US3597708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broadband radio frequency transmission line termination
Assignee: Raytheon Co
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Filing: 1969-12-31
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Granted: 1971-08-03
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Expires: 1989-12-31
Abstract
Abstract An electromagnetic energy termination device is provided with power absorbing means in a structure having plural reentrant electrical paths in series defined by concentric coaxial conductors within a substantially reduced mechanical configuration. Movement of a fluid dielectric medium within a fluidtight chamber is provided either in parallel or serially along the electrical paths to absorb high average and peak powers at ultrahigh radio frequencies over relatively wide bandwidths.
Inventors
- 👤 Henry W Perreault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:02
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/24; H01P1/26; H01P1/262
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
A radio frequency transmission line termination device comprising: means defining a transmission line section adapted for mating with a main transmission line system; at least one concentrically disposed conductive member defining within said section a plurality of alternately short-circuited coaxial reentrant electrical paths having a total overall distance electrically equivalent to a device of a substantially longer overall length; means defining a fluidtight chamber within said section; and means for circulating an electromagnetic energy absorbing medium along said electrical paths.
Claim 2
Dependent Claim
80 words
A radio frequency transmission line termination device comprising: means defining a transmission line section adapted for mating with a main transmission line system; at least one concentrically disposed conductive member defining within said section a plurality of alternately short-circuited coaxial reentrant electrical paths having a total overall distance electrically equivalent to a device of a substantially longer overall length; means defining a fluidtight chamber within said section; and means for circulating an electromagnetic energy absorbing medium along said electrical paths.
Claim 3
Dependent Claim
22 words
A radio frequency transmission line termination device according to claim 1 wherein said fluidtight chamber is defined by a hollow dielectric member.
Claim 4
Dependent Claim
27 words
A radio frequency transmission line termination device according to claim 1 wherein said fluidtight chamber is defined by an energy-permeable member disposed within said transmission line section.
Claim 5
Dependent Claim
23 words
A radio frequency transmission line termination device according to claim 1 wherein said fluidtight chamber is defined by a hollow tapered dielectric member.
Claim 6
Dependent Claim
33 words
A radio frequency transmission line termination device according to claim 1 wherein said transmission line system is of a coaxial waveguide configuration and said fluidtight chamber is defined by an annular dielectric member.
Claim 7
Dependent Claim
25 words
A radio frequency transmission line termination device according to claim 1 wherein movement of said energy-absorbing medium is in series relative to said electrical paths.
Claim 8
Dependent Claim
24 words
A radio frequency transmission line termination device according to claim 1 wherein movement of said energy-absorbing medium is parallel relative to said electric paths.
Claim 9
Dependent Claim
92 words
A radio frequency transmission line termination device comprising: means defining a transmission line section adapted for mating with a main transmission line system having a predetermined operating frequency; concentrically disposed conductors defining within said section an arrangement of a first transmission path and at least one additional coaxial reentrant path all electrically in series to provide a total distance electrically equivalent to a greater number of wavelengths of said operating frequency relative to a device having approximately the same overall length; and an electromagnetic energy absorbing medium substantially filling all said paths.
Claim 10
Dependent Claim
92 words
A radio frequency transmission line termination device comprising: means defining a transmission line section adapted for mating with a main transmission line system having a predetermined operating frequency; concentrically disposed conductors defining within said section an arrangement of a first transmission path and at least one additional coaxial reentrant path all electrically in series to provide a total distance electrically equivalent to a greater number of wavelengths of said operating frequency relative to a device having approximately the same overall length; and an electromagnetic energy absorbing medium substantially filling all said paths.
Claim 11
Dependent Claim
26 words
A radio frequency transmission line termination device according to claim 8 wherein said first transmission path is centrally disposed with respect to the additional reentrant paths.
Claim 12
Dependent Claim
28 words
A radio frequency transmission line termination device according to claim 8 wherein said first transmission path comprises the outermost member of the arrangement of concentrically disposed electrical paths.
Claim 13
Dependent Claim
30 words
A radio frequency transmission line termination device according to claim 8 and means for matching the electrical impedance of said main transmission line system to said transmission line section conductors.
Claim 14
Dependent Claim
32 words
A radio frequency transmission line terminAtion device according to claim 8 and means for matching the electrical impedance of said main transmission line system to the impedance characteristics of said energy-absorbing medium.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |