Microwave responder
US5119099A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 21, 1990 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | May 21, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q9/28
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A microwave responder resonates or does not resonate with a microwave transmitted from a radio transmitter, and radiates the resonated microwave as a response signal wave. Two microstrip lines are linearly arranged to be separated from each other at a predetermined interval. A diode which is switched between ON and OFF states in response to the response signal is interposed between two end portions of the microstrip lines separated by the predetermined interval, and a distance, between distal ends of the two linearly arranged microstrip lines, which includes an impedance defined by the ON or OFF state of the diode is determined to be 1/2 a wavelength of the microwave.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.