CN118017237A - Travelling wave waveguide slot array antenna and use method thereof - Google Patents
Travelling wave waveguide slot array antenna and use method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of antennas, and discloses a traveling wave waveguide slot array antenna and a use method thereof, wherein the traveling wave waveguide slot array antenna comprises a rectangular waveguide; the top end of the rectangular waveguide is used for being connected with a microwave electromagnetic energy source, and the bottom end of the rectangular waveguide is opened; the rectangular waveguide is used for transmitting TE 10 mode electromagnetic waves; a plurality of broadside longitudinal radiation slits are formed in the broadsides of the rectangular waveguide, and the broadside longitudinal radiation slits are uniformly distributed along the length direction of the broadsides of the rectangular waveguide; a plurality of narrow-side oblique radiation slits are formed on the narrow side of the rectangular waveguide, and are uniformly distributed along the length direction of the narrow side of the rectangular waveguide; the invention has the advantages of wider bandwidth, large power capacity, high stability, high radiation efficiency and low sensitivity to the requirements of the working environment.
Description
Technical Field
The invention belongs to the technical field of antennas, and particularly relates to a traveling wave waveguide slot array antenna and a use method thereof.
Background
In the civil engineering field, in order to ensure engineering construction safety, a soft loess foundation needs to be subjected to heat strengthening treatment, and the existing heat strengthening treatment method comprises a conventional heating method and a microwave heating method; the conventional heating method generally adopts modes of fossil fuel combustion, heating wire heating, chemical reaction fixed heat and the like, and utilizes principles of radiation convection, heat conduction and the like to heat materials; the microwave heating method is a heat strengthening mode which utilizes microwaves to heat the soil body to high temperature so as to eliminate the collapsibility of the soil body, increase the strength of the soil body and improve the bearing capacity of the foundation.
At present, the loess foundation is thermally reinforced by using a circular waveguide slot antenna in the prior art, but the conventional circular waveguide slot antenna is a standing wave antenna, has a narrow bandwidth and is sensitive to the requirements of working environments; meanwhile, when the loess foundation is thermally reinforced, the defects of unstable radiation efficiency and low working efficiency exist.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a travelling wave waveguide slot array antenna and a use method thereof, so as to solve the technical problems that the conventional circular waveguide slot antenna is a standing wave antenna, has narrower bandwidth and is sensitive to the requirements of working environment.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The invention provides a traveling wave waveguide slot array antenna, which comprises a rectangular waveguide; the top end of the rectangular waveguide is used for being connected with a microwave electromagnetic energy source, and the bottom end of the rectangular waveguide is opened;
The rectangular waveguide is used for transmitting TE 10 mode electromagnetic waves;
A plurality of broadside longitudinal radiation slits are formed in the broadsides of the rectangular waveguide, and the broadside longitudinal radiation slits are uniformly distributed along the length direction of the broadsides of the rectangular waveguide;
And a plurality of narrow-side oblique radiation slits are formed on the narrow side of the rectangular waveguide, and are uniformly distributed along the length direction of the narrow side of the rectangular waveguide.
Further, the long axis direction of the broadside longitudinal radiation slit is parallel to the long axis center line of the broadside of the rectangular waveguide; the length of the broadside longitudinal radiation gap is changed in the direction from the top end to the bottom end of the rectangular waveguide.
Further, the plurality of broadside longitudinal radiation slits are all arranged offset from the broadside long axis center line of the rectangular waveguide, and two adjacent broadside longitudinal radiation slits are positioned on two sides of the broadside long axis center line of the rectangular waveguide.
Further, in the direction from the top to the bottom of the rectangular waveguide, the offset distance of the broadside longitudinal radiation slit from the broadside long axis center line of the rectangular waveguide is set to be variable.
Further, the center of the narrow-side oblique radiation slit is positioned on the center line of the narrow-side long axis of the rectangular waveguide;
The middle part of the narrow-side inclined radiation slit penetrates through the narrow side of the rectangular waveguide, and the end part of the narrow-side inclined radiation slit cuts into the wide side of the rectangular waveguide;
the end cutting depth of the narrow-side oblique radiation slit is changed in the direction from the top end to the bottom end of the rectangular waveguide.
Further, the narrow-side oblique radiation slits are arranged in a deflection manner along the normal direction of the narrow side of the rectangular waveguide; wherein, at different positions of the narrow side of the rectangular waveguide, the deflection angles of the narrow side oblique radiation slits are different.
Further, two adjacent narrow-side oblique radiation slits are arranged in a splayed structure.
Further, the device also comprises a waveguide flange plate; the waveguide flange plate is arranged at the top end of the rectangular waveguide, one side of the waveguide flange plate is connected with the top end of the rectangular waveguide, and the other side of the waveguide flange plate is used for being connected with a microwave electromagnetic energy source.
Further, the waveguide flange adopts a BJ-26 standard rectangular waveguide flange.
The invention also provides a using method of the travelling wave waveguide slot array antenna, which is used for the heat reinforcement treatment process of the loess foundation;
The application method of the travelling wave waveguide slot array antenna comprises the following steps:
An antenna placement groove is formed in a loess foundation to be treated, and the travelling wave waveguide slot array antenna is vertically placed in the antenna placement groove;
Connecting a microwave electromagnetic energy source with the top end of a rectangular waveguide in the travelling wave waveguide slot array antenna;
And starting a microwave electromagnetic energy source, and heating and sintering the loess foundation to be treated by utilizing electromagnetic energy radiated outwards by the travelling wave waveguide slot array antenna.
Compared with the prior art, the invention has the beneficial effects that:
according to the travelling wave waveguide slot array antenna provided by the invention, the rectangular waveguide is used as the matrix of the travelling wave waveguide slot array antenna, the electromagnetic energy radiated to the periphery of the side surface of the antenna and the space at the bottom is realized through the waveguide slot array and the terminal open circuit on the rectangular waveguide, the electromagnetic energy radiated outwards can be converted into heat energy in the loess foundation to be treated, so that the collapsibility of the loess foundation to be treated is eliminated, the heat reinforcement treatment of the loess foundation is realized, and the carrying capacity of the loess foundation is effectively improved; specifically, a plurality of wide-side longitudinal radiation slits are formed on the wide side of the rectangular waveguide, and a plurality of narrow-side oblique radiation slits are formed on the narrow side of the rectangular waveguide so as to form a waveguide slit array around the rectangular waveguide; the waveguide slot array radiates the input electromagnetic energy to the space around the side face of the rectangular waveguide, so that the working bandwidth of the travelling wave waveguide slot array antenna is effectively improved; secondly, arranging the bottom end opening of the rectangular waveguide to form an open-ended structure at the terminal of the line waveguide slot array antenna so as to radiate the input electromagnetic energy to the bottom space of the antenna; the travelling wave waveguide slot array antenna has the advantages of wide bandwidth, large power capacity, high stability, high radiation efficiency and low sensitivity to requirements of working environment; meanwhile, the terminal open circuit can realize that the terminal is matched to absorb electromagnetic energy and radiate a directional pattern with the maximum radiation direction facing the ground in the far field of the antenna.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a traveling wave waveguide slot array antenna according to an embodiment;
fig. 2 is a front view of a traveling wave waveguide slot array antenna according to an embodiment;
fig. 3 is a left side view of a traveling wave waveguide slot array antenna according to an embodiment;
Fig. 4 is a top view of a traveling wave waveguide slot array antenna according to an embodiment;
FIG. 5 is a schematic view of a partial structure of a broadside longitudinal radiation slit in an embodiment;
FIG. 6 is a schematic view of a partial structure of a narrow-side oblique radiation slit in an embodiment;
FIG. 7 is a graph of the reflection coefficient simulation result of the traveling wave waveguide slot array antenna according to the embodiment;
fig. 8 is a far-field radiation pattern of the traveling wave waveguide slot array antenna according to the embodiment at a frequency of 2.45 GHz and an observation angle phi=13°.
1, A waveguide flange plate; 2. a rectangular waveguide; 3. a broadside longitudinal radiating slit; 4. a narrow side oblique radiation slit; 5. the terminal is open.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the following specific embodiments are used for further describing the invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Examples
The embodiment provides a traveling wave waveguide slot array antenna which is used for the thermal reinforcement treatment process of loess foundations.
As shown in fig. 1-6, the travelling wave waveguide slot array antenna according to the present embodiment includes a waveguide flange 1 and a rectangular waveguide 2 coaxially arranged; specifically, the central axes of the waveguide flange 1 and the rectangular waveguide 2 are positioned on the same vertical straight line and are fixedly connected from top to bottom; the top end of the rectangular waveguide 2 is connected with a microwave electromagnetic energy source through the waveguide flange plate 1; the bottom end of the rectangular waveguide 2 is opened to form an open-ended circuit 5 at the bottom end of the rectangular waveguide 2; preferably, the travelling wave waveguide slot array antenna adopts an all-metal structure.
The waveguide flange plate 1 is arranged at the top end of the rectangular waveguide 2 and is used for connecting the rectangular waveguide 2 with the microwave electromagnetic energy source; one side of the waveguide flange 1 is connected with the top end of the rectangular waveguide 2, and the other side of the waveguide flange 1 is connected with a microwave electromagnetic energy source; preferably, the travelling wave waveguide slot array antenna adopts BJ-26 standard waveguide feed, and the waveguide flange 1 adopts BJ-26 standard rectangular waveguide flange.
The rectangular waveguide 2 is used for transmitting electromagnetic waves in TE 10 (TRANSVERSE MAGNETIC 01) modes; the rectangular waveguide 2 comprises two broad sides and two short sides; the two broadsides are arranged in parallel relatively, the two short sides are arranged in parallel relatively, and the two broadsides and the two narrow sides are surrounded to form the rectangular waveguide 2; the TM 01 (TRANSVERSE MAGNETIC 01) mode is the first mode of the transverse wave modes (TRANSVERSE MAGNETIC mode, TM).
A plurality of broadside longitudinal radiation slits 3 are formed in the broadside of the rectangular waveguide 2, and the broadside longitudinal radiation slits 3 are uniformly distributed along the length direction of the broadside of the rectangular waveguide 2; the wide-side longitudinal radiation slit 3 is an oblong slit, and the long axis direction of the wide-side longitudinal radiation slit 3 is parallel to the long axis center line of the wide side of the rectangular waveguide 2; the wide-side longitudinal radiation slits 3 are all arranged offset from the long-axis center line of the wide side of the rectangular waveguide 2; in the length direction of the wide side of the rectangular waveguide 2, two adjacent wide side longitudinal radiation slits 3 are positioned at two sides of the long axis center line of the wide side of the rectangular waveguide 2.
The length L m of the broadside longitudinal radiation slit 3 is changed and set in the direction from the top end to the bottom end of the rectangular waveguide 2, and the deviation distance P m of the broadside longitudinal radiation slit 3 from the broadside central line of the rectangular waveguide 2 is changed and set; wherein M is the serial number of the broadside longitudinal radiation slits 3 arranged on a single broadside in the rectangular waveguide 2, M is more than or equal to 1 and less than or equal to M, and M is the total number of the broadside longitudinal radiation slits 3 arranged on a single broadside in the rectangular waveguide 2; as m increases, the length L m of the broadside longitudinal radiation slit 3 and the value of the offset distance P m generally tend to increase.
The offset distance P m is a distance between the long axis center line of the broadside longitudinal radiation slot 3 and the long axis center line of the broadside of the rectangular waveguide 2; and the serial number m of the wide-edge longitudinal radiation slots 3 arranged on the single wide edge in the rectangular waveguide 2 is obtained by sequentially numbering the wide-edge longitudinal radiation slots 3 arranged on the single wide edge in the rectangular waveguide 2 according to the direction from the top end to the bottom end of the rectangular waveguide 2.
In this embodiment, 20 wide-edge longitudinal radiation slits 3 are uniformly disposed on a single wide edge in the rectangular waveguide 2, that is, m=20; the width B of each broadside longitudinal radiation slit 3 is 6.11mm, and the slit distance d of every two adjacent broadside longitudinal radiation slits 3 is 85mm; the length L m and the offset distance P m of the broadside longitudinal radiation slit 3 are shown in table 1 below.
TABLE 1 Length L m and offset distance P of broadside longitudinal radiating slit 3 m
It should be noted that, two wide sides are oppositely disposed in the rectangular waveguide 2, and the longitudinal radiation slits 3 of the wide sides are disposed in mirror symmetry along the center line of the rectangular waveguide 2; specifically, two wide edges are oppositely arranged in the rectangular waveguide 2, the wide edge longitudinal radiation slits 3 are correspondingly arranged one by one, and the two opposite wide edge longitudinal radiation slits 3 have the same size; that is, on two opposite broad sides, the broad side longitudinal radiation slits 3 at the same height level are the same in size and are arranged in mirror symmetry along the center line of the rectangular waveguide 2.
A plurality of narrow-side oblique radiation slits 4 are formed on the narrow side of the rectangular waveguide 2, and the narrow-side oblique radiation slits 4 are uniformly distributed along the length direction of the narrow side of the rectangular waveguide 2; the narrow-side oblique radiation slit 4 is a rectangular slit and is obliquely arranged on the narrow side of the rectangular waveguide 2.
Specifically, the center of the narrow-side oblique radiation slot 4 is located on the center line of the narrow-side long axis of the rectangular waveguide 2, the middle of the narrow-side oblique radiation slot 4 is arranged to penetrate through the narrow side of the rectangular waveguide 2, and the end of the narrow-side oblique radiation slot 4 cuts into the wide side of the rectangular waveguide 2; one end of the narrow-side oblique radiation slit 4 is cut into one wide side of the rectangular waveguide 2, and the other end of the narrow-side oblique radiation slit 4 is cut into the other wide side of the rectangular waveguide 2.
The narrow-side oblique radiation slits 4 are arranged in a deflection manner along the normal direction of the narrow side of the rectangular waveguide 2, and two adjacent narrow-side oblique radiation slits 4 are arranged in a splayed structure; specifically, in the length direction of the narrow side of the rectangular waveguide 2, the oblique directions of the adjacent two narrow side oblique radiation slits 4 are different.
For example: on the narrow sides of the rectangular waveguide 2 and in the direction from the top end to the bottom end of the rectangular waveguide 2, the first ends of the odd-numbered narrow-side oblique radiation slits 4 extend toward the top end of the rectangular waveguide 2, and the second ends of the odd-numbered narrow-side oblique radiation slits 4 extend toward the bottom end of the rectangular waveguide 2; while the first ends of the even number of narrow-side oblique radiation slits 4 extend toward the bottom end direction of the rectangular waveguide 2, and the second ends of the even number of narrow-side oblique radiation slits 4 extend toward the top end direction of the rectangular waveguide 2; wherein, the first end of the odd number of narrow-side oblique radiation slits 4 or the first end of the even number of narrow-side oblique radiation slits 4 is one end of the narrow-side oblique radiation slits 4 close to one of the wide sides of the rectangular waveguide 2, and the second end of the odd number of narrow-side oblique radiation slits 4 or the second end of the even number of narrow-side oblique radiation slits 4 is one end of the narrow-side oblique radiation slits 4 close to the other wide side of the rectangular waveguide 2.
The end cutting depth Q n of the narrow-side oblique radiation slit 4 is changed and set in the direction from the top to the bottom of the rectangular waveguide 2; at different positions of the narrow side of the rectangular waveguide 2, the deflection angles a n of the narrow side oblique radiation slits 4 are different; n is the serial number of the narrow-side oblique radiation slits 4 arranged on a single narrow side in the rectangular waveguide 2, N is more than or equal to 1 and less than or equal to N, and N is the total number of the narrow-side oblique radiation slits 4 arranged on the single narrow side in the rectangular waveguide 2; as n increases, the values of the end cut depth Q n and the deflection angle a n of the narrow-side oblique radiation slit 4 generally show a tendency to become larger.
It should be noted that, the deflection angle a n is an included angle between the center line of the narrow-side oblique radiation slot 4 and the narrow-side normal direction of the rectangular waveguide 2; and the serial numbers n of the narrow-side oblique radiation slots 4 arranged on the single narrow side of the rectangular waveguide 2 are obtained by sequentially numbering the narrow-side oblique radiation slots 4 arranged on the single narrow side of the rectangular waveguide 2 according to the direction from the top end to the bottom end of the rectangular waveguide 2.
In this embodiment, 20 narrow-side oblique radiation slits 4 are uniformly disposed on a single narrow side of the rectangular waveguide 2, i.e., n=20; the width of each narrow-side oblique radiation slit 4 is 6.11mm, the slit distance between two adjacent narrow-side oblique radiation slits 4 is 85mm, and the cutting depth Q n and the deflection angle a n of the end parts of the narrow-side oblique radiation slits 4 are shown in the following table 2.
TABLE 2 end cut depth Q n and deflection angle a of narrow side oblique radiation slit 4 n
As shown in fig. 7, fig. 7 shows a graph of simulation results of reflection coefficients of the travelling wave waveguide slot array antenna according to the embodiment; as can be seen from fig. 7, the traveling wave waveguide slot array antenna according to the present embodiment can achieve a return loss better than 15 dB in the frequency range of 2.1 GHz-2.9 GHz.
As shown in fig. 8, fig. 8 shows a remote radiation pattern of the travelling wave waveguide slot array antenna according to the embodiment when the frequency is 2.45GHz and the observation angle phi=13°; as can be seen from fig. 8, the gain of the travelling wave waveguide slot array antenna is 6.2dBi, the beam tilt angle of the travelling wave waveguide slot array antenna is 34 °, and the 3dB beam width of the travelling wave waveguide slot array antenna is 38 °, so that the far field security of the travelling wave waveguide slot array antenna during operation can be ensured.
The manufacturing process comprises the following steps:
the specific method for manufacturing the traveling wave waveguide slot array antenna is as follows:
Firstly, a high-precision machining process is adopted according to the design requirement of the travelling wave waveguide slot array antenna, and the rectangular waveguide 2 is obtained through machining.
Then, a metal slot opening method is utilized to carry out surface slotting treatment on the rectangular waveguide 2, namely, a wide-side longitudinal radiation slot 3, a narrow-side oblique radiation slot 4 and a terminal open circuit 5 are processed on the rectangular waveguide 2.
And finally, arranging a waveguide flange plate 1 at the top end of the rectangular waveguide 2 to obtain the travelling wave waveguide slot array antenna.
The working principle and the using method are as follows:
when the travelling wave waveguide slot array antenna is used, firstly, an antenna placement groove is formed in a loess foundation to be treated, and the travelling wave waveguide slot array antenna is vertically placed in the antenna placement groove; then, connecting a microwave electromagnetic energy source with a waveguide flange plate 1 in the travelling wave waveguide slot array antenna; and then, starting the microwave electromagnetic energy source, and heating and sintering the loess foundation to be treated by utilizing electromagnetic energy radiated outwards by the travelling wave waveguide slot array antenna.
Specifically, the method comprises the following steps:
step 1, foundation treatment: a groove with length, width and depth of 0.2m multiplied by 0.1m multiplied by 1.5m is excavated on the loess foundation to be treated and is used as an antenna placement groove; and then vertically placing the travelling wave waveguide slot array antenna in the antenna placing groove.
Step 2, connecting a microwave electromagnetic energy source: connecting the output ends of the microwave electromagnetic energy sources by using the feed coaxial lines, and extending the feed coaxial lines into the top end of the rectangular waveguide 2; wherein the microwave electromagnetic energy source and the waveguide flange plate 1 are connected together by bolts.
Step 3, setting a microwave electromagnetic energy source: setting the working frequency and power of the microwave electromagnetic energy source.
Step4, safety measures: wave absorbing materials are paved around the travelling wave waveguide slot array antenna to reduce backward radiation of electromagnetic waves, and the front end of a microwave electromagnetic energy source is connected with a circulator and a cooling facility.
Step 5, temperature detection equipment is installed: inserting temperature detection equipment into soil body of loess foundation to be treated around travelling wave waveguide slot array antenna; wherein, the depth of the temperature detection equipment inserted into the soil body of the loess foundation to be treated is 0.5m.
Step 6, heat strengthening treatment: and starting a microwave electromagnetic energy source, and closing the microwave electromagnetic energy source until the temperature data returned by the temperature detection equipment reach the preset sintering effective temperature.
Step 7, foundation bearing detection: and carrying out bearing detection on the loess foundation after the heat reinforcement treatment, and observing whether the foundation settlement is qualified or not.
In the design of the traveling wave waveguide slot array antenna according to the embodiment, according to the actual measurement result of the electromagnetic parameters of the loess foundation to be treated, the structural size of the rectangular waveguide 2 and the structural sizes of the broadside longitudinal radiation slot 3 and the narrow side oblique radiation slot 4 formed on the rectangular waveguide 2 are calculated in a simulation mode, so that the traveling wave waveguide slot array antenna can realize omnidirectional and efficient radiation electromagnetic energy in the soil body of the loess foundation to be treated, the loess foundation is subjected to heat strengthening treatment by utilizing the microwave heating principle, and a loess foundation heat strengthening model is established by adopting multi-physical-field simulation software, so that the effectiveness of the loess foundation heat strengthening model is proved.
In this embodiment, the microwave heating principle of the travelling wave waveguide slot array antenna specifically includes: in a microscopic state, the arrangement of polar molecules in the solid medium in the electromagnetic field deflects according to the direction of the electric field; in a high-frequency electromagnetic field with the frequency being more than 1GHz, the direction of the electromagnetic field swings for hundreds of millions of times per second, polar molecules in the solid medium can be rearranged along with the direction of the electromagnetic field, the interaction among the original molecules is overcome, a large amount of internal energy is generated, at the moment, heat is bidirectionally transmitted between the outside and the inside of the solid medium, and the uniform temperature rise of the whole solid medium is realized; under the macroscopic state, the electromagnetic wave is lost in the solid medium, the electromagnetic energy is converted into heat energy, and the loess foundation heated by microwaves is firmer and has better bearing effect.
In the embodiment, a high-precision machining and numerical control metal slot opening method is adopted, so that the travelling wave waveguide slot array antenna with the advantages of full metal antenna electromagnetic performance, stable structure, simple connection, high radiation efficiency and large power capacity is obtained; specifically, a wide-side longitudinal radiation slot 3 is arranged on the wide side of the rectangular waveguide 2, and a narrow-side oblique radiation slot 4 is arranged on the narrow side of the rectangular waveguide 2; the wide-side longitudinal radiation slit 3 and the narrow-side oblique radiation slit 4 are utilized to cut the surface current radiation of the rectangular waveguide 2, and the uniform distribution of power at each radiation slit can be realized by adjusting the deviation distance of the wide-side longitudinal radiation slit 3 and the deviation angle of the narrow-side oblique radiation slit 4; secondly, the bottom end opening of the rectangular waveguide 2 is formed into an open-ended structure 5, namely, the terminal of the rectangular waveguide 2 is cut into an open structure, so that space radiation at the bottom of the antenna is ensured, the broadband of the antenna is improved, and the stability and universality of the antenna in the actual loess foundation are improved; the space and the size of the radiation gaps are adjusted, so that the maximum radiation direction faces the ground, and the safety in actual use is improved.
In the embodiment, the rectangular waveguide 2 is adopted as an antenna substrate, so that the power capacity of the antenna is improved, and the antenna has higher radiation efficiency by combining all-metal electromagnetic performance; secondly, based on the traveling wave mode of the open-ended circuit 5, the impedance bandwidth of the antenna is improved, and the stability and the adaptability of the antenna are improved; the uniform distribution of power is realized by optimizing the sizes and the layout of the wide-side longitudinal radiation slits 3 and the narrow-side oblique radiation slits 4, and the reinforcement depth of the loess foundation is ensured; in addition, the wide-side longitudinal radiation slit 3 and the narrow-side oblique radiation slit 4 in the embodiment have low sensitivity to the process and working environment, and the antenna has stable structure and high strength and can be well adapted to the actual engineering environment.
According to the travelling wave waveguide slot array antenna and the application method thereof, a microwave energy source is fixedly connected with a rectangular waveguide 2 by utilizing a waveguide flange plate 1; the electromagnetic wave in TE 10 modes is transmitted by utilizing a rectangular waveguide 2, a wide-side longitudinal radiation slot 3 and a narrow-side oblique radiation slot 4 which are arranged on the rectangular waveguide 2 form a waveguide slot array, and the effect of radiating electromagnetic energy is realized by exciting the waveguide slot array; secondly, setting the bottom end of the rectangular waveguide 2 as a terminal open circuit 5, realizing that the terminal is matched and absorbs electromagnetic energy, and radiating a directional diagram with the maximum radiation direction facing the ground in the far field of the antenna; the antenna has the advantages of high caliber efficiency, easy control of the distribution of the oral-facial fields, large power capacity and the like, and is suitable for microwave heating of the consumed loess medium; meanwhile, the traveling wave waveguide slot array antenna has stable performance, high strength and convenient installation, and is suitable for actual engineering operation environments.
In the invention, the waveguide slot array is arranged on the periphery of the rectangular waveguide 2, and the waveguide slot array is utilized to radiate the input electromagnetic energy to the space around the antenna; the design structure of the open-ended circuit 5 is adopted, so that the input electromagnetic energy is radiated to the bottom space of the antenna, the radiated electromagnetic energy can be converted into heat energy in the loess foundation to be treated, the loading capacity of the loess foundation is improved, and the collapsibility of the loess foundation is eliminated; by adjusting the sizes and the layout of the wide-side longitudinal radiation slits 3 and the narrow-side oblique radiation slits 4 in the waveguide slit array, the uniform distribution of power in the design length of the antenna is realized, and the effective range of foundation reinforcement is ensured; according to the invention, the size of the longitudinal radiation slot 3 with the wide wave edge and the size of the oblique radiation slot 4 with the narrow wave edge are changed, so that the directional diagram of the antenna can be optimized, the maximum radiation direction of the antenna points to the ground, the backward radiation is reduced, and the possible safety problem of the antenna to surrounding personnel and the environment when working under high power is reduced; the antenna substrate is obtained by machining and manufacturing processes, and the antenna with the all-metal structure ensures that the antenna has higher power capacity and radiation efficiency.
The above embodiment is only one of the implementation manners capable of implementing the technical solution of the present invention, and the scope of the claimed invention is not limited to the embodiment, but also includes any changes, substitutions and other implementation manners easily recognized by those skilled in the art within the technical scope of the present invention.
Claims (10)
1. The travelling wave waveguide slot array antenna is characterized by comprising a rectangular waveguide (2); the top end of the rectangular waveguide (2) is used for being connected with a microwave electromagnetic energy source, and the bottom end of the rectangular waveguide (2) is open;
The rectangular waveguide (2) is used for transmitting TE 10 mode electromagnetic waves;
A plurality of broadside longitudinal radiation slits (3) are formed in the broadsides of the rectangular waveguide (2), and the broadside longitudinal radiation slits (3) are uniformly distributed along the length direction of the broadsides of the rectangular waveguide (2);
A plurality of narrow-side oblique radiation slits (4) are formed in the narrow side of the rectangular waveguide (2), and the narrow-side oblique radiation slits (4) are uniformly distributed along the length direction of the narrow side of the rectangular waveguide (2).
2. The traveling wave waveguide slot array antenna according to claim 1, characterized in that the long axis direction of the broadside longitudinal radiation slot (3) is parallel to the broadside long axis center line of the rectangular waveguide (2); wherein, in the direction from the top to the bottom of the rectangular waveguide (2), the length of the broadside longitudinal radiation slit (3) is changed.
3. The traveling wave waveguide slot array antenna according to claim 1, characterized in that a plurality of the broadside longitudinal radiating slots (3) are arranged offset from the broadside long axis center line of the rectangular waveguide (2), and two adjacent broadside longitudinal radiating slots (3) are positioned on two sides of the broadside long axis center line of the rectangular waveguide (2).
4. A travelling wave waveguide slot array antenna according to claim 3, characterized in that the offset distance of the broadside longitudinal radiating slot (3) from the broadside long axis centre line of the rectangular waveguide (2) is arranged to vary in the direction from the top to the bottom of the rectangular waveguide (2).
5. Travelling wave waveguide slot array antenna according to claim 1, characterized in that the centre of the narrow side diagonal radiating slot (4) is located on the narrow side long axis centre line of the rectangular waveguide (2);
the middle part of the narrow-side inclined radiation slit (4) penetrates through the narrow side of the rectangular waveguide (2), and the end part of the narrow-side inclined radiation slit (4) cuts into the wide side of the rectangular waveguide (2);
The end cutting depth of the narrow-side oblique radiation slit (4) is changed in the direction from the top end to the bottom end of the rectangular waveguide (2).
6. The traveling wave waveguide slot array antenna according to claim 1, characterized in that the narrow-side oblique radiation slots (4) are arranged in a deflection manner along the narrow-side normal direction of the rectangular waveguide (2); wherein, at different positions of the narrow side of the rectangular waveguide (2), the deflection angles of the narrow side oblique radiation slits (4) are different.
7. Travelling wave waveguide slot array antenna according to claim 6, characterized in that two adjacent narrow side diagonal radiating slots (4) are arranged in a splayed configuration.
8. A travelling wave waveguide slot array antenna according to claim 1, further comprising a waveguide flange (1); the waveguide flange plate (1) is arranged at the top end of the rectangular waveguide (2), one side of the waveguide flange plate (1) is connected with the top end of the rectangular waveguide (2), and the other side of the waveguide flange plate (1) is used for being connected with a microwave electromagnetic energy source.
9. The travelling wave waveguide slot array antenna according to claim 8, characterized in that the waveguide flange (1) is a BJ-26 standard rectangular waveguide flange.
10. A method of using a travelling wave waveguide slot array antenna as claimed in any one of claims 1 to 9, wherein the method is used in a loess foundation thermal consolidation process;
The application method of the travelling wave waveguide slot array antenna comprises the following steps:
An antenna placement groove is formed in a loess foundation to be treated, and the travelling wave waveguide slot array antenna is vertically placed in the antenna placement groove;
connecting a microwave electromagnetic energy source with the top end of a rectangular waveguide (2) in the travelling wave waveguide slot array antenna;
And starting a microwave electromagnetic energy source, and heating and sintering the loess foundation to be treated by utilizing electromagnetic energy radiated outwards by the travelling wave waveguide slot array antenna.
Priority Applications (1)
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6972727B1 (en) * | 2003-06-10 | 2005-12-06 | Rockwell Collins | One-dimensional and two-dimensional electronically scanned slotted waveguide antennas using tunable band gap surfaces |
| JP2006121376A (en) * | 2004-10-21 | 2006-05-11 | Japan Radio Co Ltd | Slot array antenna |
| JP2007059959A (en) * | 2005-08-22 | 2007-03-08 | Japan Radio Co Ltd | Combined antenna |
| JP2008113306A (en) * | 2006-10-31 | 2008-05-15 | Japan Radio Co Ltd | Slot antenna |
| CN101710651A (en) * | 2009-12-25 | 2010-05-19 | 中国电子科技集团公司第三十八研究所 | Flat plane antenna applicable to mobile satellite communication terminal |
| US20120038530A1 (en) * | 2010-08-10 | 2012-02-16 | Victory Microwave Corporation | Dual Polarized Waveguide Slot Array and Antenna |
| CN202374485U (en) * | 2011-12-20 | 2012-08-08 | 湖南省中晟热能科技有限公司 | Slot antenna for microwave furnace |
| CN103682650A (en) * | 2013-10-17 | 2014-03-26 | 西安空间无线电技术研究所 | Slotted waveguide antenna with high cross polarization |
| WO2017132756A1 (en) * | 2016-02-05 | 2017-08-10 | Acceleware Ltd. | Traveling wave antenna for electromagnetic heating |
| CN211019303U (en) * | 2019-12-23 | 2020-07-14 | 湖南微朗科技有限公司 | Microwave feed-in structure |
| CN113285215A (en) * | 2021-05-20 | 2021-08-20 | 中国电子科技集团公司第十四研究所 | Broadband dual-polarization waveguide slot antenna |
| CN214153195U (en) * | 2020-12-06 | 2021-09-07 | 西安电子工程研究所 | Waveguide narrow-edge frequency-scanning antenna for widening frequency-scanning angle range of traveling wave array and array antenna |
| CN114256587A (en) * | 2021-12-20 | 2022-03-29 | 中国电子科技集团公司第十四研究所 | Method for manufacturing heterodromous multi-cavity slot waveguide through combination and splitting |
-
2024
- 2024-04-08 CN CN202410414359.7A patent/CN118017237A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6972727B1 (en) * | 2003-06-10 | 2005-12-06 | Rockwell Collins | One-dimensional and two-dimensional electronically scanned slotted waveguide antennas using tunable band gap surfaces |
| JP2006121376A (en) * | 2004-10-21 | 2006-05-11 | Japan Radio Co Ltd | Slot array antenna |
| JP2007059959A (en) * | 2005-08-22 | 2007-03-08 | Japan Radio Co Ltd | Combined antenna |
| JP2008113306A (en) * | 2006-10-31 | 2008-05-15 | Japan Radio Co Ltd | Slot antenna |
| CN101710651A (en) * | 2009-12-25 | 2010-05-19 | 中国电子科技集团公司第三十八研究所 | Flat plane antenna applicable to mobile satellite communication terminal |
| US20120038530A1 (en) * | 2010-08-10 | 2012-02-16 | Victory Microwave Corporation | Dual Polarized Waveguide Slot Array and Antenna |
| CN202374485U (en) * | 2011-12-20 | 2012-08-08 | 湖南省中晟热能科技有限公司 | Slot antenna for microwave furnace |
| CN103682650A (en) * | 2013-10-17 | 2014-03-26 | 西安空间无线电技术研究所 | Slotted waveguide antenna with high cross polarization |
| WO2017132756A1 (en) * | 2016-02-05 | 2017-08-10 | Acceleware Ltd. | Traveling wave antenna for electromagnetic heating |
| CN211019303U (en) * | 2019-12-23 | 2020-07-14 | 湖南微朗科技有限公司 | Microwave feed-in structure |
| CN214153195U (en) * | 2020-12-06 | 2021-09-07 | 西安电子工程研究所 | Waveguide narrow-edge frequency-scanning antenna for widening frequency-scanning angle range of traveling wave array and array antenna |
| CN113285215A (en) * | 2021-05-20 | 2021-08-20 | 中国电子科技集团公司第十四研究所 | Broadband dual-polarization waveguide slot antenna |
| CN114256587A (en) * | 2021-12-20 | 2022-03-29 | 中国电子科技集团公司第十四研究所 | Method for manufacturing heterodromous multi-cavity slot waveguide through combination and splitting |
Non-Patent Citations (1)
| Title |
|---|
| 王莉莉;李迎松;杨晓冬;杨祁;: "Ku波段波导混合缝隙阵列全向天线的设计与实现", 应用科技, no. 03, 15 March 2010 (2010-03-15), pages 30 - 32 * |
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