GB675991A - Improvements in and relating to electron discharge high frequency apparatus - Google Patents
Improvements in and relating to electron discharge high frequency apparatusInfo
- Publication number
- GB675991A GB675991A GB1405446A GB1405446A GB675991A GB 675991 A GB675991 A GB 675991A GB 1405446 A GB1405446 A GB 1405446A GB 1405446 A GB1405446 A GB 1405446A GB 675991 A GB675991 A GB 675991A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- resonator
- cylinder
- grid
- plunger
- 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
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
- H03B5/18—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance
- H03B5/1817—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator
- H03B5/1835—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising distributed inductance and capacitance the frequency-determining element being a cavity resonator the active element in the amplifier being a vacuum tube
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
675,991. Valve generating circuits. BRITISH THOMSON-HOUSTON CO., Ltd. (General Electric Co.). May 9, 1946, No. 14054/46. Class 40 (vi). Electron discharge high frequency apparatus comprises a cylindrical cavity resonator enclosing a substantially coaxial grid controlled electric discharge tube, such as a triode tube, having a grid connected to a metal member projecting from the envelope of the tube into the resonator, the metal member extending a considerable length from the envelope of the tube to form a boundary between the anodegrid and grid-cathode spaces in the resonator, thus constituting a wave-guide which defines between its end and the wall of the resonator a coaxial peripheral coupling opening of annular shape, and reverses the direction of propagation, thereby lengthening the path, of the wave energy travelling around the end of the metal member. In the construction shown in Fig. 1 the triode 10 is of the form described in Specification 584,787 and is surrounded by a resonator comprising a coaxial copper or brass, preferably silver-plated, cylinder 50, having a conductive well part 52 providing a mount for the base of the tube 10 and having a ring 54 provided with a ring of spring fingers 55 bearing on the metal part 18 having a high frequency capacity coupling with the cathode of the tube 10. The connection to the anode is made by a solid cylindrical conductor 59 provided with contact fingers 61, 62 engaging the anode terminals 16, 23 of the tube 10. The grid terminal 17 is peripherally connected to a long metal wave-guide forming tube 64 and through this to a terminal wire 65 extending through an insulating bead 66 in the wall of the cylinder 50 and placed at a point corresponding to a voltage node for the resonator. The effective length of the tube 64 is half a wave length. The frequency of the resonator formed by the cylinder 50 is adjusted by a plunger 71 having two sets of contact fingers 72, 73 bearing respectively on the parts 59, 50 and moved by rods 75. High-frequency energy is taken from the oscillator by a coupling loop 80 supported from a tubular conductor 82 and connected to a wire 83 forming with the conductor 82 a coaxial transmission line. In a modification the tuning plunger carries the output loop and is joined by an insulating link with a cylindrical conductive sleeve telescoped over the outer surface of the tube 64. The cylinder 50 and tube 64 may be of outwardly flared or frusto-conical shape. In the construction shown in Fig. 5, a conductive disc 128 integral with or joined to the grid 112 extends into the cylindrical resonator 117. Annular plunger tuning devices may be connected to the top and bottom faces of the cylindrical resonator. In the construction shown in Fig. 7 variable impedance means are provided by the, preferably conductive, cylinder 181 moved by the rod 184, and provided with longitudinal slots 182, 183 and having a restricted region 181<SP>1</SP> in contact with the tubular conductor 178. The cylinder 181 may be moved concurrently with the tuning plunger 185. In the construction shown in Fig. 8 the member 191 connected to the anode is insulated at 193 from the tubular conductor 192 and an annular impedance controlling member 194, in spaced relationship with conductor 192 and cylinder 176, is connected by spaced rods 195 with the tuning plunger 185. A tuned metallic cup-like member 199 provides high impedance filtering means. In the construction shown in Fig. 9 leakage of electromagnetic energy is reduced by a member 205 adjusted by the screw device 206, 207 and surrounding the members 203, 204 connected to the anode and the filtering means 208, 209. Tuning is effected by the plungers 210, 211, the plunger 210 controlling the reflected waves and permitting control of the magnitude and phase of the grid-cathode voltage. Specification 552,672 also is referred to.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1405446A GB675991A (en) | 1946-05-09 | 1946-05-09 | Improvements in and relating to electron discharge high frequency apparatus |
FR978544D FR978544A (en) | 1946-05-09 | 1948-01-21 | High frequency oscillator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1405446A GB675991A (en) | 1946-05-09 | 1946-05-09 | Improvements in and relating to electron discharge high frequency apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB675991A true GB675991A (en) | 1952-07-23 |
Family
ID=10034148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1405446A Expired GB675991A (en) | 1946-05-09 | 1946-05-09 | Improvements in and relating to electron discharge high frequency apparatus |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR978544A (en) |
GB (1) | GB675991A (en) |
-
1946
- 1946-05-09 GB GB1405446A patent/GB675991A/en not_active Expired
-
1948
- 1948-01-21 FR FR978544D patent/FR978544A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR978544A (en) | 1950-04-16 |
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