CN115657042A - Dual-polarization line feed network of dual-polarization meteorological radar - Google Patents
Dual-polarization line feed network of dual-polarization meteorological radar Download PDFInfo
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- CN115657042A CN115657042A CN202211366385.4A CN202211366385A CN115657042A CN 115657042 A CN115657042 A CN 115657042A CN 202211366385 A CN202211366385 A CN 202211366385A CN 115657042 A CN115657042 A CN 115657042A
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Abstract
The invention discloses a dual-polarization line feed network of a dual-polarization meteorological radar, which adopts an air grid plate line structure form and is divided into two layers of cavities, wherein the two layers of cavities are respectively a cover plate, a medium support 1, an inner conductor 1, a medium support 2, a vertical partition wall 1, a transverse partition wall 1, a double-layer cavity, a vertical partition wall 2, a transverse partition wall 2, a medium support 3, an inner conductor 2, a medium support 4 and a bottom plate from top to bottom in a laminated relation, and an input/output port is provided with a connector, a horizontal polarization network and a vertical polarization network circuit which are isolated by isolation resistors. The invention mainly aims to meet the dual-polarization beam forming requirement of the S-band dual-polarization meteorological radar, simultaneously provides a horizontal polarization signal and a vertical polarization signal in the same dimension direction, adopts an integrated design technology, and realizes the purposes of low cost, light weight and high precision amplitude-phase distribution by the measures of profile drawing primary processing forming, cavity multiplexing, cross talk elimination by arranging transverse and vertical partition walls and the like.
Description
Technical Field
The invention relates to an antenna and microwave technology, in particular to a dual-polarization feed-line network of a dual-polarization meteorological radar.
Background
Early weather radars mostly adopt a single polarization system and a mechanical scanning system, and have introduced dual-polarization system weather radars as the requirements on weather forecast become higher and higher at the present stage, especially the requirements on the identification capability of short-term severe weather are improved. The system radar has obvious advantages in the aspects of strong precipitation estimation, phase state identification, non-meteorological echo identification and the like. The dual polarization radar can transmit and receive both horizontally polarized waves and vertically polarized waves. According to different emission modes of two polarized waves, the dual-polarization radar is divided into two technical systems of alternate emission and simultaneous same-frequency emission.
The traditional dual-polarization network implementation mode usually adopts an independent network composition mode, along with the increasing and increasing of the scale of an antenna array surface, the number of feed networks is increased, the number of interconnected cables is increased, and the reduction of the cost and the weight of a system is not facilitated. The invention mainly solves the problems of low integration level, complex interconnection, heavy weight and the like of the traditional feed network interconnection mode, develops a dual-polarization network to distribute and synthesize horizontal polarization signals and vertical polarization signals in the same dimension direction, and simultaneously meets the requirements of low cost and high precision amplitude phase distribution.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a dual-polarization feed-line network of a dual-polarization weather radar, which is mainly used for meeting the dual-polarization beam forming requirement of the S-band dual-polarization weather radar, simultaneously providing a horizontal polarization signal and a vertical polarization signal in the same dimension direction, adopting an integrated design technology, and realizing low-cost, light-weight and high-precision amplitude-phase distribution targets by means of profile drawing primary processing and forming, cavity multiplexing, cross talk elimination by arranging vertical and horizontal partition walls and the like.
The purpose of the invention is realized by the following technical scheme.
The utility model provides a double polarization weather radar's double polarization line feeds network, adopt air grid plate line structure form, divide two-layer cavity, the stromatolite relation is from last to being apron (1) down respectively, the medium supports 1 (2), inner conductor 1 (3), the medium supports 2 (4), erect partition wall 1 (5), cross-partition wall 1 (6), double-deck cavity (7), erect partition wall 2 (8), cross-partition wall 2 (9), the medium supports 3 (10), inner conductor 2 (11), the medium supports 4 (12), bottom plate (13), input/output port sets up to connector (14), isolation resistance (15) are chooseed for use in the isolation of horizontal polarization network and vertical polarization network circuit.
The cover plate (1) is used for signal shielding of a horizontal polarization circuit layer, the dielectric support 1 (2) is used for ensuring the required distance between the cover plate (1) and the inner conductor 1 (3), the inner conductor 1 (3) is used for forming a circuit layer of a horizontal polarization signal, the dielectric support 2 (4) is used for ensuring the required distance between the inner conductor 1 (3) and the double-layer cavity (7), the vertical partition wall 1 (5) is used for eliminating signal crosstalk between the longitudinal directions of the circuit of the inner conductor 1 (3), the transverse partition wall 1 (6) is used for eliminating signal crosstalk between the transverse directions of the circuit of the inner conductor 1 (3), the double-layer cavity (7) is used for forming an inner cavity of an air grid line and is simultaneously used for horizontal polarization and a vertical planning network, the vertical partition wall 2 (8) is used for eliminating signal crosstalk between the longitudinal directions of the circuit of the inner conductor 2 (11), the transverse partition wall 2 (9) is used for eliminating signal crosstalk between the circuit of the inner conductor 2 (11), the dielectric support 3 (10) is used for ensuring the required distance between the inner conductor 2 (11) and the double-layer (7), the inner conductor 2 (11) is used for forming a circuit layer, the vertical polarization circuit layer is used for ensuring the required distance between the inner conductor (1) and the circuit connection of the inner conductor (1), the insulation of the inner conductor (11), the inner conductor (14), the inner conductor (1), the inner conductor (11), the inner conductor (1) and the vertical polarization circuit layer is used for connecting the connection of the insulation of the circuit layer, the vertical polarization circuit board (14), the inner conductor 2 (11) is isolated for internal circuit matching.
The grid plate wire cavities of the horizontal polarization network and the vertical polarization network are preliminarily formed by drawing sectional materials.
The bottom plate and the cavity of the grid plate line structure of the horizontal polarization network and the vertical polarization network are shared.
Compared with the prior art, the invention has the advantages that: 1. the cost is low: the high-cost part of the invention is a double-layer cavity part, profile drawing is adopted, and the cavity structure required by the circuit is preliminarily molded at the raw material stage, so that the later machining cost is greatly reduced;
2. the weight is light: the dual-polarized line feed network changes the mode of independent design on various traditional circuit structures, and reuses the bottom plates of the horizontal polarization circuit and the vertical polarization circuit, and the weight of the dual-polarized line feed network is far less than that of the traditional discrete structure form;
3. high-precision amplitude and phase distribution: a certain number of vertical partition walls and transverse partition walls are integrated in the dual-polarized feed line network, so that the crosstalk of signals in the longitudinal direction and the transverse direction is eliminated, and the signal distribution and synthesis precision is improved.
Drawings
Fig. 1 is an electrical schematic diagram of a dual-polarized line feed network according to an embodiment of the present invention.
Fig. 2 is a diagram of a stacking relationship of dual-polarized feed networks according to an embodiment of the present invention.
Fig. 3 is an assembly diagram of a dual-polarized line feed network according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a dual-polarized feed line network according to an embodiment of the present invention, in which a cover plate is removed, and then a partial enlargement is performed.
Fig. 5 is a schematic diagram of a dual-polarized feed line network cover plate according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of an inner conductor 1 of a dual-polarized feed line network according to an embodiment of the present invention.
Fig. 7 is a schematic supporting diagram of the inner conductor 1 and the inner conductor 2 of the dual-polarized feed line network according to the embodiment of the invention.
Fig. 8 is a schematic cross-sectional view of a dual-layer cavity of a dual-polarized feed line network according to an embodiment of the present invention.
Fig. 9 is a partial schematic view of a double-layer cavity of a dual-polarized feed network according to an embodiment of the present invention.
Fig. 10 is a schematic diagram of welding dual-polarized feed network connectors according to an embodiment of the present invention.
Fig. 11 is a schematic diagram of isolation resistance welding of a dual-polarized feed-line network according to an embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the drawings and specific examples.
Referring to fig. 1, the dual-polarization feed-line network of the dual-polarization weather radar in the embodiment of the present invention has the functions of signal distribution and beam forming, and simultaneously realizes the distribution and synthesis of horizontal polarization signals and vertical plan signals. The dual-polarization line feed network (M4) adopts an air grid plate line structure form, is divided into two layers of cavities and a laminated relation, and consists of two layers of circuits, namely a horizontal polarization network (N1) and a vertical polarization network (N2), wherein the weight distribution of the two layers of networks is completely the same, and the electrical principle graph is completely the same, as shown in figure 1. The network is a 1-to-32 unequal network and is formed by cascading 31 unequal Wilkinson power dividing circuits (W1), wherein the power dividing circuits (W1) are connected by 50 ohm lines, output ports (P1-P32) are connected by a 50 ohm line (Z1), and an input port (P0) is connected by a 50 ohm line (Z2).
Referring to fig. 2, a cross-sectional laminated relation diagram of an embodiment of the present invention includes, from top to bottom, a cover plate (1), a dielectric support 1 (2), an inner conductor 1 (3), a dielectric support 2 (4), a vertical partition wall 1 (5), a transverse partition wall 1 (6), a double-layer cavity (7), a vertical partition wall 2 (8), a transverse partition wall 2 (9), a dielectric support 3 (10), an inner conductor 2 (11), a dielectric support 4 (12), and a bottom plate (13). The input/output port is set as a connector (14), and an isolation resistor (15) is selected for isolation of the horizontal polarization network circuit and the vertical polarization network circuit. The cover plate (1) and the bottom plate (13) are completely the same, the dielectric support (1) (2) is completely the same as the dielectric support (4) (12), the inner conductor (1) (3) is completely the same as the inner conductor (2) (11), the dielectric support (2) (4) is completely the same as the dielectric support (3) (10), the vertical partition wall (1) (5) is completely the same as the vertical partition wall (2) (8), and the transverse partition wall (1) (6) is completely the same as the transverse partition wall (2) (9).
Referring to fig. 3, an assembly diagram of an embodiment of the present invention is shown. The inner conductor 1 (2) and the inner conductor 2 (11) are arranged on two sides of the double-layer cavity (7) through the medium support 1 (2), the medium support 2 (4), the medium support 3 (10) and the medium support 4 (12). The inner conductor 1 (2), the medium support 1 (2) and the medium support 2 (4) are arranged in an upper cavity (7C) of the double-layer cavity (7), and the inner conductor 2 (11), the medium support 3 (10) and the medium support 4 (12) are arranged in a lower cavity (7D) of the double-layer cavity (7). The connector (14) is fixed on the long side surface of the double-layer cavity (7) through a screw (14B). The short side face is shielded through a side plate C1 and a side plate C2 through a screw D2, and the cover plate (1) is fixed on the double-layer cavity (7) through the screw D1. In order to install the line feed on the antenna array surface, a plurality of installation lugs (Z1) are arranged on the side surface of the long side of the double-layer cavity of the line feed.
Fig. 4 is a partially enlarged schematic view of the cover plate removed according to the embodiment of the invention. The circuits on both sides of the double-layer cavity (7) are the same, and the figure is a schematic diagram of an upper circuit. The inner conductor 1 (3) is arranged in the gap between the transverse partition walls (7A) of the upper cavity. When the transverse partition wall of the double-layer cavity (7) needs to be spanned, the transverse partition wall at the corresponding position needs to be removed, and signal intercommunication is realized. The inner conductor (3) adopts dielectric supports with various sizes due to different line widths of the supporting points, and the figure 7 shows that the inner conductor is a hollow conductor. In the area with smaller wiring distance of the inner conductor 1 (3), a transverse partition wall (6A) is arranged for narrowing the distance between the wiring and the grounding point and eliminating signal crosstalk; the vertical partition wall 5A and the vertical partition wall 5B are arranged to carry out signal shielding on the inner conductor 1 (3) in a longitudinal direction in a wiring manner. The inner conductor 1 (3) is too long in size and not easy to process, segmented design is carried out, and the segmented part is welded by soldering tin, and a welding observation hole (3C) is reserved in the position (3D) shown in the figure to guarantee welding quality. Middle holes in the transverse partition wall 1 (6A) and the vertical partition walls (5A and 5B) are used for being fixed with the cover plate (1), and the other two holes are used for being fixed with the double-layer cavity (7).
Fig. 5 is a schematic view of a cover plate according to an embodiment of the invention. The cover plate (1) is an aluminum plate with the thickness of 1.5mm, and a proper number of countersunk screw holes (1K) are arranged in the middle and used for fixing the cover plate (1) with the double-sided cavity (7), the transverse partition wall (1) (6) and the vertical partition wall (1) (5). Bottom plate (13) are the same with apron (1) thickness, all adopt aluminum plate preparation, and the structural relation is the mirror image relation, constitutes the line cavity of walking of inner conductor 2 (11) with two-sided cavity (7), horizontal partition wall 2 (9), perpendicular partition wall 2 (8).
Fig. 6 is a schematic view of the inner conductor 1 according to the embodiment of the present invention. The inner conductor is formed by performing line cutting on a copper plate with the thickness of 1.5mm, the line width of each part is calculated according to amplitude distribution, the surface is plated with silver to reduce transmission loss, and the through hole (3E) is used for placing a medium support. The inner conductor 2 (11) is completely the same as the inner conductor 1 (3), and the supporting mode is also completely the same, and only the inner conductor is arranged in the lower cavity of the double-layer cavity (7).
Fig. 7 is a schematic supporting diagram of the inner conductors 1 and 2 according to the embodiment of the present invention. In fig. 7 a), for the installation of the wider width part of the inner conductor 1 (3). One end of the medium support (2B) is inserted into the mounting hole 7G of the double-layer cavity (7) and used for fixing and supporting the inner conductor 1 (3), and the space between the inner conductor 1 (3) and the bottom of the double-layer cavity (7) is ensured to meet the design requirement. The other end of the medium support (2B) is inserted into a through hole (3E) of the inner conductor 1 (3), and the medium support (2A) is installed outside and used for fixing and supporting the inner conductor 1 (3) to ensure that the distance between the inner conductor 1 (3) and the cover plate of the double-layer cavity (7) meets the design requirement. The medium support 2A and the medium support 2B work together to ensure that the relative position of the inner conductor 1 (3) in the double-layer cavity (7) meets the design requirement. In 7 b), for the fixing of the narrower width lines of the inner conductor 1 (3). One end of the medium support (2D) is inserted into the mounting hole 7G of the double-layer cavity (7) and used for fixing and supporting the inner conductor 1 (3), and the space between the inner conductor 1 (3) and the bottom of the double-layer cavity (7) is ensured to meet the design requirement. The other end of the dielectric support (2D) is provided with a hole to wrap the inner conductor 1 (3), and the dielectric support (2C) is installed outside the dielectric support and used for fixing and supporting the inner conductor 1 (3) so as to ensure that the distance between the inner conductor 1 (3) and the cover plate of the double-layer cavity (7) meets the design requirement. The medium support 2C and the medium support 2D work together to ensure that the relative position of the inner conductor 1 (3) in the double-layer cavity (7) meets the design requirements. Similarly, the inner conductor 2 (11) is installed and fixed in the lower cavity of the double-layer cavity (7) according to the same method.
Fig. 8 is a schematic cross-sectional view of a double-layered cavity (7) according to an embodiment of the present invention. The upper part and the lower part of the cavity are respectively provided with 6 cavities (7C, 7D) which are processed by adopting a section drawing technology. The width and depth of the cavity must meet the design requirements. The upper horizontal partition wall (7A), the lower horizontal partition wall (7B) and the common bottom plate (7M) are used for forming shielding cavities of the inner conductors 1 (3) and 2 (11).
Fig. 9 is a partial schematic view of a double-layer cavity according to an embodiment of the invention. The double-layer cavity (7) is composed of a lateral side transverse partition wall (7E), an internal transverse partition wall (7N), a transverse partition wall and vertical partition wall fixing hole (7G), a cover plate fixing hole (7H), an inner conductor fixing hole (7J) and an inner conductor cross cavity area (7F). The vertical partition wall fixing hole (7G) and the cover plate fixing hole (7H) are threaded holes, and the inner conductor fixing hole (7J) is a blind hole.
Fig. 10 is a schematic diagram of connector soldering according to an embodiment of the present invention. The connector welding pin (H1) is directly welded on the inner conductor, in order to ensure the welding reliability, a small groove is processed at the welding position of the inner conductor, the welding pin (H1) is semi-embedded into the inner conductor, and then welding is carried out, so that the welding area can be increased, and the welding reliability is ensured.
Referring to fig. 11, an isolation resistance welding of an embodiment of the present invention is illustrated. The power distribution network is composed of Wilkinson power distribution circuit modules, in order to ensure isolation between ports, an isolation resistor (15) is arranged in the circuit to carry out port matching and eliminate signal crosstalk between the ports, the isolation resistor (15) is welded on an inner conductor through soldering tin, the isolation resistor (15) needs to be molded into an omega shape before welding, and stress is prevented from damaging the isolation resistor (15).
The dual-polarization line feed network of the dual-polarization meteorological radar is in a strip shape, and the external interfaces are uniformly distributed on two sides of a long edge and are distributed in an upper layer and a lower layer.
Claims (4)
1. The utility model provides a dual polarization weather radar's double polarization line feeds network, its characterized in that adopts the air grid plate line structure form, divide two-layer cavity, the stromatolite relation is from last to being apron (1) down respectively, the medium supports 1 (2), inner conductor 1 (3), the medium supports 2 (4), erect partition wall 1 (5), diaphragm wall 1 (6), double-deck cavity (7), erect partition wall 2 (8), diaphragm wall 2 (9), the medium supports 3 (10), inner conductor 2 (11), the medium supports 4 (12), bottom plate (13), input/output port sets up to connector (14), isolation resistance (15) are selected for use in the isolation of horizontal polarization network and vertical polarization network circuit.
2. The dual-polarized feed-through network for dual-polarized weather radar according to claim 1, wherein the cover plate (1) is used for signal shielding of the horizontally polarized circuit layer, the dielectric support 1 (2) is used for ensuring the required spacing between the cover plate (1) and the inner conductor 1 (3), the inner conductor 1 (3) is used for forming the circuit layer of the horizontally polarized signal, the dielectric support 2 (4) is used for ensuring the required spacing between the inner conductor 1 (3) and the double-layer cavity (7), the vertical partition wall 1 (5) is used for eliminating signal crosstalk between the circuit layers of the inner conductor 1 (3), the transverse partition wall 1 (6) is used for eliminating signal crosstalk between the circuit layers of the inner conductor 1 (3), the double-layer cavity (7) is used for forming the inner cavity of the air grid line and is used for both horizontal polarization and vertical planning network, the vertical partition wall 2 (8) is used for eliminating signal crosstalk between the circuit layers of the inner conductor 2 (11), the transverse partition wall 2 (9) is used for eliminating signal crosstalk between the circuit layers of the inner conductor 2 (11), the dielectric support 3) is used for ensuring the signal crosstalk between the circuit layers of the inner conductor 2 (7) and the vertical planning network, the vertical wiring is used for ensuring the connection between the signal layers of the inner conductor layers (1, 14) and the signal layers (11), the isolation resistor (15) is used for matching and isolating the internal circuits of the inner conductor 1 (3) and the inner conductor 2 (11).
3. The dual polarized feed line network of the dual polarized weather radar of claim 2, wherein the cavity of the grid lines of the horizontal polarized network and the vertical polarized network is formed by profile drawing.
4. A dual polarised feed line network for a dual polarised meteorological radar as claimed in claim 2, characterised in that the backplane and cavities of the grid line structure of the horizontally polarised network and the vertically polarised network are common.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211366385.4A CN115657042A (en) | 2022-11-01 | 2022-11-01 | Dual-polarization line feed network of dual-polarization meteorological radar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211366385.4A CN115657042A (en) | 2022-11-01 | 2022-11-01 | Dual-polarization line feed network of dual-polarization meteorological radar |
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| CN115657042A true CN115657042A (en) | 2023-01-31 |
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| CN202211366385.4A Pending CN115657042A (en) | 2022-11-01 | 2022-11-01 | Dual-polarization line feed network of dual-polarization meteorological radar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116937185A (en) * | 2023-07-28 | 2023-10-24 | 南京华成微波技术有限公司 | Intelligent double-polarized linear array microwave receiving and transmitting system |
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2022
- 2022-11-01 CN CN202211366385.4A patent/CN115657042A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116937185A (en) * | 2023-07-28 | 2023-10-24 | 南京华成微波技术有限公司 | Intelligent double-polarized linear array microwave receiving and transmitting system |
| CN116937185B (en) * | 2023-07-28 | 2024-02-23 | 南京华成微波技术有限公司 | Intelligent double-polarized linear array microwave receiving and transmitting system |
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