SU1385161A1 - Coaxial switch - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to increase the switching power. The coaxial switch contains external and internal conductors 1 and 2 and a magnetically controlled switching element made in the form of a metal rod (MC) 3, the ends of which are formed by opposite poles of permanent magnets. The inner conductor 2 is made up of segments 6 and 7, separated by a dielectric gap made in the form of dielectric washers 8 and 9. Inside the inner conductor 2 there are additionally made holes arranged coaxially in its segments 6 and 7. MC 3 is placed in holes with the possibility displacement along the axis of the inner conductor 2 and is separated from the inner surface of the segments 6 and 7 by a dielectric layer, while the length / mSMS 3 is + + / DP, where Ye is the MF wavelength of the working range in the dielectric layer; L is the length of the dielectric gap. Hole m. B. limited to resistant dielectric shields 16 and 17, respectively. The length of one hole is A, e / 4, the length of the other hole is not less than the length of MC 3. Segments 6 and 7 m. B. equipped with air ducts 18 and 19. On the inner surface of the external conductor I in the section of dielectric mounts 8 and 9 m. b. The metal ring 20 is fixed, and electromagnetic coils 21 and 22 are fixed on its outer surface. By using the contactless connection of segments 6 and 7 of the inner conductor 2 and eliminating parasitic resonant effects in the operating frequency range, the coaxial switch provides an increase in switching power. 2 hp ff, 4 ill. 3 (L 00 CX) ate O5

Description

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one

This invention relates to radio engineering, in particular, to devices for switching high power microwave signals.

The purpose of the invention is to increase the switching power.

FIG. 1 and 2 show a coaxial switch, respectively, in the on and off states; in fig. 3 - magnetically operated switching element; on. 4 - output segment of the inner conductor.

The coaxial switch contains outer 1 and inner 2 conductors and a magnetically controlled switching element, made in the form of metal-conic of ferromagnetic material, and cylindrical permanent magnets 4 and 5, closed by caps 24 and 25 of non-ferromagnetic metal. The outer surface of the metal rod 3 may be coated with a material with high electrical conductivity, for example, a thin layer of silver.

Coaxial switch operates as follows.

In the on state (Fig. 1), the metal rod 3 is simultaneously in the input and output segments 6 and 7 and connects them without contact, since it forms with them two quarter-wave open coaxial segments.

lines, the input resistance of which is close to the rod 3, which has at the ends different to zero. The metal ring 20 on the nominal magnetic poles, which against the inner surface of the outer conductor 1 eliminates the surge of the impedance in the dielectric section 8 and 9, ensuring coaxial switch matching and low signal loss, dielectric gap, 20 When the voltage is applied on electromagnetics, for example, in the form of dielectric coils 2 and 22 under the action of forces

the repulsion and attraction of the metal rod 3 begins to move towards the output segment 7. At the expense of creeping out, for example, by opposite poles of the permanent magnets 4 and 5.

The inner conductor 2 consists of input 6 and output 7 segments, slotted washers -8 and 9.

Inside the inner conductor 2, holes 10 and II are additionally made,

Placed coaxially in its inlet and outlet of the air gap 14 between fluorine segments 6 and 7. The metal rod 3 is placed in the openings 10 and 11 with the possibility of moving along the axis of the inner conductor 2 and separated from the inner surface of the inlet 6 and outlet 7

the formation tubes 12 and 13 reduce the electrical length of the coaxial line formed by the output segment 7 and the metal rod 3, and exclude the possibility of resonant breakdown in the working

ferromagnetic material, and cylindrical permanent magnets 4 and 5, covered with caps 24 and 25 from a non-ferromagnetic metal. The outer surface of the metal rod 3 may be coated with a material with a high electrical conductivity, for example a thin layer of silver.

Coaxial switch operates as follows.

In the on state (Fig. 1), the metal rod 3 is simultaneously in both the input and output segments 6 and 7 and connects them without contact, since it forms with them two quarter-wave open segments of coaxial

the air gap 14 between the fluoroplastic tubes 12 and 13 reduces the electrical length of the coaxial line formed by the output segment 7 and the metal rod 3, and eliminates the possibility of resonant breakdown in the working

segments of the dielectric layer, made in about the frequency range.

o and p jTi p g to (Tt n ch ci. „..,

as a fluoroplastic tube 12. The dielectric layer in the output segment 7 can be made in the form of two fluoroplastic tubes 12 and 13, separated by an air gap 14 located at a distance of

When the metal rod 3 is completely in the output segment 7 (Fig. 2), the coaxial switch is in the off state. The magnitude of the decoupling between its input and the OPLE / 4 output from the dielectric washer 9, where 35 is determined by the thickness of the dielectric washers

AS is the wavelength of the average frequency, 8 and 9.

lero range in PTFE. A thin-walled tube 15 can be installed between the coaxial cut-off and the fluoroplastic tubes 12 and 13. segment 6 may be limited by the resistant dielectric washer 16, and

40

bodies need to change the direction of the current in the electromagnetic coils 21 to 22 to reverse. To hold the metal rod 3 in one of the extreme positions, when the electromagnetic coils 21 and 22 are de-energized, permanent magnets (not shown) can be used, installed on the input and output side of the coaxial length, and hole 11 in the output switch.

CHU- /

the travel segment 7 is limited to the thrust dielectric washer 17, and Dietin’s not less than the length of the metal rod 3. The inlet 8 and outlet 7 segments can be equipped with air ducts 18 and 19.

Thus, due to the use of contactless connection of the input 6 and output 7 segments of the inner conductor 2 and the exclusion of spurious resonance phenomena in the working frequency range 50, the proposed coaxial switch

On the inner surface of the outer conductor 1, in the area of the dielectric washers 8 and 9, a metal ring 20 can be fixed, and on its outer surface there are electromagnetic coils 21 and 22.55

The metal rod 3 may consist of a central part 23, made 50

bodies need to change the direction of the current in the electromagnetic coils 21 to 22 to reverse. Permanent magnets (not shown) mounted on the input and output side of the coaxial switch can be used to hold the metal rod 3 in one of the extreme positions when the electromagnetic coils 21 and 22 are de-energized.

Thus, due to the use of contactless connection of the input 6 and output 7 segments of the inner conductor 2 and the exclusion of parasitic resonance phenomena in the working frequency range, the proposed coaxial switch

provides an increase in switching power compared to the known.

Claims (3)

1. A coaxial switch containing external and internal conductors and a magnetically controlled switching element mounted coaxially with an internal conductor that can be moved along its axis, the internal conductor being composed of an input and output segments separated by a dielectric gap, characterized in that increasing the switched power, the magnetically controlled switching element is made in the form of a metal rod having different magnetic poles at the ends, is placed in utri its inner conductor in the holes, made coaxially in addition its input and output segments, and is separated from the inner surface of the dielectric layer, wherein the length / st metal, the rod is .e / 2 + / dg1 where Re - wavelength W 6 1 / H / x UCH AUCH ////// U // I ////////// // // /// // // //// // // B} (a8 sixteen the average frequency of the working range in the dielectric layer; / dp is the length of the dielectric gap, and the hole length in the input segment of the inner conductor is equal, and the hole length in the output segment of the inner conductor is not less than the length of the metal rod. 2. The switch according to claim 1, characterized in that the dielectric layer is made in the form of a fluoroplastic tube. 3. The switch according to claim 1, characterized in that the dielectric layer in the output segment of the inner conductor is made in the form of two fluoroplastic tubes separated by an air gap located at a distance of A, e / 4 from the dielectric gap. / FIG. 2 Fig.Z ////////////// А //////// L II , nineteen