GB691939A - Improvements in attenuators for use in connection with the transmission of electromagnetic waves through waveguides or the like - Google Patents
Improvements in attenuators for use in connection with the transmission of electromagnetic waves through waveguides or the likeInfo
- Publication number
- GB691939A GB691939A GB2379950A GB2379950A GB691939A GB 691939 A GB691939 A GB 691939A GB 2379950 A GB2379950 A GB 2379950A GB 2379950 A GB2379950 A GB 2379950A GB 691939 A GB691939 A GB 691939A
- Authority
- GB
- United Kingdom
- Prior art keywords
- attenuator
- wave
- absorbing surfaces
- sept
- guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/22—Attenuating devices
- H01P1/222—Waveguide attenuators
Landscapes
- Waveguide Connection Structure (AREA)
Abstract
691,939. Wave-guides. WHITEHEAD, E. A. N. Sept. 28, 1951 [Sept. 28, 1950], No. 23799/50. Class 40 (viii). [Also in Group XL (c)] A variable attenuator for a waveguide comprises two coaxially aligned contiguous lengths 1 and 2 of cylindrical wave-guide, which can be rotated relatively to each other about their common axis, and which contain one or more absorbing surfaces 1a and 2a which absorb substantially completely any wave energy which is electrically polarized in a predetermined direction. The absorbing surfaces may comprise graphite or very thin metal films on dielectric supports. Notches 3 may be cut in the absorbing surfaces to minimize reflections. A further length of guide 6 with an absorbing surface 6a may be fixed beyond the moving section 2 in order that the attenuator may emit waves of the same direction of polarization as those that it receives. Matching sections 1b and 6b are provided at the ends of the attenuator to connect it to rectangular guides and an indicator 5 may be secured to the middle section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2379950A GB691939A (en) | 1950-09-28 | 1950-09-28 | Improvements in attenuators for use in connection with the transmission of electromagnetic waves through waveguides or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2379950A GB691939A (en) | 1950-09-28 | 1950-09-28 | Improvements in attenuators for use in connection with the transmission of electromagnetic waves through waveguides or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB691939A true GB691939A (en) | 1953-05-27 |
Family
ID=10201506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2379950A Expired GB691939A (en) | 1950-09-28 | 1950-09-28 | Improvements in attenuators for use in connection with the transmission of electromagnetic waves through waveguides or the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB691939A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2922969A (en) * | 1956-07-25 | 1960-01-26 | Bell Telephone Labor Inc | Circular electric wave transmission |
| US2944234A (en) * | 1956-07-11 | 1960-07-05 | Philips Corp | Adjustable impedance for use in waveguides |
| US3114104A (en) * | 1959-01-12 | 1963-12-10 | Fleming Bernard | Microwave power determining apparatus using a resistive vane with electrical connections thereon for resistive measurement of the vane |
-
1950
- 1950-09-28 GB GB2379950A patent/GB691939A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2944234A (en) * | 1956-07-11 | 1960-07-05 | Philips Corp | Adjustable impedance for use in waveguides |
| US2922969A (en) * | 1956-07-25 | 1960-01-26 | Bell Telephone Labor Inc | Circular electric wave transmission |
| US3114104A (en) * | 1959-01-12 | 1963-12-10 | Fleming Bernard | Microwave power determining apparatus using a resistive vane with electrical connections thereon for resistive measurement of the vane |
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