Antenna device and communication apparatus
US6384786B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2001 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Jan 11, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/30
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A patch type radiation electrode is formed in the central area of the upper face of a dielectric substrate. First and second microstrip type radiation electrodes are formed on respective right and left sides of the patch type radiation electrode so as to sandwich the patch type radiation electrode. The first and second microstrip type radiation electrodes are symmetrical with respect to the patch type radiation electrode. If a microstrip type radiation electrode is formed on either one of the right and left sides of the patch type radiation electrode, the directivity of radio waves of the patch type radiation electrode become unsymmetrical, due to effects of the microstrip type radiation electrode. On the other hand, the directivity of radio waves of the patch type radiation electrode can be made symmetrical by forming the microstrip type radiation electrodes on both of the right and left sides of the patch type radiation electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.