CN209948058U - Large-spacing low-grating-lobe electric large microstrip array antenna based on high-order odd-order mode resonance - Google Patents
Large-spacing low-grating-lobe electric large microstrip array antenna based on high-order odd-order mode resonance Download PDFInfo
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Abstract
A large-space low-grating lobe electric large microstrip array antenna based on high-order odd-order mode resonance comprises: the radiation unit array, the upper dielectric substrate, the lower metal floor, the lower dielectric substrate and the feed network are stacked from top to bottom, and the feed network feeds powerThe input end of the network is used as the input end of the antenna, the output end of the feed network is connected with the radiation unit array, the radiation unit array is connected with the feed network through a metal probe, and the high-order odd-order mode is TM30/TM03And the radiating unit array comprises 8 square patch antenna units which are transversely arranged at equal intervals, the side length of each square patch antenna unit is 1.08 times of the central frequency wavelength of the working frequency band, and the interval between the adjacent square patch antenna units is 1.8 times of the central frequency wavelength of the working frequency band. The utility model discloses can effectively avoid the odd number of times mould side lobe of high order and big array element interval to the influence of array antenna directional characteristic, make the odd number of times mould of high order that has big side lobe can normally apply to the array antenna design.
Description
Technical Field
The utility model belongs to the technical field of the antenna, concretely relates to big microstrip array antenna of big grid lamella electricity of big interval based on odd-order mode resonance of high order.
Background
As an important component of information transmission between wireless communication systems, microstrip antennas are widely used due to their advantages of small size, low profile, and the like. With the coming of the 5G era, the low-frequency band spectrum resources are increasingly tense, and the development of the microstrip antenna to high-frequency millimeter waves and submillimeter waves becomes a necessary trend. Since the size of the antenna is half of the wavelength of the resonant frequency, the size of the microstrip antenna is gradually reduced as the operating frequency of the antenna is increased, which causes certain problems in the manufacture and application of the antenna. On the one hand, this will put high demands on the manufacturing process, since the antenna is undersized. On the other hand, the antenna with too small size will be difficult to satisfy the fixed installation requirement of some equipments. In order to solve these problems caused by the antenna size being too small, it is necessary to design a microstrip antenna having electrically large size characteristics by breaking through the limitation that the size of the antenna is one-half of the resonant frequency wavelength. That is, the size of the electrically large antenna is larger than that of the conventional antenna at the same resonance frequency.
The resonant mode of the conventional square patch antenna is TM10/TM01Mode, however for TMn0/TM0nHigh-order odd-order modes (n-3, 5,7 …) and the like not only have higher gain, but also have TM and TM10/TM01Mode-like normal phase radiation characteristics. More importantly, at the same size, the TMn0/TM0nThe operating frequency of the mode being TM10/TM01N times of the modeAnd left and right, which is very advantageous for the implementation of an electrically large antenna. However, due to TMn0/TM0nThe modes have large side lobes which make higher order modes difficult to apply to antenna designs. Meanwhile, in the face of the current complex communication environment, it is also a real need to design an array antenna with high gain characteristics. Obviously, the application of the high-order odd-order mode to the design of the array antenna has certain practical significance, so that the requirement of the antenna on a processing process can be reduced to a certain extent, the antenna is convenient to fixedly mount on equipment, and meanwhile, the practical application problem of the high-order odd-order mode is solved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a big microstrip array antenna of big low grid lamella electricity of big interval based on odd mode resonance of high order. The utility model discloses can normally be applied to array antenna design with the odd number of times mould of high order, under the prerequisite of not loading any structure, effectively avoided the influence of the odd number of times mould side lobe of high order and big array element interval to array antenna directional characteristic.
The utility model adopts the technical proposal that:
a large-space low-grating lobe electric large microstrip array antenna based on high-order odd-order mode resonance comprises: the antenna comprises a radiation unit array, an upper dielectric substrate, a lower metal floor, a lower dielectric substrate and a feed network which are arranged in a stacking mode from top to bottom, wherein the input end of the feed network is used as the antenna input end, the output end of the feed network is connected with the radiation unit array, the radiation unit array is connected with the feed network through a metal probe, and the high-order odd-order mode is TM30/TM03And the radiating unit array comprises 8 square patch antenna units which are transversely arranged at equal intervals, the side length of each square patch antenna unit is 1.08 times of the central frequency wavelength of the working frequency band, and the interval between the adjacent square patch antenna units is 1.8 times of the central frequency wavelength of the working frequency band.
The utility model has the advantages that:
the utility model discloses can realize normally being applied to array antenna with the odd number of times mould of high order, effectively avoid the odd number of times mould side lobe of high order and the influence of big array element interval to array antenna directional characteristic.Because the high-order odd-order mode has larger side lobe (refer to fig. 7a), which makes the high-order odd-order mode difficult to be normally applied, the utility model discloses a arrange eight antenna units with side length of 1.08 times of central frequency wavelength of working frequency band according to specific interval, make the high-order odd-order mode with large side lobe normally apply to array antenna design without loading any structure; utilize null region and the superposition of array factor grating lobe of high order odd mode unit directional diagram, reduced the grating lobe (refer to fig. 7b) of array antenna directional diagram, particularly, the radiating element array is arranged by 8 square paster antenna unit equidistant levels that have big size characteristic of electricity and constitutes, square paster antenna unit size is 1.08 times operating band central frequency wavelength, the array element interval of radiating element array is 1.8 times operating band central frequency wavelength, the odd mode of high order is TM30/TM03And (5) molding. Because the antenna element based on the odd mould of high order has the big characteristic of electricity, so, the utility model discloses an enlarge array antenna size's purpose under equal operating frequency, reduced the requirement of high frequency millimeter wave antenna to processing technology. Meanwhile, the utility model discloses under the condition that the unit interval is 1.8 times operating band central frequency wavelength, utilize the null region of high order odd number mode directional diagram, fine reduction the side lobe of high order odd number mode and the influence of big array element interval to array antenna directional characteristic.
Drawings
Fig. 1 is a schematic diagram of a layered structure of a large-pitch low-grating-lobe electric large microstrip array antenna substrate based on high-order odd-order mode resonance in this embodiment.
Fig. 2 is a schematic diagram of an overall layered structure of the large-pitch low-grating-lobe electrically large microstrip array antenna based on the higher-order odd-order mode resonance in the present embodiment.
Fig. 3 is a schematic structural diagram of the radiating element array of the large-pitch low-grating-lobe electric large microstrip array antenna based on the higher-order odd-order mode resonance and the upper dielectric substrate in the embodiment.
Fig. 4a is a schematic view of a lower metal floor structure of a large-pitch low-grating-lobe electrically large microstrip array antenna based on high-order odd-order mode resonance in this embodiment.
Fig. 4b is a schematic view of a partial structure of a lower metal floor of the large-pitch low-grating-lobe electrically large microstrip array antenna based on the high-order odd-order mode resonance in this embodiment.
Fig. 5a is a schematic structural diagram of a feed network of the large-pitch low-grating-lobe electric large microstrip array antenna based on the higher-order odd-order mode resonance in this embodiment.
Fig. 5b is a schematic structural diagram of a large-gap low-grating-lobe electric large microstrip array antenna 1: 1-to-two-path microstrip power divider based on high-order odd-order mode resonance in this embodiment.
Fig. 5c is a schematic structural diagram of a second 1: 1-to-two-way microstrip power divider of the large-gap low-grating-lobe electric large microstrip array antenna based on the high-order odd-order mode resonance in this embodiment.
Fig. 5d is a schematic structural diagram of a third 1: 1-to-two-way microstrip power divider of the large-gap low-grating-lobe electric large microstrip array antenna based on the high-order odd-order mode resonance in this embodiment.
Fig. 5e is a schematic structural diagram of an output port of the large-pitch low-grating-lobe electrically large microstrip array antenna based on the higher-order odd-order mode resonance in this embodiment.
Fig. 6 is a return loss curve diagram of the large-pitch low-grating-lobe electric large microstrip array antenna based on the higher-order odd-order mode resonance in the embodiment.
Fig. 7a is a high-order odd-order mode E-plane directional diagram of the large-pitch low-grating-lobe electrically large microstrip array antenna based on high-order odd-order mode resonance in the present embodiment.
Fig. 7b is a normalized radiation pattern of the large grating lobe of the large-pitch low-grating lobe electric large microstrip array antenna based on the higher-order odd-order mode resonance in the embodiment.
Fig. 7c is the normalized radiation pattern at 18.5GHz after the large grating lobe is eliminated by the large-space low-grating lobe electric large microstrip array antenna based on the higher-order odd-order mode resonance in the embodiment.
Detailed Description
A large-space low-grating lobe electric large microstrip array antenna based on high-order odd-order mode resonance comprises: the radiation unit array 1, the upper dielectric substrate 2, the lower metal floor 3, the lower dielectric substrate 4 and the feed network 5 are stacked from top to bottom, and the feed network 5 is connected with the output end of the feed network 5The input end is used as the input end of an antenna, the output end of a feed network 5 is connected to a radiation unit array 1, the radiation unit array 1 is connected with the feed network 5 through a metal probe p, and the high-order odd-order mode is TM30/TM03The radiation unit array 1 comprises 8 square patch antenna units 11 which are transversely arranged at equal intervals, the side length of each square patch antenna unit 11 is 1.08 times of the central frequency wavelength of an operating frequency band, the interval d between every two adjacent square patch antenna units is 1.8 times of the central frequency wavelength of the operating frequency band, the operating frequency band is 18.3 GHz-18.7 GHz, and a circular groove is formed in the lower metal floor 3 so that a metal probe p can pass through the lower metal floor 3 in a contactless manner;
the feed network 5 comprises a first one-to-two path microstrip power divider 51, an input end I of the first one-to-two path microstrip power divider 51 is used as an input end of the feed network 5, output ends of the first one-to-two path microstrip power divider 51 are respectively connected with a second one-to-two path microstrip power divider 52, output ends of the second one-to-two path microstrip power divider 52 are respectively connected with a third one-to-two path microstrip power divider 53, and 8 output ends O of the third one-to-two path microstrip power divider 53 are used as output ends of the feed network 5 and are respectively connected with 8 square patch antenna units 11;
the output end O of each third-stage one-to-two-path microstrip power divider 53 is transversely deviated from the center of the square patch by 2 mm;
the output end O of the third one-to-two path microstrip power divider 53 is circular 54 and is connected with a metal probe, and the metal probe penetrates through the lower dielectric substrate 4, the lower metal floor 3 and the upper dielectric substrate 2 and feeds the radiation unit array 1.
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings:
with reference to fig. 1 and 2, a large-pitch low-grating-lobe electric large microstrip array antenna based on high-order odd-order mode resonance comprises a radiation unit array 1, an upper dielectric substrate 2, a lower metal floor 3, a lower dielectric substrate 4 and a feed network 5, which are stacked from top to bottom, wherein the input end of the feed network 5 is used as an antenna input end, the output end of the feed network 5 is connected to the radiation unit array 1, and a metal probe p penetrating through the upper dielectric floor 2, the lower metal floor 3 and the lower dielectric substrate 4 is arranged between the radiation unit array 1 and the feed network 5;
further, referring to fig. 3, the radiation unit array 1 includes 8 square patch antenna units arranged transversely at equal intervals and having electrically large size characteristics, the side length of each square patch antenna unit is 1.08 times of the central frequency wavelength of the working frequency band, the equal interval d between adjacent square patch antenna units is 1.8 times of the central frequency wavelength of the working frequency band, and the higher-order odd-order mode is TM30/TM03And (5) molding.
Further, with reference to fig. 4a and 4b, the lower metal floor 3 is engraved with 8 circular grooves for receiving probes.
Further, with reference to fig. 5a, 5b, 5c, 5d, and 5e, the feeding network 5 includes a first-stage one-to-two microstrip power divider 51, an input end I of the first-stage one-to-two microstrip power divider 51 is used as an input end of the unequal power distribution network 5, output ends of the first-stage one-to-two microstrip power divider 51 are respectively connected with a second-stage one-to-two microstrip power divider 52, output ends of the second-stage one-to-two microstrip power divider 52 are respectively connected with a third-stage one-to-two microstrip power divider 53, and 8 output ends O of the third-stage one-to-two microstrip power divider 53 are used as output ends of the unequal power distribution network 5 and are respectively connected with the 8 square patch antenna units 11.
In this embodiment, the array antenna energy is input from the feed network 5 to excite the radiation unit array 1, so that the square antenna units in the radiation array unit 1 all work in a high-order odd-order mode, at this time, the size of the square antenna unit is 1.08 times of the central frequency wavelength of the working frequency band, the array element spacing of the radiation array unit 1 is 1.8 times of the central frequency wavelength of the working frequency band, and the high-order odd-order mode is TM30/TM03And (5) molding. Because there are two null areas in square antenna element's E face directional diagram, the utility model discloses utilize unit directional diagram null area superposes with array factor grating lamellaThis makes the directional diagram of the present invention free of severe grating lobes.
With reference to fig. 6, 7a and 7b, the utility model discloses an operating frequency range is 18.3GHz to 18.7GHz square paster unit is equidistant to be arranged, array element interval is under the prerequisite of 1.8 times operating band central frequency wavelength, and the grating lobe is less than-15 dB in the whole operating bandwidth. The size of the high-frequency millimeter wave array antenna is effectively enlarged, the requirement on the processing technology is reduced, and the influence of high-order odd-order mode side lobes and large array element spacing on the directional characteristic of the array antenna is effectively avoided, so that the high-order odd-order mode with the large side lobes can be normally applied to the design of the array antenna.
Claims (5)
1. A large-space low-grating lobe electric large microstrip array antenna based on high-order odd-order mode resonance comprises: the antenna comprises a radiation unit array (1), an upper dielectric substrate (2), a lower metal floor (3), a lower dielectric substrate (4) and a feed network (5) which are stacked from top to bottom, wherein the input end of the feed network (5) is used as an antenna input end, the output end of the feed network (5) is connected to the radiation unit array (1), the radiation unit array (1) is connected with the feed network (5) through a metal probe (p), and the antenna is characterized in that the high-order odd-order mode is TM30/TM03The radiating element array (1) comprises 8 square patch antenna units (11) which are transversely arranged at equal intervals, the side length of each square patch antenna unit (11) is 1.08 times of the central frequency wavelength of the working frequency band, and the interval (d) between every two adjacent square patch antenna units is 1.8 times of the central frequency wavelength of the working frequency band.
2. The large-pitch low-grating-lobe electrically large microstrip array antenna based on high-order odd-order mode resonance according to claim 1, wherein a circular groove is opened on the lower metal floor (3) to allow the metal probe (p) to pass through the lower metal floor (3) without contact.
3. The large-gap low-grating-lobe electric large microstrip array antenna based on the high-order odd-order mode resonance as claimed in claim 2, wherein the feed network (5) comprises a first-stage one-to-two-way microstrip power divider (51), an input end (I) of the first-stage one-to-two-way microstrip power divider (51) is used as an input end of the feed network (5), output ends of the first-stage one-to-two-way microstrip power divider (51) are respectively connected with a second-stage one-to-two-way microstrip power divider (52), output ends of the second-stage one-to-two-way microstrip power divider (52) are respectively connected with a third-stage one-to-two-way microstrip power divider (53), and 8 output ends (O) of the third-stage one-to-two-way microstrip power divider (53) are used as output ends of the feed network (5) and are respectively connected with 8 square patch antenna units (11.
4. The large-pitch low-grating-lobe electrically large microstrip array antenna based on the higher-order odd-order mode resonance of claim 3, wherein the output end (O) of each third-stage two-way microstrip power divider (53) is laterally deviated from the center of the square patch by 2 mm.
5. The large-pitch low-grating-lobe electric large microstrip array antenna based on the higher-order odd-order mode resonance as claimed in claim 4, wherein the output end (O) of the third-level two-way microstrip power divider (53) is circular (54) and connected with the metal probe (p), and the metal probe (p) penetrates through the lower dielectric substrate (4), the lower metal floor (3) and the upper dielectric substrate (2) and feeds the radiation element array (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921215238.0U CN209948058U (en) | 2019-07-30 | 2019-07-30 | Large-spacing low-grating-lobe electric large microstrip array antenna based on high-order odd-order mode resonance |
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| CN201921215238.0U CN209948058U (en) | 2019-07-30 | 2019-07-30 | Large-spacing low-grating-lobe electric large microstrip array antenna based on high-order odd-order mode resonance |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116111368A (en) * | 2023-04-11 | 2023-05-12 | 南京金荣德科技有限公司 | Binary microstrip antenna array and antenna beam broadening optimization method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116111368A (en) * | 2023-04-11 | 2023-05-12 | 南京金荣德科技有限公司 | Binary microstrip antenna array and antenna beam broadening optimization method thereof |
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