CN112152656B - Intelligent antenna system - Google Patents
Intelligent antenna system Download PDFInfo
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- CN112152656B CN112152656B CN202010846764.8A CN202010846764A CN112152656B CN 112152656 B CN112152656 B CN 112152656B CN 202010846764 A CN202010846764 A CN 202010846764A CN 112152656 B CN112152656 B CN 112152656B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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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
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/104—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces using a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/20—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a curvilinear path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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Abstract
The invention discloses an intelligent antenna system, which comprises an information acquisition and processing unit, an antenna array and an antenna housing, wherein the information acquisition and processing unit and the antenna array are positioned in the antenna housing and are respectively installed on the antenna housing, the antenna array comprises 8 antennas with the same structure, the 8 antennas are sequentially connected end to end along a circle to form an octagonal inner ring, the information acquisition and processing unit comprises an SP8T radio frequency switch, a low noise amplifier, a power amplifier, a terminal radio frequency baseband module, a WIFI module, a GPS positioning module and an electronic compass module, the GPS positioning module and the electronic compass module position a mobile terminal device to determine an angle between the mobile terminal device and a target base station, and then determine the working state of the SP8T radio frequency switch, so that electromagnetic waves transmitted in the antenna array are radiated to an antenna at the position of the target base station to be switched into the working state; the method has the advantages of high reliability, low design difficulty and design cost, high gain and high phase switching precision.
Description
Technical Field
The present invention relates to antenna systems, and more particularly, to an intelligent antenna system.
Background
In special application scenarios such as high-speed trains, vehicles and ships, a mobile terminal device needs to be equipped to establish connection with a target base station to enable communication between a mobile terminal user and each mobile terminal user outside. The antenna is one of core devices of the mobile terminal equipment, and the electromagnetic waves emitted by the antenna can be always radiated to a target base station to ensure that the mobile terminal user keeps contact with each mobile terminal user outside. The position and state of the mobile terminal user are not constant, the position and state of the mobile terminal device will change with the mobile terminal user, and the relative position of the mobile terminal device and the target base station will change accordingly. If the antenna of the mobile terminal equipment can be ensured to only radiate towards the target base station all the time, the communication efficiency of the mobile terminal equipment can be improved to the greatest extent, and the power consumption of the antenna in the mobile terminal equipment is reduced. To achieve the above object, the phase of the electromagnetic wave beam provided by the mobile terminal device needs to be adaptively adjustable as the position and state of the mobile terminal device change. As is well known, the current antenna only has a function of radiating electromagnetic waves, and cannot sense environmental changes to automatically adjust the phase of the antenna to adjust the phase of the electromagnetic wave beam. How to achieve automatic adjustment of antenna phase in mobile terminal equipment has become a current research focus.
Researchers have developed smart antenna systems that enable automatic adjustment of the phase of an electromagnetic wave beam. The existing intelligent antenna system mainly has two types: a communication-in-motion antenna system and an LTE (Long Term evolution) intelligent antenna system. The communication-in-motion antenna system works by combining a parabolic antenna or a flat plate array antenna with a servo driving system, and the servo driving system drives the parabolic antenna or the flat plate array antenna to search and track signals. Although the communication-in-motion antenna system is low in design difficulty and design cost and high in antenna gain, the servo driving system needs structural members such as a servo motor (a stepping motor), a synchronous wheel and a synchronous belt, so that the antenna is worn and failed frequently in long-term operation, the reliability is poor, the servo motor controls the radiation direction of the parabolic antenna or the flat plate array antenna, the radiation direction of the antenna cannot be accurately aligned to a target base station due to unavoidable errors between software and hardware, and the phase switching precision is low. The LTE intelligent antenna system controls the radiation direction of the antenna to work by carrying out beam forming through the feed network, although the reliability and the phase switching precision are higher, the beam forming can cause the loss of antenna gain and influence the performance of the antenna, the feed network capable of carrying out the beam forming is more complex, and the design difficulty and the design cost are higher.
Disclosure of Invention
The invention aims to solve the technical problem of providing an intelligent antenna system which has high reliability, lower design difficulty and design cost, higher gain and higher phase switching precision.
The technical scheme adopted by the invention for solving the technical problems is as follows: an intelligent antenna system comprises an information acquisition and processing unit, an antenna array and an antenna housing, wherein the information acquisition and processing unit and the antenna array are positioned in the antenna housing and are respectively installed on the antenna housing, the antenna array comprises 8 antennas with the same structure, 8 antennas are sequentially connected end to end along a circle to form an octagonal inner ring, the information acquisition and processing unit is positioned in the octagonal inner ring, the information acquisition and processing unit comprises an SP8T radio frequency switch, a low noise amplifier, a power amplifier, a terminal radio frequency baseband module, a WIFI module, a GPS positioning module and an electronic compass module, the SP8T radio frequency switch is respectively connected with the low noise amplifier, the power amplifier and 8 antennas, the low noise amplifier and the power amplifier are respectively connected with the terminal radio frequency baseband module, the terminal radio frequency baseband module is respectively connected with the WIFI module, the GPS positioning module and the electronic compass module, when the mobile terminal equipment is in a working state, the GPS positioning module and the electronic compass module position the mobile terminal equipment in real time and send real-time positioning information to the terminal radio frequency baseband module, the terminal radio frequency baseband module determines the angle between the mobile terminal equipment and a target base station according to the position information of the target base station in the terminal radio frequency baseband module and the real-time positioning information of the mobile terminal equipment, determines the working state of the SP8T radio frequency switch based on the angle between the mobile terminal equipment and the target base station, then generates a working state signal and sends the working state signal to the power amplifier, and the power amplifier amplifies the working state signal and sends the working state signal to the SP8T radio frequency switch, the SP8T radio frequency switch accesses a corresponding antenna in the antenna array into the information acquisition processing unit based on a working state signal, electromagnetic waves emitted by the antenna after entering the working state are radiated to the position of a target base station, the self-adaptive adjustment of the phase of the electromagnetic waves is realized, when a mobile terminal user sends a signal outwards, the signal enters the terminal radio frequency baseband module through the WIFI module, enters the antenna array through the SP8T radio frequency switch after being amplified by the power amplifier, and is sent out by one antenna currently in the working state; when a mobile terminal user receives an external signal, one antenna in a working state in the antenna array sends the external signal to the low noise amplifier through the SP8T radio frequency switch to be subjected to signal amplification and noise removal processing, then the external signal is input to the terminal radio frequency baseband module, and finally the external signal is sent to the mobile terminal user through the WIFI module.
Each antenna comprises a cuboid-shaped dielectric substrate, a micro-strip radiation patch, a cuboid-shaped metal reflecting plate, a feed connector and a coaxial line, wherein the dielectric substrate is made of FR4 with the dielectric constant of 4.4, the length of the long side of the dielectric substrate is 100mm, the length of the wide side of the dielectric substrate is 70mm, the thickness of the dielectric substrate is 1mm, the wide side of the dielectric substrate is vertical, the long side of the dielectric substrate is horizontal, the metal reflecting plate is a copper plate, the lengths of the long side and the wide side of the metal reflecting plate are both 100mm, the inner octagonal ring is used as the inner side, the metal reflecting plate is positioned on the inner side of the dielectric substrate, the metal reflecting plate is parallel to the dielectric substrate, the distance between the metal reflecting plate and the dielectric substrate is 0.7 lambda, lambda is the free space wavelength of electromagnetic waves in the working frequency band, the wide side of the metal reflecting plate is vertical, the long side of the metal reflecting plate is horizontal, and the central axis of the metal reflecting plate is superposed with the dielectric substrate, the microstrip radiation patch comprises a copper foil layer attached to the outer side surface of the dielectric substrate, the left end surface of the copper foil layer is flush with the left end surface of the dielectric substrate, the right end surface of the copper foil layer is flush with the right end surface of the dielectric substrate, the distance between the plane of the upper end surface of the copper foil layer and the plane of the upper end surface of the dielectric substrate is 5mm, the distance between the plane of the lower end surface of the copper foil layer and the plane of the lower end surface of the dielectric substrate is 5mm, the thickness of the copper foil layer is 0.018mm, the copper foil layer is provided with a first rectangular radiation groove, a second rectangular radiation groove and a third rectangular radiation groove which are sequentially communicated, and the outer side surface of the dielectric substrate is exposed at the first rectangular radiation groove, the second rectangular radiation groove and the third rectangular radiation groove, the first rectangular radiation groove and the second rectangular radiation groove are positioned below the third rectangular radiation groove, the distance between the plane of the upper end face of the third rectangular radiation groove and the plane of the upper end face of the copper foil layer is 11.4mm, the distance between the plane of the left end face of the third rectangular radiation groove and the plane of the left end face of the copper foil layer is 35mm, the distance between the plane of the right end face of the third rectangular radiation groove and the plane of the right end face of the copper foil layer is 35mm, the upper end face of the first rectangular radiation groove is connected with the lower end face of the third rectangular radiation groove, the distance between the plane of the lower end face of the first rectangular radiation groove and the plane of the lower end face of the copper foil layer is 3.6mm, and the distance between the plane of the right end face of the first rectangular radiation groove and the plane of the right end face of the copper foil layer is 35mm, the distance between the left end face of the first rectangular radiation groove and the right end face thereof is 7.8mm, the distance between the plane of the lower end face of the second rectangular radiation groove and the plane of the lower end face of the copper foil layer is 3.6mm, the distance between the plane of the left end face of the second rectangular radiation groove and the plane of the left end face of the copper foil layer is 35mm, the distance between the left end face of the second rectangular radiation groove and the right end face thereof is 7.8mm, the dielectric substrate and the metal reflection plate are connected by the coaxial line, two ends of the coaxial line are respectively located at the centers of the dielectric substrate and the metal reflection plate, the feed connector is located and connected with one end of the octagonal coaxial line, the feed connector is located in the inner ring, and is connected with the SP8T radio frequency switch. In the structure, a dielectric substrate is made of FR4 with the dielectric constant of 4.4, the cost of each antenna is very low, a new resonance point of the antenna can be expanded at low frequency by loading three rectangular radiation slots on a copper foil layer, the purpose of reducing the size of the antenna can be realized by moving the resonance point at the low frequency to a working frequency band, the gain of the antenna is improved by loading a cuboid-shaped metal reflecting plate, the gain of each antenna can reach 9.52dB, the gain compression point in the horizontal direction is 46 degrees, therefore, a horizontal plane of 360 degrees can be completely covered by the combination of 8 antennas, and a servo system and a beam-forming feed network do not need to be added.
The feed connector is an SMA connector, the radome is cylindrical, is made of ASA plastic, and has an outer diameter of 172mm, a length of 140mm and a wall thickness of 2 mm.
Compared with the prior art, the invention has the advantages that an intelligent antenna system is constructed by the information acquisition and processing unit, the antenna array and the antenna housing, the information acquisition and processing unit and the antenna array are positioned in the antenna housing and are respectively installed on the antenna housing, the antenna array comprises 8 antennas with the same structure, the 8 antennas are sequentially connected end to end along a circle to form an octagonal inner ring, the information acquisition and processing unit is positioned in the octagonal inner ring, the information acquisition and processing unit comprises an SP8T radio frequency switch, a low noise amplifier, a power amplifier, a terminal radio frequency baseband module, a WIFI module, a GPS positioning module and an electronic compass module, the SP8T radio frequency switch is respectively connected with the low noise amplifier, the power amplifier and the 8 antennas, the low noise amplifier and the power amplifier are respectively connected with the terminal radio frequency baseband module, the terminal radio frequency baseband module is respectively connected with the WIFI module, the GPS positioning module and the electronic compass module, when the mobile terminal equipment is in a working state, the GPS positioning module and the electronic compass module position the mobile terminal equipment in real time and send real-time positioning information to the terminal radio frequency baseband module, the terminal radio frequency baseband module determines the angle between the mobile terminal equipment and a target base station according to the position information of the target base station carried in the terminal radio frequency baseband module and the real-time positioning information of the mobile terminal equipment, determines the working state of an SP8T radio frequency switch based on the angle between the mobile terminal equipment and the target base station, then generates a working state signal and sends the working state signal to a power amplifier, the power amplifier amplifies the working state signal and sends the amplified working state signal to the SP8T radio frequency switch, the SP8T radio frequency switch accesses a corresponding antenna in an antenna array into an information acquisition processing unit based on the working state signal, and the electromagnetic wave emitted by the antenna after entering the working state is radiated to the position of the target base station, the self-adaptive adjustment of the electromagnetic wave phase is realized, when a mobile terminal user sends a signal outwards, the signal enters a terminal radio frequency baseband module through a WIFI module, is amplified through a power amplifier, enters an antenna array through an SP8T radio frequency switch, and is sent out by one antenna in the current working state; when a mobile terminal user receives an external signal, one antenna in a working state in an antenna array sends the external signal to a low-noise amplifier through an SP8T radio frequency switch to be subjected to signal amplification and noise removal processing, then the external signal is input to a terminal radio frequency baseband module, and finally the external signal is sent to the mobile terminal user through a WIFI module, so that the angle between the mobile terminal device and a target base station is determined after the mobile terminal device is positioned, the working state of an SP8T radio frequency switch is determined according to the angle between the mobile terminal device and the target base station, the SP8T radio frequency switch is switched, and an antenna in the antenna array matched with the direction of the target base station is accessed to an information acquisition processing unit to realize the self-adaptive adjustment of the electromagnetic wave phase. The reliability of the system is improved, meanwhile, after a feed network used for beam forming is removed, the complexity of the system is greatly simplified, the direction of electromagnetic wave beams is changed by switching the antenna array through the SP8T radio frequency switch, the phase switching precision is high, the directional diagram design problem of the omni-directional plane is simplified to a plane, the gain loss caused by the forming is avoided, the design difficulty and the design cost are low, and the gain is high.
Drawings
FIG. 1 is a block diagram of a smart antenna system of the present invention;
FIG. 2 is a perspective view of an antenna array of the smart antenna system of the present invention;
FIG. 3 is a front view of one antenna of the antenna array of the smart antenna system of the present invention;
FIG. 4 is a side view of one antenna of the antenna array of the smart antenna system of the present invention;
fig. 5 is a horizontal directional diagram of an antenna in the antenna array of the smart antenna system of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
Example (b): as shown in fig. 1, an intelligent antenna system comprises an information acquisition processing unit, an antenna array and an antenna housing, wherein the information acquisition processing unit and the antenna array are positioned inside the antenna housing and are respectively installed on the antenna housing, the antenna array comprises 8 antennas 1 with the same structure, the 8 antennas 1 are sequentially connected end to end along a circle to form an octagonal inner ring 2, the information acquisition processing unit is positioned in the octagonal inner ring 2, the information acquisition processing unit comprises an SP8T radio frequency switch, a low noise amplifier, a power amplifier, a terminal radio frequency baseband module, a WIFI module, a GPS positioning module and an electronic compass module, the SP8T radio frequency switch is respectively connected with the low noise amplifier, the power amplifier and the 8 antennas 1, the low noise amplifier and the power amplifier are respectively connected with the terminal radio frequency baseband module, the terminal radio frequency baseband module is respectively connected with the WIFI module, the GPS positioning module and the electronic compass module, when the mobile terminal equipment is in a working state, the GPS positioning module and the electronic compass module position the mobile terminal equipment in real time and send real-time positioning information to the terminal radio frequency baseband module, the terminal radio frequency baseband module determines the angle between the mobile terminal equipment and a target base station according to the position information of the target base station carried in the terminal radio frequency baseband module and the real-time positioning information of the mobile terminal equipment, determines the working state of an SP8T radio frequency switch based on the angle between the mobile terminal equipment and the target base station, then generates a working state signal and sends the working state signal to a power amplifier, the power amplifier amplifies the working state signal and sends the amplified working state signal to the SP8T radio frequency switch, the SP8T radio frequency switch connects a corresponding antenna 1 in an antenna array into an information acquisition processing unit based on the working state signal, and the electromagnetic wave emitted after the antenna 1 enters the working state is radiated to the position of the target base station, the self-adaptive adjustment of the electromagnetic wave phase is realized, when a mobile terminal user sends a signal outwards, the signal enters a terminal radio frequency baseband module through a WIFI module, is amplified through a power amplifier, enters an antenna array through an SP8T radio frequency switch, and is sent out by one antenna 1 in the current working state; when a mobile terminal user receives an external signal, one antenna 1 in a working state in the antenna array sends the external signal to a low noise amplifier through an SP8T radio frequency switch to be subjected to signal amplification and noise removal processing, then the external signal is input to a terminal radio frequency baseband module, and finally the external signal is sent to the mobile terminal user through a WIFI module.
As shown in fig. 2, 3 and 4, in the present embodiment, each antenna 1 includes a dielectric substrate 3 in a rectangular parallelepiped shape, a microstrip radiation patch, a metal reflector 4 in a rectangular parallelepiped shape, a feed connector 5 and a coaxial line 6, the dielectric substrate 3 is made of FR4 having a dielectric constant of 4.4, and has a long side length of 100mm, a wide side length of 70mm and a thickness of 1mm, a wide side of the dielectric substrate 3 is vertical and a long side length is horizontal, the metal reflector 4 is a copper plate, both the long side length and the wide side length of the metal reflector 4 are 100mm, the octagonal inner ring 2 is used as an inner side, the metal reflector 4 is located on the inner side of the dielectric substrate 3, the metal reflector 4 is parallel to the dielectric substrate 3, and the distance between the two is 0.7 λ, λ is a free space wavelength of electromagnetic waves in an operating frequency band, the wide side of the metal reflector 4 is vertical and the long side length is horizontal, the metal reflector 4 coincides with a central axis of the dielectric substrate 3, the microstrip radiation patch comprises a copper foil layer 7 attached to the outer side surface of a dielectric substrate 3, the left end surface of the copper foil layer 7 is flush with the left end surface of the dielectric substrate 3, the right end surface of the copper foil layer 7 is flush with the right end surface of the dielectric substrate 3, the distance between the plane of the upper end surface of the copper foil layer 7 and the plane of the upper end surface of the dielectric substrate 3 is 5mm, the distance between the plane of the lower end surface of the copper foil layer 7 and the plane of the lower end surface of the dielectric substrate 3 is 5mm, the thickness of the copper foil layer 7 is 0.018mm, the copper foil layer 7 is provided with a first rectangular radiation slot 8, a second rectangular radiation slot 9 and a third rectangular radiation slot 10 which are sequentially communicated, the outer side surface of the dielectric substrate 3 is exposed at the first rectangular radiation slot 8, the second rectangular radiation slot 9 and the third rectangular radiation slot 10, the first rectangular radiation slot 8 and the second rectangular radiation slot 9 are positioned below the third rectangular radiation slot 10, the distance between the plane of the upper end face of the third rectangular radiation groove 10 and the plane of the upper end face of the copper foil layer 7 is 11.4mm, the distance between the plane of the left end face of the third rectangular radiation groove 10 and the plane of the left end face of the copper foil layer 7 is 35mm, the distance between the plane of the right end face of the third rectangular radiation groove 10 and the plane of the right end face of the copper foil layer 7 is 35mm, the upper end face of the first rectangular radiation groove 8 is connected with the lower end face of the third rectangular radiation groove 10, the distance between the plane of the lower end face of the first rectangular radiation groove 8 and the plane of the lower end face of the copper foil layer 7 is 3.6mm, the distance between the plane of the right end face of the first rectangular radiation groove 8 and the plane of the right end face of the copper foil layer 7 is 35mm, the distance between the left end face of the first rectangular radiation groove 8 and the right end face thereof is 7.8mm, the upper end face of the second rectangular radiation groove 9 is connected with the lower end face of the third rectangular radiation groove 10, the distance between the plane of the lower end face of the second rectangular radiation groove 9 and the plane of the lower end face of the copper foil layer 7 is 3.6mm, the distance between the plane of the left end face of the second rectangular radiation groove 9 and the plane of the left end face of the copper foil layer 7 is 35mm, the distance between the left end face of the second rectangular radiation groove 9 and the right end face of the second rectangular radiation groove is 7.8mm, the dielectric substrate 3 is connected with the metal reflection plate 4 through the coaxial line 6, the two ends of the coaxial line 6 are respectively located at the centers of the dielectric substrate 3 and the metal reflection plate 4, the feed connector 5 is located and connected with one end of the coaxial line 6, and the feed connector 5 is located in the octagonal inner ring 2 and connected with the SP8T radio frequency switch.
In this embodiment, the feed connector 5 is an SMA connector, the radome is cylindrical, is made of ASA plastic, and has an outer diameter of 172mm, a length of 140mm, and a wall thickness of 2 mm.
An antenna in the antenna array of the smart antenna system of the present invention was simulated with the horizontal pattern as shown in fig. 5. Analysis of FIG. 5 reveals that: a 1.5dB drop in antenna gain can cover a range of 46 deg. horizontally. Therefore, the 8 antennas of the antenna array can realize 360-degree full coverage in the horizontal direction.
Claims (2)
1. An intelligent antenna system is characterized by comprising an information acquisition and processing unit, an antenna array and an antenna housing, wherein the information acquisition and processing unit and the antenna array are positioned in the antenna housing and are respectively installed on the antenna housing, the antenna array comprises 8 antennas with the same structure, 8 antennas are sequentially connected end to end along a circle to form an octagonal inner ring, the information acquisition and processing unit is positioned in the octagonal inner ring, the information acquisition and processing unit comprises an SP8T radio frequency switch, a low noise amplifier, a power amplifier, a terminal radio frequency baseband module, a WIFI module, a GPS positioning module and an electronic compass module, the SP8T radio frequency switch is respectively connected with the low noise amplifier, the power amplifier and 8 antennas, the low noise amplifier and the power amplifier are respectively connected with the terminal radio frequency baseband module, the terminal radio frequency baseband module is respectively connected with the WIFI module, the GPS positioning module and the electronic compass module, when the mobile terminal equipment is in a working state, the GPS positioning module and the electronic compass module position the mobile terminal equipment in real time and send real-time positioning information to the terminal radio frequency baseband module, the terminal radio frequency baseband module determines the angle between the mobile terminal equipment and a target base station according to the position information of the target base station in the terminal radio frequency baseband module and the real-time positioning information of the mobile terminal equipment, determines the working state of the SP8T radio frequency switch based on the angle between the mobile terminal equipment and the target base station, then generates a working state signal and sends the working state signal to the power amplifier, and the power amplifier amplifies the working state signal and sends the working state signal to the SP8T radio frequency switch, the SP8T radio frequency switch accesses a corresponding antenna in the antenna array into the information acquisition processing unit based on a working state signal, electromagnetic waves emitted by the antenna after entering the working state are radiated to the position of a target base station, the self-adaptive adjustment of the phase of the electromagnetic waves is realized, when a mobile terminal user sends a signal outwards, the signal enters the terminal radio frequency baseband module through the WIFI module, enters the antenna array through the SP8T radio frequency switch after being amplified by the power amplifier, and is sent out by one antenna currently in the working state; when a mobile terminal user receives an external signal, one antenna in a working state in the antenna array sends the external signal to the low noise amplifier through the SP8T radio frequency switch for signal amplification and noise removal, then inputs the signal into the terminal radio frequency baseband module, and finally sends the signal to the mobile terminal user through the WIFI module;
each antenna comprises a cuboid-shaped dielectric substrate, a micro-strip radiation patch, a cuboid-shaped metal reflecting plate, a feed connector and a coaxial line, wherein the dielectric substrate is made of FR4 with the dielectric constant of 4.4, the length of the long side of the dielectric substrate is 100mm, the length of the wide side of the dielectric substrate is 70mm, the thickness of the dielectric substrate is 1mm, the wide side of the dielectric substrate is vertical, the long side of the dielectric substrate is horizontal, the metal reflecting plate is a copper plate, the lengths of the long side and the wide side of the metal reflecting plate are both 100mm, the inner octagonal ring is used as the inner side, the metal reflecting plate is positioned on the inner side of the dielectric substrate, the metal reflecting plate is parallel to the dielectric substrate, the distance between the metal reflecting plate and the dielectric substrate is 0.7 lambda, lambda is the free space wavelength of electromagnetic waves in the working frequency band, the wide side of the metal reflecting plate is vertical, the long side of the metal reflecting plate is horizontal, and the central axis of the metal reflecting plate is superposed with the dielectric substrate, the microstrip radiation patch comprises a copper foil layer attached to the outer side surface of the dielectric substrate, the left end surface of the copper foil layer is flush with the left end surface of the dielectric substrate, the right end surface of the copper foil layer is flush with the right end surface of the dielectric substrate, the distance between the plane of the upper end surface of the copper foil layer and the plane of the upper end surface of the dielectric substrate is 5mm, the distance between the plane of the lower end surface of the copper foil layer and the plane of the lower end surface of the dielectric substrate is 5mm, the thickness of the copper foil layer is 0.018mm, the copper foil layer is provided with a first rectangular radiation groove, a second rectangular radiation groove and a third rectangular radiation groove which are sequentially communicated, and the outer side surface of the dielectric substrate is exposed at the first rectangular radiation groove, the second rectangular radiation groove and the third rectangular radiation groove, the first rectangular radiation groove and the second rectangular radiation groove are positioned below the third rectangular radiation groove, the distance between the plane of the upper end face of the third rectangular radiation groove and the plane of the upper end face of the copper foil layer is 11.4mm, the distance between the plane of the left end face of the third rectangular radiation groove and the plane of the left end face of the copper foil layer is 35mm, the distance between the plane of the right end face of the third rectangular radiation groove and the plane of the right end face of the copper foil layer is 35mm, the upper end face of the first rectangular radiation groove is connected with the lower end face of the third rectangular radiation groove, the distance between the plane of the lower end face of the first rectangular radiation groove and the plane of the lower end face of the copper foil layer is 3.6mm, and the distance between the plane of the right end face of the first rectangular radiation groove and the plane of the right end face of the copper foil layer is 35mm, the distance between the left end face of the first rectangular radiation groove and the right end face thereof is 7.8mm, the distance between the plane of the lower end face of the second rectangular radiation groove and the plane of the lower end face of the copper foil layer is 3.6mm, the distance between the plane of the left end face of the second rectangular radiation groove and the plane of the left end face of the copper foil layer is 35mm, the distance between the left end face of the second rectangular radiation groove and the right end face thereof is 7.8mm, the dielectric substrate and the metal reflection plate are connected by the coaxial line, two ends of the coaxial line are respectively located at the centers of the dielectric substrate and the metal reflection plate, the feed connector is located and connected with one end of the octagonal coaxial line, the feed connector is located in the inner ring, and is connected with the SP8T radio frequency switch.
2. A smart antenna system according to claim 1, wherein the feed connection is an SMA connection, the radome is cylindrical in shape and is made of ASA plastic, having an outer diameter of 172mm, a length of 140mm and a wall thickness of 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN102428607A (en) * | 2009-05-21 | 2012-04-25 | 中兴通讯股份有限公司 | Automatically directing apparatus and method for communication antenna |
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| CN103618559B (en) * | 2013-11-28 | 2015-10-21 | 西安烽火电子科技有限责任公司 | A kind of radio frequency front-end device based on directional antenna and communication control method thereof |
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| CN102428607A (en) * | 2009-05-21 | 2012-04-25 | 中兴通讯股份有限公司 | Automatically directing apparatus and method for communication antenna |
| CN105703083A (en) * | 2016-04-26 | 2016-06-22 | 深圳前海智讯中联科技有限公司 | Multi-beam selection smart antenna array and system having antenna array |
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