| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna device which has two pattern antennas disposed in parallel are satisfactorily isolated, whose size can be easily reduced, and whose wiring for connecting to a high-frequency circuit portion is not complicated. SOLUTION: The antenna device 1 includes the two pattern antennas 4 and 8 having substantially line symmetrical shapes on a surface of a dielectric substrate 2 in a region close to a ground conductor layer 3. The pattern antennas 4 and 8 include radiation elements 5 and 9 having feeding link portions 5a and 9a, mutual link portions 5d and 9d, etc, respectively, and a feeding element to which power is supplied from the high-frequency circuit portion. Open ends 5e and 9e of the radiation elements 5 and 9 are disposed close to the ground conductor layer 3. The feeding element and the feeding link portions 5a and 9a are capacitively coupled together so that the radiation elements 5 and 9 are excited. During the excitation, the mutual link portions 5d and 9d adjacent to each other and extending substantially parallel to each other are capacitively coupled together, whereby the polarization planes of electric fields radiated from the radiation elements 5 and 9 can be caused to be substantially orthogonal to each other. COPYRIGHT: (C)2011,JPO&INPIT
|
