RU2498465C1 - Articulated waveguide connection - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: articulated waveguide connection consists of two straight sections of rectangular waveguides mounted in movable and fixed cylindrical housings, between the walls of which a spherical bearing is placed such that its centre coincides with the point of intersection of the axes of the movable and fixed waveguides. Flat flanges with choke grooves are mounted at the ends of the waveguide sections. The inner surface of the cylindrical housing is coated with a layer of radar absorbent material.

EFFECT: wider bending angles and turning the movable waveguide connection with a short length of the movable waveguide connection, longer service life of the movable waveguide connection and reduced loss of microwave radiation.

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Description

Articulated waveguide connection (SHV) belongs to the field of radio engineering and can be used in microwave paths for connecting movable waveguides.

Mobile waveguide connections (PVA) are usually performed in the form of flexible waveguides [1], [2], [3]. Flexible waveguides are used, for example, to connect a space-stabilized antenna with equipment placed on board an aircraft that performs evolution along the roll, pitch and drift angle during a flight.

Known flexible rectangular waveguide, which is a contact-interconnected links located along the axis of the waveguide with the possibility of their mutual rotation and displacement. The links are formed by embedded sections of a rigid rectangular waveguide, the corresponding sides of which are connected by flexible U-shaped metal plates located between the inner surface of the large section of the waveguide and the outer surface of the smaller section of the waveguide. In this case, one edge of each plate has a contact connection with a segment of a large cross section, and the other edge with a segment of a smaller cross section [2].

The disadvantage of the described design is the low mobility of the links during bending and insufficient torsional strength.

Closest to the claimed invention (prototype) is a flexible waveguide of rectangular cross section, used to connect non-coaxial waveguides or waveguides that change the position according to the copyright certificate of the invention [4].

The flexible section of this waveguide consists of alternating metal flat plates equipped with a rectangular window, a pair of plates with a zig, mounted to each other by convex surfaces, interconnected by bushes, fixing elements in the form of metal rods and articulated intermediate frames on the end sections of the waveguide.

The disadvantage of this design is that the angle of possible bending of the waveguide depends on its length and on which plane (vector E or vector H) the waveguide is bent. However, increasing the length of the flexible waveguide leads to an increase in signal loss. Another disadvantage of the prototype is the limited number of bends and, therefore, the service life of the flexible section.

The technical result, which is achieved using the claimed invention, is to overcome the inherent disadvantages of the prototype, namely the reduction of microwave signal loss while increasing the functionality of the PVA.

A useful effect of the invention is to increase the bending and twisting angles of the movable waveguide connection with a short PVA length and increasing its service life.

To achieve the claimed technical result, it is proposed to perform a PVA in the form of two straight segments of a rectangular waveguide, inclined relative to the point of intersection of their axes or rotated along the axis of one of the waveguides.

The figure shows the design of the proposed SHV.

The SHV includes two straight segments of waveguides of rectangular cross-section 1, a spherical bearing 2 mounted between the walls of the movable and stationary cylindrical bodies 3, flat flanges at the ends of the segments of the waveguides 4 are equipped with throttle grooves.

The proposed design of the SHV works as follows. For definiteness, we assume that the right-hand segment of the waveguide 1 is stationary and mounted along the axis of the bearing. The movable segment of the waveguide 1 and the spherical bearing 2 are installed so that the center of the bearing is aligned with the point of intersection of the axes of the stationary and movable segments of the waveguide. When the movable segment is tilted, the distance between the ends of the movable and stationary segments changes slightly and, as a result, the microwave energy transfer coefficient remains practically unchanged. To increase the transmission coefficient, and therefore reduce losses, flat flanges 4 with throttle grooves are installed on the said ends. To ensure the electrical tightness of the SHV, the inner surfaces of the housings 3 are covered with a layer of radar absorbing material 5.

Literature

1. Flexible waveguide. Patent 2236070 C1, 07/31/2003, IPC H01P 3/14.

2. Flexible rectangular waveguide. Patent RU 2092938 C1, 12/21/1992, IPC H01P 3/14.

3. Flexible waveguide. Patent RU 21211735 C1, 02/11/1997, IPC H01P 3/14.

4. Flexible waveguide. AC SU 1809719 A1, 06/27/1990, IPC H01P 3/14

Claims (3)

1. Swivel waveguide connection (SHV), including a movable waveguide connection (PVA), characterized in that the PVA is made in the form of two straight segments of waveguides of rectangular cross section, mounted in a movable and stationary cylindrical bodies, between the walls of which a spherical bearing is mounted so that its center was aligned with the intersection of the axes of the movable and stationary waveguides. 2. ShVS according to claim 1, characterized in that at the ends of the waveguide sections there are flat flanges with throttle grooves. 3. ShVS according to claim 1, characterized in that a layer of radar absorbing material is applied to the inner surface of the cylindrical body.