SU1626271A1 - Microwave phase shifter - Google Patents

Abstract

The invention is responsive to radio engineering and can be used to adjust the phase of the microwave signals. The purpose of the invention is to increase the reliability of the design, as well as to improve the consistency. The phase shifter contains a grounded base 1 in the form of a segment of a straight round hollow closed cylinder, a dielectric liner (DV) 2 fixed to the inner surface of the grounded base 1, and an internal conductor (VP), which may be U-shaped or straight. DW 2 has a variable thickness, its outer surface coincides with the inner surface of the g-1 base, and the inner surface is formed of a cylindrical circular surface. The axes of the grounded base 1. DW 2 and the axis passing through the ends of VP 3, which are connected to terminals 4, are parallel. The terminals 4 pass through holes in the end walls 5 of the grounded base 1, which can be connected to it either by using spring contacts or via chokes. The grounded base 1 is rotatably mounted about axis 6, which coincides with or parallel to the axis passing through terminals 4. When the grounded base is rotated due to a change in the thickness of DW 2, the effective dielectric constant of the gap between the grounded base 1 and VP 3 changes, which ensures a change in the phase shift. The connection of the fixed end walls 5 with the movable grounded base 1 is made around a larger diameter circle, which increases the reliability of the operation of the phase shifter. Elimination of irregularities in the form of bends of VP 3 improves matching. 1 hp ff, 3 ill. (L S Schig.1

Description

The invention relates to radio engineering and can be used to control the phase of microwave signals. The purpose of the invention is to increase the reliability of the design, as well as to improve the consistency.

FIG. 1 shows a microwave phase shifter with an internal U-shaped conductor, general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 - microwave phase shifter with internal rectilinear conductor. The microwave phase shifter contains a grounded base 1 made in the form of a straight round hollow closed cylinder, a dielectric insert 2 fixed on the inner surface of the grounded base 1 and the inner conductor 3, which may be U-shaped or straight.

The dielectric insert 2 has a variable thickness, with its outer surface co-located with the inner surface of the grounded base 1, and the inner surface is formed by a cylindrical circular surface. The axes of the grounded base 1, the dielectric liner, G2 and the passage through the ends of the inner conductor 3, to which the leads 4 are rigidly attached, are parallel. The terminals 4 pass through holes in the end walls 5 of the grounded base 1, which can be connected to it either by using spring contacts or via chokes (not shown).

The grounded base 1 is mounted with the possibility of rotation around axis 6, which coincides with the axis passing through terminals 4, or parallel to it. The rotation mechanism can be made in the form of gears 7.

Microwave phase shifter works as follows.

When the grounded base 1 is rotated together with the dielectric pad 2 fixed inside it due to a change in the thickness of the dielectric pad 2, the effective dielectric constant of the gap between the inner conductor 3 and the grounded base 1 and, therefore, the phase constant of the electromagnetic wave, ensures that the phase raid. The resultant change in the impedance of the transmission line is compensated by a simultaneous change in

the distance between the inner conductor 3 and the grounded base 1.

The end walls 5, which are stationary, are connected to the grounded base 1 around a larger diameter than the diameter of the inner conductor 3, the surface of which makes electrical contact in a known phase shifter, which provides a large interaction surface between the conductive parts of the phase shifter, increasing reliability of their connection and, consequently, the reliability of the microwave

phase shifter as a whole.

Use as a moving part of the microwave phase shifter grounded base 1 makes it possible to simplify access to the moving part

and thus improve the usability.

The implementation of the inner conductor 3 is linear, which allows for improved coordination in a wide frequency band due to

elimination of inhomogeneities in the form of bends of the inner conductor 3.

Claims (2)

1. A microwave phase shifter containing a grounded base, made in the form of a cutting of a straight round hollow closed cylinder, a dielectric insert fixed to the inner surface of the grounded base and having a variable thickness, the outer surface coincides with the inner surface of the grounded base, and the inner surface is surrounded by a cylindrical circular surface, and the inner conductor installed inside the grounded base, to the ends of which are rigidly attached leads passing through the holes in the end the walls of the grounded base, with the axis of the grounded base, the dielectric liner and the axis passing through the ends of the inner the superconductor, para- are parallel, characterized in that, with In order to increase the reliability of the construction, the grounded base is mounted for rotation around an axis parallel to the axis of the inner conductor. 2. Phaser according to claim 1, so that it is so that, in order to improve the matching, the inner conductor is made straight. . .U 2 EL-UUA & SfrXx & x   h v. lg l ... Fig 3 XXX ×