Patent ID: 6031494
Filing Date: 2000-02-29
Classification: H01Q,H04B

Abstract:
A handy-phone comprising:a low-frequency printed wiring board on which low-frequency circuit elements are mounted,a high-frequency printed wiring board on which high-frequency circuit elements are mounted,a case containing at least the low-frequency printed wiring board and the high-frequency printed wiring board,a directional planar antenna radiating an electromagnetic wave, anda shielding case for shielding electromagnetically the high-frequency circuit elements;wherein said planar antenna is mounted on a portion of the high-frequency printed wiring board,wherein said shielding case covers the high-frequency printed wiring board with a surface of the portion exposed, andwherein said shielding case has a maximum straight length in the direction of main polarization of the planar antenna which is in a range of half of a wavelength of the electromagnetic wave plus 1/20 of the wavelength and half the wavelength minus 1/20 of the wavelength.