Adaptive multifilar antenna
US7034773B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 1999 |
| Grant date | Apr 25, 2006 |
| Priority date | — |
| Expiry date | Feb 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q11/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multifilar antenna (200) comprises n spaced antenna filaments, where n is on integer greater than 1; a matching circuit (210) for matching the characteristic impedance of the antenna to that of a transmitting and/or receiving apparatus; a weighting circuit (240) for applying respective gain and phase adjustments to signals passed to or from the n filaments; switch means (310) associated with each filament for selectively altering the electrical length and/or interconnections of the filaments; means for detecting electrical properties of the multifilar antenna with respect to the frequency, polarisation and/or direction of propagation of a signal to be received or transmitted by the multifilar antenna and/or impedance matching of the antenna; and control means (230), responsive to the detective means, for controlling the operation of the matching circuit (210), the weighting circuit (240) and the switch means (310) to adjust the properties of the multifilar antenna (200) to suit better a current signal to be received or transmitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.