Transmitting/receiving antenna, isolator, high-frequency oscillator, and high-frequency transmitter-receiver using the same
US7602333B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2005 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Apr 16, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/03
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A millimeter-wave transmitter-receiver uses an NRD guide as a fundamental configuration and includes a millimeter-wave signal oscillator, a pulse modulator, a circulator, an antenna and a mixer. In the millimeter-wave transmitter-receiver, a line length of a third dielectric guide is set so that δ=±π in which δ is a phase difference at a center frequency between a portion of a transmission millimeter-wave signal, which is reflected via a third dielectric guide on the leading end portion of the third dielectric guide and returned to leak to a third connecting portion of the circulator, and another portion of the millimeter-wave signal, which leaks from a first connecting portion to the third connecting portion of the circulator. It is possible to reduce the change in the mixer output and enhance the millimeter-wave transmission/reception performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.