End launched microstrip or stripline to waveguide transition with cavity backed slot fed by T-shaped microstrip line or stripline usable in a missile
US5726664A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 1994 |
| Grant date | Mar 10, 1998 |
| Priority date | — |
| Expiry date | May 23, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P5/107
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A low profile, compact microstrip-to-waveguide or stripline-to-waveguide transition. The end of the waveguide is terminated in a cavity backed slot defined in a groundplane formed on a dielectric substrate. The slot is excited by a microstrip or stripline conductor defined on the opposite side of the substrate. The conductor is terminated in a T-shaped junction including two opposed arms extending along the slot, each having a length equal to one-quarter wavelength at the center frequency of operation. A cavity covers the substrate on the conductor side, and is sized so that no cavity modes resonate in the frequency band of operation. The transition is matched by appropriate selection of the length of the slot and the length and position of the microstrip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.