SU764006A1 - Resonator system for klystron-type devices - Google Patents

Description

The invention relates to electronic microwave devices, in particular to klystron-type devices (klystrons, twistrons), and can be used (but in microwave devices with coupled active and passive resonators, to expand the frequency band or to obtain a frequency response of a given shape in amplifying klystrone systems of coupled resonators are used. Their use of rationing is mainly at the entrance and exit of the klystron. Coupled resonator systems can consist of two or more JLj resonators. resonators with an electron beam through an interaction region, one or several resonators (active resonators) can be connected to a concentrated axial electric field. Additional (passive) resonators are connected to active resonators through coupling elements and are usually spatially separated, which leads to An undesirable increase in the dimensions of the resonant system and the entire instrument. A system of resonators of klystron-type devices 2 is known, containing an active resonator and a passive resonator. The volume (active) resonator is connected to the electron flow through the interaction region, and the coaxial (passive) resonator located perpendicular to the electron flow is inductively coupled to the volume resonator. The passive resonator is a half-wave short circuit. Both the volume and the coaxial resonator can have devices for changing the frequency, quality factor and coupling of me5 (one resonator. The disadvantage of the system is its structural complexity, which eliminates the implementation of active and passive resonators in one vacuum volume. In addition, the system has overall dimensions. The purpose of the invention is to reduce the weight and dimensions of a system of coupled resonators, as well as to ensure the adjustment of the connection in the system of coupled resonators. The goal is achieved by the fact that The passive resonators are made in the form of a single volume with drift pipes, on one of the side walls of which a rod is fixed, facing the drift pipes, forming a passive resonator together with the surrounding walls, so that the rod can be adjusted to be movable. 1 and 2 shows the resonator of the klystron-type device in two pro-actions; FIG. 3 and 4 show the resolver of the klystron-type device with a shortened resonant rod in two projections; Fig. 3 shows a klystron-type device resonator with a bellows for additional adjustment of the rod length,

The resonator system contains: a vacuum resonant volume 1 with a co-produced electric field in the interaction region of 2 electron flux with a microwave field formed by passing tubes 3, a resonant rod 4 with length t, fixed at one end on the flexible membrane 5, the other end facing to interaction areas, communication elements 6,7, made in the form of communication loops, and tuning element 8.

As shown in Figs. 1.2, the resonant rod 4 is introduced into the resonant volume with a concentrated electric field in the region of interaction of the electron beam 2 with the microwave field. The rod 4 is attached at one end to the wall of volume 1, and for the selection of the connection by changing the distance to the interaction region 2, the rod 4 can be secured, for example, using a flexible membrane 5. The other end of the rod 4 faces the interaction region 2. The resonant rod 4 forms with the walls of volume 1 a coaxial type line closed at one end and open at the other end, the equivalent of which is equal to a quarter of the wavelength. Communication with a load or a generator (not shown) can be carried out both on the side of the resonant volume 1. and on the side of the resonant rod 4 using inductive coupling elements 6.7, made in the form of loops.

As shown in Fig.3,4, the resonant rod 4 has a length t and consists of. two parts: the rod 9 and the branched surface 10, which allows to reduce the axial length of the entire system and its dimensions.

In one of the variants of the construction of these resonators, presented

in FIG. 3, a part of the resonant rod 4 for the purpose of adjusting the length F is made in the form of a bellows 11. This allows the connection between the active and passive resonators to be changed. The change in the resonant frequency of the active resonator is carried out by setting element 8, and the change in the resonant frequency of the passive resonator in small limits

membrane deflection account 3 or by

changing the length of the element 11 (Fig.5). The change in the coupling capacity between the active and passive resonators (the systems of the coupled resonators are due to the change in

the distance between the resonant element 4 and the interaction region 2.

In the proposed system of coupled resonators, made in one vacuum volume, adjustment is performed to obtain the required characteristics without the use of additional vacuumized communication elements. This increases the reliability of the design and allows to obtain a compact resonant circuit with strip

characteristics with small weight and dimensions.

Claims (2)

Invention Formula 1, A system of resonators of a klystron-type device, containing interconnected active and passive resonators, characterized in that, in order to reduce weight and dimensions, active and passive resonators are made in the form of a single volume with drift tubes, on one of the side walls of which a rod is fixed, facing the drift tubes forming a passive resonator along with its surrounding walls. 2. A resonator system according to claim 1, characterized in that in order to be able to adjust the communication, the rod is forcibly movable. Sources of information taken into account in the examination 1. Khaykrov A.V. Power amplifiers on multiresonator klystrons. M., Svy, (1964, p. 8-19). 2. US patent I 2934672, cl. 315-3. , 4c, published 1995 (prototype).