CN114552219B - MGAA unit-based ultralow-profile double-frequency single-layer small mobile antenna - Google Patents
MGAA unit-based ultralow-profile double-frequency single-layer small mobile antenna Download PDFInfo
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- CN114552219B CN114552219B CN202210066476.XA CN202210066476A CN114552219B CN 114552219 B CN114552219 B CN 114552219B CN 202210066476 A CN202210066476 A CN 202210066476A CN 114552219 B CN114552219 B CN 114552219B
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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 MGAA unit-based ultralow-profile dual-frequency single-layer small-sized mobile antenna, which comprises a dielectric substrate, a metal floor, an MGAA unit, a rectangular parasitic microstrip and a coaxial feeder; the MGAA unit and the rectangular parasitic microstrip are attached to the upper side of the dielectric substrate, and the metal floor is attached to the lower side of the dielectric substrate; the MGAA unit is funnel-shaped and is positioned at the middle position of the medium substrate, and the central position of the MGAA unit is connected with the inner conductor of the coaxial feeder for feeding and is used for radiating low-frequency linearly polarized electromagnetic waves; the rectangular parasitic micro-strips are positioned at the left side and the right side of the center of the MGAA unit and used for radiating high-frequency linear polarized waves. The MGAA unit is introduced into the dual-frequency design of the mobile communication equipment, so that the problems of miniaturization, higher section and multiband characteristics of the antenna are solved, and the dual-frequency operation of the antenna is realized 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 MGAA unit-based ultralow-profile double-frequency single-layer small-sized mobile antenna.
Background
Currently, the Federal Communications Commission (FCC) defines an operating range of Ultra Wideband (UWB) antennas from 3.1GHz to 10.6GHz, and the UWB antennas have been one of the research hotspots in the antenna field due to their advantages of high transmission rate and low power consumption. The criteria for ultra wideband frequency applications are contained in IEEE802.15.4-2015 and IEEE802.15.4z, where the channels that small mobile antennas typically use are channel 5 (center frequency 6489.6MHz, bandwidth 499.2 MHz) and channel 9 (center frequency 7987.2MHz, bandwidth 499.2 MHz).
Microstrip grid array antennas (microstrip grid array antenna), abbreviated as MGAA, have attracted much attention because of their high gain, wide bandwidth, simple feed, easy construction, etc. In particular in the development of encapsulated antenna technology MGAA is an important alternative. The main working frequency band range of the MGAA antenna is mainly concentrated in a U-band (40-60 GHz), the main research characteristic is concentrated in the situation of array, the research on units is relatively less, the research on double frequencies is also concentrated in the situation of large frequency ratio, and the research on the situation of small frequency ratio is relatively less.
There are many methods for designing dual-band microstrip antennas, such as slotting on the patch, adding stubs, or adding parasitic structures, but it is difficult to meet the requirements of miniaturization, low profile, and wide bandwidth at the same time. The university of northwest industry publishes a novel microstrip antenna (a novel microstrip antenna which can be used for mobile phone dual-frequency operation, application number CN200710018241.9 and application date 2007.07.11) which utilizes the working principle of a left-right hand composite microstrip line to realize dual-frequency operation of the antenna at 960MHz and 1800MHz, but has very narrow bandwidth and almost can only be in point frequency operation. In the prior art, a dual-frequency microstrip antenna (dual-frequency microstrip antenna, application number CN102983395A, application date 2013.01.12) is disclosed, and dual-frequency operation is realized by feeding upper and lower patches respectively; in the prior art, a dual-frequency microstrip antenna (a dual-frequency microstrip antenna, application number CN2020332429.8, application date 2021.02.19) is also disclosed, and the transceiver antennas are integrated together, so that the dual-frequency function is realized through two radiators. Although the two antennas can realize the function of double frequency, the introduction of the upper patch and the lower patch inevitably leads to the increase of the whole section of the antenna, and the antenna is difficult to apply in a scene with high section requirements such as a mobile phone.
Through the above analysis, the problems and defects existing in the prior art are as follows:
the introduction of upper and lower patches of the existing dual-band microstrip antenna inevitably leads to the increase of the overall section of the antenna, and is difficult to apply in a scene with high section requirements of a mobile phone.
The difficulty of solving the problems and the defects is as follows:
according to the conventional patch antenna theory, if the bandwidths of the dual bands are made to cover the channel 5 (the center frequency 6489.6MHz, the bandwidth 499.2 MHz) and the channel 9 (the center frequency 7987.2MHz, the bandwidth 499.2 MHz), it is an effective way to increase the height of the dielectric substrate and increase the dielectric constant of the dielectric substrate, but in general, the dielectric constant of the dielectric substrate in the small mobile antenna is already fixed, so it is very challenging to meet both the two indexes of the bandwidth and the low profile of the dual bands.
The meaning of solving the problems and the defects is as follows:
the size of the cross section of the small mobile antenna often determines the size of the cross section of the mobile phone, so that the cross section of the small mobile antenna is reduced as much as possible under the condition of meeting the bandwidth requirement of dual frequency bands, which is just needed in the mobile phone industry.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides an MGAA unit-based ultralow-profile dual-frequency single-layer small mobile antenna.
The invention is realized in such a way that the MGAA unit-based ultralow-profile double-frequency single-layer miniature mobile antenna comprises:
the dielectric substrate, the metal floor, the MGAA unit, the rectangular parasitic microstrip and the coaxial feeder;
the MGAA unit and the rectangular parasitic microstrip are attached to the upper side of the dielectric substrate, and the metal floor is attached to the lower side of the dielectric substrate;
the MGAA unit is funnel-shaped and is positioned in the middle of the medium substrate, and the center of the MGAA unit is connected with the inner conductor of the coaxial feeder for feeding and is used for radiating low-frequency linearly polarized electromagnetic waves;
the rectangular parasitic micro-strips are positioned at the left side and the right side of the center of the MGAA unit and used for radiating high-frequency linear polarized waves.
Further, the edge of the MGAA unit is a rounded corner structure, and the rounded corner structure is used for expanding the bandwidth.
Further, the length and width of the rectangular parasitic microstrip are respectively 0.24 lambda and 0.06 lambda, and the side, close to the MGAA unit, of the rectangular parasitic microstrip is subjected to corner cutting treatment so as to increase the coupling quantity.
Further, the corner cutting direction of the rectangular parasitic microstrip is the same as the angle of the MGAA hypotenuse, and the distance from the MGAA unit is 0.3mm.
Further, the outer conductor of the coaxial feeder is connected with the metal floor, and the inner conductor of the coaxial feeder penetrates through the dielectric substrate and is welded with the radiation MGAA unit.
Furthermore, the MGAA unit and the rectangular parasitic microstrip are both symmetrical structures.
Further, the dielectric substrate had a dielectric constant of 3.0, a loss tangent of 0.002, and a cross-sectional height of 0.05λ.
Further, the metal floor is made of copper, and the size of the metal floor is 140mm 70mm.
Further, the coaxial feeder is a 50 ohm coaxial feeder, the radius of the inner conductor of the coaxial feeder is 0.4mm, and the circle center is positioned at the center of two bevel edges of the MGAA unit.
Further, the length of the rectangular parasitic microstrip is 9.8mm, and the width is 1.4mm.
By combining all the technical schemes, the invention has the advantages and positive effects that:
1. the MGAA unit is introduced into the dual-frequency design of the mobile communication equipment for the first time, so that the problems of miniaturization, higher section and multiband characteristics of the antenna are solved, and the dual-frequency operation of the antenna is realized by adding a parasitic structure;
2. compared with the traditional slotted and branched double-frequency microstrip antenna, the invention can realize the operation at 6.15GHz-6.76GHz and 7.37GHz-8.32GHz, covers two frequency bands of the channel 5 and the channel 9 of the small mobile antenna, which are applied to IEEE802.15.4-2015 and IEEE802.15.4z, meets the requirements of mobile phone communication, and has the relative bandwidths of 8.3 percent and 12.1 percent, wherein 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 very low with only 0.05 while realizing excellent bandwidth and dual-frequency performance, and the antenna can realize miniaturization with the metal area of only 143mm 2 The gain in the low frequency band can reach more than 5dBi, and the gain in the high frequency band can reach more than 1.8dBi.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly explain the drawings needed in the embodiments of the present application, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an MGAA unit-based ultra-low profile dual-frequency single-layer small mobile antenna according to an embodiment of the present invention.
Fig. 2 is a graph of port reflection coefficient of an MGAA unit-based ultra-low profile dual frequency single layer small mobile antenna according to an embodiment of the present invention.
Fig. 3 (a) shows a port gain variation of the MGAA unit-based ultra-low profile dual-frequency single-layer small mobile antenna in a low frequency band according to an embodiment of the present invention.
Fig. 3 (b) shows a port gain variation of the MGAA unit-based ultra-low profile dual-frequency single-layer small mobile antenna 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. rectangular parasitic microstrip; 5. a 50 ohm coaxial feed.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Aiming at the problems existing in the prior art, the invention provides an MGAA unit-based ultralow-profile dual-frequency single-layer miniature mobile antenna, and the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the MGAA unit-based ultralow-profile dual-frequency single-layer small mobile antenna provided by the embodiment of the invention comprises a metal floor 1, a dielectric substrate 2, an MGAA unit 3, a rectangular parasitic microstrip 4 and a 50 ohm coaxial feeder 5.
In the embodiment of the invention, the MGAA unit 3 and the rectangular parasitic microstrip 4 are attached to the upper side of the dielectric substrate 2 and are positioned 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 MGAA unit-based ultralow-profile double-frequency single-layer miniature mobile antenna.
In the embodiment of the invention, the metal floor 1 is positioned at the lower layer of the dielectric substrate 2, and is made of copper, and the size is 70 mm-140 mm.
The MGAA unit 3 in the embodiment of the invention is funnel-shaped and is positioned in the center of the dielectric substrate 2, and the center position of the MGAA unit 3 is connected with the inner conductor of the 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 funnel-shaped with six sides, each side having a length of 13.5mm and a width of 1.2mm, wherein the two hypotenuses form an angle of 126 degrees. The edge of the MGAA unit is subjected to rounding treatment to expand the bandwidth;
the rectangular parasitic microstrip 4 in the embodiment of the invention is positioned at the left and right sides of the center of the MGAA unit 3 and is mainly used for radiating high-frequency linear polarized waves. The rectangular parasitic microstrip has a length and width of 0.24 lambda and 0.06 lambda (for high frequency) respectively, and is subjected to corner cutting treatment on one 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 invention is 9.8mm, the width is 1.4mm, the chamfer direction is the same as the angle of the MGAA hypotenuse, and the distance from the MGAA unit is 0.3mm.
The 50 ohm coaxial feed line 5 in the embodiment of the invention passes through the dielectric substrate and is welded and fed with the radiation MGAA unit.
The MGAA unit and the rectangular parasitic microstrip in the embodiment of the invention are both made of copper, and the thickness is 0.035mm.
The material of the dielectric substrate 2 in the embodiment of the present invention is a common wideband antenna dielectric substrate material, the relative dielectric constant is 3, the loss tangent is 0.002, and the overall dimension is 40mm x 2.4mm.
The radius of the 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 bevel edges of the MGAA unit.
Simulation is carried out on the optimized model, the return loss of the model is shown as a graph in FIG. 2, and the impedance bandwidths of 6.15GHz-6.76GHz and 7.37GHz-8.32GHz can be seen from the graph; the port gain variation of the antenna in the low frequency band is shown in fig. 3 (a), and it can be seen that the normal gain of the antenna in the low frequency band is greater than 5dBi; the port gain variation 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 1.8dBi.
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore 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 foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention will be apparent to those skilled in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a small-size mobile antenna of base MGAA unit ultralow section dual-frenquency individual layer which characterized in that, small-size mobile antenna of base MGAA unit ultralow section dual-frenquency individual layer includes:
the dielectric substrate, the metal floor, the MGAA unit, the rectangular parasitic microstrip and the coaxial feeder;
the MGAA unit and the rectangular parasitic microstrip are attached to the upper side of the dielectric substrate, and the metal floor is attached to the lower side of the dielectric substrate; the MGAA unit is in a funnel shape arranged vertically and consists of six sides; the two rectangular parasitic micro-strips are respectively positioned at the left side and the right side of the center of the MGAA unit and are horizontally arranged;
the MGAA unit is funnel-shaped and is positioned in the middle of the medium substrate, and the center of the MGAA unit is connected with the inner conductor of the coaxial feeder for feeding and is used for radiating low-frequency linearly polarized electromagnetic waves;
the rectangular parasitic micro-strips are positioned at the left side and the right side of the center of the MGAA unit and used for radiating high-frequency linear polarized waves.
2. The MGAA unit-based ultra-low profile dual-band single-layer small mobile antenna of claim 1, wherein the MGAA unit edges are rounded structures for expanding bandwidth.
3. The MGAA unit-based ultralow-profile dual-frequency single-layer small-sized mobile antenna of claim 1, wherein the rectangular parasitic microstrip has a length and width of 0.24 λ and 0.06 λ, respectively, and the side of the rectangular parasitic microstrip adjacent to the MGAA unit is subjected to corner cutting treatment to increase the coupling amount.
4. The MGAA unit-based ultralow-profile dual-frequency single-layer small-sized mobile antenna of claim 1, wherein the rectangular parasitic microstrip has the same chamfer angle as the MGAA hypotenuse angle, and is spaced from the MGAA unit by a distance of 0.3mm.
5. The MGAA unit-based ultra-low profile dual frequency single layer small mobile antenna of claim 1, wherein the outer conductor of the coaxial feed is connected to a metal floor, and the inner conductor of the coaxial feed is soldered to the radiating MGAA unit through the dielectric substrate.
6. The MGAA unit-based ultralow-profile dual-frequency single-layer small-sized mobile antenna of claim 1, wherein the MGAA unit and the rectangular parasitic microstrip are both symmetrical structures.
7. The MGAA unit-based ultralow-profile dual-frequency single-layer small-sized mobile antenna of claim 1, wherein the dielectric substrate has a dielectric constant of 3.0, a loss tangent of 0.002 and a profile height of 0.05λ.
8. The MGAA unit-based ultralow-profile dual-frequency single-layer small mobile antenna of claim 1, wherein the metal floor is copper and has a size of 140mm x 70mm.
9. The ultra-low profile dual frequency single layer small mobile antenna based on an MGAA unit according to claim 1, wherein the coaxial feeder is a 50 ohm coaxial feeder, the inner conductor radius of the coaxial feeder is 0.4mm, and the center of the circle is located at the center of two bevel edges of the MGAA unit.
10. The MGAA unit-based ultralow-profile dual-frequency single-layer small mobile antenna of claim 1, wherein the rectangular parasitic microstrip has a length of 9.8mm and a width of 1.4mm.
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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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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2004350046A (en) * | 2003-05-22 | 2004-12-09 | Nippon Dengyo Kosaku Co Ltd | Two-frequency shared antenna |
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| US6429819B1 (en) * | 2001-04-06 | 2002-08-06 | Tyco Electronics Logistics Ag | Dual band patch bowtie slot antenna structure |
| JP2006245917A (en) * | 2005-03-02 | 2006-09-14 | Matsushita Electric Ind Co Ltd | High-frequency substrate |
| KR101014347B1 (en) * | 2010-11-03 | 2011-02-15 | 삼성탈레스 주식회사 | Dual-band dual-polarized microstrip stacked patch array antenna |
| CN102088133A (en) * | 2010-12-13 | 2011-06-08 | 上海大学 | Indoor covering plane antenna in environment of metal ceiling |
| CN103779654B (en) * | 2014-01-14 | 2016-02-03 | 西安电子科技大学 | A kind of double-frequency broadband Bow―tie antenna adopting self similarity feeding technique |
| KR101942343B1 (en) * | 2017-08-30 | 2019-01-25 | 한국과학기술원 | Series-Fed E-shaped Patch Antenna Array with Co-polarized Parasitic Patches |
| CN113410658B (en) * | 2021-06-18 | 2022-12-02 | 安徽大学 | Millimeter wave high-gain grid slot array antenna |
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| JP2004350046A (en) * | 2003-05-22 | 2004-12-09 | Nippon Dengyo Kosaku Co Ltd | Two-frequency shared antenna |
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