DE1541916A1 - Ultra-high frequency electron tubes - Google Patents

Description

DR. MÜLLER-BORE DIPL.-ING. GRALFS DR. MANITZ

PATENT Attorneys | 04 I iJ I D

Braunschweig, Austria, 1967 Our reference: Kl / kl- E

English Electric Valve Company Limited English Electric liouse / Strand London WC ₀ 2 / England

Ultra-high frequency electron tube

Priority: Great Britain from 9 May 1966 (20403/66)

The invention relates to ultra-high frequency electron tubes like ζ »B.Klystrons or Lauffeldröhren, especially the Kind in which the so-called tubular body, i.e. the High frequency interaction section of the tube, dated Collector section of the tube is insulated by a gap, which the electron beam on its tfeg to the collector must go through.

The invention is described below in connection with the drawing.

Figure 1 is a schematic and greatly simplified representation

of a typical known klystron that is merely

serves as an explanation,
Figure 2 is a view of an embodiment of the invention,

with a klystron only so far as to be understood

of the invention is shown necessary and

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BROWN SWEEP. AM bOrQIRPARK β 2? (0531) 114 97 β MUNICH 22. ROBERT KOCH-STIt. I * & lOlltl 22 Il IO

e ", _m 9n / i inen k. a

FIG. 3 shows a modification of the klystron according to FIG. 2.

In the current construction of a klystron, the tube is made up of three main sections, as shown in Figure Section 1 contains the electron gun, from which an electron beam is emitted through section 2 to the collector electrode scanning 3.

ψ portion 2 is commonly referred to as köhrenkörper and includes a tiochfrequenz-.iechselwirkungsanordnung known Form.Abschnitt 3 contains the collector or oammelelektrode from which the electron beam werden.Beim collected final pass through the interaction means occur, the electrons of ötrahls in "iechselwirkung with a high-frequency input signal to produce an amplification in a known manner, section 2 is normally at ground potential, while section 3 is at a

t is higher potential, so that good insulation is required between these two sections.This is normally achieved by interrupting the copper tube 4 through which the electron beam passes between sections 2 and 3, so that a rf gap 5 is created. which ensures the necessary insulation. The continuity of the evacuated iiöhrengehäuses is ensured by such -Viittel ₃ B.einen ceramic cylinder 6, the vacuum-tight manner with the two metal rings 7 and ti, between which it is arranged, connected .The hinge 7 and 8 are vacuum-tight on both sides of . Column 5 with the

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copper pipe 4 connected.

If no preventive measures are taken, the passage of the from the »echselffektsabschnitt 2 exiting beam through the gap 5, the radiation of considerable high frequency energy, which is sufficient, neighboring To significantly interfere with radio frequency equipment or other electronic equipment, it is customary to prevent this from occurring

Practice, the gap 5 by a capacity created by one dielectric capacitor from a pair at a short distance electrodes (not shown) arranged from one another within the evacuated tube housing are formed, The size of the inside of the evacuated Tube housing available gap is limited, whereby accordingly the permissible flee and thus the Capacity of the electrodes of the capacitor is limited. In order to obtain a sufficiently large capacity to adequately bridge the gap, the (| Electrodes are placed at a short distance from each other, However, since they are located near the apalt, they are the Exposed to electron bombardment and are therefore heated outside. This “karate is difficult to carry off, so there are faults of the electrodes, which creates the danger of flashovers or short circuits during operation Occurs between section 2 and collector 3 a short circuit can seriously damage the kettle

or become unusable. __

^r j: i- ORIGINAL 0098U / 0712

The aim of the invention is to address the aforementioned disadvantages eliminate and a structurally robust, reliable and comparatively cheap and easy to manufacture tube to accomplish.

According to the invention in the broadest sense, a high-frequency electron tube of the type mentioned contains a gap which is bridged by a capacitor with a dielectric W made of solid material, the electrodes of the capacitor being outside the evacuated tube housing and the tube in the vicinity of the gap surround.

According to a feature of the invention, an ultra-high frequency drive tube contains at that of the high frequency interaction section from the collector section through a gap in a metal tube through which the electron beam passes, insulated between these two sections is a metallic member that holds the tube near the gap "encloses and is electrically connected to the pipe on one side of the gap, as well as a second metallic one Limb that also surrounds the tube near the gap and is electrically connected to the pipe on the other side of the gap, the metallic members through a Link made of solid dielectric material between them is sandwiched, held at a distance from each other and the three links a capacitor with a Form a dielectric from solid material that lies outside the evacuated housing and bridges the gap.

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⁸ ^ ORIGINAL

The three links that make up the capacitor and from which two made of metal and the third made of a solid dielectric can have any shape Embodiment, the links are plate-shaped, in one further embodiment tubular or cylindrical.

In one embodiment of the invention, the links are metal Plates with an L-shaped cross-section, each of which consists of a ring part with a short cylindrical neck, which protrudes from the inner edge of the ring part, consists The cylindrical approach of a metallic member forms a unit with one electrically and mechanically Metal ring, which is electrically connected to the pipe on one side of the gap, and the cylindrical extension of the other metallic member is electrically connected via a spring contact to a second metal ring, which with is electrically connected to the pipe on the other side of the gap.

In the nusführungform the invention shown in Figure 2 is the collector section with 3, the metal pipe, through that the beam travels (usually a copper pipe) with 4, the gap with 5, the ceramic cylinder with 6 and the two ring-shaped metallic links with 7 and 8 This corresponds to the notation in Figure The electron gun section (l and Figure l) of the tube is not shown and only the end part of the interaction section 2 is shown.

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A metal ring 9 aa is attached to the tube 4 between the ring 8 and the adjoining end of the interaction section 2. On the other oeite of the opalt 5, between the metal ring 7 and the collector section 3, another iVietallring 10 is attached to the tube 4, which has a slightly smaller diameter than the ring 9. The outer edge of the ring 10 has a circumferential groove, one of which W coiled spring 11 is added.

A metal plate 12 with an L-shaped cross-section, which consists of a ring part 12A and a cylinder part 12B, is attached to the outer edge of the ring 9 with the outer end of the cylinder part. A second ** metal plate 13 similar in shape to the plate 12 is made by a plate of solid dielectric material held at a distance from the plate 12. The dielectric is denoted 14 and is sandwiched between the plates 12 and 13. The inner surface "of the cylinder portion of the member 13 contacts the spring 11 as shown and is so with the member 10 The parts 12-14-13 thus form a capacitor with solid dielectric, which lies outside the evacuated tube housing and whose capacitance can easily be made large enough to prevent undesired radiation of high frequency energy from the gap 5, while that in conventional arrangements The existing risk of flashovers or short circuits is eliminated. Parts 13 and 14 are hatched in FIG rt to make the presentation clearer.

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In the embodiment according to FIG. 2, the capacitor formed from the files 12-14-13 has a plate-like shape, ie the electrodes are essentially plate-shaped. The modification shown in Figure 3 is essentially self-explanatory from the drawing. It obviously differs from the embodiment according to Figure 2 in that the ^{capacitor formed from the parts 12'-14'-1S 1} is tubular or cylindrical and the electrodes 12 'f and 13' are cylindrical.

ORIGlNAL BATHROOM

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Claims (6)

Claims 1. Ultra-high frequency electron tube in which the interaction section from the collector section through a gap that the electron beam creates on its way to the collector electrode must go through, is isolated, characterized that the gap is bridged by a capacitor fe, whose dielectric consists of solid material and whose electrodes lie outside the evacuated tube housing and enclose the tube in the vicinity of the gap. 2. High-frequency electron tube in which the high-frequency interaction section from the collector section through a gap in a metal tube through which the electron beam runs, isolated between these two sections is characterized by a metallic member that the Enclosing tube near the gap and electrically connected to the tube on one side of the gap, and through a second metallic member that also surrounds the tube near the gap and electrically connects to the tube is connected to the other side of the gap, as well as that the metallic members are supported by a member of solid dielectric material sandwiched between them is arranged to be kept at a distance from each other and the three limbs form a solid dielectric capacitor that bridges the gap outside the evacuated enclosure bridged. 0098H / 0712 ~ «o 3. Tube according to claim 2, characterized in that the capacitor is plate-shaped. 4. Tube according to claim 2, characterized in that the condenser is tubular. 5. Tube according to claim 3, characterized in that the metal links are plates with an L-shaped cross-section, each of which consists of a ring part with a short cylindrical extension protruding from the inner edge of the ring part, consists and that the cylindrical approach of a metallic member electrically and mechanically a unit with a Forms metal ring, which is electrically connected to the pipe on one side of the gap, while the cylindrical Approach of the other metallic member is electrically connected to a second metal ring via a contact spring is the one with the pipe on the other side of the gap is in electrical connection. 6. Tube according to claim 4, characterized in that the metal members and the solid dielectric member Material are coaxial cylinders that wrap around the collector section of the tube extend parallel to the tube axis. BATH 009814/0712 Blank page