SU1429280A1 - Generator - Google Patents

Abstract

The invention relates to microwave radio technology and provides increased stability and increase in output power, as well as an increase in frequency tuning linearity. The generator is a short-circuited segment of a rectangular waveguide (OPV), in the E-1010 of which a metal plate (MP) 2 is located. In MP 2, slot 3 is made in the form of a cone, similar to the short-circuited end of the OPV, and three slots 4,5,6 located between the short-circuited end of the OPV and the slit 2 parallel to each other, perpendicular to the slit 3 and symmetrically about its longitudinal axis. Slots 5, 6 are interconnected by a gap 7. Between slots 4, 5 on W 2 there are two field-effect transistors (PT) connected in antiphase and made on the same chip 8 with a combined source connected directly to MP 2. Other PT electrodes are connected through capacitors 9-12. On the capacitors 10, 12 are varicaps 13, 14, connected in series with each other. The bias is fed to them through the power supply circuit 16. When the bias is supplied to the PT, the power supply circuits 15 in the resonant system excite microwave oscillations, the frequency of which is determined by the parameters of the crystal 8, the PT and the parameters of the resonant system formed by gaps 3-7. The microwave power is output through slot 3. 1 c.p. f-ly, 2 ill. .4g Uf tV / § (L 4: to so ko oo ffm iin Ci fl

Description

This invention relates to a microwave radio and can be used; to generate vibrations.

: The goal of the invention is to increase the stability, increase the output power and frequency tuning linearity.

Figure 1 shows the structure. ; hegaerator; figure 2 - section aa in FIG.1.

I The generator contains a short-cut from | a cutting edge 1 of a rectangular waveguide, in 1E-SH10SCOST of which a metal plate 2 is located, in which mutually perpendicular, first 3 and second A slits are made, the slit 4 is symmetric about the longitudinal axis of the slider 3. Parallel slits 4 the third 5 and the fourth 6 slots are symmetrical with respect to the longitudinal axis 3 and located between the slit 3 and 1 of the short-closed wall of segment 1, and | connected by a fifth slit. 7, the longitudinal axis of which coincides with the axis of slot 3 ...

: The first and second field transitions of pfci are made on a single crystal. With a d-shaped source installed between slots 4 and 5. on plate 2.

The drain of the first transistor is connected via the first capacitor 9 to the plate 2 at the junction of the slots 3 and 4; the first transistor is connected to the first transistor ijiepeB the second capacitor 10, located between slots 5 and 6.; The drain and the gate of the second transistor are connected to the plate 2 through respectively the third 11 and fourth 12 capacitors located symmetrically with the capacitors 9 and 10 relative to the longitudinal axis of the slot 3. The first 13 and second 14 varicaps are located on the capacitors 10 and 12 interconnected counter-sequentially. The supply circuits 15 supply the bias to the transistors, and the supply circuits 16 supply the bias to the varicaps 13 and 14.

The generator works as follows.

Through the power supply circuit 15, the first and second field-effect transistors are applied to the bias voltage, which results in microwave oscillations in the resonant system, whose frequency is determined by the parameters of the crystal 8 of the transistors and the parameters of the resonant CHCTeN5) i formed by slots 3-7 Gap 3 serves as a microwave power output.

The implementation of transistors on a single chip 8 and their antiphase inclusion with respect to each other allows to reduce the high-frequency components of the noise, which improves the spectrum of the high-frequency signal and thereby increases the short-term stability

The successive switching on of the varicaps 13 and 14 compensates for the non-linear character of the dependence of the capacitance during the tuning in the frequency range, which helps to reduce the side components of the gene- spectrum. signal.

Claims (2)

1. A generator containing a short-: closed segment of a rectangular waveguide, between the wide walls of which in E-S1OSCOSTI there is a metal plate, in which the first and second slots are mutually perpendicular, interconnected with each other in the first slot in the form of a cone, suzhak tsegos to the short-circuited end of a segment of a rectangular waveguide and the second slot is symmetrical about the longitudinal axis of the first slot, the first field-effect transistor, the source of which is connected directly to the metal plate, and st is connected via a first capacitor with a metal plate at the junction of the first and second slots, the shutter is connected to a metal plate through a second capacitor, which is made in order to increase stability and increase output power third and fourth slits parallel to the second slit, placed between it and the short-circuited wall of a segment of a rectangular waveguide and connected by a fifth slit, the longitudinal axis of which coincides with the longitudinal axis of the first slit and the perpendicular to the longitudinal axes of the third and fourth slits, while between the second and third slots are set the first and second field effect transistors are inserted, the first and second field effect transistors are .na single chip with a combined source, a second capacitor is located between the third and fourth 3 .C slots on one side of the longitudinal axis of the first slot, the drain of the second transistor through the inserted third capacitor is connected to a metal plate at the junction of the first and second slots, and the gate through the inserted fourth capacitor is connected to a metal plate between the third and fourth slots The third and fourth capacitors are located on the other side of the longitudinal axis of the first slot. 2. The generator according to claim 1, characterized in that, in order to increase the linearity of the frequency tuning, the first and second varicaps, placed respectively on the second and fourth capacitors and interconnected in series, are introduced into it.   / 9g.1