CN109802218B - Miniaturized antenna applied to D2D communication technology in 5G communication - Google Patents
Miniaturized antenna applied to D2D communication technology in 5G communication Download PDFInfo
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- CN109802218B CN109802218B CN201910236804.4A CN201910236804A CN109802218B CN 109802218 B CN109802218 B CN 109802218B CN 201910236804 A CN201910236804 A CN 201910236804A CN 109802218 B CN109802218 B CN 109802218B
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Abstract
The invention discloses a miniaturized antenna applied to a D2D communication technology in 5G communication, and relates to the technical field of 5G communication antennas, in particular to an upright post and a folding telescopic mechanism, wherein a mounting sleeve is embedded and mounted on the outer side of the upright post, a base is fixedly connected to the outer side of the mounting sleeve, a fixed seat is mounted above the base, a mounting seat is connected to the outer side of the fixed seat, a lifting adjusting mechanism is mounted above the mounting seat, a protective shell is connected above the lifting adjusting mechanism, a solar cell panel is mounted on the outer side of the protective shell, a top cover is arranged above the protective shell, and a sealing sleeve is arranged in the middle of the top cover. This be applied to miniaturized antenna of D2D communication technology in 5G communication, can wrap up the protection with the device major structure through the protective housing, when abominable antenna or environment appear, the protective housing can protect the device, prevents that external environment from damaging the device major structure, is favorable to improving the reliability of device.
Description
Technical Field
The invention relates to the technical field of 5G communication antennas, in particular to a miniaturized antenna applied to a D2D communication technology in 5G communication.
Background
The fifth generation mobile communication technology is oriented to a new generation mobile communication system after 2020, according to the development rule of mobile communication, 5G will have ultrahigh spectrum utilization rate and energy efficiency, a network system and a wireless transmission technology of wireless mobile communication can be further improved, infinite space dimension resources are mined, and the effectiveness of power efficiency and the spectrum efficiency are improved by using a multi-antenna transmission and multi-antenna reception technology as a key candidate technology oriented to 5G.
Because the device-to-device communication is essentially point-to-point transmission, a large number of communication antennas are required to be built to provide enough information transmission quantity, the common communication antenna is complex in structure, high in power and large in occupied volume and is not suitable for device-to-device communication, meanwhile, the common communication antenna needs stable power supply, signals disappear after a circuit is broken, the reliability is low, the communication antenna is precise in structure, and when the communication antenna is in a severe environment, the common communication antenna is exposed outside and is easily damaged by the influence of the external environment, and the safety is low.
The utility model discloses a 5G antenna with heat dissipation and waterproof performance that discloses in china utility model patent application publication specification CN207868374U, this 5G antenna, though add radiator unit and waterproof component on antenna housing, utilize radiator unit to come to dispel the heat to the antenna, ensure that it has fine radiating effect, and waterproof component's setting, make the antenna have fine water-proof effects, thereby effectively avoid getting into the inside normal work that influences inside device of antenna housing because of antenna housing's surperficial ponding, however, this 5G antenna does not possess beta structure, and the volume is great, and do not possess reserve power supply facility, do not have external protection mechanism simultaneously, have the shortcoming that the reliability of use is lower.
Disclosure of Invention
In view of the defects in the prior art, the invention provides a miniaturized antenna applied to the D2D communication technology in 5G communication, which solves the problems in the background art mentioned above.
In order to achieve the purpose, the invention is realized by the following technical scheme: a miniaturized antenna applied to a D2D communication technology in 5G communication comprises a stand column and a folding telescopic mechanism, wherein a mounting sleeve is nested and mounted on the outer side of the stand column, a base is fixedly connected to the outer side of the mounting sleeve, a fixed seat is mounted above the base, the outer side of the fixed seat is connected with a mounting seat, a lifting adjusting mechanism is mounted above the mounting seat, a protective shell is connected above the lifting adjusting mechanism, a solar cell panel is mounted on the outer side of the protective shell, a top cover is arranged above the protective shell, a sealing sleeve is arranged in the middle of the top cover, a connecting rotating shaft is connected to the outer side of the folding telescopic mechanism, the folding telescopic mechanism is located in the middle of the mounting seat, a crank arm connecting rod is arranged above the connecting rotating shaft, a central rotating shaft is arranged in the middle of the crank arm connecting rod, and a unit antenna, and a sealing protection mechanism is arranged on the outer side of the unit antenna mechanism.
Optionally, the lifting adjusting mechanism comprises a connecting sleeve, a sliding rod and a connecting seat, the sliding rod is embedded in the inner side of the connecting sleeve, and the connecting seat is connected to the top end of the sliding rod.
Optionally, the vertical center line of the connecting sleeve and the vertical center line of the sliding rod are located on the same vertical line, and the connecting sleeve and the sliding rod are identical in size.
Optionally, the vertical central line of the protective shell and the vertical central line of the sealing sleeve are located on the same vertical line, and the size of the stand column is matched with that of the sliding rod.
Optionally, the folding telescopic mechanism comprises a connecting side plate, a sliding groove, a connecting sliding block and a translation seat, the sliding groove is formed in the inner side of the connecting side plate, the connecting sliding block is installed on the inner side of the sliding groove, and the translation seat is connected to the middle of the connecting sliding block.
Optionally, the translation seat is connected with the sliding groove in a sliding manner through a connecting sliding block, and the horizontal center lines of the sliding grooves are parallel to each other.
Optionally, the unit antenna mechanism includes an assembly seat, a reflection plate, a feed network, and a radiation unit, the reflection plate is installed inside the assembly seat, the feed network is installed on the front surface of the reflection plate, and the radiation unit is installed in the middle of the feed network.
Optionally, the unit antenna mechanisms are uniformly arranged around the periphery of the vertical center line of the upright post in a circumferential manner, and six unit antenna mechanisms are arranged.
Optionally, the sealing protection mechanism comprises an antenna housing, a sealing ring, a heat dissipation back plate and heat dissipation fins, the sealing ring is arranged at each of the upper end and the lower end of the antenna housing, the heat dissipation back plate is installed on the outer side of the antenna housing, and the heat dissipation fins are arranged in the middle of the heat dissipation back plate.
Optionally, the inner side surface of the heat dissipation back plate and the outer side surface of the antenna housing are attached to each other, and the vertical center lines of the heat dissipation fins are parallel to each other.
The invention provides a miniaturized antenna applied to a D2D communication technology in 5G communication, which has the following beneficial effects:
1. this be applied to miniaturized antenna of D2D communication technology in 5G communication, can the position of adjusting device protective housing through lift adjustment mechanism, the protective housing of device is connected with the slide bar through the connecting seat, the inboard at adapter sleeve is installed to the slide bar nestification, the slide bar can stretch out and draw back in the adapter sleeve, with the height of adjusting the connecting seat, thereby adjust the position of protective housing, when the slide bar upwards stretches out, the protective housing can break away from the device main part, make the device can normally work, when the slide bar withdraws downwards, the protective housing cage is in the device main part outside, can protect the device, be favorable to improving the use flexibility of device.
2. This be applied to miniaturized antenna of D2D communication technology in 5G communication, can wrap up the protection with the device primary structure through the protective housing, when abominable antenna or environment appear, the protective housing can protect the device, prevent external environment damage device major structure, be favorable to improving the reliability of device, and the protective housing outside is provided with solar cell panel, can be when the device outage, temporarily for the device power supply, be favorable to improving the reliability of device, the top cap at protective housing top links to each other with the stand through sealed sleeve simultaneously, can keep the compactness of connecting, prevent that the rainwater from falling into the device.
3. This be applied to miniaturized antenna of D2D communication technology in 5G communication, can expand and accomodate the antenna structure of device through folding telescopic machanism, the antenna transmission mechanism of device installs on the translation seat, and the translation seat can slide in the spout through connecting the slider, thereby adjust translation seat and antenna transmission mechanism's position, when the translation seat slides to the inboard, can fold antenna transmission mechanism and accomodate, with protection antenna transmission mechanism and the holistic volume of reduction device, keep miniaturized, and when the translation seat slides to the outside, can expand antenna transmission mechanism, with improve transmission range, be favorable to improving the use flexibility of device.
4. This be applied to miniaturized antenna of D2D communication technology in 5G communication, carry out wireless signal's transmission work through unit antenna mechanism, the device is provided with six independent unit antenna mechanisms, unit antenna mechanism is the circumference form around the stand periphery and evenly arranges, can realize the signal transmission of three hundred sixty degrees around the device, be favorable to improving the transmission angle and the scope of device, and unit antenna mechanism rotates with the translation seat through connecting the pivot to be connected, can freely adjust inclination through connecting pivot and crank arm connecting rod cooperation, be favorable to improving the use flexibility of device.
5. This be applied to miniaturized antenna of D2D communication technology in 5G communication, enclosed construction protection unit antenna mechanism who constitutes through the antenna house, the antenna house is the shell structure, nested the installation is in the mount pad outside, can protect the primary structure of unit antenna mechanism in inside, provide certain safeguard function, prevent that external debris from damaging unit antenna mechanism, and the antenna house is provided with the sealing washer with the junction of mount pad, the sealing washer can keep the compact type of junction, prevent that water from getting into the antenna house, lead to damaging unit antenna mechanism and damage, be favorable to improving the protectiveness of device, and the heat dissipation backplate is installed to the antenna house rear side, be provided with a plurality of heat radiation fins on the heat dissipation backplate, can increase the area of contact with the air, be favorable to improving the radiating efficiency of device.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a schematic view of a solar panel according to the present invention;
FIG. 4 is a schematic view of a fixing base of the present invention;
FIG. 5 is a schematic view of the protective case of the present invention;
FIG. 6 is a schematic view of the fully-extended fixing base of the present invention;
FIG. 7 is a schematic view of the fixing base structure in a fully retracted state according to the present invention;
FIG. 8 is a schematic structural view of a folding and telescoping mechanism of the present invention;
FIG. 9 is a schematic structural diagram of a unit antenna mechanism according to the present invention;
fig. 10 is a schematic structural diagram of the seal protection mechanism of the present invention.
In the figure: 1. a column; 2. installing a sleeve; 3. a base; 4. a fixed seat; 5. a mounting seat; 6. a lifting adjusting mechanism; 601. a connecting sleeve; 602. a slide bar; 603. a connecting seat; 7. a protective shell; 8. a solar panel; 9. a top cover; 10. a sealing sleeve; 11. a folding telescopic mechanism; 1101. connecting the side plates; 1102. a chute; 1103. connecting the sliding block; 1104. a translation seat; 12. connecting the rotating shaft; 13. a crank arm connecting rod; 14. a central rotating shaft; 15. a unit antenna mechanism; 1501. assembling a seat; 1502. a reflective plate; 1503. a feed network; 1504. a radiation unit; 16. a sealing protection mechanism; 1601. an antenna cover; 1602. a seal ring; 1603. a heat dissipation back plate; 1604. and heat dissipation fins.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 10, the present invention provides a technical solution: a miniaturized antenna applied to a D2D communication technology in 5G communication comprises a stand column 1 and a folding telescopic mechanism 11, wherein a mounting sleeve 2 is nested and installed on the outer side of the stand column 1, a base 3 is fixedly connected to the outer side of the mounting sleeve 2, a fixed seat 4 is installed above the base 3, a mounting seat 5 is connected to the outer side of the fixed seat 4, a lifting adjusting mechanism 6 is installed above the mounting seat 5, the lifting adjusting mechanism 6 comprises a connecting sleeve 601, a sliding rod 602 and a connecting seat 603, a sliding rod 602 is nested and installed on the inner side of the connecting sleeve 601, the top end of the sliding rod 602 is connected with the connecting seat 603, the vertical center line of the connecting sleeve 601 and the vertical center line of the sliding rod 602 are located on the same vertical line, the size of the connecting sleeve 601 and the sliding rod 602 is matched, a protective shell 7 is connected above the lifting adjusting mechanism 6, the device can adjust the position of a protective shell 7 of the device through a lifting adjusting mechanism 6, the protective shell 7 of the device is connected with a sliding rod 602 through a connecting seat 603, the sliding rod 602 is nested and installed on the inner side of a connecting sleeve 601, the sliding rod 602 can stretch out and draw back in the connecting sleeve 601 to adjust the height of the connecting seat 603, so that the position of the protective shell 7 is adjusted, when the sliding rod 602 extends upwards, the protective shell 7 can be separated from a device main body, the device can work normally, when the sliding rod 602 is retracted downwards, the protective shell 7 is covered outside the device main body, the device can be protected, and the use flexibility of the device is improved;
a top cover 9 is arranged above the protective shell 7, a sealing sleeve 10 is arranged in the middle of the top cover 9, the vertical central line of the protective shell 7 and the vertical central line of the sealing sleeve 10 are positioned on the same vertical line, the size of the upright post 1 is identical with that of the sliding rod 602, the device can wrap and protect the main structure of the device through the protective shell 7, when severe antenna or environment occurs, the protective shell 7 can protect the device, the external environment is prevented from damaging the main structure of the device, the reliability of the device is improved, a solar cell panel 8 is arranged on the outer side of the protective shell 7, power can be temporarily supplied to the device when the device is powered off, the reliability of the device is improved, meanwhile, the top cover 9 at the top of the protective shell 7 is connected with the upright post 1 through the sealing sleeve 10, the connection;
the outer side of the folding telescopic mechanism 11 is connected with a connecting rotating shaft 12, the folding telescopic mechanism 11 is positioned in the middle of the mounting seat 5, the folding telescopic mechanism 11 comprises a connecting side plate 1101, a sliding groove 1102, a connecting sliding block 1103 and a translation seat 1104, the inner side of the connecting side plate 1101 is provided with the sliding groove 1102, the inner side of the sliding groove 1102 is provided with the connecting sliding block 1103, the middle of the connecting sliding block 1103 is connected with the translation seat 1104, the translation seat 1104 is connected with the sliding groove 1102 in a sliding manner through the connecting sliding block 1103, the horizontal central lines of the sliding groove 1102 are parallel to each other, the antenna structure of the device can be unfolded and stored through the folding telescopic mechanism 11, the antenna transmission mechanism of the device is arranged on the translation seat 1104, and the translation seat 1104 can slide in the sliding groove 1102 through the connecting sliding block 1103, so as to adjust the positions of the translation seat 1104 and the antenna transmission mechanism, the antenna transmission mechanism can be unfolded when the translation seat 1104 slides outwards, so that the transmission range is enlarged, and the use flexibility of the device is improved;
a crank arm connecting rod 13 is arranged above the connecting rotating shaft 12, a central rotating shaft 14 is arranged in the middle of the crank arm connecting rod 13, a unit antenna mechanism 15 is connected to the outer side of the connecting rotating shaft 12, a sealing protection mechanism 16 is arranged on the outer side of the unit antenna mechanism 15, the unit antenna mechanism 15 comprises an assembling seat 1501, a reflecting plate 1502, a feeding network 1503 and radiation units 1504, the reflecting plate 1502 is arranged on the inner side of the assembling seat 1501, the feeding network 1503 is arranged on the front surface of the reflecting plate 1502, the radiation units 1504 are arranged in the middle of the feeding network 1503, the unit antenna mechanisms 15 are uniformly arranged in a circumferential mode around the periphery of a vertical central line of the upright post 1, the number of the unit antenna mechanisms 15 is six, the device carries out wireless signal transmission work through the unit antenna mechanisms 15, the device is provided with six independent unit antenna mechanisms 15, and the unit antenna mechanisms 15 are uniformly arranged, the unit antenna mechanism 15 is rotatably connected with the translation seat 1104 through the connecting rotating shaft 12, and the inclination angle can be freely adjusted through the matching of the connecting rotating shaft 12 and the crank arm connecting rod 13, so that the use flexibility of the device is improved;
the sealing protection mechanism 16 comprises a radome 1601, a sealing ring 1602, a heat dissipation back plate 1603 and heat dissipation fins 1604, the upper end and the lower end of the radome 1601 are respectively provided with the sealing ring 1602, the heat dissipation back plate 1603 is installed on the outer side of the radome 1601, the heat dissipation fins 1604 are arranged in the middle of the heat dissipation back plate 1603, the inner side surface of the heat dissipation back plate 1603 is mutually attached to the outer side surface of the radome 1601, the vertical center lines of the heat dissipation fins 1604 are mutually parallel, the device protects the unit antenna mechanism 15 through a closed structure formed by the radome 1601, the radome 1601 is of a cylindrical structure and is nested and installed on the outer side of the assembly seat 1501, the main structure of the unit antenna mechanism 15 can be protected inside, a certain protection function is provided, the unit antenna mechanism 15 is prevented from being damaged by external sundries, the sealing ring 1602 is arranged at, prevent that water from getting into antenna house 1601, lead to damaging unit antenna mechanism 15 and damage, be favorable to the protectiveness of improving the device, heat dissipation backplate 1603 is installed to antenna house 1601 rear side moreover, is provided with a plurality of heat radiation fins 1604 on heat dissipation backplate 1603, can increase the area of contact with the air, is favorable to the radiating efficiency of improvement device.
In summary, in the miniaturized antenna applied to the D2D communication technology in the 5G communication, when in use, the corresponding lines of the device are connected first, then the device is unfolded as a whole, the device is provided with a protective shell 7, the main structure of the device can be covered and protected by the protective shell 7, the protective shell 7 is connected with a sliding rod 602 through a connecting seat 603, the sliding rod 602 is nested and installed inside a connecting sleeve 601, the sliding rod 602 is extended upwards to adjust the height of the connecting seat 603, so as to adjust the position of the protective shell 7, so that the protective shell 7 can be separated from the device body, and the device can be unfolded further conveniently, an antenna transmission mechanism of the device is installed on a translation seat 1104, the translation seat 1104 is slid outwards in a sliding groove 1102 through a connecting slide block 1103, then a unit antenna mechanism 15 is rotatably connected with the translation seat 1104 through a connecting rotary shaft 12 and is matched, the inclination angle of the unit antenna mechanism 15 is freely adjusted, so that the unfolding operation is completed, and the signal transmission operation can be performed, the device performs the wireless signal transmission operation through the unit antenna mechanism 15, the device is provided with six independent unit antenna mechanisms 15, the unit antenna mechanisms 15 are uniformly distributed in a circumference shape around the periphery of the upright post 1, the signal transmission of three hundred sixty degrees around the device can be realized, meanwhile, the unit antenna mechanism 15 is protected through a closed structure formed by the antenna housing 1601, the unit antenna mechanism 15 is prevented from being damaged by external sundries, a sealing ring 1602 is arranged at the joint of the antenna housing 1601 and the assembling seat 1501, the sealing ring 1602 can keep the compact shape of the joint to prevent water from entering the antenna housing 1601, a heat dissipation backboard 1603 is arranged at the rear side of the antenna housing 1601, a plurality of heat dissipation fins 1604 are arranged on the heat dissipation backboard 1603, the contact area with air, the device is prevented from being overheated, the solar cell panel 8 is arranged on the outer side of the protective shell 7, power can be supplied to the device temporarily when the device is powered off, and therefore the whole using process of the miniaturized antenna applied to the D2D communication technology in 5G communication is completed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A miniaturized antenna applied to D2D communication technology in 5G communication comprises a stand column (1) and a folding telescopic mechanism (11), and is characterized in that: the outer side of the upright post (1) is nested with a mounting sleeve (2), the outer side of the mounting sleeve (2) is fixedly connected with a base (3), a fixing seat (4) is installed above the base (3), the outer side of the fixing seat (4) is connected with a mounting seat (5), a lifting adjusting mechanism (6) is installed above the mounting seat (5), a protective shell (7) is connected above the lifting adjusting mechanism (6), a solar cell panel (8) is installed on the outer side of the protective shell (7), a top cover (9) is arranged above the protective shell (7), a sealing sleeve (10) is arranged in the middle of the top cover (9), a connecting rotating shaft (12) is connected to the outer side of the folding telescopic mechanism (11), the folding telescopic mechanism (11) is located in the middle of the mounting seat (5), and a crank connecting rod (13) is arranged above the connecting rotating shaft (12), a central rotating shaft (14) is arranged in the middle of the crank arm connecting rod (13), a unit antenna mechanism (15) is connected to the outer side of the connecting rotating shaft (12), a sealing protection mechanism (16) is installed on the outer side of the unit antenna mechanism (15), the lifting adjusting mechanism (6) comprises a connecting sleeve (601), a sliding rod (602) and a connecting seat (603), the sliding rod (602) is embedded and installed on the inner side of the connecting sleeve (601), the connecting seat (603) is connected to the top end of the sliding rod (602), when the sliding rod (602) extends upwards, the protective shell (7) can be separated from the device body, when the sliding rod (602) retracts downwards, the protective shell (7) covers the outer side of the device body, the folding telescopic mechanism (11) comprises a connecting side plate (1101), a sliding groove (1102), a connecting sliding block (1103) and a translational seat (1104), and the sliding groove (1102) is arranged, connecting sliding blocks (1103) are installed on the inner sides of the sliding grooves (1102), the middle of each connecting sliding block (1103) is connected with a translation seat (1104), each translation seat (1104) is connected with the corresponding sliding groove (1102) in a sliding mode through the corresponding connecting sliding block (1103), and the horizontal center lines of the sliding grooves (1102) are parallel to each other.
2. The miniaturized antenna applied to the D2D communication technology in 5G communication according to claim 1, wherein: the vertical central line of the connecting sleeve (601) and the vertical central line of the sliding rod (602) are positioned on the same vertical line, and the connecting sleeve (601) and the sliding rod (602) are matched in size.
3. The miniaturized antenna applied to the D2D communication technology in 5G communication as claimed in claim 2, wherein: the vertical central line of the protective shell (7) and the vertical central line of the sealing sleeve (10) are positioned on the same vertical line, and the size of the upright column (1) is matched with that of the sliding rod (602).
4. The miniaturized antenna applied to the D2D communication technology in 5G communication according to claim 1, wherein: the unit antenna mechanism (15) comprises an assembling seat (1501), a reflecting plate (1502), a feed network (1503) and a radiation unit (1504), wherein the reflecting plate (1502) is installed on the inner side of the assembling seat (1501), the feed network (1503) is arranged on the front surface of the reflecting plate (1502), and the radiation unit (1504) is installed in the middle of the feed network (1503).
5. The miniaturized antenna of claim 4 applied to D2D communication technology in 5G communication, wherein: the unit antenna mechanisms (15) are uniformly arranged in a circumferential mode around the periphery of the vertical center line of the upright post (1), and six unit antenna mechanisms (15) are arranged.
6. The miniaturized antenna applied to the D2D communication technology in 5G communication according to claim 1, wherein: sealed protection machanism (16) include antenna house (1601), sealing washer (1602), heat dissipation backplate (1603) and heat radiation fins (1604), and the upper and lower both ends of antenna house (1601) all are provided with sealing washer (1602), heat dissipation backplate (1603) is installed in the outside of antenna house (1601), and is provided with heat radiation fins (1604) in the middle of heat dissipation backplate (1603).
7. The miniaturized antenna of claim 6 applied to D2D communication technology in 5G communication, wherein: the inner side face of the heat dissipation back plate (1603) and the outer side face of the antenna housing (1601) are attached to each other, and the vertical center lines of the heat dissipation fins (1604) are parallel to each other.
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| CN201910236804.4A CN109802218B (en) | 2019-03-27 | 2019-03-27 | Miniaturized antenna applied to D2D communication technology in 5G communication |
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| CN201910236804.4A CN109802218B (en) | 2019-03-27 | 2019-03-27 | Miniaturized antenna applied to D2D communication technology in 5G communication |
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