part 11, and other sides have a fin shape. The flat part 11 and power supply part 12 have physically separated plate shapes with mutually different shapes and electrically connected at a prescribed frequency or lower. The first switching circuit 18 selectively grounds any of the short-circuit parts 15-17.SELECTED DRAWING: Figure 1
Inventors:
YAMADA KENICHI
SANBO TAKESHI
SANBO TAKESHI
Application Number:
JP2017167153A
Publication Date:
March 22, 2019
Filing Date:
August 31, 2017
Export Citation:
Assignee:
YOKOWO SEISAKUSHO KK
International Classes:
H01Q13/08; H01Q1/50; H01Q5/328; H01Q5/364; H01Q9/14
Attorney, Agent or Firm:
Masatake Suzuki