DE2345047C2 - Slidable terminating resistor for a coaxial flange connector - Google Patents

Description

roller (3) is reduced and the IsoHerstoffwalze is in the structure according to the invention

BeTe Ch ₁ of the jump in cross section of the inner workings _lte rs ^The ™ _{fixed aufgebrac} S _te electrically breitbandfg

(2) stu enform.g is deposited * ffl d hibb I

i.e.

_g g

) stu enform.g is separated from

3. Slidable terminating resistor according to gg «ßte ^ o _{ch ze} ntrically superimposed and thus no loading-claim 1 or 2, characterized in that lead * W. _sogenann th reference ^ hurrying Innenle.ter (2) ends at a slight spacing front "ij ^ f ^ _κ ⁸ _{Αη5 ά Ηβ β εη} to the respective end wall of the Meßzur Isolierstoffwalze. Resistance aurui λ takes over the iuf dem

4. Sliding can be done by terminating resistor egg * ₅ object. Furthermore, with d. In addition, one of claims 1 to 3, characterized in that the inner conductor (2) is connected to the inner conductor by high rstoffwa ^
Clamping cone (5) can be determined in its axial position s ^ on £ ™ es test object.Nj ^

^1S 5. Slidable terminating resistor after 30 roll with the inner conductor on the stop-damn occur one of claims 1 to 4, characterized thus no errors due to length tolerances. ^ F-'n denotes that to limit the axial locking flange be inserted. The ability to slide the inner conductor on the inner conductor (2) is also particularly advantageous if the connection between the stop ring (7) and a connection point in the outer conductor (1) is free of compressive stresses
associated recess with one of the vorgesehe- 35 By reducing the diameter of the inner displacement length corresponding superiors nenleiters in Bere.ch the Isoherstoffwalze _sehenist and a step-shaped deposition of the Isolierstoffwalze

6. Movable terminating resistor according to the area of the jump in cross-section of the inner conductor one of claims 1 to 5, characterized by the capacitively acting characteristic impedance error draws that to move the absorber 40 transition from the, sol.stoffgefullten line in the element (4) a sliding ring (9) is provided, the air-filled line section Breitband.g kompenauf the outer conductor (1) of the coaxial line.

Slidable cut and over a broadband compensation of the blind capacity,

Pin (13) with the absorber element in engagement by the cross-sectional jump in the connector

_ste ht 45 of the test object occurs is achieved in that

7. Slidable terminating resistor after the inner conductor at a short distance from the front 6, characterized in that the pin (13) ends the end wall of the insulating material roller.

by means of a sliding ring (9) partially encompassing- In an advantageous embodiment of the areas of the invention Clamping spring (12) is held. State is also provided that the inner conductor through

50 a clamping cone can be determined in its axial position that to limit the axial displaceability of the inner conductor on the inner conductor a stop ring and

- In the outer conductor an associated recess with a

corresponding to the intended displaceability

55 length is provided that for moving the

The invention relates to a displaceable sorber element, a sliding ring is provided on which Terminating resistor for a coaxial flange connector to the outer conductor of the coaxial line section, consisting of a coaxial line and slidably rests on top of a pin with the section with in this between the displaceable sorber element is in engagement, and that the pin The inner conductor and the outer conductor can be displaced by means of a sliding ring that partially encompasses the sliding ring arranged absorber element. Clamping spring is held.

In the case of known terminating resistors of this type, further details of the invention are followed by the connection to a test object in the standing manner shown in the figures, that the freely suspended inner conductor of the coaxial embodiment is explained in more detail. It shows
Termination resistor initially advanced so far 65 F i g. 1 the displaceable terminating resistor is that it was inserted into the corresponding contact receptacle, in a longitudinal section, for the sake of clarity with polarized connectors, for example, the pin or the socket of the device under test connection omitted because of a central line section, and in

F i g. 2 shows the absorber element of the sliding terminating resistor.

The in F i g. 1 illustrated sliding terminating resistor consists of the outer conductor 1 with the flange 14 at one end, the one at the end of the Flange 14 protruding from the outer conductor, inner conductor 2 displaceable by a few millimeters, the is centered by the contact piece 3, which is arranged between the inner conductor and the outer conductor, displaceable Absorber element 4 and the clamping cone 5, which is on the opposite of the flange 14 The end of the terminating resistor is arranged and is used to clamp the inner conductor. The contact element 3 consists of an insulating roller, for example from the one known under the name Teflon Insulating material, and is on the end area of the inner conductor, which is offset in its diameter, on the with applied to the flange connector to be contacted end with a press fit. The insulating material roller 3 is located is about half of its length in the outer conductor 1 of the terminating resistor and thus serves the centering of the inner conductor 2, while the other, protruding from the outer conductor 1 part of the Isoliarstoffwalze 3 in the connection of the Abschlussv-id.rstandes is inserted with a test object in the outer conductor with the flange 15 and thereby at the same time the centering of the outer kiter of the terminating resistor with respect to the flange? 5 of the DUT takes over. The insulating material roller 3 is on the rear end wall, that is in the terminating resistor Lying front wall, stepped off, whereby the capacitive acting wave resistance error at the transition from the line filled with insulating material, i.e. the line section on which the insulating material roller is in place and thus fills the space between the inner and outer conductors with insulating material, is broadband compensated in the air-filled line section. The inner conductor 2 ends under one small distance to the front end wall of the insulating roller 3, whereby the through the for this connector typical cross-sectional jump resulting interference capacitance is compensated broadband. Further there is a stop ring on the inner conductor 2, on the end piece opposite the insulating roller 7, which limits the sliding path of the insulating roller 3 and thus a sliding out of the outer conductor 1 prevented. The stop ring 7 is arranged in the area on the inner conductor 2 which corresponds to the in its inner diameter is opposite the stepped end region of the outer conductor 1. In this The stop ring 7 is guided in a stepped expansion of the inner diameter of the outer conductor 1. In This end area is a cup-shaped closure element 16 screwed with a frontal breakthrough for the inner conductor 2, to which the Clamping cone 5 encompassed by the threaded ring 6 connects. The inner conductor 2 is completed by the Handle 8. Between the inner and outer conductors of the terminating resistor is the movable absorber element 4, which is designed as a hollow cylinder and in the direction of the flange connector to be contacted is tapered, arranged. The one on the outer circumference is used to move the absorber element 4 of the outer conductor 1 arranged sliding ring 9 with the bearing rings 10 and 11, for example from the below plastic known as Teflon. The sliding ring 9 is supported by one in a recess of the Circumferentially arranged clamping spring 12 which is riveted to a pin 13 which is inserted into the absorber element 4 intervenes. In the outer conductor 1 there is a longitudinally extending groove in which the into the absorber element 4 engaging pin 13 is guided.

The connection or contacting of the sliding terminating resistor with a device under test happens in the following way. First, the contact piece 3 (insulating roller) in the flange 15 of the DUT inserted and the outer conductor connection by pressing together the flanges 14 of the Terminating resistor and 15 of the device under test with the known connecting parts, for example centering ring and clamp. Then, by pressing the handle 8, the one on the inner conductor 2 Pressed-on insulating material roller 3 pushed up to the stop on the inner end wall of the flange 15 of the test object. Finally, with the threaded ring 6, the clamping cone 5 is pressed against the inner conductor 2. The inner conductor is mechanically sufficiently locked and the terminating resistor is electrically ready for use.

The inherent error of the absorber element 4, which is heavily tapered for reasons of adaptation (cf. FIG. 2), can easily be determined during the measuring process by moving the absorber element by a maximum λ / 2 distance. The magnitude of the measured reflection factor r _x ^x is then additively r _x max or subtractively r _im t _n, the inherent error ta · _{The true reflection factor} r of the measurement object is calculated from half the sum of r imaz + r, _m < _B. The lower frequency of use of the displaceable terminating resistor depends, among other things, on the maximum displacement _{length of the absorber element (A 0/2} length). The displacement path of the longest version of a displaceable terminating resistor according to the invention is 102 mm, for example. This means that the fault in the absorber element can be determined and eliminated down to a lower frequency of around 1.5 GHz. The upper frequency limit results from the inner dimensions Di of the outer conductor, and the possibility of propagation of higher wave types depends on Di, e.g. B. des // "- mode. For a terminating resistor for the 50-ohm coaxial flange connector 1.4 / 4.4, that is to say for an inner diameter of the outer conductor Di = 4.4 mm, the upper limit frequency / _{C1 is} approximately 21 GHz. The typical reflection factor for such a terminating resistor remains below 0.01 up to 18 GHz.

1 sheet of drawings

Claims (2)

Can be cut. Then the outer conductors are inserted and screwed together. The patent claims: the inner conductor is only centered by the contact with the test object. Practically hardly 1. Sliding terminator for a ^au ^ ^a ™ ^s eccentricities of the respective Innenleiterkoaxialen socket connectors, vermemua consisting of the fifth _{however, characteristic} impedance errors in a coaxial line section can be in this * V ™ ^e _e Sert. between the sliding inner conductor and the die nie ™ _{ü the task of} being one Outer conductor displaceably arranged absor- J ^ _{1> hbaren terminating} resistor of the input beber element, characterized ™ ^{Autovermietung D} _{™ M in} such a way that the that the inner conductor (2) to the one with the flange io ^sc ^^ T _{disadvantages be} known arrangements of hidden connector (15) to contact end called ^ien ™ by means of a firmly attached, electrically forged ¹ ^ ■ _{wjrd gß of the invention in the} fitted insulating material roller (3) centered in the outer This: Aurg ^ ^ _inner conductor on the with the head (1) is stored. FWrh connector end to be contacted with 2. Sliding terminator after arrival x ₅ ^ "SeftorSSebfBchten, electrically matched saying 1, characterized in that the transit ^ιη ^ ^ _ζ / _ze ^g _ntrisch mounted _{in the} outer conductor diameter of the inner conductor in the region of Isolierstoff- lsclierstonw.uic