DE809819C - Device for generating phase-modulated ultra-high-frequency oscillations - Google Patents
Device for generating phase-modulated ultra-high-frequency oscillationsInfo
- Publication number
- DE809819C DE809819C DEP20519D DEP0020519D DE809819C DE 809819 C DE809819 C DE 809819C DE P20519 D DEP20519 D DE P20519D DE P0020519 D DEP0020519 D DE P0020519D DE 809819 C DE809819 C DE 809819C
- Authority
- DE
- Germany
- Prior art keywords
- voltage
- cathode
- electrode
- modulation
- frequency oscillations
- 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
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
- H01J25/04—Tubes having one or more resonators, without reflection of the electron stream, and in which the modulation produced in the modulator zone is mainly density modulation, e.g. Heaff tube
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
- H01J25/10—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/02—Tubes with electron stream modulated in velocity or density in a modulator zone and thereafter giving up energy in an inducing zone, the zones being associated with one or more resonators
- H01J25/10—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator
- H01J25/16—Klystrons, i.e. tubes having two or more resonators, without reflection of the electron stream, and in which the stream is modulated mainly by velocity in the zone of the input resonator with pencil-like electron stream perpendicular to the axis of the resonators
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C3/00—Angle modulation
- H03C3/30—Angle modulation by means of transit-time tube
Landscapes
- Particle Accelerators (AREA)
Description
Die Erfindung bezieht sich auf eine Vorrichtung zur Erzeugung von in der Phase modulierten ultrahochfrequenten Schwingungen mit einer elektrischen Entladungsröhre, in der ein Elektronenbündel erzeugt wird, d. h. eine sog. Induktionsröhre oder Haeffröhre. Es ist bereits bekannt, daß die Frequenz der erzeugten Schwingungen bei diesen Röhren von der Bündelspannung abhängig ist und daß bei den damit verwandten Klystrons durch Modulation der Bündelspannung Phasenmodulation erzielbar ist.The invention relates to a device for generating phase-modulated ultra-high-frequency oscillations with an electrical Discharge tube in which a beam of electrons is generated, d. H. a so-called induction tube or Haeff tube. It is already known that the frequency of the vibrations generated in these tubes of the Bundle voltage is dependent and that with the related klystrons by modulation of the bundle voltage Phase modulation can be achieved.
Wenn keine besonderen Maßnahmen getroffen werden, tritt hierbei auch starke Amplitudenmodulation auf. Ein anderer großer Nachteil besteht darin, daß zur Erzielung hinreichender Phasenmodulation Modulationsspannungen von io bis 20°/o der Bündelspannung erforderlich sind. Dies erfordert einen großen Modulationsverstärker.If no special measures are taken, strong amplitude modulation also occurs on. Another major disadvantage is that to achieve sufficient phase modulation Modulation voltages of 10 to 20% of the bundle voltage are required. This requires a large modulation amplifier.
Um diese Nachteile zu vermeiden, wird nach der Erfindung in einer Vorrichtung zur Erzeugung von inIn order to avoid these disadvantages, according to the invention, in a device for generating in
ao der Phase modulierten ultrahochfrequenten Schwingungen mit einer elektrischen Entladungsröhre, in der ein Elektronenbündel erzeugt wird, die Modulationsspannung einer zylindrischen Elektrode zugeführt, die zwischen der Kathode und der ersten der die Bündel-ao the phase modulated ultra-high frequency oscillations with an electric discharge tube in which an electron beam is generated, the modulation voltage is supplied to a cylindrical electrode, the between the cathode and the first of the bundle
s5 spannung bestimmenden Elektroden angeordnet ist, wobei die Modulationselektrode in bezug auf die Kathode eine positive Spannung hat, die geringer als die Bündelspannung ist und vorzugsweise weniger als Vr, derselben beträgt.s5 voltage-determining electrodes are arranged, wherein the modulating electrode has a positive voltage with respect to the cathode that is less than the beam voltage is, and preferably less than Vr, the same.
Sofern die Modulationselektrode in der Bewegungsrichtung der Elektronen hinreichend lang bemessen ist, braucht die Modulationsspannung nicht mehr als 15 bis 20% der Spannung zwischen den Modulationselektroden und der Kathode zu betragen. Die Elek- tronen laufen nämlich in der Modulationselektrode noch mit geringer Geschwindigkeit, so daß eine kleine Änderung derselben bereits einen ziemlich großen Einfluß auf die Laufzeit der Elektronen hat.Provided the modulation electrode is dimensioned to be sufficiently long in the direction of movement of the electrons the modulation voltage need not be more than 15 to 20% of the voltage between the modulation electrodes and the cathode. The elec- Trons run namely in the modulation electrode still at low speed, so that a small Changing the same already has a fairly large influence on the transit time of the electrons.
Da die Bündelspannung konstant ist, tritt nur eine geringe Amplitudenmodulation auf, auch wenn keine besonderen Maßnahmen getroffen werden.Since the bundle voltage is constant, there is only a slight amplitude modulation, even if none special measures are taken.
Bei niedriger Gleichspannung auf der Modulationselektrode ist es vorteilhaft, an der Kathodenseite der Modulationselektrode ein Gitter mit weiten Maschen anzuordnen, um dort eine Äquipotentialfläche zu sichern, so daß die Laufzeit über den ganzen Bündelquerschnitt konstant ist.If the DC voltage on the modulation electrode is low, it is advantageous to use the on the cathode side Modulation electrode to arrange a grid with wide meshes in order to create an equipotential surface there secure so that the running time is constant over the entire bundle cross-section.
Die Erfindung sei an Hand der Zeichnung, in der eine Röhre nach der Erfindung mit entsprechender Apparatur dargestellt ist, näher erläutert.The invention is based on the drawing, in which a tube according to the invention with corresponding Apparatus is shown, explained in more detail.
In der Figur ist die aus Quarz bestehende Wand der Entladungsröhre mit 1 bezeichnet. In dieser Röhre ist am einen Ende eine flache Kathode 2 und dieser gegenüber ein Steuergitter 3 angeordnet. Am anderen Röhrenende ist die hohle Fangelektrode 4 angeordnet, die beim Betrieb eine Spannung z. B. von 2000 V in bezug auf die Kathode erhält. Mit 5 und 6 sind zwei ringförmige Elektroden bezeichnet, die die Entladungsstrecke umgeben und beim Betrieb eine Spannung von 4000 V in bezug auf die Kathode erhalten. Zwischen der Elektrode 5 und dem Steuergitter ist die längliche zylindrische Elektrode 7 angeordnet, die auf der der Kathode zugewandten Seite ein Gitter mit weiten Maschen enthält. Diese Elektrode erhält beim Betrieb der Röhre eine Spannung von 500 V. Rings um den mittleren Teil der Röhre ist ein Hohlraumresonator 8 angeordnet, dessen Eigenfrequenz derjenigen der zu erzeugenden Schwingungen entspricht. In einer öffnung dieses Resonators ist eine Kupplungsschleife 9 angeordnet, die mit den Zuführungsleitungen des Gitters und der Kathode verbunden ist. Auf diesen beiden Leitungen ist eine verschiebbare Kurzschlußbrücke 10 angeordnet, mit deren Hilfe der Gitterkreis abstimmbar ist. Im Hohlraumresonator ist ferner die Kupplungsschleife 11 der Antenne untergebracht. Die Modulationsspannung wird der Elektrode 7 zugeführt und braucht nur 50 bis 80 V zu betragen. Zur Zusammendrängung des Elektronenbündels werden rings um die Röhre an beiden Seiten des Resonators 8 Magnetspulen angeordnet, die ein konstantes Magnetfeld in Richtung der Röhrenachse erzeugen. Diese Spulen sind der Übersichtlichkeit halber nicht dargestellt.In the figure, the wall of the discharge tube made of quartz is denoted by 1. In this tube a flat cathode 2 is arranged at one end and a control grid 3 is arranged opposite this. At the other Tube end, the hollow collecting electrode 4 is arranged, which, during operation, a voltage z. B. from 2000 V in with respect to the cathode. With 5 and 6 two ring-shaped electrodes are designated, which the discharge path and received a voltage of 4000 V with respect to the cathode during operation. Between the electrode 5 and the control grid the elongated cylindrical electrode 7 is arranged on the side facing the cathode contains a wide mesh grid. This electrode receives a voltage when the tube is in operation of 500 V. A cavity resonator 8 is arranged around the middle part of the tube, its natural frequency corresponds to that of the vibrations to be generated. In one opening of this resonator is a coupling loop 9 is arranged, which connects to the supply lines of the grid and the cathode connected is. A displaceable short-circuit bridge 10 is arranged on these two lines, with whose help the grid circle is tunable. The coupling loop 11 is also located in the cavity resonator the antenna. The modulation voltage is fed to the electrode 7 and only needs 50 up to 80 V. In order to compress the electron beam, there will be an on all around the tube both sides of the resonator 8 magnetic coils arranged, which a constant magnetic field in the direction of the tube axis. For the sake of clarity, these coils are not shown.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL257597X | 1946-06-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE809819C true DE809819C (en) | 1951-08-02 |
Family
ID=19781379
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP20519D Expired DE809819C (en) | 1946-06-07 | 1948-11-04 | Device for generating phase-modulated ultra-high-frequency oscillations |
Country Status (6)
Country | Link |
---|---|
US (1) | US2617091A (en) |
BE (1) | BE473716A (en) |
CH (1) | CH257597A (en) |
DE (1) | DE809819C (en) |
FR (1) | FR947563A (en) |
GB (1) | GB649524A (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2253080A (en) * | 1940-03-21 | 1941-08-19 | Rca Corp | Resonant chamber circuit for use especially with inductive output tubes |
US2368328A (en) * | 1940-03-30 | 1945-01-30 | Rca Corp | High frequency generator |
US2440089A (en) * | 1942-08-18 | 1948-04-20 | Rca Corp | Electron discharge device employing cavity resonators |
US2435601A (en) * | 1942-12-31 | 1948-02-10 | Gen Electric | Phase modulation system |
US2434704A (en) * | 1944-03-20 | 1948-01-20 | Rca Corp | Electric space discharge circuits |
US2456466A (en) * | 1944-09-20 | 1948-12-14 | Phiilco Corp | Variable time delay electronic apparatus |
-
0
- BE BE473716D patent/BE473716A/xx unknown
-
1947
- 1947-05-03 US US745706A patent/US2617091A/en not_active Expired - Lifetime
- 1947-06-04 GB GB14789/47A patent/GB649524A/en not_active Expired
- 1947-06-05 FR FR947563D patent/FR947563A/en not_active Expired
- 1947-06-05 CH CH257597D patent/CH257597A/en unknown
-
1948
- 1948-11-04 DE DEP20519D patent/DE809819C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE473716A (en) | |
FR947563A (en) | 1949-07-06 |
US2617091A (en) | 1952-11-04 |
CH257597A (en) | 1948-10-15 |
GB649524A (en) | 1951-01-31 |
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