JPH04106841A - Travelling-wave tube for mounting on satelite - Google Patents

Abstract

PURPOSE:To make it possible to set the optimum size electrically, thermally, and mechanically in compact size with light weight by using trapezoid supporting plates as a case cover too. CONSTITUTION:A travelling-wave tube is composed of a slow-wave structure l in which microwave is amplified by reciprocal action with electrons, a radiation cooling collector 7 which captures the reciprocally acted electrons and discharges the generated heat to the space by radiation, a case substrate 8 which discharges the heat of the slow-wave structure l by transmission, a disk- like holding plate 9 to hold the collector 7, a case cover 10 to shield electromagnetic waves from the slow-wave structure 1, and trapezoid supporting plates 11 to support the holding plate 9 and the case substrate 8, and the trapezoid supporting plate 11 composes a part of the case cover. By making the structure in this way, two trapezoid supporting plates 11 are fixed in the positions close the slow-wave structure l. As a result, the size of the collector 7 is made the optimum thermally and electrically and further the disk-like supporting plate 9, trapezoid supporting plates 11, and the case substrate 8 are made small.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a traveling wave tube, and more particularly to a traveling wave tube for use in a satellite having a radiation-cooled collector.

[Conventional technology]

A conventional traveling wave tube onboard a satellite having a radiation-cooled collector is an electron gun (not shown) that shoots electrons.

It consists of a slow-wave circuit that amplifies microwaves by interacting with electrons, a collector that captures the interacted electrons, and a case that houses and firmly supports and fixes them. In general, collectors for high-power traveling wave tubes mounted on satellites are of the radiation-cooled type in consideration of heat cooling. Examples of conventional collectors are shown in FIGS. 2(a) and 2(b). This radiation-cooled collector 2 is fixed to a disk-shaped holding plate 3, and further supported by a case substrate 5 by a trapezoid-shaped support plate 4 that ensures sufficient vibration resistance. In addition, the traveling wave tube installed inside the satellite is equipped with a slow wave circuit 1 to prevent it from adversely affecting other electronic equipment.
must be shielded from electromagnetic waves generated by The case cover 6 has this shielding effect and is fixed to the case substrate 5 and the holding plate 3 in close contact with the conductive adhesive.

[Problem to be solved by the invention]

In this conventional traveling wave tube for use in satellites, the shape and dimensions of the slow wave circuit are determined mainly by electrical characteristics, and the collector has internal thermal characteristics calculated from the pole temperature and power supply to the collector electrode. The dimensions are determined by the arrangement of the terminals and the arrangement of screws fixed to the disc-shaped holding plate. Satellite onboard equipment is required to be highly reliable and /J'% lightweight. If the collector shape is small, it is necessary to reduce the gap between the two trapezoidal support plates 4, but the dimensions of the slow-wave circuit have already been determined, and due to the structure, a case cover must be inserted between the slow-wave circuit and the trapezoidal support plate. Therefore, the trapezoidal support plate must be placed on the outside of the case cover with a slight gap.
There was a problem in that miniaturization and weight reduction were restricted.

[Means to solve the problem]

The traveling wave tube for use in a satellite according to the present invention has radiation, cooling-resistant collector,
It has a disc-shaped holding plate that holds the collector and a trapezoidal support plate that supports and fixes the disc-shaped holding plate to the case substrate,
It is characterized in that the trapezoidal support plate forms part of the case cover.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1(a) is a side view of one embodiment of the present invention, and FIG. 1(b) is a side view of one embodiment of the present invention.
) is a sectional view taken along line BB in FIG. 1(a). A slow wave circuit 1 in which microwaves interact with electrons and are amplified; a radiation cooling collector 7 that captures the interacting electrons and radiates the generated heat into space; A case substrate 8 that dissipates through conduction, a disc-shaped holding plate 9 that holds the collector, a case cover 10 that shields electromagnetic waves from the slow wave circuit 1, and supports the holding plate 9 and the case substrate 8, and It is composed of a trapezoidal support plate 11 which also serves as a case cover. That is, in this embodiment, the case cover 10 is connected and fixed to the trapezoidal support plate 11, and the upper part of the case cover 10 extends to the disk-shaped holding plate 9 to shield electromagnetic waves.

With this structure, the two trapezoidal support plates 11 can be fixed at positions close to the slow wave circuit 1. Therefore, the dimensions of the collector 7 can be optimized depending on the thermal and electrical characteristics, and the disk-shaped holding plate 9, the trapezoidal support plate, and the case substrate can also be made smaller.

〔Effect of the invention〕

As explained above, since the present invention has a structure in which the trapezoidal support plate also serves as a case cover, the trapezoidal support plate can be fixed at a position close to the slow wave circuit, and the dimensions of the collector of the traveling wave tube and the vicinity thereof can be reduced. It has the advantage that it can be set to the optimum dimensions electrically, thermally, and mechanically without being subject to physical constraints, and can be made smaller and lighter.

[Brief explanation of drawings]

FIG. 1(a) is a side view of one embodiment of the present invention, and FIG. 1(b) is a side view of one embodiment of the present invention.
) is a sectional view taken along line BB in FIG. 1(a), FIG. 2(a) is a side view of the conventional example, and FIG. 2(b) is a sectional view taken along line AA in FIG. 2(a). 1...Slow wave circuit, 2.7...Radiation cooling collector, 3
．． 9... Disc-shaped holding plate, 4... Trapezoidal support plate, 5° 8... Case substrate, 6... Conventional case cover 1
0... Case cover of the present invention, 11... Trapezoidal support plate of the present invention. Figure 1 7: 輻阜ngaψ]I, Tata

Claims (1)

[Claims] a radiation-cooled collector, a disk-shaped holding plate that holds this collector, a trapezoidal support plate that supports this holding plate on a case substrate,
1. A traveling wave tube for use in a satellite having a slow wave circuit, a case substrate, and a case cover, wherein the trapezoidal support plate constitutes a part of the case cover.