GB621993A - Improvements in or relating to radio frequency systems - Google Patents
Improvements in or relating to radio frequency systemsInfo
- Publication number
- GB621993A GB621993A GB5979/47A GB597947A GB621993A GB 621993 A GB621993 A GB 621993A GB 5979/47 A GB5979/47 A GB 5979/47A GB 597947 A GB597947 A GB 597947A GB 621993 A GB621993 A GB 621993A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- condenser
- valve
- sheath
- aerial
- 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
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/54—Amplifiers using transit-time effect in tubes or semiconductor devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D9/00—Demodulation or transference of modulation of modulated electromagnetic waves
- H03D9/06—Transference of modulation using distributed inductance and capacitance
- H03D9/0608—Transference of modulation using distributed inductance and capacitance by means of diodes
- H03D9/0625—Transference of modulation using distributed inductance and capacitance by means of diodes mounted in a coaxial resonator structure
Abstract
621,993. Aerial coupling arrangements; receiving systems. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. March 3,1947, No. 5979. Convention date, Sept. 22, 1943. [Class 40 (v)] [Also in Group XL (b)] In coupling an input line 2 from an aerial to a valve 8, a resonator 3 is used comprising a core 4 connected at one end to a conducting sheath and at its other end through a condenser 6 to the sheath and this end is connected to the valve grid 12 through a condenser 13. The sheath is approximately an integral number of quarter wavelengths long of the frequency to be received, with a resonant frequency partly dependent on the condensers 13, 6, and variable by the condenser 6. The condenser 13 has a value approximately equal to the grid-cathode capacity 28 of the valve 8 and together with the input tapping 7 is variable for impedance matching. The frequency input may be heterodyned by cathode-injected oscillations from a generator 16 with frequency controlled by coupled quarter-wave rods 22, 21, and cathode output' circuit comprising a variably tappedconducting core 26 in a conducting sheath 27 connected to the core at one end and to ground, but not resonant to the generator frequency. The mixed oscillations are derived from the anode 9 of the valve 8. Loose coupling of the generator with the mixer and of the aerial with the mixer is obtained.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US621993XA | 1943-09-22 | 1943-09-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB621993A true GB621993A (en) | 1949-04-25 |
Family
ID=22040836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5979/47A Expired GB621993A (en) | 1943-09-22 | 1947-03-03 | Improvements in or relating to radio frequency systems |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE473962A (en) |
| FR (1) | FR946999A (en) |
| GB (1) | GB621993A (en) |
-
0
- BE BE473962D patent/BE473962A/xx unknown
-
1947
- 1947-03-03 GB GB5979/47A patent/GB621993A/en not_active Expired
- 1947-05-21 FR FR946999D patent/FR946999A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE473962A (en) | |
| FR946999A (en) | 1949-06-20 |
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