CN209948015U - Waveguide coaxial converter and waveguide port radio frequency cable assembly - Google Patents

Abstract

The utility model discloses a waveguide coaxial converter and a waveguide port radio frequency cable assembly, wherein the waveguide coaxial converter comprises a waveguide port seat, a connecting back seat, an insulating block, a connecting piece, a first bush and a second bush; the waveguide port radio frequency cable assembly comprises a radio frequency coaxial cable; one end of the radio frequency coaxial cable is provided with a waveguide connector, and the other end of the radio frequency coaxial cable is provided with a radio frequency coaxial connector, or: both ends are provided with waveguide connectors, or: one end is provided with a waveguide connector, and the other end is provided with a terminating type waveguide coaxial converter or an orthogonal type waveguide coaxial converter; the waveguide port connector is formed by sequentially connecting a waveguide coaxial converter, a straight waveguide tube and a bent waveguide tube. The utility model discloses an interconnection between the waveguide port of different positions and different opening orientations or different specification waveguide ports and between waveguide and the coaxial port among the microwave radio frequency system provides a scheme reliable and practical.

Description

Waveguide coaxial converter and waveguide port radio frequency cable assembly

Technical Field

The utility model relates to the field of communication technology, concretely relates to coaxial converter of waveguide and waveguide port radio frequency cable subassembly.

Background

The waveguide coaxial cable component is widely applied to a microwave radio frequency communication system and is an important passive device in radar antennas, missile guidance and microwave testing. The waveguide device has the characteristics of high working frequency, large power capacity, small transmission loss and the like, so the waveguide device is particularly suitable for occasions with high requirements on power transmission in a high-frequency band. However, in practical applications, there are many different specifications of waveguides and waveguide port orientations, which cause certain difficulties in interconnecting the ports, and thus, waveguide coaxial cable assemblies have come into force.

However, in the conventional waveguide coaxial assembly, only the required waveguide coaxial converters are simply connected to two ends of a coaxial cable, or one end of the coaxial cable is connected to the waveguide coaxial converters, and the other end of the coaxial cable is connected to a radio frequency coaxial connector, and when two ports to be connected are far apart, the length of the coaxial cable is inevitably increased, which inevitably causes large power loss. Furthermore, if the two ports to be connected are oriented differently, the coaxial lines also need to be bent, which also deteriorates the overall performance of the assembly.

Disclosure of Invention

To the problem that exists among the above-mentioned prior art, the utility model aims at providing a coaxial converter of waveguide and waveguide port radio frequency cable subassembly provides a tangible reliable scheme for the interconnection between the waveguide port of different positions and different opening orientations or different specification waveguide ports and between waveguide and the coaxial port among the microwave radio frequency system.

In order to realize the task, the utility model discloses a following technical scheme:

a waveguide coaxial converter comprises a connecting piece, a waveguide port seat and a terminal connection rear seat fixed at the front end of the waveguide port seat;

a stepped hole which is gradually reduced is formed from the rear end to the front end of the waveguide mouth seat along the axial direction, and a convex contact element is arranged at the small end of the stepped hole; the first connecting hole to the fourth connecting hole with diameters sequentially increased are formed from the rear end of the end connection rear seat to the front end of the end connection rear seat along the axial direction;

the two ends of the connecting piece are respectively provided with jacks towards the inside of the connecting piece, the connecting piece is sleeved with an insulating block, and the insulating block is assembled in the second connecting hole; the rear end of the connecting piece extends into the first connecting hole, and the contact piece is inserted into the jack at the rear end of the connecting piece;

and a first bush is assembled in the third connecting hole of the termination rear seat, when the radio frequency coaxial cable is assembled, a second bush is fixed outside one end of the radio frequency coaxial cable, then the second bush is assembled in the fourth connecting hole to enable the second bush to be in contact with the first bush, the inner conductor of the radio frequency coaxial cable is inserted into the jack at the front end of the connecting piece, and then the second bush is fixed through a fixing nut.

Furthermore, the outer wall of the fixing nut and the inner wall of the fourth connecting hole are provided with external threads and internal threads which are matched with each other.

Furthermore, the two ends of the connecting piece are elastic ends, an annular groove is formed in the outer wall of the middle of the connecting piece, and the insulating block is sleeved on the annular groove.

Furthermore, the waveguide port seat and the termination rear seat are correspondingly provided with fixing holes, and the waveguide port seat and the termination rear seat are fixedly connected through connecting screws.

A waveguide port radio frequency cable assembly includes a radio frequency coaxial cable; one end of the radio frequency coaxial cable is provided with a waveguide connector, and the other end of the radio frequency coaxial cable is provided with a radio frequency coaxial connector, or:

both ends are provided with waveguide connectors, or:

one end is provided with a waveguide connector, and the other end is provided with a terminating type waveguide coaxial converter or an orthogonal type waveguide coaxial converter;

the waveguide port connector is formed by sequentially connecting a waveguide coaxial converter, a straight waveguide tube and a bent waveguide tube.

Further, the bending waveguide may be an E-plane bending waveguide or an H-plane bending waveguide.

The utility model has the following technical characteristics:

1. the utility model provides a connection scheme between waveguide ports or between a waveguide port and a coaxial port, which realizes different positions, different specifications and different opening orientations in a microwave radio frequency system; the port specification of the waveguide port connector can be standard or nonstandard, and the port specification is designed according to the system requirement. Due to the characteristic of formability of the coaxial cable, great convenience is provided for interconnection between two ports at different positions.

2. The utility model discloses make full use of waveguide device power capacity is big, the characteristics that transmission line of the same type easily matches each other, and the crooked of minimize unnecessary coaxial line length and application waveguide pipe self replaces the crooked of coaxial line in whole waveguide coaxial assembly to convenient completion is between the different ports and the interconnection between the different port orientation ports under the prerequisite of guaranteeing required power.

3. The utility model discloses design waveguide port connector and coaxial cable as a whole also can avoid separately independent design to connect the impedance that probably causes when connecing again and mismatch the scheduling problem to the assurance signal transmission's of ability utmost point degree reliability.

Drawings

Fig. 1 is a top view, front view of a waveguide port rf cable assembly of the present invention;

fig. 2 is an exploded view of the waveguide coaxial converter of the present invention;

FIG. 3 is an axial cross-sectional schematic view of a waveguide coaxial transducer;

fig. 4 is a schematic diagram of a radio frequency coaxial cable with a radio frequency coaxial connector at one end and a waveguide connector at the other end, wherein the waveguide of the waveguide connector is an H-plane waveguide;

FIG. 5 is a schematic diagram of a RF coaxial cable with waveguide connectors at both ends, the waveguides in both connectors being H-plane waveguides;

fig. 6 is a schematic diagram of the rf coaxial cable with waveguide connectors at both ends, in which one of the waveguide connectors is an H-plane waveguide and the other is an E-plane waveguide;

FIG. 7 is a schematic diagram of a RF coaxial cable with waveguide connectors at both ends, the waveguides in both connectors being E-plane waveguides;

fig. 8 is a schematic diagram of a terminating waveguide coaxial converter at one end of the radio frequency coaxial cable and a waveguide connector at the other end, wherein the waveguide of the waveguide connector is an H-plane waveguide;

fig. 9 is a schematic diagram of an orthogonal waveguide coaxial converter at one end of the radio frequency coaxial cable and a waveguide connector at the other end, wherein the waveguide of the waveguide connector is an H-plane waveguide;

in fig. 4 to 9, (a) is a top view, and (b) is a front view.

The reference numbers in the figures illustrate: the coaxial cable connector comprises an A waveguide connector, an A1 waveguide coaxial converter, an A2 straight waveguide tube, an A3 bent waveguide tube, a B radio frequency coaxial cable, a B1 inner conductor, a C radio frequency coaxial connector, a D-end type waveguide coaxial converter, an E orthogonal type waveguide coaxial converter, a1 waveguide port seat, 11 stepped holes, 12 contact pieces, a 2-end rear seat, a 21 first connecting hole, a 22 second connecting hole, a 23 third connecting hole, a 24 fourth connecting hole, A3 insulating block, a 4 connecting piece, a 41 annular groove, a 42 jack, a 5 first bushing, a 6 second bushing, a 7 fixing nut, 71 external threads and 8 connecting screws.

Detailed Description

The invention firstly provides a waveguide coaxial converter A1, as shown in fig. 2 and fig. 3, comprising a connecting piece 4, a waveguide port seat 1 and a terminal rear seat 2 fixed at the front end of the waveguide port seat 1;

a stepped hole 11 which is gradually reduced is axially formed from the rear end to the front end of the waveguide mouth seat 1, and a convex contact element 12 is arranged at the small end of the stepped hole 11; the rear end of the end connection rear seat 2 is axially provided with a first connecting hole 21 to a fourth connecting hole 24 which are sequentially enlarged from the rear end to the front end;

the two ends of the connecting piece 4 are respectively provided with an inserting hole 42 towards the inside of the connecting piece 4, the insulating block 3 is assembled in the second connecting hole 22, the insulating block 3 is sleeved on the connecting piece 4, the rear end of the connecting piece 4 extends into the first connecting hole 21, and the contact piece 12 is inserted into the inserting hole 42 at the rear end of the connecting piece 4;

the first bush 5 is fitted into the third coupling hole 23 of the terminal rear block 2, and when the rf coaxial cable B is fitted, a second bush 6 is externally fixed to one end of the rf coaxial cable B, and then the second bush 6 is fitted into the fourth coupling hole 24 so that the second bush 6 is in contact with the first bush 5 and the inner conductor B1 of the rf coaxial cable B is inserted into the insertion hole 42 of the front end of the connector 4, and then the second bush 6 is fixed by the fixing nut 7.

As shown in fig. 2, a stepped hole 11 for completing impedance transformation is axially processed in the waveguide mouth seat 1, and in the example shown in fig. 2, the stepped hole 11 is processed on the same side; the end of the stepped hole 11 with the smallest diameter is forward cylindrically convex to form a contact 12, and the contact 12 is matched with the connecting piece 4 to complete the connection with the radio frequency coaxial cable B.

The waveguide port seat 1 and the end connection rear seat 2 are correspondingly provided with fixing holes, and the waveguide port seat 1 and the end connection rear seat are fixedly connected through a connecting screw 8. The inside of the termination rear seat 2 is sequentially provided with a coaxial first connecting hole 21, a coaxial second connecting hole 22, a coaxial third connecting hole 23 and a coaxial fourth connecting hole 24 from the rear end to the front end, and the diameters of the first connecting hole, the coaxial second connecting hole, the coaxial third connecting hole and the coaxial fourth connecting hole are sequentially increased.

The connecting piece 4 is of a cylindrical structure, two ends of the connecting piece are elastic ends, namely the two ends are made of elastic materials, and the front end and the rear end of the connecting piece are provided with inserting holes 42 towards the inside of the connecting piece along the axial direction. Alternatively, the wall of the receptacle 42 may be four-lobed and tapered. When the inner conductor B1 of the radio frequency coaxial cable B is inserted into the insertion hole 42 at the front end of the connector 4, the tight engagement of the inner conductor B1 and the connector 4 is ensured due to the elasticity of the insertion hole 42. A ring of annular groove 41 is processed outside the middle position of the connecting piece 4, the insulating block 3 is a circular block body, the middle part of the insulating block is provided with a hole, and the insulating block is sleeved on the annular groove 41 of the connecting piece 4.

The first bushing 5 is a hollow circular sleeve and is arranged in the third connecting hole 23, and has two functions, namely, the part for arranging the radio-frequency coaxial cable B in the end connection rear seat 2 plays a role in axial limiting, and the first bushing is tightly contacted with the second bushing 6 to form a coaxial outer conductor. The second bush 6 is also a hollow circular bush, and the second bush 6 is sleeved and fixed at the end part of the radio frequency coaxial cable B in a welding mode.

The fixing nut 7 is internally provided with a limiting step, after the fastening nut is sleeved on the radio frequency coaxial cable B, the limiting step plays a limiting role on the second bush 6, the outer wall of the fastening nut is provided with an external thread 71 which is matched with an internal thread on the inner wall of the fourth connecting hole 24 of the end connection back seat 2, the second bush 6 is fixed in a rotary fixing mode, and meanwhile the connection of the radio frequency coaxial cable B and the end connection back seat 2 is also fixed.

Among the above components, the waveguide mouth seat 1, the termination rear seat 2, the first bushing 5 and the second bushing 6 are preferably made of brass, the insulator is made of a chlorine-containing polymer, and the connecting piece 4 is made of beryllium bronze.

The waveguide coaxial converter a1 is specifically assembled as follows:

the insulation block 3 is sleeved on the connecting piece 4, then the insulation block 3 is placed in the second connecting hole 22 of the termination rear seat 2, the contact piece 12 is inserted into the inserting hole 42 at the rear end of the connecting piece 4, and then the waveguide mouth seat 1 and the termination rear seat 2 are fixedly connected through the connecting screw 8.

The first bush 5 is put into the third connecting hole 23, the inner conductor B1 at one end of the radio frequency coaxial cable B is exposed, then the second bush 6 is welded and fixed at the end part of the radio frequency coaxial cable B, the inner conductor B1 of the radio frequency coaxial cable B is inserted into the jack 42 at the rear end of the connecting piece 4, and meanwhile, the second bush 6 enters the fourth connecting hole 24; finally, the fixing nut 7 sleeved on the radio frequency coaxial cable B is screwed with the terminating rear seat 2, so that the first bush 5 and the second bush 6 are tightly contacted, and the reliable contact of the fixing nut and the cable central conductor and the cavity contact piece 12 is ensured.

On the basis of the technical scheme, the utility model discloses a waveguide port radio frequency cable subassembly is further provided, including radio frequency coaxial cable B; one end of the radio frequency coaxial cable B is provided with a waveguide connector A, and the other end is provided with a radio frequency coaxial connector C, or:

both ends are provided with waveguide port connectors A, or:

one end is provided with a waveguide connector A, and the other end is provided with a terminating type waveguide coaxial converter D or an orthogonal type waveguide coaxial converter E; the terminating type waveguide coaxial converter D and the orthogonal type waveguide coaxial converter E are both products existing in the prior art, and are different from the waveguide coaxial converter a1 structure provided by the scheme.

The waveguide connector A is formed by sequentially connecting a waveguide coaxial converter A1, a straight waveguide A2 and a bent waveguide A3.

If the two ends of the radio frequency coaxial cable B are simultaneously connected with the waveguide connector a, the connected waveguide connector a may have different specifications, which are determined by the specification and the use frequency of the waveguide connector a in the connected system.

The radio frequency coaxial cable B is a flexible cable, or a semi-rigid cable, the length of the radio frequency cable can be selected and chosen within an acceptable power loss range according to the requirement, and the radio frequency coaxial cable B is bent and formed before assembly according to the requirement.

The outline of the cross section of the straight waveguide A2 and the outline of the inner cavity are both rectangular, and the cross section is the same along the direction vertical to the axis. In the application of connecting two waveguide port seats 1 with different dimensions, the rectangular section of the internal cavity of the straight waveguide a2 can be tapered along the axial direction, but the external section profile is still the same in the direction perpendicular to the axial direction, and the port section of the internal cavity at the end connected with the waveguide port seat 1 is the same as the cavity section of the waveguide port, and the port section of the temporal cavity at the end connected with the bent waveguide A3 is the same as the cavity section of the internal cavity of the bent waveguide port.

The cross section outline of the curved waveguide tube A3 and the outline of the internal cavity are both rectangular, and the cross sections along the direction perpendicular to the axis are equal. The size of the cross section of the inner cavity of the waveguide port seat 1 is the same as that of the inner cavity of the device to be connected. The bending waveguide A3 can be E-plane bending waveguide A3, and also can be H-plane bending waveguide A3. The selection of the E-plane curved waveguide and the H-plane curved waveguide is determined according to the actual cavity composition of the wave and the converter part.

Waveguide coaxial converter A1, as the name implies, converts TEM waves in a coaxial line to TE waves in a waveguide₁₀However, the equivalent impedance of the waveguide is generally much larger than the characteristic impedance of the coaxial line, and if the two are directly combined together, due to the mismatch of the impedances of the two, the reflection of the incident wave is caused at the joint of the two, and the worse the matching degree is, the more serious the reflection is, in this case, the component cannot be used, and in addition, the signal source is damaged due to the superposition of the incident wave and the reflected wave. It is necessary to reduce the reflection of the incident wave by fine design to match the impedances of the two to the maximum extent within the desired frequency range. The stepped hole 11 in the cavity portion inside the waveguide mouthpiece 1 is designed for impedance matching.

Specific forms of the rf coaxial cable B connectable to both ends are shown in fig. 4 to 9, which are: coaxial port and H-plane waveguide bend port (fig. 4), H-plane waveguide bend port and H-plane waveguide bend port (fig. 5), H-plane waveguide bend port and E-plane waveguide bend port (fig. 6), E-plane waveguide bend port and E-plane waveguide bend port (fig. 7), terminating waveguide coaxial converter D1 port and E-plane waveguide bend port (fig. 8), and orthogonal waveguide coaxial converter E1 port and H-plane waveguide bend port (fig. 9).

The remainder not described in detail in the specification is well known to those skilled in the art.

Claims (6)

1. A waveguide coaxial converter is characterized by comprising a connecting piece (4), a waveguide port seat (1) and a terminal connection rear seat (2) fixed at the front end of the waveguide port seat (1);

a stepped hole (11) which is gradually reduced is formed from the rear end to the front end of the waveguide mouth seat (1) along the axial direction, and a convex contact piece (12) is arranged at the small end of the stepped hole (11); the rear end of the end connection rear seat (2) is axially provided with a first connecting hole (21) to a fourth connecting hole (24) with diameters sequentially increased from the rear end to the front end;

two ends of the connecting piece (4) are respectively provided with an inserting hole (42) towards the inside of the connecting piece (4), the connecting piece (4) is sleeved with an insulating block (3), and the insulating block (3) is assembled in the second connecting hole (22); the rear end of the connecting piece (4) extends into the first connecting hole (21), and the contact piece (12) is inserted into the jack (42) at the rear end of the connecting piece (4);

the first bush (5) is assembled in the third connecting hole (23) of the termination rear seat (2), when the radio frequency coaxial cable (B) is assembled, a second bush (6) is fixed outside one end of the radio frequency coaxial cable (B), then the second bush (6) is assembled in the fourth connecting hole (24) to enable the second bush (6) to be in contact with the first bush (5), the inner conductor (B1) of the radio frequency coaxial cable (B) is inserted into the jack (42) at the front end of the connecting piece (4), and then the second bush (6) is fixed through the fixing nut (7).

2. The waveguide coaxial converter according to claim 1, characterized in that the outer wall of the fixing nut (7) and the inner wall of the fourth connection hole are provided with an external thread (71) and an internal thread which are matched with each other.

3. The waveguide coaxial converter according to claim 1, wherein both ends of the connecting member (4) are elastic ends, an annular groove (41) is formed in the outer wall of the middle part of the connecting member (4), and the insulating block (3) is sleeved on the annular groove (41).

4. The waveguide coaxial converter according to claim 1, wherein the waveguide port seat (1) and the termination rear seat (2) are correspondingly provided with fixing holes, and the fixing connection of the waveguide port seat and the termination rear seat is realized through a connecting screw (8).

5. A waveguide port radio frequency cable assembly, comprising a radio frequency coaxial cable (B); one end of the radio frequency coaxial cable (B) is provided with a waveguide connector (A), and the other end is provided with a radio frequency coaxial connector (C), or:

both ends are provided with waveguide port connectors (A), or:

one end is provided with a waveguide connector (A), and the other end is provided with a terminating type waveguide coaxial converter (D) or an orthogonal type waveguide coaxial converter (E);

the waveguide connector (A) is formed by connecting the waveguide coaxial converter (A1), the straight waveguide (A2) and the bent waveguide (A3) in sequence according to claim 1.

6. The waveguide port radio frequency cable assembly according to claim 5, wherein the bending waveguide tube (A3) is an E-plane bending waveguide tube or an H-plane bending waveguide tube.

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