GB305987A - Improvements in or relating to radio and the like receiving systems - Google Patents
Improvements in or relating to radio and the like receiving systemsInfo
- Publication number
- GB305987A GB305987A GB4049/29A GB404929A GB305987A GB 305987 A GB305987 A GB 305987A GB 4049/29 A GB4049/29 A GB 4049/29A GB 404929 A GB404929 A GB 404929A GB 305987 A GB305987 A GB 305987A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistance
- aerials
- coupled
- value
- valves
- 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
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/084—Equal gain combining, only phase adjustments
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
305,987. Telefunken Ges. f³r Drahtlose Telegraphie. Feb. 13, 1928, [Convention date]. Fading, preventing. - Several spaced aerials A1, A2, A3 are coupled through amplifiers V1, V2, V3 to rectifiers g1, g2, g3 supplying corresponding grid-biassing voltage to valves R1, R2, R3 branched in parallel across a common alternatir.g-current circuit K fed from a source H generating a frequency in the neighbourhood of 5000 cycles per second. Energy received on any one or more of the aerials reduces the resistance of the corresponding valve R1, R2 or R3, and so increases the value of the alternating current flowing through a resistance w which is coupled to the final receiver J. The value of the resistance w is made high relatively to that of the shunt valves so that it operates as a limiting device, the receiver being operated by substantially equal currents no matter how many of the aerials are excited. The arrangement is particularly suitable for short-wave morse or picture signalling.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE305987X | 1928-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB305987A true GB305987A (en) | 1929-10-24 |
Family
ID=6120974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4049/29A Expired GB305987A (en) | 1928-02-13 | 1929-02-06 | Improvements in or relating to radio and the like receiving systems |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1934211A (en) |
| GB (1) | GB305987A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL117404B (en) * | 1944-06-16 | |||
| US2606282A (en) * | 1945-07-09 | 1952-08-05 | Harry J Lipkin | Pulse transponder |
| US2512462A (en) * | 1946-02-20 | 1950-06-20 | Rca Corp | Diversity system |
| FR940009A (en) * | 1947-01-04 | 1948-12-01 | Radio Electr Soc Fr | Improvements to radio networks |
| US2515561A (en) * | 1948-06-21 | 1950-07-18 | Frank M Lindley | Communication mechanism |
-
1929
- 1929-01-30 US US336038A patent/US1934211A/en not_active Expired - Lifetime
- 1929-02-06 GB GB4049/29A patent/GB305987A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1934211A (en) | 1933-11-07 |
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