JPH0766748B2 - Magnetron - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a magnetron, and more particularly to a junction structure between an anode and an antenna.

[Background of the Invention]

FIG. 1 is a view showing an example of an anode assembly of a magnetron known from Japanese Utility Model Publication No. 53-51169.
FIG. 3A is a plan view of a main part, and FIG. 2B is a sectional view taken along the line BB ′. In the figure, 1 is an anode made of a cylindrical body, 2 is a plurality of vanes forming a cavity resonator inside the anode 1, and any one of the vanes 2 has a microwave output to the outside. The antenna 3 to be led out is joined. Reference numerals 4a and 4b are outer and inner strap rings for alternately connecting a plurality of vanes 2 for stable oscillation.

In such a configuration, the antenna 3 has a cutout portion 2a in which the vane 2 has a thickness substantially equal to that of the antenna 3.
Is provided, the end portion of the antenna 3 is fitted into the cutout portion 2a, and the wire-shaped silver brazing material 5 is formed and arranged in a shape substantially along the cross section of the antenna 3 at the peripheral portion thereof. Supply and about 850 in non-oxidizing atmosphere such as hydrogen
The temperature is raised to ℃ to melt and silver braze.

However, according to such a configuration, when the antenna 3 is placed close to the anode working space in order to improve the microwave oscillation efficiency, the silver brazing filler metal 5 comes into contact with the outer strap ring 4a which should not originally come into contact. In addition, there is a problem that a high cost exclusive silver brazing material 5 must be used to prevent this. Further, in recent years, the magnetron tends to make the bonding position of the antenna 3 to the vane 2 closer to the central axis side of the anode 1 due to the demand for high efficiency.

[Object of the Invention]

Therefore, the present invention has been made in view of the above-mentioned circumstances, and an object thereof is to connect an antenna in the vicinity of the strap ring without using an expensive silver brazing material for mounting the antenna, and to achieve low cost and high efficiency. It is to provide a magnetron capable of obtaining a microwave output.

[Outline of Invention]

In order to achieve such an object, the present invention is one in which an antenna and a strap ring are brought into contact with each other, and the antenna and the vane are joined by a silver plating of the strap ring.

Example of Invention

 Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a diagram of an anode assembly showing an example of a magnetron according to the present invention, FIG. 2 (a) is a plan view of a main part, and FIG. 2 (b) is a sectional view taken along the line BB ′ of FIG. The same parts as are denoted by the same reference numerals. In the figure, the outer strap ring 4a of one vane 2 has a housing groove 2a integrally formed on the outer peripheral side thereof with an antenna housing groove 2b having a size substantially equal to the thickness of the antenna 3. One end of the antenna 3 is combined with the housing groove 2b and is fitted and arranged in contact with the outer strap ring 4a. The antenna 3 is simultaneously joined to the vane 2 by the silver plating of the outer strap ring 4a.

According to such a configuration, an expensive silver brazing material for joining the antenna, which is used when assembling the vane 2 and the antenna 3, is unnecessary, and therefore, the silver brazing material is left behind and the outer strap ring 4a that should not come into contact with it. No more contact with Bain 2. Moreover, the antenna 3 is attached to the outer strap 4a.
Since they can be joined by the silver plating, a highly reliable electrical connection is possible, and a highly efficient microwave output can be obtained at low cost.

〔The invention's effect〕

As described above, according to the present invention, the number of parts and man-hours can be reduced, and an extremely excellent effect that a microwave output with low cost, high reliability, and high efficiency can be obtained.

[Brief description of drawings]

FIG. 1 is a view showing an anode assembly for explaining an example of a conventional magnetron, and FIG. 2 is a view showing an anode assembly for explaining an example of a magnetron according to the present invention. 1 ... Anode, 2 ... Bain, 2a ... Strapping groove, 2b ... Antenna groove, 3 ... Antenna, 4a
…… Outer strap ring, 4b …… Inner strap ring.

Claims (1)

[Claims] 1. A cylindrical anode, a plurality of vanes radially arranged on an inner wall surface of the anode, and inner and outer strap rings in which the plurality of vanes are alternately connected.
In a magnetron including an antenna joined to any one of the plurality of vanes, an outer strap ring and an antenna are connected to one output extraction portion side of the vane, and the antenna is connected to the outer strap ring. A magnetron, which is arranged in contact with a peripheral edge and joined by plating of the strap ring to be electrically connected.