CN112234355A - Broadband dual-frequency fusion antenna array based on vertical oscillator - Google Patents
Broadband dual-frequency fusion antenna array based on vertical oscillator Download PDFInfo
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- CN112234355A CN112234355A CN202011147574.3A CN202011147574A CN112234355A CN 112234355 A CN112234355 A CN 112234355A CN 202011147574 A CN202011147574 A CN 202011147574A CN 112234355 A CN112234355 A CN 112234355A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent 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
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
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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
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
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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
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
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Abstract
The invention discloses a broadband dual-frequency fusion antenna array based on an upright oscillator, which comprises a reflecting plate, four metal cylinders, four low-frequency antennas and four high-frequency antennas, wherein the low-frequency antennas and the high-frequency antennas are vertically arranged above the reflecting plate, the four high-frequency antennas are arranged around the low-frequency antennas and are symmetrical about the central axis of the low-frequency antennas, and the metal cylinders are arranged on the reflecting plate. The broadband base station antenna array can enable base station antennas working at different frequency bands to share one antenna radiation aperture, eliminate mutual interference and realize the fusion of the base station antennas working at 690-960MHz and 1700-2700 MHz.
Description
Technical Field
The invention relates to the field of mobile communication, in particular to a broadband dual-frequency fusion antenna array based on a vertical oscillator.
Background
With the rapid development of mobile communication technology, the development and utilization of new frequency bands are particularly important, and a base station antenna is an important component of a mobile communication system, is a portal for direct communication between a mobile terminal such as a mobile phone and a base station, and is also an important carrier for realizing the technologies such as frequency reuse, diversity reception and the like of a wireless communication system. At present, there are GSM, 2G, and 3G, LTE (4G) systems in china, the GSM900 system uses 890-960MHz, the CDMA800 system uses 825-880MHz, the 2G system uses 1710-1550MHz, the 3G system uses 1550-2170MHz, the LTE (4G) system uses 2300-2640MHz, and the wireless communication system in china currently covers 825-960 MHz and 1710-2640 MHz. With the development of mobile communication technology, different mobile systems occupy different frequency bands, and it is difficult to implement a bandwidth from 890-2640MHz on one antenna, and the deployment of base station antennas becomes a difficult point. Therefore, the newly designed and installed array antenna simultaneously covers 690-960MHz and 1710-2640MHz and simultaneously supports different mobile communication systems, so as to achieve greater economic benefit.
At present, a broadband base station antenna can generally cover the bandwidth of 2G and 3G, LTE (4G) systems, and does not have the bandwidth covering the GSM system, and if one antenna can work in a plurality of communication systems, the number of antennas can be reduced, the miniaturization of communication equipment is realized, and convenience is brought to the deployment of the base station antenna.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the invention provides a broadband dual-frequency fusion antenna array based on a vertical oscillator.
The invention is an array composed of two different antenna arrays, the radiation gain is high, and the directional diagram is stable, the broadband base station antenna array can make the base station antennas working in different frequency bands share one antenna radiation aperture, eliminate the mutual interference, and realize the integration of the two base station antennas working in 690-plus-960 MHz and 1700-plus-2700 MHz.
The invention adopts the following technical scheme:
the utility model provides a broadband dual-frenquency fuses antenna array based on upright oscillator, includes reflecting plate, metal cylinder, low frequency antenna and high frequency antenna all set up perpendicularly in the top of reflecting plate, high frequency antenna is four, sets up around the low frequency antenna, and the central axis symmetry about the low frequency antenna, and the metal cylinder setting is on the reflecting plate.
The low-frequency antenna further comprises a low-frequency medium substrate, the low-frequency medium substrate comprises a first low-frequency medium substrate and a second low-frequency medium substrate which are crossed, a first low-frequency radiation oscillator and a second low-frequency radiation oscillator are respectively printed on the front surface of the first low-frequency medium substrate and the front surface of the second low-frequency medium substrate, a first low-frequency feeder line and a second low-frequency feeder line are respectively arranged on the back surface of the first low-frequency medium substrate and the back surface of the second low-frequency medium substrate, the first low-frequency radiation oscillator is a + 45-degree polarization oscillator and is fed by the first low-frequency feeder line, the second low-frequency radiation oscillator is a-45-degree polarization oscillator and is fed by the second low-frequency feeder line, each low-frequency radiation oscillator comprises two oscillator arms, each oscillator arm is truncated by two metal choking circles with intervals, and a choking loop structure is printed at.
Further, the choke ring structure comprises two arc-shaped metal sheets which are oppositely arranged and are communicated through a metal strip.
Further, the four high-frequency antennas are identical in structural size and respectively comprise a high-frequency dielectric substrate and a high-frequency feeder line, the front surface of the high-frequency dielectric substrate is provided with a high-frequency radiation oscillator, the back surface of the high-frequency dielectric substrate is provided with the high-frequency feeder line, the high-frequency dielectric substrate comprises a first high-frequency dielectric substrate and a second high-frequency dielectric substrate which are crossed, the high-frequency feeder line comprises a first high-frequency feeder line and a second high-frequency feeder line, the first high-frequency radiation oscillator is a + 45-degree polarization oscillator and is fed by the first high-frequency feeder line, and the second high-frequency radiation oscillator is a-45-degree polarization oscillator.
Further, the diameter of the metal cylinder is 150mm, and the height is 25 mm.
Further, the distance between the reflecting plate and the top end of the low-frequency antenna is 0.1 lambdaL-0.5λLWherein λ isLThe center frequency of the broadband base station antenna is 0.83GHz in free spaceCorresponding to the wavelength.
Further, the distance between the reflecting plate and the top end of the high-frequency antenna is 0.1 lambdaL-0.5λLWherein λ isLThe central frequency of the broadband base station antenna is 2.20GHz corresponding wavelength in free space.
Further, the high-frequency antenna and the low-frequency antenna are both vertically arranged.
Further, the longitudinal distance between the low-frequency antenna and each high-frequency antenna unit is 57.5mm, and the transverse distance is 62.5 mm.
Further, the height of the high-frequency dielectric substrate is smaller than that of the low-frequency dielectric substrate.
The invention has the beneficial effects that:
(1) the bandwidth of the invention completely covers 690-2700 MHz and 1700-2700MHz, and is not only suitable for a 2G/3G/LTE (4G) system but also suitable for a GSM system;
(2) the invention adopts the technical characteristics of low-frequency choking, and solves the coupling problem among antenna arrays;
(3) the radiator of the invention has novel structure, stable directional diagram and high gain.
Drawings
FIG. 1 is a schematic structural view of the present invention
FIG. 2 is a front view of the present invention;
FIG. 3 is a schematic diagram of the high frequency antenna of the present invention;
FIG. 4 is a schematic diagram of a low frequency antenna of the present invention;
FIG. 5(a) is a low frequency reflection coefficient for an embodiment of the present invention;
FIG. 5(b) shows the high-frequency reflection coefficient of the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.
Examples
As shown in fig. 1-4, a broadband dual-frequency fusion antenna array based on a vertical oscillator comprises a low-frequency antenna 1 with an operating frequency band of 690-960MHz, four high-frequency antennas 2 with an operating frequency band of 1700-2700MHz, a reflector plate 3 and a metal cylinder 4, wherein the high-frequency antennas of the antenna array are arranged around the low-frequency antenna and are symmetrical with respect to the center of the low-frequency antenna, the high-frequency antennas are divided into two rows, each row is divided into two rows, the transverse distance between each row and the central axis of the low-frequency antenna is 62.5mm, the longitudinal distance between each row and the central axis of the high-frequency antenna is 57.5mm, the high-frequency antennas and the low-frequency antennas are both supported on the reflector plate by dielectric substrates and are both fed by balun feeder lines, and the metal cylinder is vertically.
The low-frequency antenna comprises a low-frequency medium substrate, the low-frequency medium substrate comprises a first low-frequency medium substrate 8A and a second low-frequency medium substrate 8B which are crossed, a first low-frequency radiation oscillator 1A and a second low-frequency radiation oscillator 1B are respectively printed on the front surface of the first low-frequency medium substrate and the front surface of the second low-frequency medium substrate, a first low-frequency feeder line 6A and a second low-frequency feeder line 6B are respectively arranged on the back surface of the first low-frequency medium substrate and the back surface of the second low-frequency medium substrate, the first low-frequency radiation oscillator is a + 45-degree polarization oscillator and is fed by the first low-frequency feeder line, the second low-frequency radiation oscillator is a-45-degree polarization oscillator and is fed by the second low-frequency feeder line, each low-frequency radiation oscillator arm is cut off by two metal circles which are spaced apart, and a choke structure is printed.
That is, the first low-frequency radiating element and the second low-frequency radiating element are respectively provided with four choke ring structures, and the four choke ring structures on each radiating element are symmetrical about the axis of the low-frequency antenna, so that the antenna array is suitable for a large-scale MIMO array.
The low-frequency radiation oscillator comprises two oscillator arms, each oscillator arm is truncated by two metal circles, and a choke ring structure is printed on the front surface and the back surface of the low-frequency medium substrate at the truncation position. The first low-frequency radiation oscillator and the second low-frequency radiation oscillator are identical in structure and size.
The choke ring structure comprises two arc- shaped metal sheets 5A and 5B which are oppositely arranged and are communicated with each other through a metal strip, and the distance between the two choke rings is about 0.25 lambdaLThe structure has a filtering function, so that high-frequency coupling current on the low-frequency oscillator is greatly reduced.
The four high-frequency antennas are identical in structural size and respectively comprise a high-frequency dielectric substrate and a high-frequency feeder line, the front surface of the high-frequency dielectric substrate is provided with a high-frequency radiation oscillator, the back surface of the high-frequency dielectric substrate is provided with the high-frequency feeder line, the high-frequency dielectric substrate comprises a first high-frequency dielectric substrate 10A and a second high-frequency dielectric substrate 10B which are crossed, the high-frequency feeder line comprises a first high-frequency feeder line 7A and a second high-frequency feeder line 7B, the first high-frequency radiation oscillator 2A is a + 45-degree polarization oscillator and is fed by the first high-frequency feeder line, and the second high-frequency radiation oscillator 2B is a-45-degree polarization oscillator.
The height of the high-frequency dielectric substrate is smaller than that of the low-frequency dielectric substrate. The high-frequency medium substrate and the low-frequency medium substrate are both T-shaped plates, the axial line positions of the two T-shaped plates are crossed, and the left part and the right part are symmetrical about the central axis
The low-frequency antenna is of a vertical structure, so that the dual-polarization bandwidth of 690 and 960MHz can be realized, and the return loss is larger than 15 dB.
The first low-frequency feeder line and the second low-frequency feeder line are perpendicular to each other and intersect with the central axis of the low-frequency medium substrate.
The high-frequency antenna is of a vertical structure, can realize dual-polarization bandwidth of 1700 + 2700MHz, and has return loss larger than 15 dB.
The diameter of the metal cylinder is 150mm at most, and the height is 25 mm.
The distance between the reflecting plate and the top end of the low-frequency antenna is 0.1 lambdaL-0.5λLWherein λ isLThe central frequency of the broadband base station antenna is 0.83GHz corresponding to the wavelength in free space.
The distance between the reflecting plate and the top end of the high-frequency antenna is 0.1 lambdaL-0.5λLWherein λ isLThe central frequency of the broadband base station antenna is 2.20GHz corresponding wavelength in free space.
The dielectric substrate of the low-frequency antenna is made of a high-frequency plate R04350B, the thickness of the high-frequency plate is 1.52mm, and the relative dielectric constant of the high-frequency plate is 3.48.
The dielectric substrate of the high-frequency antenna adopts a high-frequency plate R04350B, the thickness is 0.76mm, and the relative dielectric constant is 3.48.
As shown in fig. 5(a) and 5(b), both low-frequency and high-frequency reflection coefficients allow the normal operation at low frequencies.
The vertical-array broadband dual-frequency-fused base station antenna array has the characteristics of novel structure, large bandwidth, high isolation, stable radiation pattern, high gain and the like.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The utility model provides a broadband dual-frenquency fuses antenna array based on upright oscillator which characterized in that, includes reflecting plate, metal cylinder, low frequency antenna and high frequency antenna all set up perpendicularly in the top of reflecting plate, high frequency antenna is four, sets up around the low frequency antenna, and is symmetrical about the central axis of low frequency antenna, and the metal cylinder sets up on the reflecting plate.
2. The wideband dual-band converged antenna array of claim 1, wherein the low frequency antenna comprises a low frequency dielectric substrate, the low-frequency medium substrate comprises a first low-frequency medium substrate and a second low-frequency medium substrate which are crossed, a first low-frequency radiation oscillator and a second low-frequency radiation oscillator are printed on the front surface of the first low-frequency medium substrate and the front surface of the second low-frequency medium substrate respectively, a first low-frequency feeder line and a second low-frequency feeder line are arranged on the back surface of the first low-frequency medium substrate and the back surface of the second low-frequency medium substrate respectively, the first low-frequency radiation oscillator is a + 45-degree polarization oscillator and is fed by the first low-frequency feeder line, the second low-frequency radiation oscillator is a-45-degree polarization oscillator and is fed by the second low-frequency feeder line, each low-frequency radiation oscillator comprises two oscillator arms, each oscillator arm is cut by two metal circles with intervals, and a choke ring structure is printed at the back surface position of the.
3. The wideband dual-band fusion antenna array of claim 2 wherein the choke loop structure comprises two oppositely disposed arcuate metal pieces, the arcuate metal pieces being interconnected by a metal strip.
4. The broadband dual-frequency fusion antenna array according to claim 2, wherein four high-frequency antennas are identical in structural size and each comprises a high-frequency dielectric substrate and a high-frequency feeder, the front surface of the high-frequency dielectric substrate is provided with a high-frequency radiating element, the back surface of the high-frequency dielectric substrate is provided with a high-frequency feeder, the high-frequency dielectric substrate comprises a first high-frequency dielectric substrate and a second high-frequency dielectric substrate which are crossed, the high-frequency feeder comprises a first high-frequency feeder and a second high-frequency feeder, the first high-frequency radiating element is a + 45-degree polarized element and is fed by the first high-frequency feeder, and the second high-frequency radiating element is a-45-degree polarized element and is fed by the second high-.
5. The broadband dual-frequency converged antenna array of claim 1, wherein the metal cylinder has a diameter of 150mm and a height of 25 mm.
6. The wideband dual-band hybrid antenna array of claim 1, wherein the distance between the reflector plate and the top of the low-frequency antenna is 0.1 λL-0.5λLWherein λ isLThe central frequency of the broadband base station antenna is 0.83GHz corresponding to the wavelength in free space.
7. The wideband dual-band converged antenna array of claim 1, wherein the reflector plate is spaced from the top of the high frequency antenna by a distance of 0.1 λL-0.5λLWherein λ isLThe central frequency of the broadband base station antenna is 2.20GHz corresponding wavelength in free space.
8. The wideband dual-band converged antenna array of claim 1, wherein the high frequency antenna and the low frequency antenna are both vertically disposed.
9. The wideband dual-band converged antenna array of claim 1, wherein the low frequency antennas are spaced apart from each of the high frequency antenna elements by a longitudinal distance of 57.5mm and a lateral distance of 62.5 mm.
10. The broadband dual-frequency converged antenna array of claim 4, wherein the high frequency dielectric substrate has a height less than the low frequency dielectric substrate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011147574.3A CN112234355A (en) | 2020-10-23 | 2020-10-23 | Broadband dual-frequency fusion antenna array based on vertical oscillator |
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| CN202011147574.3A CN112234355A (en) | 2020-10-23 | 2020-10-23 | Broadband dual-frequency fusion antenna array based on vertical oscillator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467364A (en) * | 2021-02-01 | 2021-03-09 | 华南理工大学 | Dual-frequency fusion antenna array, common mode rejection method and communication equipment |
| CN114336007A (en) * | 2021-12-01 | 2022-04-12 | 华南理工大学 | Communication device, array antenna and low-frequency oscillator |
-
2020
- 2020-10-23 CN CN202011147574.3A patent/CN112234355A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467364A (en) * | 2021-02-01 | 2021-03-09 | 华南理工大学 | Dual-frequency fusion antenna array, common mode rejection method and communication equipment |
| CN112467364B (en) * | 2021-02-01 | 2021-05-14 | 华南理工大学 | Dual-frequency fusion antenna array, common mode rejection method and communication equipment |
| CN114336007A (en) * | 2021-12-01 | 2022-04-12 | 华南理工大学 | Communication device, array antenna and low-frequency oscillator |
| CN114336007B (en) * | 2021-12-01 | 2023-02-24 | 华南理工大学 | Communication device, array antenna, and low-frequency oscillator |
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