CN111600137A - Multi-standard mobile communication signal direction-finding antenna - Google Patents
Multi-standard mobile communication signal direction-finding antenna Download PDFInfo
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- CN111600137A CN111600137A CN202010384627.7A CN202010384627A CN111600137A CN 111600137 A CN111600137 A CN 111600137A CN 202010384627 A CN202010384627 A CN 202010384627A CN 111600137 A CN111600137 A CN 111600137A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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Abstract
The invention discloses a multi-standard mobile communication signal direction-finding antenna, which comprises a low-frequency antenna array and a high-frequency antenna array; the low-frequency antenna array comprises a plurality of low-frequency circularly polarized antennas which are arranged on the same horizontal plane in an L shape, the low-frequency circularly polarized antennas comprise upper-layer microstrip antennas, middle-layer microstrip antennas, bottom-layer microstrip antennas, a feed network layer and a ground plate, and the high-frequency antenna array comprises a plurality of high-frequency circularly polarized antennas which are arranged on the same horizontal plane in an L shape; the high frequency circularly polarized antenna comprises a first Vivaldi antenna element and a second Vivaldi antenna element which are orthogonal to each other. The invention has simple structure and reasonable design, designs the low-frequency circularly polarized antenna which is respectively applied to 0.8GHz-0.96GHz and the high-frequency circularly polarized antenna which is applied to 1.7GHz-2.7GHz, and can achieve the effect of full-band coverage by using the two circularly polarized antennas; the low-frequency circularly polarized antenna and the high-frequency circularly polarized antenna are used as array elements, and two groups of L-shaped direction-finding arrays are respectively designed, so that the problems of large size and narrow bandwidth of the direction-finding arrays are solved.
Description
Technical Field
The invention belongs to the technical field of antenna communication, and particularly relates to a multi-standard mobile communication signal direction-finding antenna.
Background
At present, radio technology is rapidly developed, and radio direction finding has received more and more attention in the industry as an important technical means for radio monitoring, technical investigation and electronic countermeasure. Radio direction finding devices use antennas, which are an important component of radio direction finding devices, to find beacons or signal sources, and the performance of the direction finding antenna, especially the pattern performance, determines the sensitivity of the radio direction finding device.
The direction-finding antenna is a front end component used for transmitting and receiving electromagnetic waves in a mobile communication signal direction-finding system, and has the function of performing interconversion between the electromagnetic waves and induced electromotive force.
Due to the rapid development of the mobile communication industry in China, a situation of coexistence of 2G/3G/4G networks is formed, and the mobile communication network is respectively set up and managed by three operators of China Mobile, China Unicom and China telecom. The mobile communication systems used by three operators in China are very various, including four types of GSM, DSC, CDMA and LTE, and the frequency points used by the uplink and the downlink are distributed in two frequency bands of 0.8GHz-0.96GHz and 1.7GHz-2.7 GHz.
The portable mobile direction finding system in the current market has the problem of insufficient working bandwidth, for example, the digital code detection direction finding system of the Datang mobile phone cannot support the mobile phone direction finding of DSC and CDMA communication systems, because the working frequency bands of the direction finding antenna used by the system are only 0.89GHz-0.96GHz and 2.3GHz-2.7GHz, the problem of mobile phone missing detection can occur. The usability of the direction-finding system for mobile communication signals of various systems can be ensured only by expanding the working bandwidth of the direction-finding antenna to the full frequency band of the mobile communication network, and the practicability of the mobile communication direction-finding system is improved. Therefore, a small broadband circularly polarized antenna for direction finding of mobile communication signals of multiple systems is needed, which can solve the outstanding problems of large size, narrow bandwidth and the like of the existing direction-finding antenna.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a multi-system mobile communication signal direction-finding antenna aiming at the defects in the prior art, the structure is simple, the design is reasonable, two kinds of circularly polarized antennas which are respectively applied to the frequency bands of 0.8GHz-0.96GHz and 1.7GHz-2.7GHz are designed, and the effect of full-frequency-band coverage can be achieved by using the two kinds of circularly polarized antennas; the low-frequency circularly polarized antenna and the high-frequency circularly polarized antenna are used as array elements, two groups of L-shaped direction-finding arrays are respectively designed, and the problem of large size of the direction-finding arrays is solved.
In order to solve the technical problems, the invention adopts the technical scheme that: a multi-standard mobile communication signal direction-finding antenna is characterized in that: the antenna comprises a low-frequency antenna array for receiving 0.8GHz-0.96GHz and a high-frequency antenna array for receiving 1.7GHz-2.7 GHz; the low-frequency antenna array comprises a plurality of low-frequency circularly polarized antennas which are arranged on the same horizontal plane in an L-shaped arrangement, the low-frequency circularly polarized antenna comprises an upper layer microstrip antenna, a middle layer microstrip antenna, a bottom layer microstrip antenna, a feed network layer and a ground plate, the upper layer microstrip antenna comprises an upper layer microstrip patch and an upper layer dielectric substrate, the upper layer microstrip patch is provided with a corner cut and a central hole, the middle layer microstrip antenna comprises a middle layer microstrip patch and a middle layer medium substrate, the middle layer microstrip patch is obliquely and symmetrically arranged, the bottom layer microstrip antenna comprises a bottom layer dielectric substrate and a metal conduction band etched on the bottom layer dielectric substrate, the feed network layer at the bottom layer comprises a feed dielectric substrate and a feed network circuit board, and the feed network circuit board comprises a Wilkinson power divider and a metal probe connected with an output port of the Wilkinson power divider; the high-frequency antenna array comprises a plurality of high-frequency circularly polarized antennas which are arranged on the same horizontal plane in an L-shaped manner; the high-frequency circularly polarized antenna comprises a first Vivaldi antenna array and a second Vivaldi antenna array which are orthogonal to each other.
The multi-standard mobile communication signal direction-finding antenna is characterized in that: the first Vivaldi antenna array comprises a first upper metal layer, a first lower ground layer and a first medium layer arranged between the first upper metal layer and the first lower ground layer, wherein the first medium layer is provided with a first microstrip feed line and a first metal patch connected with the first microstrip feed line, and the first metal patch bends to two ends of the first medium layer and is vertical to the plane of the first medium layer; the second Vivaldi antenna array comprises a second upper metal layer, a second lower grounding layer and a second medium layer arranged between the second upper metal layer and the second lower grounding layer, the second medium layer is provided with a second microstrip feed line and a second metal patch connected with the second microstrip feed line, the second metal patch bends to two ends of the second medium layer and is vertical to the plane of the second medium layer, and a groove for the first medium layer to insert is formed in the second medium layer.
The multi-standard mobile communication signal direction-finding antenna is characterized in that: the number of the low-frequency circularly polarized antennas is three, and the three low-frequency circularly polarized antennas are respectively positioned at three vertexes of the isosceles triangle.
The multi-standard mobile communication signal direction-finding antenna is characterized in that: the number of the high-frequency circularly polarized antennas is three, and the three high-frequency circularly polarized antennas are respectively positioned at three vertexes of the isosceles triangle.
The multi-standard mobile communication signal direction-finding antenna is characterized in that: the upper layer microstrip patch is square, the corner cut comprises two triangular corner cuts respectively positioned at two ends of a diagonal direction, and the central hole is a square hole positioned at the central position.
The multi-standard mobile communication signal direction-finding antenna is characterized in that: the center of the middle layer microstrip patch is provided with a connecting hole matched with the metal probe, the middle layer microstrip patch has the same size, the number of the middle layer microstrip patches is even, and the even number of the middle layer microstrip patches are obliquely and symmetrically arranged.
The multi-standard mobile communication signal direction-finding antenna is characterized in that: the number of the bottom dielectric substrates is four, the bottom dielectric substrates are enclosed to form square grooves, the four bottom dielectric substrates are rotationally symmetrical along the central axis of the square grooves, and the square grooves are respectively and vertically arranged with the upper-layer microstrip antenna, the middle-layer microstrip antenna and the feed network layer.
The multi-standard mobile communication signal direction-finding antenna is characterized in that: the metal conduction band is in a circular ring structure.
The multi-standard mobile communication signal direction-finding antenna is characterized in that: the first upper metal layer and the second upper metal layer are respectively provided with a feed structure, and the feed structure comprises a feed network with two stages of Wilkinson power dividers.
The multi-standard mobile communication signal direction-finding antenna is characterized in that: the tail end of the first microstrip feed line is connected with a first round stub.
Compared with the prior art, the invention has the following advantages:
1. the invention has simple structure, reasonable design and convenient realization, use and operation.
2. The invention designs two circularly polarized antennas respectively applied to frequency bands of 0.8GHz-0.96GHz and 1.7GHz-2.7GHz, and the effect of full-band coverage can be achieved by using the two circularly polarized antennas.
3. According to the invention, the low-frequency circularly polarized antenna and the high-frequency circularly polarized antenna are used as array elements, two groups of L-shaped direction-finding arrays are respectively designed, the high-frequency antenna array is arranged at the position of the L-shaped notch of the low-frequency antenna array, the idle space of the L-shaped array of the low-frequency circularly polarized antenna is fully utilized for placing the high-frequency circularly polarized antenna, and the problem of large size of the direction-finding array is effectively solved.
4. According to the invention, the circular polarization characteristic of the low-frequency circularly polarized antenna is improved by using the mode of cutting the upper layer microstrip patch corner and opening the hole; the coupling effect of the low-frequency circularly polarized antenna is enhanced by using a coupling feed mode; the miniaturization of the horizontal size of the low-frequency circularly polarized antenna is realized by utilizing a mode of loading the circular ring branches; the Wilkinson power divider of the bottom layer feed network layer ensures the integration of the antenna and has good use effect.
5. According to the invention, the first Vivaldi antenna array and the second Vivaldi antenna array are mutually orthogonal to form the high-frequency circularly polarized antenna, the antenna section is reduced by adopting a space folding mode, the broadband characteristic of the Vivaldi antenna is fully utilized, and the horizontal size of the antenna is reduced.
6. According to the invention, the two ends of the first metal patch extend out of the first dielectric layer and are respectively bent towards opposite directions, the bent part is bent towards the two sides of the first dielectric layer and is vertical to the plane of the first dielectric layer, and by optimizing the arrangement method of the metal patches in the conventional Vivaldi antenna, the current distribution on the surface of the Vivaldi antenna is changed, and the gain and the directionality of the high-frequency circularly polarized antenna are improved.
In conclusion, the invention has simple structure and reasonable design, two circularly polarized antennas which are respectively applied to the frequency bands of 0.8GHz-0.96GHz and 1.7GHz-2.7GHz are designed, and the effect of full-band coverage can be achieved by using the two circularly polarized antennas; the low-frequency circularly polarized antenna and the high-frequency circularly polarized antenna are used as array elements, two groups of L-shaped direction-finding arrays are respectively designed, and the problem of large size of the direction-finding arrays is solved.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the low-frequency circularly polarized antenna of the present invention.
Fig. 3 is a schematic structural diagram of an upper-layer microstrip antenna according to the present invention.
Fig. 4 is a schematic structural diagram of an intermediate-layer microstrip antenna according to the present invention.
Fig. 5 is a schematic structural diagram of a bottom microstrip antenna according to the present invention.
Fig. 6 is a schematic structural diagram of the feed network layer of the present invention.
Fig. 7 is a schematic structural diagram of the high-frequency circularly polarized antenna according to the present invention.
Fig. 8 is a schematic structural diagram of a first Vivaldi antenna array according to the present invention.
Fig. 9 is a schematic structural diagram of a second Vivaldi antenna element according to the present invention.
Description of reference numerals:
1-a low frequency circularly polarized antenna; 11-a ground plane; 12-upper microstrip antenna;
13-middle layer microstrip antenna; 14-bottom layer microstrip antenna; 15-feeding network layer;
2-high frequency circularly polarized antenna; 21-first Vivaldi antenna element;
22-a second Vivaldi antenna element; 211 — a first dielectric layer;
212 — a first lower formation layer; 213 — first upper metal layer; 214 — a first metal patch;
215 — a first circular stub; 216 — a first microstrip feed line; 221-a second dielectric layer;
222 — a second lower ground layer; 223 — a second upper metal layer; 224-a second metal patch;
225 — a second circular stub; 226 — a second microstrip feed line; 227-groove.
Detailed Description
The method of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments of the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 to 9, the present invention includes a low frequency antenna array for receiving 0.8GHz to 0.96GHz and a high frequency antenna array for receiving 1.7GHz to 2.7 GHz.
In practical use, the invention designs two circularly polarized antennas respectively applied to frequency bands of 0.8GHz-0.96GHz and 1.7GHz-2.7GHz, and the effect of full-band coverage can be achieved by using the two circularly polarized antennas simultaneously. The L-shaped antenna array is simple in structure and can measure the azimuth angle and the pitch angle of the incoming wave direction at the same time.
The low-frequency antenna array comprises a plurality of low-frequency circularly polarized antennas 1 which are arranged on the same horizontal plane in an L-shaped mode, and the high-frequency antenna array comprises a plurality of high-frequency circularly polarized antennas 2 which are arranged on the same horizontal plane in an L-shaped mode. The high-frequency antenna array is arranged at the position of the L-shaped notch of the low-frequency antenna array, the low-frequency circularly polarized antenna and the high-frequency circularly polarized antenna are used as array elements, two groups of L-shaped direction-finding arrays are respectively designed, the idle space of the L-shaped array of the low-frequency circularly polarized antenna is fully utilized for placing the high-frequency circularly polarized antenna, the space is saved, and the overall size of the direction-finding antenna is 290mm multiplied by 270mm multiplied by 300 mm. Therefore, the aim of direction finding of the full-band mobile communication signal is achieved, and the problems of large size and narrow bandwidth of a direction finding array are effectively solved.
In practical use, the number of the low-frequency circularly polarized antennas 1 is three, and the three low-frequency circularly polarized antennas 1 are respectively located at three vertexes of an isosceles triangle. The number of the high-frequency circularly polarized antennas 2 is three, and the three high-frequency circularly polarized antennas 2 are respectively positioned at three vertexes of another isosceles triangle. When the isosceles triangle is specifically implemented, the two isosceles triangles are isosceles right triangles, and the hypotenuse vertical lines of the two isosceles right triangles are parallel or overlapped.
The low-frequency circularly polarized antenna 1 comprises an upper layer microstrip antenna 12, a middle layer microstrip antenna 13, a bottom layer microstrip antenna 14, a feed network layer 15 and a ground plate 11.
In practical use, the size of the low-frequency circularly polarized antenna 1 is 0.22 λ × 0.22 λ × 0.09 λ. The low frequency circularly polarized antenna 1 of the present invention has a smaller horizontal size and antenna profile than other circularly polarized antennas. The antenna has certain advantages in terms of antenna design which is compatible with miniaturization and broadband.
The upper microstrip antenna 12 includes an upper microstrip patch having a corner cut and a central hole, and an upper dielectric substrate. The upper layer microstrip patch is square, the corner cut comprises two triangular corner cuts respectively positioned at two ends of a diagonal direction, and the central hole is a square hole positioned at the central position. The circular polarization characteristic of the low-frequency circular polarization antenna 1 is improved by using the mode of cutting the upper layer microstrip patch corner and opening the hole.
The middle layer microstrip antenna 13 comprises a middle layer microstrip patch and a middle layer medium substrate, wherein the middle layer microstrip patch is obliquely and symmetrically arranged. The center of the middle layer microstrip patch is provided with a connecting hole matched with the metal probe, the middle layer microstrip patch has the same size, the number of the middle layer microstrip patches is even, and the even number of the middle layer microstrip patches are obliquely and symmetrically arranged. When in actual use, the connecting hole is a round hole with the diameter of 1 mm. The coupling effect of the low-frequency circularly polarized antenna is enhanced by using a coupling feed mode, the impedance bandwidth of the low-frequency circularly polarized antenna is improved, and the gain of the low-frequency circularly polarized antenna is improved.
The bottom microstrip antenna 14 includes a bottom dielectric substrate and a metal conduction band etched on the bottom dielectric substrate. The metal conduction band is in a circular ring structure. The number of the bottom dielectric substrates is four, the four bottom dielectric substrates are enclosed to form square grooves, the four bottom dielectric substrates are rotationally symmetrical along the central axis of the square grooves, and the square grooves are respectively perpendicular to the upper microstrip antenna 12, the middle microstrip antenna 13 and the feed network layer 15. In practical use, the miniaturization of the horizontal size of the low-frequency circularly polarized antenna is realized by using a mode of loading the circular ring branches.
The bottom layer feed network layer 15 includes a feed dielectric substrate and a feed network circuit board, and the feed network circuit board includes a wilkinson power divider and a metal probe connected to an output port of the wilkinson power divider. When the power divider is actually used, the Wilkinson power divider is a single-stage Wilkinson power divider, and the Wilkinson power divider ensures the integration of the antenna. A schematic diagram of a microstrip line structure of the wilkinson power divider is shown in fig. 6, where the microstrip line includes a wide microstrip line and a narrow microstrip line, the wide microstrip line has a line width of 1.93mm, and the narrow microstrip line has a line width of 1.02 mm. The resistance of the isolation resistor R is 100 Ω. In order to ensure that the phase of the output circuit of the output port A is different from that of the output port B by 90 degrees, the distance from the output port A to the isolation resistor R is 46.6mm longer than that from the output port B to the isolation resistor R. In order to improve the transmission characteristics, the microstrip line is subjected to corner cutting, and the side length of the corner cutting is equal to the width of the microstrip line.
In practical use, the grounding plate 11 is located on the upper side of the power divider bottom feed network layer 15, so that the influence of the feed network circuit board on the radiation characteristic of the antenna can be effectively reduced, the grounding plate 11 is arranged around the low-frequency circularly polarized antenna 1, a reflection effect can be achieved, and the gain of the antenna can be increased to a certain extent.
The upper dielectric substrate, the middle dielectric substrate, the bottom dielectric substrate and the feeding dielectric substrate are FR-4 dielectric substrates.
The high frequency circularly polarised antenna 2 comprises a first Vivaldi antenna element 21 and a second Vivaldi antenna element 22, which are mutually orthogonal. In practical use, the first Vivaldi antenna array 21 and the second Vivaldi antenna array 22 are orthogonal to each other to form the high-frequency circularly polarized antenna 2, wherein the structures of the first Vivaldi antenna array 21 and the second Vivaldi antenna array 22 are basically the same, and the first Vivaldi antenna array is rotated by 90 degrees along the central axis to form the second Vivaldi antenna array; in contrast, the second dielectric layer 221 of the second Vivaldi antenna array is provided with a slot 227 into which the first dielectric layer 211 is inserted. The antenna profile is reduced by adopting a space folding mode, meanwhile, the broadband characteristic of the Vivaldi antenna is fully utilized, and the horizontal size of the antenna is reduced.
In this embodiment, the first Vivaldi antenna array 21 includes a first upper metal layer 213, a first lower ground layer 212, and a first dielectric layer 211 disposed between the first upper metal layer 213 and the first lower ground layer 212, where the first dielectric layer 211 is provided with a first microstrip feed line 216 and a first metal patch 214 connected to the first microstrip feed line 216, and the first metal patch 214 is bent to two ends of the first dielectric layer 211 and perpendicular to a plane where the first dielectric layer 211 is located.
The two ends of the first metal patch 214 extend out of the first dielectric layer 211 and are bent towards opposite directions respectively, the bent parts are bent towards two sides of the first dielectric layer 211 and are perpendicular to the plane of the first dielectric layer 211, the current distribution on the surface of the Vivaldi antenna is changed by optimizing the arrangement method of the metal patches in the conventional Vivaldi antenna, and the gain and the directionality of the high-frequency circularly polarized antenna are improved.
The first microstrip feed line 216 functions as a feed, and in order to improve the matching relationship of the first microstrip feed line 216, the first microstrip feed line 216 is terminated with a first circular stub 215.
In this embodiment, the second Vivaldi antenna array 22 includes a second upper metal layer 223, a second lower ground layer 222, and a second dielectric layer 221 disposed between the second upper metal layer 223 and the second lower ground layer 222, where the second dielectric layer 221 is provided with a second microstrip feed line 226 and a second metal patch 224 connected to the second microstrip feed line 226, the second metal patch 224 bends toward two ends of the second dielectric layer 221 and is perpendicular to a plane where the second dielectric layer 221 is located, and the second dielectric layer 221 is provided with a slot 227 into which the first dielectric layer 211 is inserted. The first microstrip feed line 216 terminates in a first circular stub 215.
The second Vivaldi antenna element 22 has a structure substantially the same as that of the first Vivaldi antenna element 21, and in order to achieve spatial orthogonality, a slot 227 into which the first dielectric layer 211 is inserted is formed in the second dielectric layer 221, and the slot has a width of 1 mm. Other structures not described in the second Vivaldi antenna element 22 and the first Vivaldi antenna element 21 may be conventional structures.
It should be noted that the first upper metal layer 213 and the second upper metal layer 223 are respectively provided with a feeding structure, and the feeding structure includes a feeding network having two stages of wilkinson power dividers. The output port of the feed structure on the first upper metal layer 213 is connected to the metal via on the first dielectric layer 211. The output port of the feeding structure on the second upper metal layer 223 is connected to the metal via on the second dielectric layer 221.
The first dielectric layer 211 and the second dielectric layer 221 are both FR-4 dielectric substrates or F4B-2 dielectric substrates.
The above embodiments are only examples of the present invention, and are not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. A multi-standard mobile communication signal direction-finding antenna is characterized in that: the antenna comprises a low-frequency antenna array for receiving 0.8GHz-0.96GHz and a high-frequency antenna array for receiving 1.7GHz-2.7 GHz;
the low-frequency antenna array comprises a plurality of low-frequency circularly polarized antennas (1) which are arranged on the same horizontal plane in an L shape, each low-frequency circularly polarized antenna (1) comprises an upper micro-strip antenna (12), a middle micro-strip antenna (13), a bottom micro-strip antenna (14), a feed network layer (15) and a ground plate (11), each upper micro-strip antenna (12) comprises an upper micro-strip patch and an upper dielectric substrate, each upper micro-strip patch is provided with a cutting angle and a central hole, each middle micro-strip antenna (13) comprises a middle micro-strip patch and a middle dielectric substrate, the middle micro-strip patches are obliquely and symmetrically arranged, each bottom micro-strip antenna (14) comprises a bottom dielectric substrate and a metal conduction band etched on the bottom dielectric substrate, each bottom feed network layer (15) comprises a feed dielectric substrate and a feed network circuit board, each feed network circuit board comprises a Wilkinson power divider and a metal probe connected with a Wilkinson power divider output port (ii) a
The high-frequency antenna array comprises a plurality of high-frequency circularly polarized antennas (2) which are arranged on the same horizontal plane in an L-shaped manner; the high frequency circularly polarized antenna (2) comprises a first Vivaldi antenna element (21) and a second Vivaldi antenna element (22) which are orthogonal to each other.
2. A multi-standard mobile communication signal direction-finding antenna according to claim 1, characterized in that: the first Vivaldi antenna array (21) comprises a first upper metal layer (213), a first lower ground layer (212) and a first medium layer (211) arranged between the first upper metal layer (213) and the first lower ground layer (212), the first medium layer (211) is provided with a first microstrip feed line (216) and a first metal patch (214) connected with the first microstrip feed line (216), and the first metal patch (214) bends to two ends of the first medium layer (211) and is perpendicular to the plane of the medium layer (211);
the second Vivaldi antenna array (22) comprises a second upper metal layer (223), a second lower ground layer (222) and a second medium layer (221) arranged between the second upper metal layer (223) and the second lower ground layer (222), the second medium layer (221) is provided with a second microstrip feed line (226) and a second metal patch (224) connected with the second microstrip feed line (226), the second metal patch (224) bends to two ends of the second medium layer (221) and is perpendicular to the plane of the medium layer where the second medium layer (221) is located, and a slot (227) for the first medium layer (211) to insert is formed in the second medium layer (221).
3. A multi-standard mobile communication signal direction-finding antenna according to claim 1, characterized in that: the number of the low-frequency circularly polarized antennas (1) is three, and the three low-frequency circularly polarized antennas (1) are respectively located at three vertexes of an isosceles triangle.
4. A multi-standard mobile communication signal direction-finding antenna according to claim 1, characterized in that: the number of the high-frequency circularly polarized antennas (2) is three, and the three high-frequency circularly polarized antennas (2) are respectively positioned at three vertexes of an isosceles triangle.
5. A multi-standard mobile communication signal direction-finding antenna according to claim 1, characterized in that: the upper layer microstrip patch is square, the corner cut comprises two triangular corner cuts respectively positioned at two ends of a diagonal direction, and the central hole is a square hole positioned at the central position.
6. A multi-standard mobile communication signal direction-finding antenna according to claim 1, characterized in that: the center of the middle layer microstrip patch is provided with a connecting hole matched with the metal probe, the middle layer microstrip patch has the same size, the number of the middle layer microstrip patches is even, and the even number of the middle layer microstrip patches are obliquely and symmetrically arranged.
7. A multi-standard mobile communication signal direction-finding antenna according to claim 1, characterized in that: the number of the bottom dielectric substrates is four, the bottom dielectric substrates are enclosed to form square grooves, the four bottom dielectric substrates are rotationally symmetrical along the central axis of the square grooves, and the square grooves are respectively perpendicular to the upper-layer microstrip antenna (12), the middle-layer microstrip antenna (13) and the feed network layer (15).
8. A multi-standard mobile communication signal direction-finding antenna according to claim 1, characterized in that: the metal conduction band is in a circular ring structure.
9. A multi-standard mobile communication signal direction-finding antenna according to claim 1, characterized in that: the first upper metal layer (213) and the second upper metal layer (233) are respectively provided with a feed structure, and the feed structure comprises a feed network with two stages of Wilkinson power dividers.
10. A multi-standard mobile communication signal direction-finding antenna according to claim 2, characterized in that: the first microstrip feed line (216) terminates in a first circular stub (215).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010384627.7A CN111600137A (en) | 2020-05-09 | 2020-05-09 | Multi-standard mobile communication signal direction-finding antenna |
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| CN202010384627.7A CN111600137A (en) | 2020-05-09 | 2020-05-09 | Multi-standard mobile communication signal direction-finding antenna |
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| CN111600137A true CN111600137A (en) | 2020-08-28 |
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| CN202010384627.7A Pending CN111600137A (en) | 2020-05-09 | 2020-05-09 | Multi-standard mobile communication signal direction-finding antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113629382A (en) * | 2021-07-29 | 2021-11-09 | 中信科移动通信技术股份有限公司 | Multiport base station antenna |
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2020
- 2020-05-09 CN CN202010384627.7A patent/CN111600137A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113629382A (en) * | 2021-07-29 | 2021-11-09 | 中信科移动通信技术股份有限公司 | Multiport base station antenna |
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