A ceramic-filled miniaturized coaxial waveguide converter

Abstract

The present invention discloses a ceramic-filled miniaturized coaxial waveguide converter. A ceramic-filled miniaturized coaxial waveguide converter comprises an inner conductor, a matching block, a first outer conductor, a cover plate, a second outer conductor, an insulator, a first ceramic insulator, and a second ceramic insulator; the inner conductor is arranged in the insulator, the insulator is arranged in the first outer conductor and the second outer conductor, the first ceramic insulator and the second ceramic insulator are arranged in the first outer conductor, the matching block is arranged in the first ceramic insulator and the second ceramic insulator, the first outer conductor is connected to the matching block, the cover plate is connected to the first outer conductor, and the second outer conductor is connected to the first outer conductor. The present invention changes the waveguide matching block from the traditional multiple step form to a single inclined surface form, thereby simplifying the inner cavity shape of the ceramic insulator matched therewith, and the ceramic insulator is easy to process. The present invention solves the problem that the waveguide cavity used in the low frequency band is large in size and difficult to miniaturize.

Description

Technical Field

[0001] The invention relates to the field of converters, and in particular to a ceramic-filled miniaturized coaxial waveguide converter. Background Art

[0002] Since coaxial waveguide converters can realize mutual conversion between waveguide and coaxial products and interconnection between complete equipment, they are widely used in occasions that require microwave signal transmission. With the development of miniaturization and modularization of complete equipment, the market demand for miniaturized coaxial waveguide converters is also increasing.

[0003] According to the transmission principle of waveguide: signals with frequencies higher than or equal to the waveguide cutoff frequency can be transmitted in the waveguide, and signals with frequencies lower than the waveguide cutoff frequency will attenuate in the waveguide. The size of the cutoff frequency is determined by the size of the waveguide cross section. The larger the waveguide cross section, the lower the cutoff frequency. Therefore, in situations where the frequency is low, how to miniaturize the waveguide has become an urgent problem to be solved. In this context, there is an urgent need for a miniaturized waveguide that can meet the requirements of low-frequency use to meet the market demand for module connections. Summary of the invention

[0004] The object of the present invention is to provide a ceramic-filled miniaturized coaxial waveguide converter to solve the above technical problems.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A ceramic-filled miniaturized coaxial waveguide converter comprises an inner conductor, a matching block, a first outer conductor, a cover plate, a second outer conductor, an insulator, a first ceramic insulator and a second ceramic insulator; the inner conductor is arranged in the insulator, the insulator is arranged in the first outer conductor and the second outer conductor, the first ceramic insulator and the second ceramic insulator are arranged in the first outer conductor, the matching block is arranged in the first ceramic insulator and the second ceramic insulator, the first outer conductor is connected to the matching block, the cover plate is connected to the first outer conductor, and the second outer conductor is connected to the first outer conductor.

[0007] As a further solution of the present invention, the first outer conductor is provided with a groove for the matching block to be inserted, a countersunk hole for the first screw, a threaded hole for connecting the cover plate, a cavity for mounting the insulator, the first ceramic insulator and the second ceramic insulator, a threaded hole for connecting the second outer conductor, and a cavity for inserting the user-end ceramic block.

[0008] As a further solution of the present invention, the matching block is provided with a boss for clamping the first outer conductor, a threaded hole for installing the first screw, a cylinder for installing the first ceramic insulator, and a needle for installing the inner conductor.

[0009] As a further solution of the present invention, the shape of the matching block when installed in the first ceramic insulator is a cylinder, the cross-sectional shape along the radial direction when installed in the second ceramic insulator is a trapezoid, and the upper matching surface is an inclined surface.

[0010] As a further solution of the present invention, the matching block is installed in the first ceramic insulator and is also installed in the cavity of the first outer conductor. The boss of the matching block is inserted into the groove of the first outer conductor, and the first outer conductor is connected to the matching block by a first screw.

[0011] As a further solution of the present invention, the matching block, the first ceramic insulator, the second ceramic insulator, the second outer conductor, the inner conductor, and the insulator are installed in the first outer conductor, and the cover plate is connected to the first outer conductor by a third screw to form a closed waveguide cavity.

[0012] As a further solution of the present invention, the second outer conductor is connected to the first outer conductor by a second screw, and the inner conductor is connected to the matching block by pinhole plugging, thereby realizing the conversion between waveguide and coaxial.

[0013] Compared with the prior art, the present invention has the following advantages: it fills the traditional hollow waveguide with ceramic dielectric, utilizes the principle that the cutoff frequency of the waveguide is inversely proportional to the square root value of the dielectric constant ε of the dielectric, and uses a ceramic dielectric with a larger dielectric constant as the filling medium to reduce the cutoff frequency of the waveguide, thereby achieving the purpose of using a smaller waveguide cross-sectional area to transmit low-frequency microwave signals. The present invention changes the waveguide matching block from the traditional multiple step form to a single inclined plane form, thereby making the inner cavity shape of the ceramic insulator matched therewith simpler and the ceramic insulator easier to process. The present invention solves the problem that the waveguide cavity used in the low-frequency band is large in size and difficult to miniaturize. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention.

[0015] Figure 2 It is an external schematic diagram of the present invention.

[0016] Figure 3 Schematic diagram of the waveguide cavity of the present invention.

[0017] In the figure: the cavity at A is the ceramic block inserted into the user end, B is the coaxial end interface, and C is the waveguide cavity; 1-inner conductor; 2-matching block; 3-first outer conductor; 4-cover plate; 5-second outer conductor; 6-insulator; 7-first ceramic insulator; 8-second ceramic insulator; 9-first screw; 10-second screw; 11-third screw. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] As shown in the figure, a ceramic-filled miniaturized coaxial waveguide converter includes an inner conductor 1, a matching block 2, a first outer conductor 3, a cover plate 4, a second outer conductor 5, an insulator 6, a first ceramic insulator 7, and a second ceramic insulator 8; the inner conductor 1 is arranged in the insulator 6, the insulator 6 is arranged in the first outer conductor 3 and the second outer conductor 5, the first ceramic insulator 7 and the second ceramic insulator 8 are arranged in the first outer conductor 3, the matching block 2 is arranged in the first ceramic insulator 7 and the second ceramic insulator 8, the first outer conductor 3 is connected to the matching block 2, the cover plate 4 is connected to the first outer conductor 3, and the second outer conductor 5 is connected to the first outer conductor 3.

[0020] The first outer conductor 3 is provided with a groove for the matching block 2 to be inserted, a countersunk hole for the first screw 9, a threaded hole for connecting the cover plate 4, a cavity for installing the insulator 6, the first ceramic insulator 7, and the second ceramic insulator 8, a threaded hole for connecting the second outer conductor 5, and a cavity for inserting the user-end ceramic block. The matching block 2 is provided with a boss for inserting the first outer conductor 3, a threaded hole for installing the first screw 9, a cylinder for installing the first ceramic insulator 7, and a needle for installing the inner conductor 1. The shape of the matching block 2 for installing the first ceramic insulator 7 is a cylinder, and the cross-sectional shape along the radial direction for installing the second ceramic insulator 8 is a trapezoid, and the upper matching surface is an inclined surface. Compared with the traditional matching block in the form of multiple steps, the matching block 2 of the present invention has a smoother transition in electrical performance. In addition, due to its simple shape, the ceramic medium matched with it is easier to process.

[0021] The matching block 2 is installed in the first ceramic insulator 7 and is also installed in the cavity of the first outer conductor 3 . The boss of the matching block 2 is inserted into the groove of the first outer conductor 3 . The first outer conductor 3 is connected to the matching block 2 by a first screw 9 .

[0022] The matching block 2, the first ceramic insulator 7, the second ceramic insulator 8, the second outer conductor 5, the inner conductor 1, and the insulator 6 are installed in the first outer conductor 3, and the cover plate 4 is connected to the first outer conductor 3 by the third screw 11 to form a closed waveguide cavity. This method of assembling in an open cavity is not only convenient for operation, but also conducive to observing whether the assembly is in place and facilitating timely adjustment.

[0023] The second outer conductor 5 is connected to the first outer conductor 3 by a second screw 10, and the inner conductor 1 is connected to the matching block 2 by pinhole plugging, thereby realizing the conversion between waveguide and coaxial. This connection method is convenient for assembly and disassembly, and the interface form that is plugged in can be replaced according to the different interface forms of the user's coaxial end.

[0024] The installation preparation method of the present invention is as follows: first install the first ceramic insulator 7 into the matching block 2, and then install them together into the first outer conductor 3, the boss of the matching block 2 is inserted into the groove of the first outer conductor 3, and then the inner conductor 1, the insulator 6, and the second outer conductor 5 of the coaxial connector are installed into the first outer conductor 3, and the needle of the matching block 2 is inserted into the hole of the inner conductor 1. Then use the first screw 9 to connect the first outer conductor 3 to the matching block 2; use the second screw 10 to connect the second outer conductor 5 to the first outer conductor 3; and use the third screw 11 to connect the first outer conductor 3 to the cover plate 4. The second ceramic insulator 8 is installed on the matching block 2 through the waveguide cavity formed by the first outer conductor 3 and the cover plate 4. When the user uses it, the coaxial end interface is plugged into the connector interface it adapts to, and the waveguide cavity end is loaded with a ceramic rod embedded with the user's own ceramic block and fixed to the antenna product.

[0025] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. A ceramic-filled miniaturized coaxial waveguide converter, characterized in that: The invention comprises an inner conductor (1), a matching block (2), a first outer conductor (3), a cover plate (4), a second outer conductor (5), an insulator (6), a first ceramic insulator (7), and a second ceramic insulator (8); the inner conductor (1) is arranged in the insulator (6), the insulator (6) is arranged in the first outer conductor (3) and the second outer conductor (5), the first ceramic insulator (7) and the second ceramic insulator (8) are arranged in the first outer conductor (3), the matching block (2) is arranged in the first ceramic insulator (7) and the second ceramic insulator (8), and the first outer conductor (3) and the matching block are connected to each other. (2) is connected, the cover plate (4) is connected to the first outer conductor (3), the second outer conductor (5) is connected to the first outer conductor (3), the first outer conductor (3) is provided with a groove for the matching block (2) to be inserted, a countersunk hole for the first screw (9), a threaded hole for connecting the cover plate (4), a cavity for installing the insulator (6), the first ceramic insulator (7), and the second ceramic insulator (8), a threaded hole for connecting the second outer conductor (5), and a cavity for inserting the user-end ceramic block, the matching block (2) is provided with a groove for inserting the first outer conductor (3), a countersunk hole for the first screw (9), a threaded hole for connecting the cover plate (4), and a cavity for inserting the user-end ceramic block. The boss is provided with a threaded hole for inserting a first screw (9), a cylinder for inserting a first ceramic insulator (7), and a needle for inserting an inner conductor (1). The matching block (2) is in the shape of a cylinder when inserted into the first ceramic insulator (7), and has a trapezoidal cross-sectional shape in the radial direction when inserted into the second ceramic insulator (8). The upper mating surface is an inclined surface. The matching block (2) is installed in the first ceramic insulator (7) and is also installed in the cavity of the first outer conductor (3). The boss of the matching block (2) is inserted into the groove of the first outer conductor (3) and is inserted into the second ceramic insulator (8) through the first screw. (9) connecting the first outer conductor (3) to the matching block (2); the matching block (2), the first ceramic insulator (7), the second ceramic insulator (8), the second outer conductor (5), the inner conductor (1), and the insulator (6) are installed in the first outer conductor (3); and the cover plate (4) is connected to the first outer conductor (3) by a third screw (11) to form a closed waveguide cavity; the second outer conductor (5) is connected to the first outer conductor (3) by a second screw (10); and the inner conductor (1) is connected to the matching block (2) by pinhole plugging, thereby realizing the conversion between waveguide and coaxial; The coaxial waveguide converter is installed as follows: first, the first ceramic insulator (7) is installed in the matching block (2), and then installed together in the first outer conductor (3), the boss of the matching block (2) is inserted into the groove of the first outer conductor (3), and then the inner conductor (1), the insulator (6) and the second outer conductor (5) of the coaxial connector are installed in the first outer conductor (3), the needle of the matching block (2) is inserted into the hole of the inner conductor (1), and then the first outer conductor 3 is connected to the matching block (2) by a first screw (9); the second outer conductor (5) is connected to the first outer conductor (3) by a second screw (10); and the first outer conductor (3) is connected to the cover plate (4) by a third screw (11), and the second ceramic insulator (8) is installed on the matching block (2) through the waveguide cavity formed by the first outer conductor (3) and the cover plate (4).

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