GB576145A - An improved attenuator for guided electro-magnetic waves - Google Patents
An improved attenuator for guided electro-magnetic wavesInfo
- Publication number
- GB576145A GB576145A GB8053/44A GB805344A GB576145A GB 576145 A GB576145 A GB 576145A GB 8053/44 A GB8053/44 A GB 8053/44A GB 805344 A GB805344 A GB 805344A GB 576145 A GB576145 A GB 576145A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- guide
- attenuator
- attenuation
- section
- 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
Landscapes
- Non-Reversible Transmitting Devices (AREA)
Abstract
576,145. Wave guides. WESTERN ELECTRIC CO., Inc. April 28, 1944, No. 8053. Convention date, May 7, 1943. [Class 40 (v)] An attenuator for electromagnetic waves comprises a metallic wave guide section 1 and a resistive septum or plate 2 longitudinally positioned therein and spaced therefrom a distance such as to afford the desired attenuation to waves flowing in the section. The plate 2, of phenol fibre coated on the face next to the guide with a resistive material such as finely divided graphite, is fixed by an insulating screw 8 to an insulating rod 7 which passes through the guide and is axially movable by means of rack 12 and pinion 13 rotated by a knob 19 having a calibration scale 18 and fixed index 21. The ends of plate 2 are notched at 24, 25, Fig. 3, to reduce end reflection, and a shaped central aperture 26 is provided to reduce the variation of attenuation with frequency.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US576145XA | 1943-05-07 | 1943-05-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB576145A true GB576145A (en) | 1946-03-20 |
Family
ID=22011689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8053/44A Expired GB576145A (en) | 1943-05-07 | 1944-04-28 | An improved attenuator for guided electro-magnetic waves |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR927268A (en) |
| GB (1) | GB576145A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2578249A (en) * | 1946-12-04 | 1951-12-11 | Polytechnic Inst Brooklyn | Variable attenuator with linear drive |
| US2683255A (en) * | 1950-05-16 | 1954-07-06 | Bell Telephone Labor Inc | Switch attenuator for wave guides |
-
1944
- 1944-04-28 GB GB8053/44A patent/GB576145A/en not_active Expired
-
1946
- 1946-05-23 FR FR927268D patent/FR927268A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2578249A (en) * | 1946-12-04 | 1951-12-11 | Polytechnic Inst Brooklyn | Variable attenuator with linear drive |
| US2683255A (en) * | 1950-05-16 | 1954-07-06 | Bell Telephone Labor Inc | Switch attenuator for wave guides |
Also Published As
| Publication number | Publication date |
|---|---|
| FR927268A (en) | 1947-10-24 |
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