Coaxial line microwave heating applicator with asymmetrical radiation pattern
US4743725A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 8, 1986 |
| Grant date | May 10, 1988 |
| Priority date | — |
| Expiry date | Dec 8, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2206/046
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A microwave heating applicator usable in preformed holes in mansonry and the like for heating and dehumidifying areas around the holes is formed from a length of coaxial transmission line. Radiating elements are formed in the outer conductor of the coaxial line for providing an asymmetrical radiation pattern. The radiating elements are provided by forming circumferential axial discontinuities in the outer conductor, each discontinunity having a pair of non-parallel cut edges formed in the outer conductor encircling the line, leaving an asymmetrical open area extending axially between the cut edges. One of the cut edges may describe a plane perpendicular to the coaxial line's z axis while the other cut edge describes a plane which is not perpendicular to the coaxial line z axis. The radiating elements may be provided at intervals along the coaxial line. An end radiating element may be formed having only one edge cut in the outer conductor, the element being bounded by the remote end of the coaxial line with the outer conductor removed therebetween. A flattened radiation pattern may be obtained by orienting adjacent radiating elements with their respective radiating asymmetries angul…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.