GB504021A - Improvements in or relating to electric wave filtering systems - Google Patents
Improvements in or relating to electric wave filtering systemsInfo
- Publication number
- GB504021A GB504021A GB2483837A GB2483837A GB504021A GB 504021 A GB504021 A GB 504021A GB 2483837 A GB2483837 A GB 2483837A GB 2483837 A GB2483837 A GB 2483837A GB 504021 A GB504021 A GB 504021A
- Authority
- GB
- United Kingdom
- Prior art keywords
- band
- low frequencies
- relating
- electric wave
- wave filtering
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/12—Frequency diversity
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
504,021. Wide - band transmission. PERCIVAL, W. S. Sept. 13, 1937, No. 24838. [Class 40 (iv)] [Also in Group XL] The low frequencies of a wide frequency band 1 are isolated by a filter 5 and modulated at 6 onto a carrier whose frequency is higher than the highest frequency in 1. The modulated carrier is transmitted together with the band 1 over a cable 7, is selected at 12, demodulated and mixed with the original band 1, from which the low frequencies have been eliminated, to form the undistorted band 22. A filter 16 eliminates the modulated carrier from the transmitted signal, and low frequencies are isolated by 18 and subtracted from the signal passing the delay circuit 20. The delay network 21 equalizes the delay over the two channels 10, 11. Specifications 471,913 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2483837A GB504021A (en) | 1937-09-13 | 1937-09-13 | Improvements in or relating to electric wave filtering systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2483837A GB504021A (en) | 1937-09-13 | 1937-09-13 | Improvements in or relating to electric wave filtering systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB504021A true GB504021A (en) | 1939-04-13 |
Family
ID=10218027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2483837A Expired GB504021A (en) | 1937-09-13 | 1937-09-13 | Improvements in or relating to electric wave filtering systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB504021A (en) |
-
1937
- 1937-09-13 GB GB2483837A patent/GB504021A/en not_active Expired
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