To attain a good conjugate matching between a planar antenna and a tag chip by optimal design of the height and the width of a fractal dipole antenna, and to achieve miniaturization.
The planar antenna receives or transmits an electromagnetic signal for a radio frequency identification (RFID) tag. The planar antenna includes a dielectric slab and a fractal dipole antenna. The height of the fractal dipole antenna is 0.3 to 0.7 times of the half wavelength of the electromagnetic signal, and the width of the fractal dipole antenna is 0.7 to 1.1 times of the half wavelength of the electromagnetic signal. The planar antenna achieves the good conjugate matching and device miniaturization (microfabrication) between the planar antenna and the tag chip by utilizing the optimal size of the fractal dipole antenna.
| WO/2005/107008 | APERTURE ANTENNA ELEMENT |
| JP6678617 | Circularly polarized antenna |
| WO/2019/088738 | MILLIMETER-WAVE DUAL-BAND ANTENNA AND ELECTRONIC DEVICE COMPRISING SAME |
ZHAN JING-QING
Kosaku Sugimura
Kiyoshi Kuruma
Shiro Fujitani
Tatsuya Sawada
Eiji Fujiwara