CN114552219A - Ultralow-profile double-frequency single-layer small mobile antenna based on MGAA unit - Google Patents
Ultralow-profile double-frequency single-layer small mobile antenna based on MGAA unit Download PDFInfo
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- CN114552219A CN114552219A CN202210066476.XA CN202210066476A CN114552219A CN 114552219 A CN114552219 A CN 114552219A CN 202210066476 A CN202210066476 A CN 202210066476A CN 114552219 A CN114552219 A CN 114552219A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
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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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/25—Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention belongs to the technical field of small-sized mobile antennas, and discloses an ultra-low section double-frequency single-layer small-sized mobile antenna based on an MGAA unit, which comprises a dielectric substrate, a metal floor, an MGAA unit, a rectangular parasitic microstrip and a coaxial feeder line; the MGAA unit and the rectangular parasitic microstrip are attached to the upper side of the medium substrate, and the metal floor is attached to the lower side of the medium substrate; the MGAA unit is in a funnel shape and is positioned in the middle of the dielectric substrate, and the central position of the MGAA unit is connected with the inner conductor of the coaxial feeder line for feeding so as to radiate low-frequency linearly polarized electromagnetic waves; the rectangular parasitic micro-strips are positioned on the left side and the right side of the center of the MGAA unit and used for radiating high-frequency linearly polarized waves. The invention introduces the MGAA unit into the double-frequency design of the mobile communication equipment, so as to solve the problems of miniaturization, higher section and multi-band characteristic of the antenna and realize the double-frequency work of the antenna by adding a parasitic structure.
Description
Technical Field
The invention belongs to the technical field of small-sized mobile antennas, and particularly relates to an ultra-low profile double-frequency single-layer small-sized mobile antenna based on an MGAA unit.
Background
Currently, the Federal Communications Commission (FCC) defines the operating range of an ultra-wideband (UWB) antenna to be 3.1GHz to 10.6GHz, and the ultra-wideband antenna has the advantages of high transmission rate and low power consumption, and is one of the research hotspots in the antenna field. The application guidelines for ultra-wideband frequencies are contained in ieee802.15.4-2015 and ieee802.15.4z, where channels commonly used for small mobile antennas are channel 5 (center frequency 6489.6MHz, bandwidth 499.2MHz) and channel 9 (center frequency 7987.2MHz, bandwidth 499.2 MHz).
Microstrip Grid Array Antenna (MGAA), for short, attracts people's extensive attention with its advantages of high gain, wide bandwidth, simple feed, easy construction, etc. MGAA is an important alternative, especially in the development of encapsulated antenna technology. At present, the main working frequency band range of the MGAA antenna is mainly focused on the U-band (40-60GHz), the main research characteristics are focused on the situation of array, the research on units is less, the research on double frequencies is also focused on the situation of large frequency ratio, and the research on the situation of small frequency ratio is also less.
There are many ways to design a dual-band microstrip antenna, such as slotting or adding branches to a patch, or adding parasitic structures, but it is difficult to satisfy the requirements of miniaturization, low profile, and wide bandwidth. Northwest industrial university has published a novel microstrip antenna for dual-frequency operation of mobile phones (northwest industrial university, a novel microstrip antenna for dual-frequency operation of mobile phones, application No. CN200710018241.9, application date 2007.07.11), which utilizes the working principle of left-hand and right-hand composite microstrip lines to realize dual-frequency operation of the antenna at 960MHz and 1800MHz, but the bandwidth is very narrow, and almost only point-frequency operation is possible. In the prior art, a dual-frequency microstrip antenna (dual-frequency microstrip antenna, application No. CN102983395A, application date 2013.01.12) is disclosed, which realizes dual-frequency operation by feeding upper and lower patches respectively; also disclosed in the prior art is a dual-band microstrip antenna (a dual-band microstrip antenna, application No. CN2020332429.8, application date 2021.02.19), in which a transceiver antenna is also integrated, and dual-band functions are realized by two radiators. Although the two antennas can realize the function of dual-frequency, the introduction of the upper and lower layer patches inevitably leads to the increase of the overall profile of the antenna, and is difficult to apply in the scene with high requirements on the profile of the mobile phone.
Through the above analysis, the problems and defects of the prior art are as follows:
the introduction of the upper and lower layer patches of the existing dual-band microstrip antenna inevitably leads to the increase of the overall section of the antenna, and the antenna is difficult to be applied in a scene with high requirements on the section of a mobile phone.
The difficulty in solving the above problems and defects is:
according to the conventional patch antenna theory, if the bandwidth of the dual band covers the channel 5 (center frequency 6489.6MHz, bandwidth 499.2MHz) and the channel 9 (center frequency 7987.2MHz, bandwidth 499.2MHz), increasing the height of the dielectric substrate and increasing the dielectric constant of the dielectric substrate are effective approaches, but usually the dielectric constant of the dielectric substrate in a small mobile antenna is fixed, so it is very challenging to satisfy both the bandwidth and the low profile of the dual band.
The significance of solving the problems and the defects is as follows:
the size of the section of the small mobile antenna often determines the size of the section of the mobile phone, so that it is an urgent need in the mobile phone industry to reduce the section of the small mobile antenna as much as possible while meeting the bandwidth requirement of the dual frequency bands.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an ultra-low-profile double-frequency single-layer small mobile antenna based on an MGAA unit.
The invention is realized in this way, a ultra-low profile dual-frequency single-layer small mobile antenna based on MGAA unit includes:
the antenna comprises a dielectric substrate, a metal floor, an MGAA unit, a rectangular parasitic microstrip and a coaxial feeder line;
the MGAA unit and the rectangular parasitic micro-strip are attached to the upper side of the medium substrate, and the metal floor is attached to the lower side of the medium substrate;
the MGAA unit is in a funnel shape and is positioned in the middle of the dielectric substrate, and the central position of the MGAA unit is connected with an inner conductor of the coaxial feeder line for feeding so as to radiate low-frequency linearly polarized electromagnetic waves;
the rectangular parasitic micro-strips are positioned on the left side and the right side of the center of the MGAA unit and used for radiating high-frequency linearly polarized waves.
Further, the edges of the MGAA units are in a fillet structure, and the fillet structure is used for expanding the bandwidth.
Further, the length and the width of the rectangular parasitic microstrip are 0.24 lambda and 0.06 lambda respectively, and the corner cutting processing is performed on one side of the rectangular parasitic microstrip close to the MGAA unit to increase the coupling amount.
Furthermore, the corner cutting direction of the rectangular parasitic microstrip is the same as the angle of the MGAA oblique side, and the distance from the MGAA unit is 0.3 mm.
Further, an outer conductor of the coaxial feeder is connected with a metal floor, and an inner conductor of the coaxial feeder penetrates through the dielectric substrate and is welded with the radiation MGAA unit.
Further, the MGAA unit and the rectangular parasitic microstrip are both of a symmetrical structure.
Further, the dielectric substrate has a dielectric constant of 3.0, a loss tangent of 0.002 and a cross-sectional height of 0.05 λ.
Furthermore, the metal floor is made of copper and has the size of 140mm x 70 mm.
Further, the coaxial feeder is a 50-ohm coaxial feeder, the radius of an inner conductor of the coaxial feeder is 0.4mm, and the circle center is located at the center of two oblique sides of the MGAA unit.
Further, the length of the rectangular parasitic microstrip is 9.8mm, and the width of the rectangular parasitic microstrip is 1.4 mm.
By combining all the technical schemes, the invention has the advantages and positive effects that:
1. the MGAA unit is introduced into the double-frequency design of the mobile communication equipment for the first time, so that the problems of miniaturization, higher section and multi-band characteristic of the antenna are solved, and the double-frequency work of the antenna is realized by adding a parasitic structure;
2. compared with the traditional slotted and branched dual-frequency microstrip antenna, the dual-frequency microstrip antenna can work at 6.15GHz-6.76GHz and 7.37GHz-8.32GHz, covers two frequency bands of IEEE802.15.4-2015 and IEEE802.15.4z applied to a channel 5 and a channel 9 of a small mobile antenna, meets the requirement of mobile phone communication, and has relative bandwidths of 8.3% and 12.1%, and the wide bandwidth is difficult to realize by the traditional microstrip antenna;
3. the invention adopts a common substrate plate with low cost, but the section can be made very low, only 0.05, the antenna can be miniaturized, and the metal area is only 143mm while the excellent bandwidth and dual-frequency performance are realized2The gain of the low frequency band can reach more than 5dBi, and the gain of the high frequency band can reach more than 1.8 dBi.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an ultra-low-profile dual-frequency single-layer small mobile antenna based on an MGAA unit according to an embodiment of the present invention.
Fig. 2 is a graph of the port reflection coefficient of an ultra-low-profile dual-frequency single-layer small mobile antenna based on MGAA units according to an embodiment of the present invention.
Fig. 3(a) is a port gain variation of an ultra-low profile dual-frequency single-layer small mobile antenna based on MGAA units in a low frequency band according to an embodiment of the present invention.
Fig. 3(b) is a port gain variation of an ultra-low profile dual-frequency single-layer small mobile antenna based on MGAA units in a high frequency band according to an embodiment of the present invention.
In the figure: 1. a metal floor; 2. a dielectric substrate; 3. an MGAA unit; 4. a rectangular parasitic microstrip; 5. a 50 ohm coaxial feed.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In view of the problems in the prior art, the present invention provides an ultra-low profile dual-band single-layer small mobile antenna based on an MGAA unit, and the present invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the ultra-low-profile dual-frequency single-layer small mobile antenna based on the MGAA unit provided by the embodiment of the present invention includes a metal floor 1, a dielectric substrate 2, an MGAA unit 3, a rectangular parasitic microstrip 4, and a 50-ohm coaxial feeder 5.
The MGAA unit 3 and the rectangular parasitic microstrip 4 in the embodiment of the present invention are attached to the upper side of the dielectric substrate 2 and located at the uppermost layer of the antenna.
The dielectric substrate 2 in the embodiment of the invention is positioned in the middle layer of the ultra-low-profile dual-frequency single-layer small mobile antenna based on the MGAA unit.
The metal floor 1 in the embodiment of the invention is positioned at the lower layer of the dielectric substrate 2, is made of copper, and has the size of 70mm x 140 mm.
The MGAA unit 3 in the embodiment of the invention is in a funnel shape and is positioned in the center of the dielectric substrate 2, and the central position of the MGAA unit 3 is connected with an inner conductor of a coaxial feeder 5 with 50 ohms for feeding, and is mainly used for radiating low-frequency linearly polarized electromagnetic waves. The MGAA unit 3 is in the shape of a funnel composed of six sides, each side having a length of 13.5mm and a width of 1.2mm, wherein the angle formed by two oblique sides is 126 degrees. Rounding off the edges of the MGAA units to expand the bandwidth;
the rectangular parasitic microstrips 4 in the embodiment of the present invention are located on the left and right sides of the center of the MGAA unit 3, and are mainly used for radiating high-frequency linearly polarized waves. The length and width of the rectangular parasitic microstrip are 0.24 lambda and 0.06 lambda (for high frequency), and the corner cutting process is performed on the side close to the MGAA unit to increase the coupling amount.
Preferably, the length of the rectangular parasitic microstrip 4 in the embodiment of the present invention is 9.8mm, the width is 1.4mm, the corner cutting direction is the same as the angle of the MGAA oblique side, and the distance from the MGAA unit is 0.3 mm.
The coaxial feed line 5 of 50 ohms in the embodiment of the invention passes through the dielectric substrate and performs welding feed with the radiation MGAA unit.
The MGAA unit and the rectangular parasitic microstrip in the embodiment of the invention are made of copper, and the thickness of the MGAA unit and the rectangular parasitic microstrip is 0.035 mm.
The dielectric substrate 2 in the embodiment of the invention is made of a commonly used broadband antenna dielectric substrate material, and has a relative dielectric constant of 3, a loss tangent of 0.002 and an overall size of 40mm by 2.4 mm.
The radius of an inner conductor of the 50 ohm coaxial feeder 5 in the embodiment of the invention is 0.4mm, and the circle center is positioned at the center of two oblique sides of the MGAA unit.
The optimized model is simulated, the return loss is shown in figure 2, and the impedance bandwidths of 6.15GHz-6.76GHz and 7.37GHz-8.32GHz can be seen from the figure; the port gain variation of the antenna at the low frequency band is shown in fig. 3(a), and it can be seen that the normal gains of the antenna at the low frequency end are all greater than 5 dBi; the port gain variation of the antenna in the high frequency band is shown in fig. 3(b), and it can be seen that the normal gain of the antenna in the high frequency band is greater than 1.8 dBi.
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.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An MGAA unit-based ultra-low profile dual-frequency single layer small mobile antenna, comprising:
the antenna comprises a dielectric substrate, a metal floor, an MGAA unit, a rectangular parasitic microstrip and a coaxial feeder line;
the MGAA unit and the rectangular parasitic microstrip are attached to the upper side of the medium substrate, and the metal floor is attached to the lower side of the medium substrate;
the MGAA unit is in a funnel shape and is positioned in the middle of the dielectric substrate, and the central position of the MGAA unit is connected with an inner conductor of the coaxial feeder line for feeding so as to radiate low-frequency linearly polarized electromagnetic waves;
the rectangular parasitic micro-strips are positioned on the left side and the right side of the center of the MGAA unit and used for radiating high-frequency linearly polarized waves.
2. The MGAA-cell-based ultra-low-profile dual-frequency single-layer small mobile antenna of claim 1, wherein the MGAA cell edges are rounded off structures, the rounded off structures being used to extend bandwidth.
3. The ultra-low profile dual-frequency single-layer small mobile antenna based on the MGAA unit of claim 1, wherein the length and width of the rectangular parasitic microstrip are 0.24 λ and 0.06 λ, respectively, and a side of the rectangular parasitic microstrip near the MGAA unit is chamfered to increase coupling amount.
4. The ultra-low profile dual-band single-layer small mobile antenna based on MGAA cells of claim 1, wherein the corner cut direction of the rectangular parasitic microstrip is the same as the angle of the MGAA hypotenuse, and is 0.3mm away from the MGAA cells.
5. The ultra-low profile dual-frequency single-layer small mobile antenna based on the MGAA unit of claim 1, wherein an outer conductor of the coaxial feed line is connected to a metal floor, and an inner conductor of the coaxial feed line passes through the dielectric substrate and is soldered to the radiating MGAA unit.
6. The ultra-low profile dual-frequency single-layer small mobile antenna based on the MGAA unit of claim 1, wherein the MGAA unit and the rectangular parasitic microstrip are both symmetrical structures.
7. The MGAA unit-based ultra-low profile dual-frequency single layer small mobile antenna as recited in claim 1, wherein the dielectric substrate has a dielectric constant of 3.0, a loss tangent of 0.002, and a profile height of 0.05 λ.
8. The MGAA-based ultra-low profile dual-frequency single layer small mobile antenna of claim 1, wherein the metal floor is copper and has a size of 140mm x 70 mm.
9. The ultra-low profile dual-frequency single-layer small mobile antenna based on the MGAA cell of claim 1, wherein the coaxial feed line is a 50 ohm coaxial feed line, the inner conductor of the coaxial feed line has a radius of 0.4mm, and the center of the circle is located at the center of two oblique sides of the MGAA cell.
10. The MGAA-cell-based ultra-low profile dual-frequency single layer small mobile antenna as recited in claim 1, wherein the rectangular parasitic microstrip has a length of 9.8mm and a width of 1.4 mm.
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| CN202210066476.XA CN114552219B (en) | 2022-01-20 | 2022-01-20 | MGAA unit-based ultralow-profile double-frequency single-layer small mobile antenna |
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| CN202210066476.XA CN114552219B (en) | 2022-01-20 | 2022-01-20 | MGAA unit-based ultralow-profile double-frequency single-layer small mobile antenna |
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| CN114552219B CN114552219B (en) | 2023-06-02 |
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2022
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| US20190067834A1 (en) * | 2017-08-30 | 2019-02-28 | Korea Advanced Institute Of Science And Technology | Series-Fed E-shaped Patch Antenna Array with Co-polarized Parasitic Patches |
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