CN119108786A - A high temperature and high pressure resistant embedded waveguide aperture antenna for roll angle measurement - Google Patents
A high temperature and high pressure resistant embedded waveguide aperture antenna for roll angle measurement Download PDFInfo
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- CN119108786A CN119108786A CN202411388812.8A CN202411388812A CN119108786A CN 119108786 A CN119108786 A CN 119108786A CN 202411388812 A CN202411388812 A CN 202411388812A CN 119108786 A CN119108786 A CN 119108786A
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- antenna
- waveguide
- ammunition
- roll angle
- angle measurement
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/06—Waveguide mouths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a high-temperature-resistant high-pressure-resistant embedded waveguide opening antenna applied to roll angle measurement, and belongs to the technical field of microwave antennas. According to the invention, the waveguide opening antenna and the socket board are fastened at the tail part of the informationized ammunition in an embedded manner through the screws, the antenna housing can bear the high-temperature and high-pressure environment condition generated in the moment of ammunition firing, in the ammunition rolling process, the receiving Ka frequency band linear polarization radio frequency signals pass through the waveguide opening antenna in the same phase with the same amplitude, and then the receiving system and the decoding processing system are used for realizing analysis and calculation of the ammunition rolling angle.
Description
Technical Field
The invention belongs to the technical field of microwave antennas, and particularly relates to a high-temperature-resistant high-pressure-resistant embedded waveguide opening antenna applied to roll angle measurement.
Background
Informationized ammunition can be subjected to ballistic control of correction or guidance through information acquisition and transmission, and hit, damage or information antagonism is realized efficiently. The informationized ammunition usually rotates to fly forwards after being launched, and trajectory correction is carried out by receiving a correction instruction sent by the guidance radar and combining with self roll angle information, so that steering engine flying to a target is continuously controlled. The key of flight control is to receive the instruction of the guidance radar and the real-time measurement of the roll angle of the projectile, wherein the roll angle measurement is the basis of informationized ammunition flight control, and the measurement accuracy can directly influence the striking accuracy of the guidance projectile.
The roll angle measurement in the prior art depends on a gyroscope, a GPS and geomagnetism, the gyroscope can generate larger accumulated errors in the ammunition roll process and cannot work independently for a long time, the GPS has low data rate, is easy to interfere or shelter, has long initialization time, and has a measurement blind area in geomagnetism and is easy to interfere. The roll angle measurement method in the prior art can not solve the problem of informationized ammunition roll angle measurement.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the high-temperature-resistant high-pressure-resistant embedded waveguide opening antenna applied to roll angle measurement.
The technical problems proposed by the invention are solved as follows:
The high-temperature-resistant high-pressure-resistant embedded waveguide opening antenna comprises an antenna housing 1, a waveguide opening antenna 2, a socket board 3 and a radio frequency connector 4 which are connected in sequence, wherein the antenna housing is fixedly arranged at the tail part of informationized ammunition;
The antenna housing 1 is in a cylinder shape, and a circular blind groove is formed at the bottom of the antenna housing 1 and used as an assembly hole for bonding the antenna housing 1 on the waveguide opening antenna 2;
The waveguide opening antenna 2 comprises a housing and an inner cavity structure positioned inside the housing;
The shell is a two-stage cylinder which is connected in sequence, the cylinder adjacent to the radome 1 is marked as a first-stage cylinder, the diameter of the first-stage cylinder is smaller than that of the second-stage cylinder, and four rectangular blind grooves are formed in the outer wall of the second-stage cylinder and used for realizing the positioning between the waveguide opening antenna 2 and the informationized ammunition;
The cavity structure comprises two coaxial-waveguide antennas and a baffle plate, wherein the two coaxial-waveguide antennas are separated by the baffle plate, and the two coaxial-waveguide antennas have the same structure and comprise a waveguide and a stepped waveguide-coaxial conversion structure which are sequentially cascaded, and a blind hole is formed in a first step of the stepped waveguide-coaxial conversion structure;
The socket board 3 is provided with holes at the screw hole position at the bottom of the second-stage cylinder and the blind hole of the first-stage step, the antenna is embedded and fastened at the tail part of the informationized ammunition through the socket board 3 and the screw hole position of the second-stage cylinder, one end of the radio frequency connector 4 is inserted into the blind hole of the first-stage step through the hole of the socket board 3, and the other end is an SSMP-J interface.
Further, the specific mode for realizing the informationized ammunition roll angle measurement by using the antenna is as follows:
The electromagnetic wave emitted by the guidance radar is horizontally polarized, the ammunition rolling angle is alpha, the included angle between the trajectory tangent line and the guidance radar direction is theta, two coaxial-waveguide antennas in the waveguide opening antenna 2 are respectively marked as an antenna A and an antenna B, and the wave front phase difference reaching the antenna A and the antenna B is Wherein d ANT = (b+t) sin alpha, B is the narrow side of the waveguide cavity, t is the thickness of the baffle plate, and the wave fronts of the electric field emitted by the guidance radar reaching the antenna A and the antenna B are respectivelyAnd (3) withE 0 is the field intensity of the arriving ammunition, which is the unit vector in the horizontal direction of the earth;
the electric fields received by the antennas a and B are respectively:
EA＝-E0sinα
And constructing an amplitude expression of the sum path signal and the difference path signal by utilizing the electric fields received by the antenna A and the antenna B, and substituting the amplitude expressions of the sum path signal and the difference path signal which are actually received into the formula to calculate the roll angle of ammunition.
Furthermore, the antenna housing 1 is made of fused quartz ceramic with the density of 1.95+/-0.1 g/cm < 3 >, and can bear the high-temperature and high-pressure environment conditions generated at the moment of ammunition firing.
Further, the outer diameter D of the radome 1 is 15mm, the thickness L of the wave-transmitting region is 10mm, the diameter D of the fitting hole is 12mm, and the depth L' of the fitting hole is 2mm.
Further, the total length l of the housing of the waveguide aperture antenna 2 is 51.48mm, the diameter d 1 of the first stage cylinder is 12mm, the diameter d 2 of the second stage cylinder is 14mm, and the length l t of the second stage cylinder is 22.48mm.
Further, the second stage cylinder has a rectangular blind slot length s l of 16mm, a width s w of 3.5mm, and a depth s h of 2.55mm.
Furthermore, the stepped waveguide-coaxial switching structure adopts a 3-stage stepped form.
The beneficial effects of the invention are as follows:
according to the invention, the waveguide opening antenna and the socket board are fastened at the tail part of the informationized ammunition in an embedded manner through the screws, the antenna housing can bear the high-temperature and high-pressure environment condition generated in the moment of ammunition firing, in the ammunition rolling process, the receiving Ka frequency band linear polarization radio frequency signals pass through the waveguide opening antenna in the same phase with the same amplitude, and then the receiving system and the decoding processing system are used for realizing analysis and calculation of the ammunition rolling angle.
Drawings
Fig. 1 is a schematic structural diagram of a waveguide aperture antenna according to the present invention;
fig. 2 is a schematic structural diagram of a radome in the antenna according to the present invention;
FIG. 3 is a schematic diagram of a waveguide aperture antenna structure in an antenna according to the present invention;
Fig. 4 is a schematic diagram of an application scenario of the antenna according to the present invention;
fig. 5 is a sum and difference pattern of the antenna according to the present invention.
Detailed Description
The invention will be further described with reference to the drawings and examples.
The embodiment provides a high-temperature-resistant high-pressure-resistant embedded waveguide opening antenna applied to roll angle measurement, which is fixedly arranged at the tail part of informationized ammunition, and the structure schematic diagram is shown in fig. 1, and comprises an antenna housing 1, a waveguide opening antenna 2, a socket plate 3 and a radio frequency connector 4 which are sequentially connected.
The schematic structure of the radome 1 is shown in fig. 2, and is a cylinder, the bottom of the cylinder is provided with a circular blind groove as an assembly hole for adhering the radome 1 to the waveguide opening antenna 2, in this embodiment, the radome 1 is made of fused quartz ceramic with the density of 1.95+/-0.1 g/cm3, and can bear the conditions of high temperature and high pressure environment generated in the moment of ammunition firing. The outer diameter D of the radome 1 is 15mm, the thickness L of the wave-transmitting area is 10mm, the diameter D of the assembly hole is 12mm, and the depth L' of the assembly hole is 2mm.
The waveguide opening antenna 2 is schematically shown in fig. 3, and comprises a housing and an inner cavity structure positioned inside the housing;
The shell is two-stage cylinder that connects gradually, and total length l is 51.48mm, and diameter d 1 of first stage cylinder is 12mm, and diameter d 2 of second stage cylinder is 14mm, and length l t of second stage cylinder is 22.48mm. Four rectangular blind grooves are formed in the outer wall of the second-stage cylinder and used for achieving positioning between the waveguide opening antenna 2 and the informationized ammunition, the length s l of each rectangular blind groove is 16mm, the width s w is 3.5mm, the depth s h is 2.55mm, and a plurality of screw hole sites are arranged at the bottom of the second-stage cylinder and distributed on a circle with the diameter of 11.5 mm.
The inner cavity structure comprises two coaxial-waveguide antennas and a baffle plate, wherein the two coaxial-waveguide antennas are separated by the baffle plate, and the two coaxial-waveguide antennas have the same structure and comprise a waveguide and a stepped waveguide-coaxial conversion structure which are sequentially cascaded. The stepped waveguide-coaxial conversion structure adopts a 3-stage step form, and a blind hole is formed in a first-stage step.
In this embodiment, the width a of the waveguide cavity is 7.11mm, the narrow b is 3.56mm, the thickness t of the partition plate is 0.65mm, the step width w is 2mm, the first step length l 1 is 0.74mm, the height h 1 is 2.39mm, the second step length l 2 is 1.47mm, the height h 2 is 1.76mm, the third step length l 3 is 2.74mm, and the height h 3 is 0.88mm. The blind hole of the first step has a diameter dd of 0.2mm, a height hh of 1.78mm and a depth ll of 0.4mm.
The socket board 3 is provided with holes at the screw hole position at the bottom of the second-stage cylinder and the blind hole of the first-stage step, the antenna is embedded and fastened at the tail part of the informationized ammunition through the socket board 3 and the screw hole position of the second-stage cylinder, one end of the radio frequency connector 4 is inserted into the blind hole of the first-stage step through the hole of the socket board 3, and the other end is an SSMP-J interface.
In the ammunition rolling process, the high-temperature-resistant high-pressure-resistant embedded waveguide opening antenna applied to rolling angle measurement receives Ka frequency band linearly polarized radio frequency signals.
Specifically, the analysis and calculation of the ammunition roll angle are realized for the received Ka frequency band linear polarization radio frequency signals after passing through the waveguide opening antenna in the same phase with the same amplitude through the receiving system and the decoding processing system.
As shown in fig. 4, the electromagnetic wave emitted by the guidance radar is horizontally polarized, the ammunition roll angle is denoted as alpha, the included angle between the trajectory tangent and the guidance radar direction is denoted as theta, and the wave front phase difference reaching the antenna a and the antenna B is denoted asWherein d ANT = (b+t) sin alpha, the wave fronts of the electric field emitted by the guidance radar reaching the antenna A and the antenna B are respectivelyAnd (3) withE 0 is the field strength of the arriving ammunition, which is the unit vector in the horizontal direction of the earth. The polarization directions of the antenna A and the antenna B are the same, and the polarization directions are respectively:
the electric fields received by the antennas a and B are respectively:
The electric fields received by the antenna a and the antenna B during ammunition rolling are sinusoidal. And constructing an amplitude expression of the sum path signal and the difference path signal by using the electric fields received by the antenna A and the antenna B.
As shown in fig. 5, waveguide aperture antenna a and antenna B may form a sum and difference pattern. The radio frequency signals received by the antenna in the ammunition rolling process are projections of radio frequency signals emitted by the guidance radar in the polarization direction of the antenna, the sum path signals and the difference path signals also show sinusoidal changes in the ammunition rolling process, and the rolling angles of the ammunition are calculated by substituting the amplitudes of the sum path signals and the difference path signals into the formula.
According to the invention, the waveguide opening antenna and the socket board are fastened at the tail part of the informationized ammunition in an embedded manner through the screws, the antenna housing can bear the high-temperature and high-pressure environment condition generated in the moment of ammunition firing, in the ammunition rolling process, the receiving Ka frequency band linear polarization radio frequency signals pass through the waveguide opening antenna in the same phase with the same amplitude, and then the receiving system and the decoding processing system are used for realizing analysis and calculation of the ammunition rolling angle.
Claims (7)
1. The high-temperature-resistant high-pressure-resistant embedded waveguide opening antenna for roll angle measurement is characterized by comprising an antenna housing (1), a waveguide opening antenna (2), a socket board (3) and a radio frequency connector (4) which are connected in sequence, wherein the antenna housing is fixedly arranged at the tail part of informationized ammunition;
the antenna housing (1) is in a cylinder shape, and a circular blind groove is formed at the bottom of the antenna housing and used as an assembly hole for bonding the antenna housing (1) on the waveguide opening antenna (2);
the waveguide opening antenna (2) comprises a shell and an inner cavity structure positioned inside the shell;
the antenna housing is a two-stage cylinder which is sequentially connected, the cylinder adjacent to the antenna housing (1) is marked as a first-stage cylinder, the diameter of the first-stage cylinder is smaller than that of the second-stage cylinder, and four rectangular blind grooves are formed in the outer wall of the second-stage cylinder and used for realizing positioning between the waveguide opening antenna (2) and the informationized ammunition;
The cavity structure comprises two coaxial-waveguide antennas and a baffle plate, wherein the two coaxial-waveguide antennas are separated by the baffle plate, and the two coaxial-waveguide antennas have the same structure and comprise a waveguide and a stepped waveguide-coaxial conversion structure which are sequentially cascaded, and a blind hole is formed in a first step of the stepped waveguide-coaxial conversion structure;
The socket board (3) is provided with holes at the screw hole position at the bottom of the second-stage cylinder and the blind hole of the first-stage step, the antenna is embedded and fastened at the tail part of the informationized ammunition through the socket board (3) and the screw hole position of the second-stage cylinder, one end of the radio frequency connector (4) is inserted into the blind hole of the first-stage step through the hole of the socket board (3), and the other end is an SSMP-J interface.
2. The high-temperature and high-pressure resistant embedded waveguide opening antenna for roll angle measurement according to claim 1, wherein the specific way of realizing informationized ammunition roll angle measurement by using the antenna is as follows:
The electromagnetic wave emitted by the guidance radar is horizontally polarized, the ammunition rolling angle is alpha, the included angle between the trajectory tangent line and the guidance radar direction is theta, two coaxial-waveguide antennas in the waveguide opening antenna 2 are respectively marked as an antenna A and an antenna B, and the wave front phase difference reaching the antenna A and the antenna B is Wherein d ANT = (b+t) sin alpha, B is the narrow side of the waveguide cavity, t is the thickness of the baffle plate, and the wave fronts of the electric field emitted by the guidance radar reaching the antenna A and the antenna B are respectivelyAnd (3) with E 0 is the field intensity of the arriving ammunition, which is the unit vector in the horizontal direction of the earth;
the electric fields received by the antennas a and B are respectively:
EA＝-E0sinα
And constructing an amplitude expression of the sum path signal and the difference path signal by utilizing the electric fields received by the antenna A and the antenna B, and substituting the amplitude expressions of the sum path signal and the difference path signal which are actually received into the formula to calculate the roll angle of ammunition.
3. The high-temperature and high-pressure resistant embedded waveguide opening antenna applied to roll angle measurement according to claim 1, wherein the material of the antenna housing (1) is fused quartz ceramic with the density of 1.95+/-0.1 g/cm < 3 >, and the antenna housing can bear the high-temperature and high-pressure environment conditions generated in the moment of ammunition firing.
4. The high-temperature-resistant high-pressure-resistant embedded waveguide aperture antenna applied to roll angle measurement according to claim 1, wherein the outer diameter D of the radome (1) is 15mm, the thickness L of the wave-transmitting area is 10mm, the diameter D of the fitting hole is 12mm, and the depth L' of the fitting hole is 2mm.
5. The high-temperature-resistant high-pressure-resistant embedded waveguide aperture antenna applied to roll angle measurement according to claim 1, wherein the total length l of the housing of the waveguide aperture antenna (2) is 51.48mm, the diameter d 1 of the first-stage cylinder is 12mm, the diameter d 2 of the second-stage cylinder is 14mm, and the length l t of the second-stage cylinder is 22.48mm.
6. The high temperature and high pressure resistant embedded waveguide aperture antenna for roll angle measurement of claim 1, wherein the second stage cylinder has a rectangular blind slot length s l of 16mm, a width s w of 3.5mm, and a depth s h of 2.55mm.
7. The high-temperature-resistant high-pressure-resistant embedded waveguide aperture antenna for roll angle measurement according to claim 1, wherein the stepped waveguide-coaxial switching structure is in a 3-stage stepped form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411388812.8A CN119108786B (en) | 2024-09-30 | High-temperature-resistant high-pressure-resistant embedded waveguide opening antenna applied to roll angle measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411388812.8A CN119108786B (en) | 2024-09-30 | High-temperature-resistant high-pressure-resistant embedded waveguide opening antenna applied to roll angle measurement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN119108786A true CN119108786A (en) | 2024-12-10 |
| CN119108786B CN119108786B (en) | 2025-10-17 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3939040A1 (en) * | 1989-11-25 | 1991-05-29 | Standard Elektrik Lorenz Ag | Roll position measurement appts. for flying body - has two antennae fixed to flying body at orthogonal polarisation directions, different HF waveguide switch operating frequencies |
| US6016990A (en) * | 1998-04-09 | 2000-01-25 | Raytheon Company | All-weather roll angle measurement for projectiles |
| US7589663B1 (en) * | 2006-01-20 | 2009-09-15 | The United States Of America As Represented By The Secretary Of The Army | System and method for the measurement of the unambiguous roll angle of a projectile |
| KR20240141460A (en) * | 2023-03-20 | 2024-09-27 | 덕산넵코어스 주식회사 | Roll angle estimating apparatus and method |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3939040A1 (en) * | 1989-11-25 | 1991-05-29 | Standard Elektrik Lorenz Ag | Roll position measurement appts. for flying body - has two antennae fixed to flying body at orthogonal polarisation directions, different HF waveguide switch operating frequencies |
| US6016990A (en) * | 1998-04-09 | 2000-01-25 | Raytheon Company | All-weather roll angle measurement for projectiles |
| US7589663B1 (en) * | 2006-01-20 | 2009-09-15 | The United States Of America As Represented By The Secretary Of The Army | System and method for the measurement of the unambiguous roll angle of a projectile |
| KR20240141460A (en) * | 2023-03-20 | 2024-09-27 | 덕산넵코어스 주식회사 | Roll angle estimating apparatus and method |
Non-Patent Citations (1)
| Title |
|---|
| 周锦文等: "RFID近场天线应用及设计方法研究", 《舰船电子对抗》, vol. 39, no. 04, 25 August 2016 (2016-08-25), pages 40 - 46 * |
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