US4286240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circular electric mode microwave window
Assignee: Communications and Power Industries LLC
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Filing: 1979-12-03
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Granted: 1981-08-25
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Expires: 1999-12-03
Abstract
Abstract For conducting very high microwave power at very high frequencies, circular waveguide transmitting a circular-electric-field mode is used. The vacuum-tight window of an electron tube is often the element with lowest power-handling capability. The inventive window has two dielectric plates with a space between them. There is a gap in the waveguide inner wall through which a dielectric fluid is circulated between the plates to cool them. The gap leads to a region containing wave-absorbing material such as water to absorb modes other than the circular-electric-field mode.
Inventors
- 👤 James F. Shively
- 👤 Steven J. Evans
- 👤 Howard R. Jory
- 👤 Yosuke M. Mizuhara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:00
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
90 words
A window assembly for waveguide of circular and hollow cross section and having an inner conducting wall in which an axial gap is defined, comprising: two dielectric plates extending across said section of said waveguide, sealed to said waveguide on opposing sides of said gap; means for circulating a fluid coolant through said gap and between said plates; means external to said waveguide for containing waveabsorbing material; and means extending outward from said inner conducting wall for connecting said gap in wavetransmitting relation with said means for containing waveabsorbing material.
Claim 2
Dependent Claim
90 words
A window assembly for waveguide of circular and hollow cross section and having an inner conducting wall in which an axial gap is defined, comprising: two dielectric plates extending across said section of said waveguide, sealed to said waveguide on opposing sides of said gap; means for circulating a fluid coolant through said gap and between said plates; means external to said waveguide for containing waveabsorbing material; and means extending outward from said inner conducting wall for connecting said gap in wavetransmitting relation with said means for containing waveabsorbing material.
Claim 3
Dependent Claim
24 words
The window assembly of claim 1 wherein said waveabsorbing material is a dielectric liquid and said containing means includes means for circulating said liquid.
Claim 4
Dependent Claim
14 words
The window assembly of claim 1 wherein said waveabsorbing material is a solid dielectric.
Claim 5
Dependent Claim
17 words
The window assembly of claim 3 further including means for circulating said fluid coolant past said dielectric.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |