RU2546305C2 - Coaxial-to-stripline adapter - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: device is related to superhigh-frequency (SHF) electronic equipment and may be used in SHF wireless devices for the purpose of electrical contact provision between either inner conductor of coaxial-to-stripline and stripline (contact pad) of SHF substrate and contact pairs of coaxial-to-stripline adapters at interunit connection. Coaxial-to-stripline adapter represents a plug-in set socket; it comprises a body with flange being outer conductor, the central conductor (socket) being inner conductor, contact concentric spring having electric contact with body and forming a common outer conductor with body, two dielectric bushings.

EFFECT: reduction of design requirements to accuracy of dimensions coupling at junction to the counterpart.

5 dwg

Description

The device relates to electronic microwave technology and can be used in microwave radio devices to ensure reliable electrical contact between the inner conductor of the coaxial strip junction and the strip (contact pad) of the microwave substrate, and between the contact pairs of coaxial strip junction interblock connection.

Known coaxial-strip transitions containing a detachable housing, which is the outer conductor, inner conductor, dielectric sleeve (a guide to the calculation and design of microwave strip devices. / Ed. By V.I. Volman. M: Radio and communication, 1982, p. 210 - 214, Fig. 4.64 - 4.71). In these designs of coaxial-strip transitions, a threaded joint with a mating part is provided.

The disadvantages of these coaxial-strip transitions are the need to provide free access to the mated connectors for their connection with the counterpart, which leads to an increase in the distance between the coaxial-strip transitions located on the block body, and between the blocks themselves inside the microwave devices; insufficient strength of the connection details of the transition structure in relation to a significant radial force when connecting and disconnecting the mate, which can lead to the rotation of the inner conductor.

Known coaxial strip transition SRG-50-749 FV VR0.364.052 TU, which is a fork type. The counterpart for connecting to the SRG-50-749 PV coaxial-strip junction — the coaxial-strip junction representing a cut-in type socket in ВР0.364.052 ТУ, is not provided.

To connect to this coaxial-strip junction, the CP-50-772 ФВ ВР0.364.052 ТУ cut-in coaxial socket is used, which is soldered to the PK50-3.7-31 coaxial cable, it cannot be attached directly to the microwave unit body. The design of the central core of the CP-50-772 FV coaxial socket outlet includes a female spring that provides longitudinal clamping force of the mating connectors to ensure reliable electrical contact between the contact pairs. To ensure guaranteed contact on the screen and increase the degree of freedom between the joined connectors in alignment, a compression spring is installed on the outside of the socket housing. This contact pair (cut-in plug and socket) allows for the connection of microwave blocks located in places with a high density of installation, where it is impossible to use threaded connections.

The disadvantage of this connection is that the interblock connection is possible only through the adapter cable PK50-3.7-31, which leads to an increase in losses in the transmission line and an increase in size during the interblock connection.

Known coaxial strip junction MVIA.434531.001, which is a cut-in type instrument socket. Coaxial-stripe transition MVIA.434531.001 (figure 1) contains a housing 1 with a flange, which is the outer conductor, the central core (socket) 2, which is the inner conductor, the dielectric sleeve 3.

The central core (socket) 2 has a structure similar to the CP-50-772 FV coaxial socket, the dielectric sleeve 3 provides centering and rigid fixation of the central core, the housing flange 1 provides reliable fastening of the coaxial-strip transition to the microwave unit body.

The MVIA.434531.001 coaxial-strip junction is manufactured and used in the microwave blocks of the radar station at MZ RIP OJSC from 2001 to the present as a counterpart to the SRG-50-749 PV coaxial-strip junction. This coaxial-strip transition is an analogue of the claimed device.

Figure 2 shows the contact pair: coaxial-strip transition - plug-in type SRG-50-749 ФВ and coaxial-strip transition MVIA.434531.001 - instrument socket type.

When articulating the MVIA.434531.001 coaxial-strip junction with the counterpart (SRG-50-749 PV coaxial-strip junction), the central core (socket) 2 contacts the central core (pin) 8 of the counterpart and the cases (outer conductors). The connection is optimal if the pin enters the socket without a gap, and the gap between the connector bodies in the joint plane is minimal.

The central core (socket) of the 2 MVIA.434531.001 coaxial-strip junction provides additional clamping force of the internal conductors, and the thickened wall of the MVIA.434531.001 coaxial-strip junction 1 provides the optimal contact of the outer conductors.

The disadvantages of the MVIA.434531.001 coaxial strip junction are the high requirements for alignment (± 1 deg) and centering (± 0.05 mm) when connected to the counterpart - SRG-50-749 PV coaxial strip junction; the absence of a structural element in the connector that provides reliable contact of the outer conductors with a gap between them in the joint plane; lack of guaranteed electrical contact when the connectors are understated.

The present invention solves the problem of ensuring guaranteed electrical contact when installing microwave units in hard-to-reach places, including when they are undersized, in mass production, reducing design requirements for dimensional accuracy at the junction with the mating part and alignment requirements between the contact pair ( with a plug and socket).

To achieve a technical result in the MVIA.434531.001 coaxial-strip junction, which is a cut-in type instrument socket containing a housing with a flange that is an external conductor, a central core (socket), which is an internal conductor, a dielectric sleeve, an additional contact concentric spring with an electric spring is introduced contact with the housing 1 with the flange and forming together with the housing a single external conductor, while the housing has an increased inner diameter of the relative outer the diameter of the body of the mating part. To prevent the displacement of the central core (socket) of the coaxial-strip transition, an additional dielectric sleeve is introduced when connecting and disconnecting the mating part.

A distinctive feature of the proposed coaxial-strip transition from the above known, closest to it, is:

- the presence of a contact concentric spring having electrical contact with the housing and forming together with the housing a single external conductor;

- increased inner diameter of the housing relative to the outer diameter of the housing of the reciprocal part;

- the presence of an additional dielectric sleeve that holds the central core when connecting and disconnecting the mating part, preventing its displacement.

The proposed coaxial-strip transition is illustrated by the drawings, presented in figure 3, 4.

Figure 3 is an assembly drawing of a coaxial strip junction.

Figure 4 is a front view of the coaxial-stripe transition.

The coaxial-strip transition (Figs. 3 and 4) is a cut-in type instrument outlet, contains a housing 1 with a flange, which is an external conductor, a central core (socket) 2, which is an internal conductor, a contact concentric spring 5, dielectric bushings 3, 4. Contact concentric spring 5 is in electrical contact with the housing 1 with a flange and forms a single external conductor with the housing.

The housing 1 with a flange has an increased inner diameter relative to the outer diameter of the housing of the counterpart of the coaxial strip transition, which reduces design requirements for the accuracy of the mating dimensions at the junction with the counterpart and the requirements for alignment between the contact pair. At the same time, guaranteed contact on the inner surface of the outer conductor in case of under-compilation and in case of misalignment of the mating connectors is provided by the clamping force of the contact concentric spring 5.

The central core (socket) 2 of the coaxial part ends with a socket contact. The contact socket has four lamellas (Fig. 4), which provides a low articulation force with the counter pin and reduced requirements for alignment of the central cores of the contact pair, as well as for their mismatch in geometric dimensions.

The dielectric sleeve 3 provides an accurate coaxial arrangement of the central core (socket) 2, and the dielectric sleeve 4 holds the central core (socket) 2, preventing its displacement, thereby ensuring sufficient strength of the proposed coaxial-strip transition when connecting and disconnecting the mating part.

The assembled coaxial-strip transition (Fig. 5) through the flange of the housing 1 of the coaxial-strip transition is rigidly attached to the housing of the microwave unit 6, and the end of the central core (socket) 2 from the strip side of the coaxial-strip transition is designed to be installed in the hole of the strip line 7 and joining the strip by soldering. The end of the central core (nest) 2 on the coaxial side of the coaxial strip junction (socket) is intended for connection to the central core (pin) of the response part of the junction (to the coaxial strip junction SRG-50-749 PV).

The work of the coaxial-stripe transition is as follows. When articulating the coaxial-strip junction with the counterpart (coaxial-strip junction SRG-50-749 PV), the central core (socket) 2 contacts the central core (pin) 8 of the counterpart. At the same time, the contact concentric spring 5 covers the body of the counterpart, which is the outer conductor, providing a longitudinal clamping force of the mating connectors along the entire length of the joint of the coaxial-strip transitions. Electrical contact when connecting the outer conductors is provided at any point in the spring. This allows you to ensure reliable electrical contact of the mating connectors as in violation of the alignment of the articulated microwave blocks, and in the absence of coaxial-strip transitions of contact pairs by up to 1.5 mm.

In case of misalignment or docking at an angle of articulated transitions, the spring holds the counterpart, providing the necessary degree of freedom for moving the outlet in the transverse plane within ± 0.5 mm and in case of violation of perpendicularity within ± 5 degrees in any direction.

The technical result is confirmed by the manufacture of an experimental batch of coaxial strip junctions and microwave blocks - N-channel power dividers / combiners with the claimed coaxial strip junctions. Verification tests of microwave units have been carried out; microwave units as part of a radar station are currently being tested.

Claims (1)

Coaxial-strip transition, which is a cut-in type instrument outlet, comprising a housing with a flange, which is an external conductor, a central core (socket), which is an internal conductor, a dielectric sleeve, characterized in that a contact concentric spring is inserted into it, having an electrical contact with housing with a flange and forming together with the housing a single outer conductor, while the housing has an increased inner diameter relative to the outer diameter of the housing of the reciprocal STI that provides guaranteed electrical contact with the releasable connection misalignment and nedosochlenenii abutting plugs, to prevent displacement of the central core (nest) coaxial stripline transition for connection and disconnection mating dielectric sleeve further introduced.

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