High-frequency transmitting/receiving apparatus, radar system having the same, and vehicle and small boat equipped with the radar system
US7286080B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2004 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Jun 16, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/937
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Provided is a millimeter-wave transmitting/receiving apparatus of pulse-modulation type in which pulse-modulated millimeter-wave signals for transmission are prevented from being outputted to a reception system due to inner reflection or other causes. Included are: an NRD guide (basic structure) formed of a dielectric line sandwiched between parallel plate conductors; a millimeter-wave signal oscillator; a pulse modulator; a circulator; a transmitting/receiving antenna; and a mixer. At the output end of the mixer is disposed a switching device which interrupts intermediate-frequency signals in an opened state, and, when a millimeter-wave signal for transmission from the pulse modulator enters a non-output state and the condition is stabilized, changes into a closed state to pass intermediate-frequency signals. The intermediate-frequency signal containing noise resulting from the millimeter-wave signal for transmission entering the mixer can be prevented from leaking toward downstream side of the mixer; wherefore a desired intermediate-frequency signal can be outputted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.