Branched waveguide transitions with mode filters
Abstract
Abstract AN INPUT WAVEGUIDE FOR FEEDING MICROWAVE ENERGY IN THE TE01 MODE SUBSTANTIALLY UNCONTAMINATED BY HIGHER ORDER MODES INTO A RECTANGULAR WAVEGUIDE THAT IS USED FOR HEATING RELATIVELY WIDE WEBS AND THUS REQUIRES A WIDTH IN WHICH THE HIGHER ORDER MODES COULD PROPAGATE, IS COMPOSED OF A PLURALITY OF DIVERGENT WAVEGUIDE SECTIONS EACH DIVERGING TO A WIDTH TOO SMALL TO PROPAGATE THE HIGHER MODES BUT EACH NEVERTHELESS CONTAINING INCIPIENT SUCH MODES BY REASON OF THE EFFECT OF THE DIVERGENCE, SUCH DIVERGENT SECTIONS BEING FOLLOWED BY PARALLEL-SIDED FILTER SECTIONS FOR DAMPING OUT THE INCIPIENT HIGHER MODES BEFORE THE PLURALITY OF ENERGY PATHS THUS FORMED ARE RECOMBINED TO FORM A SINGLE TE01 MODE IN THE WIDE WAVEGUIDE.
Inventors
- 👤 William A Cumming
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |