Multiband flat panel antenna providing automatic routing between a plurality of antenna elements and an input/output port
US6307525A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2001 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Feb 21, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/30
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmit/receive antenna selectively operates to transmit or receive at one or more of a plurality of different frequencies in the MHz range. A planar transmission line diplexer or multiplexer that is selected from the group microstrip multiplexer diplexer/multiplexer and stripline diplexer/multiplexer connects an input/output port to a plurality of antenna ports that are physically spaced from each other and from the input/output port. One antenna element is connected to each of the antenna ports. The transmission line diplexer/multiplexer includes a plurality of individual microstrip/stripline elements that have a characteristic impedance and a length that are selected such that the transmission line diplexer/multiplexer automatically provides a matched impedance path between a given antenna element and the input/output port when an antenna-matching frequency is received by the given antenna element or when the antenna matching frequency is applied to the input/output port. At the same time, the transmission line diplexer/multiplexer automatically provides a very mismatched impedance path between all others of the antenna elements and the input/output port.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.