CN211238515U - Antenna array and antenna - Google Patents
Antenna array and antenna Download PDFInfo
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- CN211238515U CN211238515U CN201922301270.7U CN201922301270U CN211238515U CN 211238515 U CN211238515 U CN 211238515U CN 201922301270 U CN201922301270 U CN 201922301270U CN 211238515 U CN211238515 U CN 211238515U
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Abstract
The present application relates to an antenna array and an antenna; the antenna array comprises a first type antenna element, a second type antenna element, a third type antenna element and a fourth type antenna element; the second type of antenna oscillator is distributed on an X axis and a Y axis of the first coordinate system, and the distance between the second type of antenna oscillator and the first type of antenna oscillator is 0.7-0.8 times of wavelength; the third type of antenna oscillator is distributed on the X axis and the Y axis of the second coordinate system, and the distance between the third type of antenna oscillator and the first type of antenna oscillator is 1.7 times of wavelength to 1.8 times of wavelength; the fourth antenna elements are distributed on the X axis and the Y axis of the first coordinate system, and the distance between the second antenna elements and the fourth antenna elements is 0.7-0.8 wavelength, so that the side lobe level of the antenna array is reduced, the level value outside the angle of 3dB is rapidly reduced, the side lobe level is below-10 dB, the main lobe flatness is good, the level value in a wider angle range is high in consistency, and the signal collection intensity is guaranteed to be consistent.
Description
Technical Field
The present application relates to the field of antenna technology, and in particular, to an antenna array and an antenna.
Background
An antenna is a converter that converts a guided wave propagating on a transmission line into an electromagnetic wave propagating on an unbounded medium or converts an electromagnetic wave propagating on an unbounded medium into a guided wave propagating on a transmission line. The relationship between the absolute value of the antenna array output and the incoming wave direction becomes the directional diagram of the antenna, wherein the directional diagram with the main lobe width of the horizontal plane and the vertical plane being about 35 degrees is called as a rectangular beam, the rectangular beam is generally emitted by the antenna array consisting of four antenna elements arranged side by side, however, the side lobe level of the traditional rectangular beam antenna is high, the edge of the main lobe level is slowly reduced, and the level value cannot be flat within 3dB (decibel) of the beam width, therefore, in the implementation process, the inventor finds that at least the following problems exist in the traditional technology: the performance of the traditional rectangular wave beam is poor, and higher use requirements cannot be met.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide an antenna array and an antenna for solving the problem that the conventional rectangular beam has poor performance and cannot meet higher use requirements.
In order to achieve the above object, in one aspect, an embodiment of the present application provides an antenna array, including a first type antenna element, a second type antenna element, a third type antenna element, and a fourth type antenna element; the first type of antenna element comprises an antenna element;
the second type of antenna element comprises four antenna elements which are respectively distributed in the positive direction of an X axis, the negative direction of the X axis, the positive direction of a Y axis and the negative direction of the Y axis of the first coordinate system, and the distance between the four antenna elements and the first type of antenna element is 0.7-0.8 times of wavelength; the first coordinate system is a coordinate system established by taking the center of the first type antenna element as an origin;
the third type of antenna element comprises four antenna elements which are respectively distributed in the positive direction of the X axis, the negative direction of the X axis, the positive direction of the Y axis and the negative direction of the Y axis of the second coordinate system, and the distance between the four antenna elements and the first type of antenna element is 1.7 times of wavelength to 1.8 times of wavelength; the second coordinate system is a coordinate system which is established by taking the center of the first type of antenna oscillator as an origin and is positioned on the same plane as the first coordinate system, and an included angle between an X axis of the second coordinate system and an X axis of the first coordinate system is 45 degrees;
the fourth antenna element comprises four antenna elements which are respectively distributed in the positive direction of the X axis, the negative direction of the X axis, the positive direction of the Y axis and the negative direction of the Y axis of the first coordinate system, and the distance between the second antenna element distributed in the positive direction of the X axis of the first coordinate system and the fourth antenna element is 0.7-0.8 wavelength; the distance between the second type of antenna element and the fourth type of antenna element distributed in the X-axis negative direction of the first coordinate system is 0.7-0.8 times of wavelength; the distance between the second type antenna element and the fourth type antenna element distributed in the positive direction of the Y axis of the first coordinate system is 0.7-0.8 times of wavelength; the distance between the second type of antenna element and the fourth type of antenna element distributed in the Y-axis negative direction of the first coordinate system is 0.7-0.8 times of wavelength; in each direction, the second type antenna element is arranged between the first type antenna element and the fourth type antenna element;
the phases of the first type antenna element, the second type antenna element and the third type antenna element are the same; the phases of the first type antenna element and the fourth type antenna element are opposite;
the power weighting ratio of the first type antenna element, the second type antenna element, the third type antenna element and the fourth type antenna element is 28:4:1: 1.
In one embodiment, the second type of antenna element comprises four antenna elements that are equidistant from the first type of antenna element.
In one embodiment, the third type of antenna element comprises four antenna elements that are equidistant from the first type of antenna element.
In one embodiment, the distance between the second type of antenna elements and the fourth type of antenna elements distributed in the positive direction of the X axis of the first coordinate system is a first distance; the distance between the second type of antenna element and the fourth type of antenna element distributed in the X-axis negative direction of the first coordinate system is a second distance; the distance between the second type of antenna element and the fourth type of antenna element distributed in the positive direction of the Y axis of the first coordinate system is a third distance; the distance between the second type of antenna element and the fourth type of antenna element distributed in the Y-axis negative direction of the first coordinate system is a fourth distance; and the first distance, the second distance, the third distance and the fourth distance are equal.
In one embodiment, the distance between the first type of antenna element and the second type of antenna element is 0.7 times wavelength; the distance between the first type antenna element and the third type antenna element is 1.7 times of wavelength; the first distance, the second distance, the third distance and the fourth distance are all equal to 0.7 times the wavelength.
In one embodiment, the first type antenna element, the second type antenna element, the third type antenna element and the fourth type antenna element are dual-polarized antenna elements.
On the other hand, the embodiment of the application also provides an antenna, which comprises the antenna array, a reflecting plate and a power dividing network;
the antenna array is arranged on one surface of the reflecting plate; the power distribution network is arranged on the other surface of the reflecting plate; the antenna array is connected with the power distribution network through a coaxial cable.
One of the above technical solutions has the following advantages and beneficial effects:
the antenna array provided by the embodiments of the present application includes: the antenna comprises a first type antenna oscillator, a second type antenna oscillator, a third type antenna oscillator and a fourth type antenna oscillator, wherein the phases of the first type antenna oscillator, the second type antenna oscillator and the third type antenna oscillator are the same; the phases of the first type antenna element and the fourth type antenna element are opposite; the power weighting proportion of the first type antenna element, the second type antenna element, the third type antenna element and the fourth type antenna element is 28:4:1:1, and the first type antenna element, the second type antenna element, the third type antenna element and the fourth type antenna element are set according to the following modes: the second type of antenna oscillator is distributed on an X axis and a Y axis of the first coordinate system, and the distance between the second type of antenna oscillator and the first type of antenna oscillator is 0.7-0.8 times of wavelength; the third type of antenna oscillator is distributed on the X axis and the Y axis of the second coordinate system, and the distance between the third type of antenna oscillator and the first type of antenna oscillator is 1.7 times of wavelength to 1.8 times of wavelength; the fourth antenna elements are distributed on the X axis and the Y axis of the first coordinate system, the second antenna elements and the fourth antenna elements are distributed on the positive direction of the X axis of the first coordinate system, the second antenna elements and the fourth antenna elements are distributed on the negative direction of the X axis of the first coordinate system, the second antenna elements and the fourth antenna elements are distributed on the positive direction of the Y axis of the first coordinate system, and the distances between the second antenna elements and the fourth antenna elements distributed on the negative direction of the Y axis of the first coordinate system are all 0.7-0.8 times of wavelength, so that the sidelobe level of the antenna array is reduced, the level value outside the angle of 3dB is rapidly reduced, so that the side lobe level is below-10 dB, the main lobe flatness is good, the level value consistency in a wider angle range is high, the signal collection intensity is ensured to be consistent, and in addition, the interference and crosstalk to other base station signals are reduced.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular description of preferred embodiments of the application, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the subject matter of the present application.
Fig. 1 is a schematic diagram of an antenna array according to an embodiment;
FIG. 2 is a test chart of antenna patterns;
fig. 3 is a flatness test chart of the main lobe of the antenna.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The term "mounted" and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In order to solve the problems that the performance of a conventional rectangular beam is poor and higher use requirements cannot be met, as shown in fig. 1, an antenna array is provided (it is to be noted that the provided antenna array is formed by arranging and combining a plurality of antenna elements, is divided into four types of antenna elements by taking power and phases obtained through a power division network as distinction), and comprises a first type of antenna element, a second type of antenna element, a third type of antenna element and a fourth type of antenna element; the first type of antenna element comprises an antenna element;
the second type of antenna element comprises four antenna elements which are respectively distributed in the positive direction of an X axis, the negative direction of the X axis, the positive direction of a Y axis and the negative direction of the Y axis of the first coordinate system, and the distance between the four antenna elements and the first type of antenna element is 0.7-0.8 times of wavelength; the first coordinate system is a coordinate system established by taking the center of the first type antenna element as an origin;
the third type of antenna element comprises four antenna elements which are respectively distributed in the positive direction of the X axis, the negative direction of the X axis, the positive direction of the Y axis and the negative direction of the Y axis of the second coordinate system, and the distance between the four antenna elements and the first type of antenna element is 1.7 times of wavelength to 1.8 times of wavelength; the second coordinate system is a coordinate system which is established by taking the center of the first type of antenna oscillator as an origin and is positioned on the same plane as the first coordinate system, and an included angle between an X axis of the second coordinate system and an X axis of the first coordinate system is 45 degrees; specifically, an included angle between the positive direction of the X axis of the second coordinate system and the positive direction of the X axis of the first coordinate system may be 45 degrees;
the fourth antenna oscillator comprises four antenna oscillators which are respectively distributed in the positive direction of the X axis, the negative direction of the X axis, the positive direction of the Y axis and the negative direction of the Y axis of the first coordinate system, and the distance between the second antenna oscillator and the fourth antenna oscillator which are distributed on the positive direction of the X axis and the Y axis of the first coordinate system is 0.7-0.8 wavelength; the distance between the second type of antenna element and the fourth type of antenna element distributed in the X-axis negative direction of the first coordinate system is 0.7-0.8 times of wavelength; the distance between the second type antenna element and the fourth type antenna element distributed in the positive direction of the Y axis of the first coordinate system is 0.7-0.8 times of wavelength; the distance between the second type of antenna element and the fourth type of antenna element distributed in the Y-axis negative direction of the first coordinate system is 0.7-0.8 times of wavelength; in each direction, the second type antenna elements are distributed between the first type antenna elements and the fourth type antenna elements;
the phases of the first type antenna element, the second type antenna element and the third type antenna element are the same; the phases of the first type antenna element and the fourth type antenna element are opposite;
the power weighting ratio of the first type antenna element, the second type antenna element, the third type antenna element and the fourth type antenna element is 28:4:1: 1.
The antenna element is a component having a function of guiding and amplifying an electromagnetic wave in the antenna. The antenna array comprises a first type antenna element, a second type antenna element, a third type antenna element and a fourth type antenna element.
The first type of antenna element comprises an antenna element positioned in the middle of the antenna array and used as a reference element of the antenna array, and the obtained power is maximum. In one example, the first type of antenna element is a dual polarized antenna element.
The second type of antenna element is used for improving the integral gain of the antenna, thereby improving the roll-off degree of a directional diagram, reducing a side lobe level value, and forming the directional diagram of the first type of antenna element, and the requirement that the roll-off degree of 3dB to 20dB is within 25 degrees is met.
The phase of the second-type antenna is the same as that of the first-type antenna oscillator, the power acquired by the second-type antenna oscillator through the power division network is smaller than that acquired by the first-type antenna oscillator through the power division network, and specifically, the power weighting ratio of the first-type antenna oscillator to the second-type antenna oscillator is 28: 4. In one example, the second type of antenna element is a dual polarized antenna element. The power weighting ratio refers to a ratio of powers obtained by various antenna elements through a power division network.
The second type of antenna elements are distributed on the X-axis and Y-axis of the first coordinate system (X-axis as shown in FIG. 1)1Y1A coordinate system). Specifically, the second type of antenna element comprises four antenna elements which are respectively distributed in the positive direction of the X axis, the negative direction of the X axis, the positive direction of the Y axis and the negative direction of the Y axis of the first coordinate system, and are arranged at intervals with the first type of antenna elements, the interval distance is 0.7 times of wavelength to 0.8 times of wavelength, wherein the interval distance is the distance between the centers of the two antenna elements, and the wavelength is the wavelength of the working frequency of the center of the antenna. In order to improve the coupling effect between the second-type antenna element and the first-type antenna element and obtain a directional diagram with good performance, in one example, the distances between the four antenna elements included in the second-type antenna element and the first-type antenna element are all equal. In order to further improve the coupling effect between the second type antenna element and the first type antenna element and obtain a directional diagram with better performance, in one example, the distance between the first type antenna element and the second type antenna element is 0.7 times of the wavelength.
The third type of antenna element is used for shaping a directional diagram formed by the first type of antenna element and the second type of antenna element, is responsible for zero point filling of the directional diagram, and can also improve the gain and the roll-off degree of the antenna.
The phase of the third type antenna is the same as that of the first type antenna element, the power acquired by the third type antenna element is smaller than that acquired by the first type antenna element, and specifically, the power weighting ratio of the first type antenna element to the third type antenna element is 28: 1. In one example, the third type of antenna element is a dual polarized antenna element.
The third type of antenna elements are distributed on the X-axis and the Y-axis of the second coordinate system (X-axis as shown in FIG. 1)2Y2A coordinate system). Specifically, the third type of antenna element comprises four antenna elements which are respectively distributed in the positive direction of the X axis, the negative direction of the X axis, the positive direction of the Y axis and the negative direction of the Y axis of the second coordinate system, and are arranged at intervals with the first type of antenna elements, and the interval distance is 1.7 times of wavelength to 1.8 times of wavelength. In order to improve the coupling effect of the third type antenna element on the first type antenna element and the second type antenna element and obtain a directional diagram with good performance, in one example, the distances between four antenna elements included in the third type antenna element and the first type antenna element are all equal. In order to further improve the coupling effect of the third type antenna element on the first type antenna element and the second type antenna element and obtain a pattern with better performance, in one example, the distance between the first type antenna element and the second type antenna element is 1.7 times of the wavelength.
The fourth type of antenna element is positioned at the edge of the antenna array, an electric vector directional diagram formed by the fourth type of antenna element is positioned right above the antenna and directly offset with directional diagrams formed by the first type of antenna element, the second type of antenna element and the third type of antenna element, so that the main lobe of the antenna directional diagram becomes flat, the 3dB width cannot become very narrow, and the roll-off degree of the antenna is ensured.
The phases of the fourth antenna element and the first antenna element are opposite, the power acquired by the third antenna element is smaller than that acquired by the first antenna element, and specifically, the power weighting ratio of the first antenna element to the fourth antenna element is 28: 1. In one example, the fourth type of antenna element is a dual polarized antenna element.
The fourth type of antenna elements are distributed on the X-axis and the Y-axis of the first coordinate system. Specifically, the fourth type of antenna element comprises four antenna elements which are respectively distributed in the positive direction of the X axis, the negative direction of the X axis, the positive direction of the Y axis and the negative direction of the Y axis of the first coordinate system, and are arranged at intervals with the second type of antenna elements, and the interval distance is 0.7 times of wavelength to 0.8 times of wavelength.
In order to improve the coupling effect of the fourth antenna element to the first antenna element, the second antenna element and the third antenna element and obtain a directional diagram with good performance, in one example, the distances between the second antenna element and the fourth antenna element distributed in the positive direction of the X axis of the first coordinate system, between the second antenna element and the fourth antenna element distributed in the negative direction of the X axis of the first coordinate system, between the second antenna element and the fourth antenna element distributed in the positive direction of the Y axis of the first coordinate system and between the second antenna element and the fourth antenna element distributed in the negative direction of the Y axis of the first coordinate system are equal.
In order to further improve the coupling effect of the fourth type antenna element to the first type antenna element, the second type antenna element and the third type antenna element and obtain a directional diagram with better performance, in one example, the distances between the second type antenna element and the fourth type antenna element distributed on the positive direction of the X axis of the first coordinate system, between the second type antenna element and the fourth type antenna element distributed on the negative direction of the X axis of the first coordinate system, between the second type antenna element and the fourth type antenna element distributed on the positive direction of the Y axis of the first coordinate system and between the second type antenna element and the fourth type antenna element distributed on the negative direction of the Y axis of the first coordinate system are 0.7 times of wavelength.
According to the embodiments of the antenna array, the side lobe level of the antenna array can be reduced, the level value outside the angle of 3dB is rapidly reduced, the side lobe level is below-10 dB, the flatness of the main lobe is good, the level value in a wide angle range is high in consistency, the signal collection strength is guaranteed to be consistent, and in addition, the interference and crosstalk to other base station signals are reduced.
In one embodiment, an antenna array includes a first type of dual-polarized antenna element, a second type of dual-polarized antenna element, a third type of dual-polarized antenna element, and a fourth type of dual-polarized antenna element; the first type of dual-polarized antenna element comprises a dual-polarized antenna element; the second type of dual-polarized antenna element comprises four dual-polarized antenna elements; the third type of dual-polarized antenna element comprises four dual-polarized antenna elements; the fourth type of dual-polarized antenna element comprises four dual-polarized antenna elements;
the second type of dual-polarized antenna elements are distributed in the positive X-axis direction, the negative X-axis direction, the positive Y-axis direction and the negative Y-axis direction of the first coordinate system, and the distance between the second type of dual-polarized antenna elements and the first type of dual-polarized antenna elements is 0.7 times of wavelength; the first coordinate system is a coordinate system established by taking the center of the first-class dual-polarized antenna element as an origin;
the third type of dual-polarized antenna elements are distributed in the positive X-axis direction, the negative X-axis direction, the positive Y-axis direction and the negative Y-axis direction of the second coordinate system, and the distance between the third type of dual-polarized antenna elements and the first type of dual-polarized antenna elements is 1.7 times of wavelength; the second coordinate system is a coordinate system established by taking the center of the first-class dual-polarized antenna element as an origin, and an included angle between the positive direction of an X axis of the second coordinate system and the positive direction of the X axis of the first coordinate system is 45 degrees;
the fourth type of dual-polarized antenna elements are distributed in the positive X-axis direction, the negative X-axis direction, the positive Y-axis direction and the negative Y-axis direction of the first coordinate system, and the distance between the second type of dual-polarized antenna elements distributed in the positive X-axis direction of the first coordinate system and the fourth type of dual-polarized antenna elements is 0.7 times of wavelength; the distance between the second-type dual-polarized antenna element and the fourth-type dual-polarized antenna element distributed in the X-axis negative direction of the first coordinate system is 0.7 times of wavelength; the distance between the second-type dual-polarized antenna element and the fourth-type dual-polarized antenna element distributed in the positive direction of the Y axis of the first coordinate system is 0.7 times of wavelength; the distance between the second-type dual-polarized antenna element and the fourth-type dual-polarized antenna element distributed in the Y-axis negative direction of the first coordinate system is 0.7 times of wavelength; in each direction, the second-type dual-polarized antenna elements are distributed between the first-type dual-polarized antenna elements and the fourth-type dual-polarized antenna elements;
the phases of the first-type dual-polarized antenna element, the second-type dual-polarized antenna element and the third-type dual-polarized antenna element are the same; the phases of the first-type dual-polarized antenna element and the fourth-type dual-polarized antenna element are opposite;
the power weighting ratio of the first-type dual-polarized antenna element, the second-type dual-polarized antenna element, the third-type dual-polarized antenna element and the fourth-type dual-polarized antenna element is 28:4:1: 1.
Through tests, as shown in fig. 2, the directional diagram finally formed by the antenna array in this embodiment has a frequency point of 1710Mhz (megahertz), a main lobe width of 51 degrees, and a gain of approximately 10dB, and as can be seen from this diagram, the angle from 3dB to 20dB, and the angle through the angle is 24 degrees, it is described that a level value rapidly decreases beyond the 3dB, for an actual usage scenario, a practical angle is mostly within 3dB, and angles other than 3dB easily cause unnecessary interference to signals of other base stations, so a roll-off degree of the antenna array meets a usage requirement, and a side lobe level value of the antenna array is-10 dB, so a side lobe suppression ratio of the antenna array is more than 20 dB.
As shown in fig. 3, the flatness of the main lobe of the antenna array in this embodiment is shown, in this figure, it can be seen that, in the case of the highest gain of 12.1dB, the angular variation of the gain from 12dB to 12.1dB is 12.8 degrees within the range of-0.1 dB allowed, and it can be considered that there is almost no great variation in the gain in the angle of 12.8 degrees, so the directional pattern formed by this array satisfies the characteristics of low side lobe, fast level roll-off at 3dB, flat main lobe, and the like.
The antenna array has the advantages that the side lobe level is low, the requirement of roll-off degree is met, the level in the 3dB main lobe width is almost flat, the performance is excellent, and the higher using requirement is met.
In an embodiment, an antenna is further provided, which includes the antenna array, a reflector plate, and a power dividing network;
the antenna array is arranged on one surface of the reflecting plate; the power distribution network is arranged on the other surface of the reflecting plate; the antenna array is connected with the power distribution network through a coaxial cable. The antenna array can be installed on the front surface of the reflecting plate, and the power sharing network is installed on the back surface of the reflecting plate, which is not limited herein; the power distribution network is a double-sided copper-clad high-frequency PCB.
It should be noted that the antenna array in this embodiment is the same as the antenna array described in the embodiments of the antenna array of the present application, and for the specific description, reference is made to the description of the embodiments of the antenna array of the present application, and no further description is given here.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. An antenna array is characterized by comprising a first type antenna element, a second type antenna element, a third type antenna element and a fourth type antenna element; the first type of antenna element comprises an antenna element;
the second-class antenna oscillators comprise four antenna oscillators which are respectively distributed in the positive direction of an X axis, the negative direction of the X axis, the positive direction of a Y axis and the negative direction of the Y axis of the first coordinate system, and the distance between each second-class antenna oscillator and the first-class antenna oscillator is 0.7-0.8 wavelength; the first coordinate system is a coordinate system established by taking the center of the first type antenna element as an origin;
the third antenna oscillators comprise four antenna oscillators which are respectively distributed in the positive direction of an X axis, the negative direction of the X axis, the positive direction of a Y axis and the negative direction of the Y axis of the second coordinate system, and the distance between each third antenna oscillator and the first antenna oscillator is 1.7-1.8 times of wavelength; the second coordinate system is a coordinate system which is established by taking the center of the first type antenna oscillator as an origin and is positioned on the same plane as the first coordinate system, and an included angle between an X axis of the second coordinate system and an X axis of the first coordinate system is 45 degrees;
the fourth antenna oscillator comprises four antenna oscillators which are respectively distributed in the positive direction of an X axis, the negative direction of the X axis, the positive direction of a Y axis and the negative direction of the Y axis of the first coordinate system, and the distance between the second antenna oscillator and the fourth antenna oscillator which are distributed in the positive direction of the X axis of the first coordinate system is 0.7-0.8 wavelength; the distance between the second type antenna element and the fourth type antenna element distributed in the X-axis negative direction of the first coordinate system is 0.7-0.8 times of wavelength; the distance between the second type of antenna element and the fourth type of antenna element distributed in the positive direction of the Y axis of the first coordinate system is 0.7-0.8 times of wavelength; the distance between the second type antenna element and the fourth type antenna element distributed in the Y-axis negative direction of the first coordinate system is 0.7-0.8 times of wavelength; in each direction, the second type antenna element is arranged between the first type antenna element and the fourth type antenna element;
the phases of the first type antenna element, the second type antenna element and the third type antenna element are the same; the phases of the first type antenna element and the fourth type antenna element are opposite;
the power weighting ratio of the first type antenna element, the second type antenna element, the third type antenna element and the fourth type antenna element is 28:4:1: 1.
2. An antenna array according to claim 1, wherein the four antenna elements comprised by the second type of antenna element are equidistant from the first type of antenna element.
3. An antenna array according to claim 2, wherein the four antenna elements comprised by the third type of antenna element are equidistant from the first type of antenna element.
4. An antenna array according to claim 3, wherein the distance between the antenna elements of the second type and the antenna elements of the fourth type distributed in the positive X-axis direction of the first coordinate system is a first distance; the distance between the second type of antenna element and the fourth type of antenna element distributed in the X-axis negative direction of the first coordinate system is a second distance; the distance between the second type of antenna element and the fourth type of antenna element distributed in the positive direction of the Y axis of the first coordinate system is a third distance; the distance between the second type antenna element and the fourth type antenna element distributed in the Y-axis negative direction of the first coordinate system is a fourth distance; and the first distance, the second distance, the third distance and the fourth distance are all equal.
5. An antenna array according to claim 4, wherein the first type of antenna element is spaced from the second type of antenna element by a distance of 0.7 wavelengths; the distance between the first type of antenna element and the third type of antenna element is 1.7 times of wavelength; the first distance, the second distance, the third distance, and the fourth distance are all equal to 0.7 wavelengths.
6. An antenna array according to any of claims 1-5, characterized in that the first, second, third and fourth antenna elements are dual polarized antenna elements.
7. An antenna comprising the antenna array of any one of claims 1 to 6, further comprising a reflector plate and a power dividing network;
the antenna array is arranged on one surface of the reflecting plate; the power distribution network is arranged on the other surface of the reflecting plate; the antenna array is connected with the power distribution network through a coaxial cable.
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| CN113296097A (en) * | 2021-06-28 | 2021-08-24 | 中国人民解放军国防科技大学 | SAR image sidelobe suppression method |
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| CN113296097A (en) * | 2021-06-28 | 2021-08-24 | 中国人民解放军国防科技大学 | SAR image sidelobe suppression method |
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