Claims
- 1. A microwave heating apparatus comprising:
- a substantially rectangular conductive enclosure having an aperture in a wall thereof;
- a source of microwave energy outside said enclosure;
- a primary radiating structure having a chamber formed by spaced first and second surfaces, said first surface having a hole therein, said structure being supported in said enclosure by a conductive rod extending into said enclosure through said aperture, said rod extending through said hole and contacting said second surface for supporting said structure;
- a conductive cylinder positioned concentric with said rod and extending from said aperture into said chamber for providing a coaxial transmission line in combination with said rod for coupling said microwave energy to said chamber;
- means for rotating said primary radiating structure about the axis of said rod;
- and said primary radiating structure comprising a plurality of radiators for radiating simultaneous beams of said microwave energy, said beams having differently oriented polarization vectors in a plane substantially perpendicular to said axis.
- 2. The apparatus recited in claim 1 wherein said chamber comprises a plurality of waveguides extending radially from said axis to slot antennas in said second surface.
- 3. The apparatus recited in claim 2 wherein said slots are positioned at different distances from said axis.
- 4. The apparatus recited in claim 1 wherein three simultaneous beams are radiated.
- 5. The apparatus recited in claim 4 wherein said beams have polarization vectors differing by 120.degree. from each other.
- 6. The apparatus recited in claim 1 wherein said rotating means comprises a motor for rotating said rod.
- 7. A microwave heating apparatus comprising:
- a substantially rectangular conductive enclosure having an aperture in a wall thereof;
- a source of microwave energy outside said enclosure;
- a primary radiating structure having a chamber formed by a disc having slots therein and a dish having at least a portion spaced from said disc, said portion having a hole therein, said structure being positioned in said enclosure;
- a conductive rod extending into said enclosure through said aperture, said rod extending through said hole and contacting said disc on the opposite side of said chamber for supporting said radiating structure;
- a conductive cylinder positioned concentric with said rod and extending from said aperture into said chamber through said hole for providing a coaxial transmission line in combination with said rod for coupling said microwave energy to said chamber ;
- means for rotating said primary radiating structure about the axis of said rod; and
- said primary radiating structure radiating a plurality of simultaneous beams of said microwave energy through said slots, said beams having differently oriented polarization vectors in a plane substantially perpendicular to said axis.
- 8. The microwave heating apparatus recited in claim 7 wherein said slots are different distances from said axis.
- 9. The apparatus recited in claim 7 wherein said rotating means comprises a motor coupled to said rod.
- 10. The apparatus recited in claim 7 wherein there are three slots.
- 11. The apparatus recited in claim 10 wherein said slots are approximately 120.degree. in orientation from the other slots.
CROSS-REFERENCE TO RELATED CASES
This is a continuation of application Ser. No. 847,863, filed Nov. 2, 1977 now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (3)
Number |
Date |
Country |
676266 |
Jun 1966 |
BEX |
2622173 |
Dec 1976 |
DEX |
52-58143 |
May 1977 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
847863 |
Nov 1977 |
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