DE1516753A1 - Short-circuit slide arrangement - Google Patents

Description

ELECTRIC AND MUSICAL INDUSTRIES *, * «**» " _Λ _ _{Λ n} " _r

, 1516 / bo

Blyth Road, Hayes / Middlesex, England

Hanover, 13 · 6 · 1966 FE / PT-BK / Sch / Be

Kurζ 9 closing slide arrangement

The invention relates to a KurζSchlussschieber «arrangement for use at high powers that is to be transmitted over a high-frequency line. The arrangement consists of a short-circuit slider with resilient contact means to provide the required contact between the short-circuit slider on the one hand and the high-frequency line to cause the other hand · Further, this high-frequency chokes are arranged to _v that a large resistance in the vicinity of said contact means is produced, and a low resistance transverse to the High-frequency line is created to create the desired short circuit *

Tunable short-ended valves are often used for high-frequency lines required, for example, designed as a waveguide • a can. Such short-circuit slides are known to be of this type executed that they are in contact with the wall of the high-frequency line by means of resilient contact fingers Disadvantage that they tend to form sparks and that overheating of the contact means also reduces the spring effect conditional, so that the contact resistance of the contact increases, which in turn increases the harmful warming effect described above.

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It is also known to use so-called high-frequency chokes at the same time to provide, in series with the point of discontinuity, a large " ee impedance while transforming a very low impedance into the surface plane of the slider, as is the case with » for example in Pig · 552b, on page 364 of the book "Radar-Inginesring" described by Donald G. Pink in the 1947 edition is·

The aim of the present invention is to show such a short-circuit slide, with contact means for producing the required Short circuit with the high-frequency line, which compared to known arrangements of this type for large © Services is suitable

Based on the short-circuit slide described at the beginning * Arrangement is therefore proposed, the resilient means

to arrange the contact arrangement in the bores of the short-circuit slide valve itself

The invention is to be "explained in more detail" in the following on the basis of an exemplary embodiment.

Pig * 1 shows the longitudinal section through a short-circuit slide arrangement constructed according to the invention. Here, the short-circuit slide is denoted by i, which is arranged displaceably along the wall of the waveguide 2 and has mechanical contact with the wall * in front of the forehead denoted by J.

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area of the Kurzaehluseschiebers 1 is a so-called λ / 4 throttle 4, the middle of two nozzles 5 with the Kursschiusa * slide is rigidly connected. The mentioned high frequency choke 4 has no contact with the waveguide wall * The one used as a throttle 4 acting part possesses such a lung that the distance from the end face 3 of the course error slide 1 to the corresponding Front of the choke a quarter of the waveguide wavelength in question amounts to. Between the end face of the short-circuit slide 1 and the one in front of it, it is hollow th Hoohfrequensdrossel 4 an air gap is also provided ...

.- '* ■■■' ■■■■■■

The distance from the face 3 to the inner bottom of the High-frequency choke 4 is also approximately a quarter the waveguide wavelength, making it a short-circuited represents λ / 4 line, which acts as an open line in the plane marked with B. Short circuit transformed, * which is effective between the corners of the end face of the choke 4 and the waveguide wall 2.

This creates a very large impedance, which is an open one Line between the rear corner of the short circuit slide and the wall of the waveguide 2 is generated, so that theoretically no current can flow, or no flashover between the short-circuit slide 1 and the waveguide wall 2 can be done, even if very high performances are transmitted. The high impedance at this point means that the current that has to flow from the waveguide wall 2 to the short-circuit slide 1 is greatly reduced.

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is adorned, if the übergangenideretand zwieohen the waveguide wall 2 and the short-circuit slide 1 are not kept rather small can be, ee is possible because * «at correspondingly high Power over the contact points, a flashover takes place, since the high impedance enables a high span to be achieved here. but it can eliminate this type of flashover that a very good contact is established between the short-circuit slide 1 and the waveguide wall 2 · This becomes possible without impairing the required mobility of the short-circuit slide 1 by the development of the invention described below

As already shown in Pig.1, the short-circuit slide 1 has a series of bores 6 of suitable diameter, which are arranged on the periphery of the short-circuit slide valve 1, in the vicinity of its end face 3, where good contact with the waveguide wall 2 is necessary is · Zn each bore 6, as illustrated FIGS · 2, a spring 7 is added to a spherical contact means 8 perpendicular to the waveguide wall · pressed in the operation state bore, spring and kontalctgebendes element "o dimensioned that about one third of the spherical Contact means 8 protrudes from the hole · By suitable dimensioning of the spring force and diameter of the

with a sphere, the required contact with the waveguide wall is obtained At the same time, the spring 7 from the high frequency electric current by this construction shielded so that there is hardly any risk of the spring overheating and thus the required contact

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with the waveguide wall 2 worsened * Di · according to the invention Training de «Kurzsohlussschieberg1 enables a constant good contact regardless of the respective position and movement of the short-circuit slide 1 and regardless of any which mechanical tolerances of the waveguide wall 2, so that an undesired flashover caused by sparking of the Contact points are practically avoided · The short circuit slide itself can be arranged adjustable within the illustrated waveguide in a manner known per se, as in the Figures was indicated schematically by the stamp 9 · The High-frequency choke 4 is suitable with the aid of a bolt 10 Distance rigidly connected to the Kurzschiusschieber 1! Where" at the distance to the end face 3 of the short-circuit slide 1 can be adjusted by means of the screw 11.

Notwithstanding the exemplary embodiment shown, the Short-circuit slide according to the invention can also be designed in such a way that that instead of the spherical contact means 8, they are spherical, and instead of the "helical" ones Springs 7 other spring shapes can be used *

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Claims (5)

Claims: 1 R 1 β 7 R 1) kurzschlusaachieber assembly for use at high Le is do · ^ S gene in a high-frequency line, consisting of a short · achlueaachieber with resilient contact means to cause the necessary contact between the Kurzachlusaschieber and the high-frequency line, wherein Hochfrequenzdroaaeln are arranged such daae a large resistance is generated in the NHho of the mentioned contact means and a low resistance is formed across the high-frequency line, for the desired short circuit, characterized in that
the resilient means (7) of the contact arrangement are arranged in bores (6) in the short-circuit slide (1). 2) Arrangement according to claim 1, characterized in that the required contact is brought about by contact means (8) which are arranged in cylindrical bores (6) and
be pressed against the wall of the high-frequency line by means of springs (7). 3) Arrangement according to claim 2, characterized in that helical springs are used as springs (7). 4) Arrangement according to claim 3, characterized in that dio Contact means (8) have a spherical surface. 5) Arrangement according to claim k _f, characterized in that the 909826/0643 ' ⁷ ' Bores ssur holder of the contact means (8) with a suitable Narrowing are provided. 909826/0643 Blank page