SU50169A1 - Magnetron device - Google Patents

Description

The present invention relates to a four-anode magnetron switching circuit, in which an independent excitation is achieved by appropriately connecting the anode segments and selecting various high anodic voltages for the adjacent pair of segments.

In the attached drawing of FIG. 1-3 depict electrical circuits explaining the invention.

It is already known to use for the purposes of amplifying the energy of high-frequency oscillations, symmetrical, neutralized by small additional capacitances, anti-tact amplifiers (Fig. 1), where the capacitances of the anode-grid C together with the neutralizing capacitors C form branches of the Wheatstone bridge. FIG. 2 is the equivalent circuit of FIG. 1 n. It gives an opportunity to imagine the bridge nature of the circuit more clearly. The control alternating voltage is CONDUCTED to the grids GI and O of counter-powered lamps; the amplified alternating voltage U is improved from the anodes A and A. Such amplifiers with independent excitation can be applied, however, only for WAVES only a few Meters are used.

Independent excitation at decimeter waves has hitherto encountered difficulties caused by the possibility of neutralizing such transmitters, as a result of which the energy of the source cascade was pumped through the intra-tube capacitance directly into the anode circuit. In most shortwave circuits, for example, in circuits with a retarding field and in feedback schemes, the finiteness of the flight time of electrons greatly complicates the problem of extraneous excitation.

In accordance with the present invention, a magnetron with an anode divided into four parts is used as a transmitter with independent excitation for decimeter waves. In the magnetron, the electron travel time does not play such a significant role, since on the one hand the applied anode voltages are quite high and so on the other hand the control of electrons with a high frequency

The Scaffolding BflfletCH with hiembrant stresses near the cuts. The time required to reach the anode by an electron that has fallen under the influence of the field near the cut is short compared with the time of one oscillation.

Neutralization when using a magnetron with an anode divided in four parts, is particularly simple. When the anode segments are symmetrically formed, the latter have the same capacity and self-induction with respect to the supply conductors. The four segments are included in such a way that the bulk containers form the branches of the Wheatstone bridge (Fig. 3).

Segments / and 2, to which the control alternating voltage is supplied and play the role of control electrodes, segments 3 and -rolls of anodes, from which the useful output voltage STd, is removed. Due to the symmetry of the circuit, the electrode capacitances are symmetrical to the neutrodin capacitors.

If necessary, a more perfect symmetry of the anode device can be achieved by a corresponding elongation (outward) of the segments I and 2, as shown in FIG. 3

The action of segments / and 2 as control electrodes, and segments 3 and 4 as anodes is achieved by an appropriate choice of voltages and / 2. The voltage Ui is chosen so low that in the presence of a back magnetic field the electrons do not hit segments 7 and 2 , therefore, these latter would only control the current flowing to segments 3 and 4,

without power consumption, on itself. §Fb control is as follows.

If, for example, segment 7 has a positive, and segment 2 has a negative voltage with respect to a constant voltage Ui, then electrons with a corresponding magnetic field flow to segment 2. When voltage changes on segments 7 and 2 to reverse electron flow, directed to segment 4. Segments 5 and 4 are under positive voltage to ensure their normal operation.

This inclusion, which is the subject of the present invention, is not limited to a magnetron provided with an anode divided into four parts. Likewise, lamps with more than four segments can be used. The individual segments in this case should be combined into four symmetric groups; what is needed to fulfill the idea of the invention.

The subject matter of the invention.

A magnetron device with independent excitation and using a magnetron with four anode segments or four symmetric groups of anodic segments, characterized in that two other segments or groups of them are summed up against two lying segments or groups of them included in the circuit from which amplified alternating voltage is derived.