Modulated backscatter microstrip patch antenna
US5825329A · kind A · utility
37Cited by
24References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Jul 23, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/293
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention provides a microstrip patch antenna for emitting backscatter-modulated signals in response to a received signal. The antenna has two segments that are connected together by a switch. When the switch is ON, the antenna is a full wave length antenna with its two segments out-of-phase with each other, thus producing minimal backscatter. When the switch is OFF, the two segments of the antenna act in concert with each other to produce a backscatter-modulated signal. Multiple pairs of such antennas can be connected together to make a single antenna with increased signal power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.