CN217544899U - Flat plate crack array antenna for submarine radar - Google Patents
Flat plate crack array antenna for submarine radar Download PDFInfo
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- CN217544899U CN217544899U CN202221297658.XU CN202221297658U CN217544899U CN 217544899 U CN217544899 U CN 217544899U CN 202221297658 U CN202221297658 U CN 202221297658U CN 217544899 U CN217544899 U CN 217544899U
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Abstract
The utility model discloses a dull and stereotyped crack array antenna for submarine radar mainly solves the problem that current submarine radar antenna overall dimension is great, the loss is big, receipt and transmission can't go on simultaneously. The antenna comprises an antenna (1), an antenna housing (2) and a base (3), wherein the antenna is a cuboid flat plate split array antenna which is provided with a power distribution network waveguide cavity (111), a horn array (132), a split array (133) and a resonant cavity array (134) to form two antenna arrays which are symmetrical about a neutral plane and independent in function, and a transceiving isolation rib (131) is arranged between the two antenna arrays and used for transmitting and receiving radar electromagnetic waves; this antenna house cladding whole antenna, and inner chamber and antenna overall dimension are unanimous for antenna house and antenna closely laminate, the antenna forms the structural support to the antenna house simultaneously. The radar has the advantages of small overall dimension, low loss, strong water pressure resistance, capability of receiving and transmitting simultaneously, and suitability for submarine radars.
Description
Technical Field
The utility model belongs to the technical field of the antenna, concretely relates to dull and stereotyped crack array antenna, it is applicable in submarine radar.
Background
The radar antenna is an indispensable part of a radar apparatus, and the azimuth and elevation of a radar measurement target are directly related to the performance of the radar antenna. The radar antenna is generally placed in the open air to work, and the performance of the radar antenna is reduced and the service life of the radar antenna is shortened due to the direct influence of wind, rain, ice, snow, dust, solar radiation, smoke and the like in the natural environment. The antenna housing is made of a material with high transmittance to electromagnetic waves, can protect the antenna from being influenced by severe natural environment, reduces abrasion, corrosion and aging of the antenna, enables the performance of the antenna to be stable and reliable, and prolongs the service life.
The submarine radar antenna is directly exposed in seawater and moves up and down along with the submarine body in the seawater, so that the submarine radar antenna also needs to have corresponding water pressure resistant sealing performance; meanwhile, due to the limitation of installation space and wind and wave resistance, the aperture of the submarine radar antenna is generally small, and particularly the height dimension is about 200 mm.
The existing submarine radar antenna has two structural forms: one is a parabolic antenna; the other is an array antenna, which comprises a microstrip array antenna and a slot array antenna.
The parabolic antenna comprises a reflector and a feed source, wherein the reflector is a solid body, only a feed source horn needs to be covered and sealed, but the feed source must be positioned at the focal position of the reflecting surface, and the reflector and the feed source need to be supported and sealed by a base, so that the size of the whole antenna is large, the occupied space for installation is large, the opening of the submarine body is large, and meanwhile, two independent antennas for receiving and transmitting can not be arranged simultaneously.
The array antenna aims at the requirement of the submarine radar antenna on water pressure resistance and sealability, and the whole antenna needs to be coated by an antenna housing. The existing submarine radar antenna adopts an arc-shaped antenna front cover, the antenna housing is not contacted with an antenna surface, the seawater pressure is completely born by the antenna housing, and the thickness of the antenna housing is large. Due to the fact that the arc-shaped antenna housing has different losses and phase changes to microwaves at different angles, antenna gain loss is large, an antenna directional diagram is distorted, the effective size of the antenna is small, the weight of the antenna is large, and the performance of the radar antenna is reduced greatly particularly for large-submarine submarines. Meanwhile, the height dimension of the antenna is positively correlated with the thickness of the antenna housing, the thickness of the antenna housing is large, the effective height of the antenna is generally small, and the radar antenna occupies a large installation space. Therefore, the existing submarine radar array antenna can only be provided with one antenna array and cannot be suitable for continuous wave system radars which receive and transmit simultaneously.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to current submarine radar antenna not enough, provide a dull and stereotyped crack array antenna for submarine radar to reduce radar antenna overall dimension, reduce the influence of antenna house to gain and directional diagram, the water pressure resistant ability of reinforcing radar antenna can arrange two independent antennas of function simultaneously, satisfies the operation requirement of the radar of continuous wave system.
In order to achieve the above object, the utility model discloses a dull and stereotyped crack array antenna includes antenna 1, antenna house 2 and base 3, the complete cladding antenna of antenna house, its characterized in that: the size of the inner cavity of the antenna housing 2 is consistent with the size of the external dimension of the antenna 1, so that the inner surface of the antenna housing can be tightly attached to the outer surface of the antenna, the antenna housing is used for accommodating and sealing the flat plate slot array antenna, and meanwhile, the antenna forms structural support for the antenna housing;
the antenna 1 adopts a flat plate slot array antenna with the shape of an approximate cuboid, and comprises an antenna front block 13, an antenna middle block 12 and an antenna rear block 11 which are symmetrical about a neutral plane and are fastened and connected by adopting dense screws to form two antenna arrays which are symmetrical about the neutral plane and have independent functions and are used for transmitting and receiving radar electromagnetic waves;
one side of the antenna front block 13 is provided with a transmitting-receiving isolation rib 131, a horn array 132 and a crack array 133, and the other side is provided with a resonant cavity array 134;
one surface of the antenna rear block 11 is provided with two power division network waveguide cavities 111;
the antenna middle block 12 is a thin plate with a waveguide port, one surface of the thin plate is connected with an antenna front block, and the other surface of the thin plate is connected with an antenna rear block and used for covering and communicating the power division network waveguide cavity 111 and the resonant cavity 134;
the antenna housing 2 comprises an antenna front cover 21, an antenna rear cover 23 and a sealing ring 22;
the antenna front cover 21 is made of wave-transparent material, is positioned in front of the radiation surface of the flat plate slot array antenna, and is provided with a continuously coated isolating strip 211 at the position contacting with the transmitting-receiving isolating rib 131;
the inner cavity of the antenna rear cover 23 is a cuboid, and is tightly connected with the antenna front cover 21 and sealed by a sealing ring 22.
Preferably, the antenna 1 is provided with a coaxial converter 15 connected to a coaxial cable 16 for transmitting microwave signals of the antenna, and the other end of the coaxial cable is provided with a coaxial cable interface 14 connected to an external device.
Preferably, the base 3 is disposed at the bottom of the antenna rear cover 23 and is integrated with the antenna rear cover for connecting with external equipment, and a through hole 232 is disposed in the middle of the base for transmitting signals of the antenna (1).
Preferably, a spring 4 is provided between the antenna rear cover 23 and the antenna 1 to press the antenna forward and to bring the antenna front block 13 into close contact with the antenna front cover 21, thereby preventing a decrease in the transmission/reception isolation between the transmission/reception antennas due to microwave leakage.
Preferably, a reinforcing structure 231 connected to the base is provided on the rear surface of the antenna rear cover 23 to reinforce the connection strength and rigidity of the antenna rear cover, and a sealing groove 233 is provided on the front surface thereof to mount the sealing ring 22.
Preferably, the antenna rear cover 23 is made of a carbon fiber composite material.
Preferably, the antenna front cover 21 is made of a quartz fiber cyanate composite material.
The utility model has the advantages of it is following:
1) The antenna of the utility model adopts a flat plate structure, so that the antenna has smaller overall dimension, especially smaller thickness, and the occupied space required by the installation of the radar antenna is smaller;
2) The antenna of the utility model forms structural support for the antenna housing, so that the thickness of the front cover of the antenna is thin, the loss is small, and the water pressure resistance of the antenna is strong, thus being applicable to large submarine radar;
3) The utility model discloses owing to set up two independent antenna array of function for the radar can receive simultaneously and launch, satisfies the demand of continuous wave system submarine radar.
Drawings
FIG. 1 is an overall configuration diagram of the present invention;
FIG. 2 is an exploded view of the structure of FIG. 1;
FIG. 3 is a side cutaway view of FIG. 1;
FIG. 4 is a top cut-away view of FIG. 1;
fig. 5 is an enlarged view of the planar slot array antenna of fig. 3;
FIG. 6 is an enlarged view of the front cover of the antenna of FIG. 3;
fig. 7 is an enlarged view of the antenna back case of fig. 3.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1 and 2, the submarine radar antenna of this embodiment includes antenna 1, antenna house 2 and base 3, the complete cladding antenna of antenna house, 2 inner chamber size of dimensions of antenna house are unanimous with 1 overall dimension size of antenna, make the internal surface of antenna house and the surface of antenna can closely laminate, be used for holding and sealed protection flat plate crack array antenna, the antenna forms the structural support to the antenna house simultaneously, submarine radar antenna main part is thin cuboid appearance, antenna length is 1000mm in this example, highly is 250mm, thickness is 100mm, the diameter of the disc base 3 of bottom is 250mm.
Referring to fig. 3, 4 and 5, the antenna 1 is a flat plate slot array antenna with an approximately rectangular parallelepiped shape, and includes an antenna front block 13, an antenna middle block 12 and an antenna rear block 11, which are all vertically symmetrical for convenience of processing and forming, and are fastened and connected by dense screws, so as to form two antenna arrays that are vertically symmetrical and functionally independent, and are used for transmitting and receiving radar electromagnetic waves.
One side of the antenna front block 13 is distributed with a resonant cavity array 134, the middle position of the other side is provided with a transmitting-receiving isolation rib 131, two sides of the transmitting-receiving isolation rib are distributed with vertically symmetrical crack arrays 133, a horn array 132 with the height of one quarter wavelength of the microwave of the working center frequency of the antenna is arranged between the adjacent crack arrays, and the inclination angle of the horn and the width of the rib between the adjacent horns are preset values respectively; the loudspeaker height is 8mm in this embodiment, and the angle of inclination is 45, and the horn mouth is wide 15.5mm, and rib top surface width is 11mm between adjacent loudspeaker, and the width of receiving and dispatching isolation muscle is about 17mm, highly and crack horn mouth parallel and level.
The antenna rear block 11 is mainly provided with two power division network waveguide cavities 111 which are symmetrical up and down, a coaxial converter 15 is arranged at the input and output position of a microwave signal of the power division network waveguide cavity, the coaxial converter is connected with a coaxial cable 16 and used for transmitting the microwave signal of the antenna, a coaxial cable interface 14 connected with external equipment is arranged at the other end of the coaxial cable, and the coaxial cable interfaces of the two antenna arrays are arranged adjacently.
The antenna middle block 12 is a thin plate with a waveguide port, one surface of which is connected with the antenna front block and the other surface of which is connected with the antenna rear block, and is used for covering and communicating the power division network waveguide cavity 111 and the resonant cavity 134.
The joint surfaces among the antenna front block 13, the antenna middle block 12 and the antenna rear block 11 are all planes, and the three parts are fastened by adopting dense screws so as to reduce leakage among cavities, and particularly, the screws are arranged more densely at the receiving and transmitting isolation ribs 131. Between the antenna rear block and the antenna rear cover 23, 4 springs 4 are provided for pushing the antenna forward, so that the transmission/reception isolation rib 131 of the antenna front block 13 is closely attached to the antenna front cover 21, thereby preventing the transmission/reception isolation from being lowered due to the leakage of microwaves between the transmission/reception antenna and the reception antenna.
Antenna 1 all adopts the aluminum alloy material of high strength, and the rib between the inside cavity sets up enough thickness to resist sea water pressure, the pressure direct transmission of outside sea water effect on antenna house 2 is for inside dull and stereotyped crack array antenna 1.
Referring to fig. 3 and 4, the antenna housing 2 includes an antenna front cover 21, an antenna rear cover 23 and a sealing ring 22, the antenna front cover and the antenna rear cover are fastened and connected by bolts and sealed by the sealing ring 22, so that the radar antenna integrally meets the integral pressure resistance and the sealing structure strength of the submarine under the maximum submergence depth condition;
referring to fig. 6, the antenna front cover 21 is made of a quartz fiber cyanate composite material with a dielectric constant of 3.2 and a bending strength limit of 370MPa, is located in front of a radiation surface of the planar slot array antenna, and has an inner side surface which is a plane and is in contact with a rib plane between the planar slot array antenna horns; the thickness of the antenna is determined according to the optimal wave-transparent theory of the medium, the structural strength of the antenna supported by ribs among the flat plate slot array antenna horns under the maximum diving depth condition is checked, and the minimum order thickness is selected on the premise of meeting the structural strength, and the thickness of the antenna is 8.5mm. The contact position of the antenna front cover and the receiving and transmitting isolation rib 131 of the antenna 1 is provided with an isolation strip 211 which has a trapezoidal section and is continuously coated by the antenna front cover so as to keep the sealing property; a metallic reflective layer 212 is provided on the outer surface of the barrier rib coating layer to improve the isolation.
Referring to fig. 7, the inner cavity of the antenna rear cover 23 is a cuboid, the inner cavity is made of a carbon fiber composite material, the back surface of the antenna rear cover is provided with a reinforcing structure 231 connected with the base for reinforcing the connection strength and rigidity of the antenna rear cover, and the front surface of the antenna rear cover is provided with a sealing groove 233 for installing the sealing ring 22.
The base 3 is arranged at the bottom of the antenna rear cover 23, and forms an integral structure with the antenna rear cover for connecting with external equipment, and a through hole 232 is arranged in the middle of the base for transmitting signals of the antenna 1.
The above description is only a specific example of the present invention and does not constitute any limitation to the present invention, and it is obvious to those skilled in the art that various modifications and changes in form and details can be made without departing from the principle and structure of the present invention after understanding the content and principle of the present invention, but such modifications and changes based on the idea of the present invention are still within the scope of the appended claims.
Claims (7)
1. The utility model provides a dull and stereotyped crack array antenna for submarine radar, includes antenna (1), antenna house (2) and base (3), and the antenna house wraps up the antenna completely, its characterized in that: the size of the inner cavity of the antenna housing (2) is consistent with the size of the external dimension of the antenna (1), so that the inner surface of the antenna housing can be tightly attached to the outer surface of the antenna for accommodating and sealing the flat plate slot array antenna, and meanwhile, the antenna forms structural support for the antenna housing;
the antenna (1) adopts a flat plate slot array antenna with the appearance of an approximate cuboid, and comprises an antenna front block (13), an antenna middle block (12) and an antenna rear block (11), which are symmetrical about a neutral plane and are fastened and connected by adopting dense screws to form two antenna arrays which are symmetrical about the neutral plane and have independent functions and are used for transmitting and receiving radar electromagnetic waves;
one side of the antenna front block (13) is provided with a transmitting-receiving isolation rib (131), a horn array (132) and a crack array (133), and the other side is provided with a resonant cavity array (134);
one surface of the antenna rear block (11) is provided with two power division network waveguide cavities (111);
the antenna middle block (12) is a thin plate with a waveguide port, one surface of the thin plate is connected with an antenna front block, and the other surface of the thin plate is connected with an antenna rear block and used for covering and communicating a power distribution network waveguide cavity (111) and a resonant cavity array (134);
the antenna housing (2) comprises an antenna front cover (21), an antenna rear cover (23) and a sealing ring (22);
the antenna front cover (21) is made of wave-transmitting materials, is positioned in front of the radiation surface of the flat plate slot array antenna, and is provided with a continuously coated isolating strip (211) at the position contacted with the transceiving isolating rib (131);
the inner cavity of the antenna rear cover (23) is a cuboid, and the antenna rear cover is tightly connected with the antenna front cover (21) and sealed through a sealing ring (22).
2. An antenna according to claim 1, characterized in that the antenna (1) is provided with a coaxial converter (15) which is connected to a coaxial cable (16) for transmitting the microwave signal of the antenna, and the other end of the coaxial cable is provided with a coaxial cable interface (14) for connection to external equipment.
3. The antenna according to claim 1, characterized in that the base (3) is arranged at the bottom of the antenna back cover (23) and is integrated with the antenna back cover for connecting with external equipment, and the base is provided with a through hole (232) in the middle for transmitting signals of the antenna (1).
4. The antenna according to claim 1, wherein a spring (4) is provided between the antenna rear cover (23) and the antenna (1) for pushing the antenna forward to make the antenna front block (13) and the antenna front cover (21) closely contact each other, thereby preventing the receiving and transmitting isolation from being reduced due to microwave leakage between the receiving and transmitting antennas.
5. The antenna according to claim 1, wherein the antenna rear cover (23) is provided with a reinforcing structure (231) connected with the base on the back surface for enhancing the connection strength and rigidity of the antenna rear cover, and is provided with a sealing groove (233) on the front surface for installing the sealing ring (22).
6. An antenna according to claim 1, characterized in that the antenna back cover (23) is made of carbon fibre composite.
7. An antenna according to claim 1, characterized in that the front antenna cover (21) is made of a quartz fibre cyanate ester composite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221297658.XU CN217544899U (en) | 2022-05-26 | 2022-05-26 | Flat plate crack array antenna for submarine radar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221297658.XU CN217544899U (en) | 2022-05-26 | 2022-05-26 | Flat plate crack array antenna for submarine radar |
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| Publication Number | Publication Date |
|---|---|
| CN217544899U true CN217544899U (en) | 2022-10-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221297658.XU Active CN217544899U (en) | 2022-05-26 | 2022-05-26 | Flat plate crack array antenna for submarine radar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114883775A (en) * | 2022-05-26 | 2022-08-09 | 陕西长岭电子科技有限责任公司 | Flat plate crack array antenna of submarine radar |
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2022
- 2022-05-26 CN CN202221297658.XU patent/CN217544899U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114883775A (en) * | 2022-05-26 | 2022-08-09 | 陕西长岭电子科技有限责任公司 | Flat plate crack array antenna of submarine radar |
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