GB412500A - Improvements in or relating to radio transmitting installations - Google Patents
Improvements in or relating to radio transmitting installationsInfo
- Publication number
- GB412500A GB412500A GB35718/33A GB3571833A GB412500A GB 412500 A GB412500 A GB 412500A GB 35718/33 A GB35718/33 A GB 35718/33A GB 3571833 A GB3571833 A GB 3571833A GB 412500 A GB412500 A GB 412500A
- Authority
- GB
- United Kingdom
- Prior art keywords
- feeder
- aerial
- terminals
- transmitter
- resistances
- 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
- 238000009434 installation Methods 0.000 title 1
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
Landscapes
- Radio Relay Systems (AREA)
Abstract
412,500. Impedance networks. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London. -(Assignees of Bird, L. T. ; 211, St. Sacrament Street, Montreal, Canada.) Dec. 19, 1933, No. 35718. Convention date, April 22. [Classes 40 (iii) and 40 (v).] When a transmitter is connected to an aerial by a feeder, overloading of the transmitter due to initial mismatching of the aerial tuning and coupling device is .presented by the use during adjustment of a resistance network which serves both as a dummy load and as a bridge for testing the impedance of the aerial. The transmitter is connected through a feeder to the terminals T1, T2, and so to a network composed of resistances as shown in Fig. 3, where each resistance is equal to the characteristic impedance of the feeder, and during adjustment of the transmitter the galvanometer branch G is broken while a further resistance, equal to each of the others, is connected across the terminals H1, H2 (Fig. 2, not shown). Under these conditions the network is matched to the feeder at terminals T1, T2. The aerial is next connected across terminals H1 and H2 and its tuning and coupling device is adjusted until the galvanometer G indicates that the bridge is balanced. Finally the aerial is connected directly to the feeder at terminals T1, T2. The resistances shown as separate may be replaced by a smaller number of resistances having an equivalent effect (Fig. 1, not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA412500X | 1933-04-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB412500A true GB412500A (en) | 1934-06-28 |
Family
ID=4171538
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB35718/33A Expired GB412500A (en) | 1933-04-22 | 1933-12-19 | Improvements in or relating to radio transmitting installations |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB412500A (en) |
-
1933
- 1933-12-19 GB GB35718/33A patent/GB412500A/en not_active Expired
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