Planar helix antenna with two frequencies
US6421015B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 2, 2001 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Jan 2, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q5/357
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A planar helix antenna with two frequencies, comprising a circuit board with suitable area and thickness and an upper and a bottom surface on which several microstrip antenna sections are disposed in a an inclined and mutually spaced way, wherein, through holes are provided on the circuit board for conjunction ends of the antenna sections on the upper and bottom surfaces for electric connection to form a planar helix microstrip antenna; the top most end of the antenna sections has top loading, while the bottom end thereof is an out feeding point. The antenna sections get a high frequency harmonic oscillation point by coupling; while connection of these microstrip antenna sections on the front and the back sides can form by its electrical gross length a low frequency harmonic oscillation point. Such variation of space and top loading of the microstrip antenna sections can endue the dual frequency planar and miniaturized helix microstrip antenna with superior performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.