GB307894A - Improvements in or relating to radio receiving systems - Google Patents
Improvements in or relating to radio receiving systemsInfo
- Publication number
- GB307894A GB307894A GB8525/29A GB852529A GB307894A GB 307894 A GB307894 A GB 307894A GB 8525/29 A GB8525/29 A GB 8525/29A GB 852529 A GB852529 A GB 852529A GB 307894 A GB307894 A GB 307894A
- Authority
- GB
- United Kingdom
- Prior art keywords
- beat
- frequencies
- fading
- output
- rectifier
- 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
Abstract
307,894. Marconi's Wireless Telegraph Co., Ltd., (Assignees of Beverage, H. H., and Peterson, H. 0.). March 15, 1928, [Convention date]. Fading, preventing. - 'Wireless signals are received on each of a plurality of geographically separated aerials 31, 33 and the signal effects produce in each receiving system 43, 45 a beat note of different frequency, and the separate beat notes are combined in a receiving circuit substantially independently of their relative phase relationship to eliminate the effects of fading. Intermediate beat frequencies are obtained by means of local generators 47, 49 and are amplified by a common selective amplifier 51. The output of the amplifier is connected with a fullwave rectifier 59, 61 and filtering means, such as a condenser 63, bye-pass the intermediate frequencies across a receiving instrument 65 in the output of the rectifier. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a modification in which the beat frequencies are of the order of 1000 cycles, are amplified separately, and impressed on separate primary windings of a transformer having telephones connected to its secondary winding (Fig. 1, cancelled, not shown). This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US26173828A | 1928-03-15 | 1928-03-15 | |
| US63132A US2069813A (en) | 1928-03-15 | 1936-02-10 | Fading elimination |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB307894A true GB307894A (en) | 1930-01-30 |
Family
ID=26743078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8525/29A Expired GB307894A (en) | 1928-03-15 | 1929-03-15 | Improvements in or relating to radio receiving systems |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2069813A (en) |
| GB (1) | GB307894A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE471813A (en) * | 1946-03-12 | |||
| US2604586A (en) * | 1949-04-28 | 1952-07-22 | Rca Corp | Diversity reception |
| US2979613A (en) * | 1958-08-26 | 1961-04-11 | Itt | Radio diversity receiving system |
-
1929
- 1929-03-15 GB GB8525/29A patent/GB307894A/en not_active Expired
-
1936
- 1936-02-10 US US63132A patent/US2069813A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2069813A (en) | 1937-02-09 |
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