CN211578936U - Microstrip array antenna and microstrip power divider thereof - Google Patents
Microstrip array antenna and microstrip power divider thereof Download PDFInfo
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- CN211578936U CN211578936U CN202020378583.2U CN202020378583U CN211578936U CN 211578936 U CN211578936 U CN 211578936U CN 202020378583 U CN202020378583 U CN 202020378583U CN 211578936 U CN211578936 U CN 211578936U
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Abstract
The embodiment of the utility model provides a ware is divided to microstrip array antenna and microstrip merit thereof, the ware is divided to the microstrip merit sets up in the front of medium base plate and is connected with the radiation linear array one-to-one, input and multichannel output on including the main feeder and locating the main feeder, every way output correspondence is connected a radiation linear array and for the radiation linear array feed of being connected, the main feeder uses one end tip to form the output in proper order to the tip end from the input as the input, each way output is parallel to each other and intersects with the main feeder, contained angle between the input of each output and main feeder to the district section of each output is acute angle or obtuse angle. According to the design principle of the antenna, the included angle between each output end and the input end of the main feeder line and the section between the output ends is an acute angle or an obtuse angle, so that any two adjacent output ends generate a constant phase difference, the feeder line of each output end does not need to be completely fed, the structure is simpler, and the design cost and the antenna loss are lower.
Description
Technical Field
The embodiment of the utility model provides a relate to antenna technical field, especially relate to a microstrip array antenna and microstrip merit divides ware.
Background
The existing microstrip array antenna generally comprises a dielectric substrate, a microstrip power divider and a plurality of radiation linear arrays, wherein the microstrip power divider and the plurality of radiation linear arrays are arranged on the front surface of the dielectric substrate, each output end of the microstrip power divider is correspondingly connected with one radiation linear array and feeds the connected radiation linear array, and in order to realize beam shaping and main beam deflection, a feeder line at the output end of the microstrip power divider is generally set to be in a bent shape, and the bent lengths of feeder lines at different output ends are changed, so that constant phase difference of each output end is realized; however, in the conventional design, in order to consider the routing layout and the constant phase difference of each output end, the feeder line at each output end is too long in bending, occupies an area, increases the size of the whole antenna, and also increases the cost; in addition, the loss and unnecessary radiation of the antenna are greatly improved due to the fact that the feeder line is too long and is bent in a complex manner.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a technical problem that will solve provides a ware is divided to microstrip merit, and simple structure can effectively realize the invariable phase difference of each way output.
The embodiment of the utility model provides a technical problem who further will solve lies in, provides a microstrip array antenna, and simple structure can effectively realize beam forming.
In order to solve the technical problem, an embodiment of the utility model provides a following technical scheme: the utility model provides a microstrip power divider, sets up in the front of medium base plate and is connected with the radiation linear array one-to-one, the microstrip power divider includes the main feed line and sets up input and the multichannel output on the main feed line, and every way output corresponds and connects a radiation linear array and for the radiation linear array feed that connects, the main feed line uses one end portion as the input and from the input forms in proper order to the tip end the output, each way the output is parallel to each other and intersects with the main feed line, and the contained angle between the section of each output and the input of main feed line to each output is acute angle or obtuse angle.
Furthermore, the output ends of each path are distributed along the main feeder line at equal intervals.
Furthermore, the ends of the output ends connected with the radiation linear arrays are parallel and level with each other, and the output ends of the output ends are parallel and level with each other
The connecting line of the tail ends of the radiating linear arrays is vertical to the central axis of the radiating linear arrays in the length direction.
Furthermore, the position of the main feeder line, which corresponds to each output end, is provided with an impedance matching module.
Furthermore, the area of each impedance matching module is gradually increased from the input end to the end according to the Chebyshev rule.
Further, the length of each impedance matching module is a quarter wavelength.
On the other hand, in order to solve the above technical problem, the embodiment of the utility model provides a following technical scheme: a microstrip array antenna comprises a dielectric substrate, a ground plate arranged on the back of the dielectric substrate, a microstrip power divider and a plurality of radiation linear arrays, wherein the microstrip power divider and the plurality of radiation linear arrays are both arranged on the front of the dielectric substrate, each output end of the microstrip power divider is correspondingly connected with one radiation linear array and feeds power to the connected radiation linear array, and the microstrip power divider is any one of the microstrip power dividers.
Furthermore, the radiation linear array is formed by sequentially connecting a plurality of array elements in series through microstrip lines, and the effective radiation area of each array element of the same radiation linear array is symmetrically gradually reduced from the middle part of the radiation linear array to two ends.
Furthermore, the radiation energy of each array element of the same radiation linear array, which is symmetrically distributed from the middle part of the radiation linear array to the two ends step by step, is correspondingly gradually cut according to Chebyshev.
Furthermore, the structures of the plurality of radiation line arrays are all the same and are arranged in parallel at equal intervals.
After the technical scheme is adopted, the embodiment of the utility model provides an at least, following beneficial effect has: the embodiment of the utility model provides a do with one end tip through the main feed line the input and from the input plays to the tip end forms in proper order the output, and each way the output is parallel to each other and intersects with the main feed line, and contained angle between the input of each output and main feed line to the district section of each output is acute angle or obtuse angle, and according to the design principle of antenna, make output and main feed line form acute angle or obtuse angle to arbitrary adjacent two tunnel outputs produce invariable phase difference, need not to buckle to the feeder of every way output, and the structure is simpler, has also reduced overall length, and the effectual size that reduces the feed network, be favorable to reducing the volume of microstrip array antenna, design cost has been reduced.
Drawings
Fig. 1 is a schematic plan view of an alternative embodiment of the microstrip array antenna of the present invention.
Fig. 2 is a 2D directional diagram of the YOZ plane of an alternative embodiment of the microstrip array antenna of the present invention in the 76.5GHz band.
Detailed Description
The present application will now be described in further detail with reference to the accompanying drawings and specific examples. It is to be understood that the following illustrative embodiments and description are only intended to illustrate the present invention, and are not intended to limit the present invention, and features in the embodiments and examples may be combined with each other in the present application without conflict.
As shown in fig. 1, an embodiment of the present invention provides a microstrip power divider 1, which is disposed on the front surface of a dielectric substrate 3 and connected to a radiation line array 5 in a one-to-one manner, the microstrip power divider 1 includes a main feeder 10 and an input end 12 and multiple output ends 14 disposed on the main feeder 10, each output end 14 is correspondingly connected to one radiation line array 5 and feeds the connected radiation line array 5, the main feeder 10 uses an end portion as the input end 12, and from the input end 12 to a tip end, the output ends 14 are sequentially formed, each output end 14 is parallel to each other and intersects with the main feeder 10, and an included angle β between each output end 14 and the input end 12 of the main feeder 10 and a section of each output end 14 is an acute angle or an obtuse angle.
The embodiment of the utility model provides a do with one end tip through main feeder 10 input 12 and certainly input 12 plays and forms in proper order to the tip end output 14, and each way output 14 is parallel to each other and intersects with main feeder 10, contained angle beta between the input 12 of each output 14 and main feeder 10 to the district section of each output 14 is acute angle or obtuse angle, according to the design principle of antenna, make output 14 and main feeder 10 form acute angle or obtuse angle to arbitrary adjacent two way output 14 produces invariable phase difference, the structure is simpler, and the effectual size that reduces the feed network, be favorable to reducing the volume of microstrip array antenna, design cost has been reduced.
In the specific design, according to the antenna design principle, in order to generate a constant phase difference Δ Φ between adjacent output ends 14, the beam deflection angle θ of the antenna, the wavelength λ of the antenna, and the distance d between the output ends 14 are realized, and in addition, because each of the radiation line arrays 5 is parallel to each other, and the included angle β between each of the output ends 14 and the section from the input end 12 of the main feeder 10 to each of the output ends 14 is an acute angle or an obtuse angle, a predetermined included angle, i.e., the included angle α shown in fig. 1, is inevitably present between the central axis of the main feeder 10 and a plane passing through the input end of the main feeder 10 and perpendicular to the central axis of the radiation line arrays 5, and according to the:
the specific value of the included angle α can be accurately calculated by the above relational expression, and as shown in fig. 1, there is an obvious corresponding relationship between the included angle α and the included angle β between the output end 14 and the section from the input end 12 to each output end 14 of the main feeder 10, that is, the included angle β between the output end 14 and the section from the input end 12 to each output end 14 of the main feeder 10 can be calculated by the included angle α.
In an alternative embodiment of the present invention, the output ends 14 are distributed along the main feeder 10 at equal intervals. In the present embodiment, the output ends 14 are distributed along the main feed line 10 at equal intervals, so that the phase differences generated by the adjacent output ends 14 are the same.
In another optional embodiment of the present invention, each of the output ends 14 is parallel to the end of the radiation linear array 5, and the end connecting line of each of the output ends 14 is perpendicular to the central axis of the radiation linear array 5 in the length direction. In this embodiment, the ends of the output ends 14 connected to the radiation linear arrays 5 are parallel and level with each other, so that the overall structure is simpler, and the end connecting lines of each output end 14 are perpendicular to the central axis of the radiation linear array 5 in the length direction, thereby facilitating the realization of amplitude weighting of each output end 14.
In another optional embodiment of the present invention, an impedance matching module 16 is further disposed at a position of the main feeder 10 corresponding to each output end 14. The embodiment of the utility model provides a still match module 16 through setting up impedance to realize the range weighting to every way output 14.
In yet another alternative embodiment of the present invention, the area of each of the impedance matching modules 16 increases from the input end 12 to the distal end in a stepwise manner according to the chebyshev rule. In this embodiment, the area of each impedance matching module 16 is weighted according to the chebyshev rule to realize the amplitude weighting of each radiation linear array 5, and the design is relatively simple. In addition, it can be understood that, because the areas of the impedance matching modules 16 at each output end 14 are different, the phase difference of each radiation line array 5 may be different, and therefore, in the actual design, the distance between the output ends 14 needs to be flexibly adjusted to ensure that the phase difference of each radiation line array 5 is equal.
In yet another alternative embodiment of the present invention, each of the impedance matching modules 16 has a length of one quarter wavelength. In this embodiment, the length of each impedance matching module 16 is a quarter wavelength, and in the specific design, only the width of the impedance matching module 16 needs to be changed, so that the amplitude weighting of each radiation linear array 5 is adjusted, and the design is more convenient.
On the other hand, the embodiment of the utility model provides a microstrip array antenna, including the dielectric substrate 3, set up in the ground plate 7 of the dielectric substrate back 3 and all set up in ware 1 and many radiation linear arrays 5 are divided to the positive microstrip merit of dielectric substrate 3, every way output 14 of ware 1 is divided to the microstrip merit corresponds and connects a radiation linear array 5 and for the radiation linear array 5 feed that connects, ware 1 is divided to the microstrip merit as above-mentioned arbitrary the microstrip merit divide the ware. The embodiment of the utility model provides a microstrip array antenna adopts foretell microstrip merit to divide ware 1, and simple structure can effectually realize that the antenna beam deflects.
In an optional embodiment of the present invention, the radiating line array 5 is formed by sequentially connecting a plurality of array elements 50 in series through microstrip lines 52, and the effective radiating area of each array element 50 of the same radiating line array 5 decreases from the middle of the radiating line array 5 symmetrically to both ends step by step. This embodiment radiation linear array 5 is established ties in proper order by a plurality of array elements 50 and is constituteed, and the effective radiation area of each array element 50 of same radiation linear array 5 steadilys decrease to both ends step by step from radiation linear array 5's middle part symmetry, because every radiation linear array 5 uses microstrip line 52 to connect each array element 50 and carries out series feed, simple structure can will moreover when concrete radar design the utility model discloses with radio frequency circuit processing on same plane, reduce one deck radio frequency circuit layer, the effectual thickness that reduces whole radar. In the embodiment shown in fig. 1, each of the radiating linear arrays 5 includes 13 array elements 50; and the utility model provides a microstrip array antenna includes 6 radiation linear array 5 altogether, ware 1 correspondence is divided to the microstrip merit is formed with 6 output 14.
In another optional embodiment of the present invention, the radiation energy of each array element 50 of the same radiation line array 5, which is distributed from the middle of the radiation line array 5 to both ends step by step, is cut gradually according to chebyshev. The radiation energy of each array element 50 in this embodiment correspondingly meets the requirements of chebyshev tapering, and in order to meet the requirement of low sidelobe in the E-plane, chebyshev tapering cloth is used as the initial value of the current amplitude ratio of the array element 5, thereby ensuring the requirements of the main radiation direction on the direction perpendicular to the antenna dielectric plate and the low sidelobe.
In another optional embodiment of the present invention, the plurality of radiating linear arrays 5 have the same structure and are arranged in parallel at equal intervals. The embodiment adopts the structure that many radiation linear arrays 5 are all the same and equidistant ground parallel arrangement, and every radiation linear array 5 that the structure is the same radiating effect is the same to equidistant parallel arrangement is favorable to optimizing circuit layout, reduces area occupied, and radiating effectual moreover, simple structure easily realizes.
In addition, as shown in fig. 2, the microstrip array antenna provided by the present invention is applied to the 76.5GHz band, the main beam of the antenna deflects 28.6 degrees in the forward direction of the azimuth plane, and the side lobe level SLL is-18.76 dB.
The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, and these forms are within the scope of the present invention.
Claims (10)
1. A microstrip power divider is arranged on the front surface of a dielectric substrate and is connected with radiation linear arrays in a one-to-one correspondence manner, and comprises a main feeder line, an input end and multiple output ends, wherein the input end and the multiple output ends are arranged on the main feeder line, each output end is correspondingly connected with one radiation linear array and feeds the connected radiation linear array, the microstrip power divider is characterized in that the main feeder line takes one end part as the input end, the output ends are sequentially formed from the input end to a tip end, the output ends are mutually parallel and intersect with the main feeder line, and an included angle between each output end and a section from the input end of the main feeder line to each output end is an acute angle or an obtuse angle.
2. The microstrip power divider of claim 1 wherein each of said output terminals is equally spaced along a main feed line.
3. The microstrip power divider according to claim 1 or 2, wherein ends of the output terminals of the respective paths connected to the radiating linear arrays are flush with each other, and a connecting line of the tail ends of the output terminals of the respective paths is perpendicular to a central axis of the radiating linear arrays in the length direction.
4. The microstrip power divider of claim 1, wherein an impedance matching module is further disposed at a position of the main feed line corresponding to the output end of each path.
5. The microstrip power divider of claim 4, wherein the area of each of said impedance matching modules increases stepwise from the input end to the tip end of said main feed line according to the Chebyshev rule.
6. The microstrip power divider of claim 5 wherein each of the impedance matching modules has a length of one quarter wavelength.
7. A microstrip array antenna comprises a dielectric substrate, a ground plate arranged on the back of the dielectric substrate, and a microstrip power divider and a plurality of radiating linear arrays which are both arranged on the front of the dielectric substrate, wherein each output end of the microstrip power divider is correspondingly connected with one radiating linear array and feeds the connected radiating linear array, and the microstrip power divider is the microstrip power divider as claimed in any one of claims 1 to 6.
8. The microstrip array antenna according to claim 7 wherein the radiating line array is formed by connecting a plurality of array elements in series through microstrip lines in sequence, and the effective radiating area of each array element of the same radiating line array decreases from the middle of the radiating line array symmetrically to both ends.
9. The microstrip array antenna according to claim 8 wherein the radiation energy of each element of the same radiating line array, which is distributed step by step from the middle of the radiating line array symmetrically to both ends, is tapered according to chebyshev.
10. The microstrip array antenna of claim 7 wherein the plurality of radiating line arrays are all identical in structure and are arranged in parallel at equal spacing.
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| CN111276784A (en) * | 2020-03-23 | 2020-06-12 | 深圳市豪恩汽车电子装备股份有限公司 | Microstrip array antenna and microstrip power divider thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111276784A (en) * | 2020-03-23 | 2020-06-12 | 深圳市豪恩汽车电子装备股份有限公司 | Microstrip array antenna and microstrip power divider thereof |
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