DE1028637B - Device for the electrical termination of hollow or coaxial lines or resonators, in particular short-circuit sliders - Google Patents

Description

GERMAN

The invention relates to a device for the electrical termination of hollow or coaxial lines or resonators using at least one movable inside the lines Short-circuit piece, which gives contact with the conductor or conductors themselves, and at least one with this assembled further short-circuit piece, which from one or two conductors through Insulation, ζ. B is separated by air and designed so that there is a capacitive short circuit of the Line represents, and is arranged so that it is on the side of the room or to be locked Line lies.

To terminate hollow or coaxial lines, it is known to use short-circuit slide that contact the leader himself. It is also known to use a terminating piece in hollow or coaxial lines to be installed, which is referred to as a so-called capacitive short-circuit slide. The mentioned Types of short-circuit slide can be used individually and of course result from multiple use in a row a better termination of a line or a better short circuit. As a special The form for a short-circuit piston with a series of several individual piston pieces is the Closing device with Z-shape known. The known arrangements do not allow a to achieve sufficient broadband termination of lines. The known arrangements are also shown in electrical aspects are often not stable enough.

The purely capacitive piston is known to be relatively narrow-band in its normal form, since the ratio of the length of the piston to the shaft length plays an important role in the locking effect plays. The galvanically acting pistons, however, have the disadvantage that they because of the fluctuating electrical contact resistance between the piston and the line a not precisely definable Short circuit, which changes even if the piston itself does not move will. In this respect it would also not be of great use to have several galvanic pistons to be arranged one behind the other. There are therefore termination devices have been created in which at the purely capacitive acting short-circuit piston in the direction of propagation of the wave and at a distance of a quarter wavelength a conductive one connected to it Disc is attached as a galvanically acting short-circuit piston. There are already orders known, in which line sections are connected in front of the contact piston, which discharge a current of the contacting bodies. These are transformation pieces that are included in an adjustable distance from the contact piston device for electrical termination of hollow or coaxial cables

or resonators, in particular

Short-circuit slide

Applicant:
Siemens & Halske Aktiengesellschaft,

Berlin and Munich,
Munich 2, Wittelsbacherplatz 2

Dr.-Ing. habil. Otto Zinke, Darmstadt,

and Dipl.-Ing. Ulrich von Kienlin, Munich,

have been named as inventors

to be ordered. This current relief has already been achieved by using a cup-shaped Short-circuit piston with its cavity to the energy-carrying line aligns and the distance selects between the bottom of the pot and the contact-making points so large that the contact points at a currentless point, d. H. in a place where a power node is formed. Such Pistons can be called current-relieved contact pistons. However, the known arrangements are strong frequency-dependent and therefore narrow-band and in many cases, especially with measuring devices or in the case of generators that can be tuned over a large range, cannot be used to advantage.

The invention is based on the object of providing a device of the type described in the introduction to improve the above-mentioned shortcomings of known embodiments.

This task is achieved with a device for the electrical termination of hollow or coaxial lines or resonators using at least one short-circuit piece movable inside the lines, which makes contact with the conductor or conductors themselves, and at least one further short-circuit piece assembled with this, which of one or both conductors by insulation, e.g. B. by air, separated and so formed is that it represents a capacitive short circuit of the line, and is arranged so that it is on the side of the room to be locked or the line to be locked, according to the invention

809 507/269

solved in such a way that the galvanically acting short-circuit piece in itself as a current-relieved short-circuit piston is constructed. The contact piston is preferably in the direction of the space to be closed Cup-shaped, the contact being made on the open side of this piston. One can in a simple manner also a known, purely capacitive short-circuit piston of Z-shape Use shape and on the boundary surfaces of a cavity of this short-circuit plunger, namely at the open point of this cavity, attach galvanically acting contact parts. The device according to the invention ensures that the by the short-circuit piston combination caused short-circuit level is maintained precisely defined and can be reproducibly adjusted. About that In addition, the input resistance of the device according to the invention is fairly free of active resistance components, so that a closed resonance space is only insignificantly damped.

It is in itself, for example from the "Telecommunications Technical Journal", 1954, Issue 8, p. 422 and 424, known to achieve a current relief in such a way that a contact piston a non-galvanic Piston is arranged upstream. The mode of operation of such an arrangement is based, however on the fact that the upstream non-galvanic piston already has a noticeable weakening the high frequency energy that comes to the actual contact piston takes place.

In the subject matter of the invention, however, it is important that the contact piston for itself is designed that its contacts are relieved of current. This results in a much better short-circuit effect in connection with the avoidance of the disadvantages of the known ones described in the introduction Devices achieved.

The device according to the invention ensures that the by the short-circuit piston combination caused short-circuit level is maintained precisely defined and can be reproducibly adjusted. In addition, the input resistance of the device according to the invention is fairly free of real resistance components, so that a closed resonance space is only insignificantly damped.

The invention is explained in more detail below on the basis of exemplary embodiments.

1 shows a combination between a purely capacitive and a galvanic one Pistons in a simple form. So

In Fig. 2 a device is shown in which a purely capacitive acting short-circuit piston of cup-shaped Shape is assembled with a purely galvanic piston of cup-shaped Gsetalt.

In the device shown in Fig. 3, the capacitively acting short-circuit piston is oriented so that it limits the line piece to be completed with its bottom.

A short-circuit piston with the known Z-shape can be seen from FIG. 4; however are on the delimitation walls that are located at the open point of a cavity and have a galvanic effect Contact parts 1 attached. Despite this slight mechanical change to one of the capacitively acting piston, an effect is achieved that significantly increases the importance of this piston elevated.

In Fig. S a device is shown, which consists of the combination of a capacitively acting piston consists of a Z-shaped shape with a pot-shaped, galvanically acting piston.

FIG. 6 shows a combination similar to that shown in FIG. 5; the cavities however, this device is made with dielectrically and / or ferromagnetically acting substances filled out.

Claims (3)

Patent claim 1. Device for the electrical termination of hollow or coaxial lines or resonators using at least one short-circuit piece movable inside the lines, which with the conductor or conductors themselves, and at least one assembled with this further short-circuit piece, which by one or both conductors by insulation, z. B. is separated by air and designed in such a way that it represents a capacitive short circuit of the line, and is arranged so that it is on the side of the room or the to be locked Line lies, characterized in that the galvanically acting short-circuit piece is constructed as a current-relieved short-circuit piston. 2. Apparatus according to claim 1, characterized in that the at the open point of the a cavity lying boundary walls of a capacitively acting short-circuit piston of Z-shaped shape galvanically acting contact parts are attached. 3. Device according to one of claims 1 and 2, characterized in that the cavities the short-circuit piston at least partially with dielectric and / or ferromagnetic Substances are filled out. Considered publications:
U.S. Patent No. 2,543,721;
FTZ, 1954, No. 8, pp. 422 and 424. 1 sheet of drawings & 809 507/269 4.58