CN109473771B - Planar omni-directional dipole duplex antenna - Google Patents
Planar omni-directional dipole duplex antenna Download PDFInfo
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- CN109473771B CN109473771B CN201811594901.2A CN201811594901A CN109473771B CN 109473771 B CN109473771 B CN 109473771B CN 201811594901 A CN201811594901 A CN 201811594901A CN 109473771 B CN109473771 B CN 109473771B
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- 239000002184 metal Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 238000002955 isolation Methods 0.000 description 6
- 230000005855 radiation Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000005388 cross polarization Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention provides a planar omni-directional dipole duplex antenna, which comprises: the antenna comprises a dielectric plate, a first resonator, a second resonator, a third resonator, an antenna arm and a metal bottom plate; the first resonator, the second resonator, the third resonator and the antenna arm are arranged on the top surface of the dielectric plate, the metal bottom plate is arranged on the bottom surface of the dielectric plate, and a slot is formed in the metal bottom plate; the slot is formed in the position mapped on the top surface of the dielectric plate to divide the antenna arm equally, the first resonator is of a three-terminal structure, the first end of the first resonator passes through the slot and is positioned on the position mapped on the top surface of the dielectric plate, the second end of the first resonator is opposite to one end of the second resonator, and the third end of the first resonator is opposite to one end of the third resonator; the second resonator is connected with a low-frequency port, and the third resonator is connected with a high-frequency port. The invention carries out fusion design on the duplexer and the antenna, and the first resonator in the invention not only serves as one stage of the filter, but also serves as a feeder line of the antenna, thereby further reducing the size and the loss.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a planar omni-directional dipole duplex antenna.
Background
With the development of 3G, 4G and upcoming 5G, the transceiving duplex becomes more and more important, as this can greatly increase the channel capacity of the communication system.
In a communication system, ensuring that channels are independent and do not interfere with each other is a key for implementing transceiving duplex. In the frequency division duplex system, the receiving and transmitting channels occupy different frequencies respectively, so that the independence of the channels is ensured, the different frequency isolation between the receiving and transmitting antennas is ensured, and the isolation is improved by directly cascading the diplexer with the antennas. This approach does reduce interference and increase capacity, but this approach not only increases the number of devices, but also requires 50 Ω connection lines and corresponding matching networks, which undoubtedly increases the system volume, and also increases losses and costs.
In the prior art, the antenna and the duplexer are fused, one port is removed from each of the antenna and the duplexer to be directly connected, but the method still needs a connecting wire, the feed structure of the antenna and the resonance structure of the duplexer are kept relatively independent, the fusion degree is low, and the size is reduced to a limited extent; meanwhile, the whole structure of the antenna system is complex and the difference loss is large due to the introduction of the duplexer.
Disclosure of Invention
The embodiment of the invention provides a planar omni-directional dipole duplex antenna which is simple and compact in structure and small in loss.
The invention provides a planar omni-directional dipole duplex antenna, which comprises: the antenna comprises a dielectric plate, a first resonator, a second resonator, a third resonator, an antenna arm and a metal bottom plate;
the first resonator, the second resonator, the third resonator and the antenna arm are arranged on the top surface of the dielectric plate, the metal bottom plate is arranged on the bottom surface of the dielectric plate, and a slot is formed in the metal bottom plate;
the slot is formed in the position mapped on the top surface of the dielectric plate and bisects the antenna arm, the first resonator is of a three-terminal structure, the first end of the first resonator penetrates through the slot and is positioned on the position mapped on the top surface of the dielectric plate, the second end of the first resonator is opposite to one end of the second resonator, and the third end of the first resonator is opposite to one end of the third resonator;
the second resonator is connected with a low-frequency port, and the third resonator is connected with a high-frequency port.
Preferably, the first resonator includes: a first L-shaped microstrip line and a second L-shaped microstrip line;
the shorter end of the second L-shaped microstrip line is connected to the longer end of the first L-shaped microstrip line;
the shorter end of the first L-shaped microstrip line is the first end of the first resonator, the longer end of the first L-shaped microstrip line is the second end of the first resonator, and the longer end of the second L-shaped microstrip line is the third end of the first resonator.
Preferably, the connection part of the first L-shaped microstrip line and the second L-shaped microstrip line bisects the first L-shaped microstrip line.
Preferably, the second resonator and the third resonator are each linear microstrip lines.
Preferably, the length of the first L-shaped microstrip line is equal to the length of the second resonator, which is equal to a half wavelength of the center frequency of the low-frequency operating band of the first resonator.
Preferably, the length of the third resonator is equal to half the length of the first L-shaped microstrip line plus the length of the second L-shaped microstrip line, which is equal to half the wavelength of the center frequency of the high-frequency operating band of the first resonator.
Preferably, the low frequency port divides the second resonator into two parts, a longer part being close to the first resonator, a shorter part being far from the first resonator and being a quarter wavelength of a center frequency of a high frequency operating band of the first resonator.
Preferably, the high frequency port divides the third resonator into two parts, a shorter part being close to the first resonator and a longer part being far from the first resonator and being a quarter wavelength of a center frequency of a low frequency operation band of the first resonator.
Preferably, the operating bandwidth of the antenna arm covers the low frequency operating band and the high frequency operating band of the first resonator.
From the above technical solutions, the embodiment of the present invention has the following advantages:
the invention provides a planar omni-directional dipole duplex antenna, which comprises: the antenna comprises a dielectric plate, a first resonator, a second resonator, a third resonator, an antenna arm and a metal bottom plate; the first resonator, the second resonator, the third resonator and the antenna arm are arranged on the top surface of the dielectric plate, the metal bottom plate is arranged on the bottom surface of the dielectric plate, and a slot is formed in the metal bottom plate; the slot is formed in the position mapped on the top surface of the dielectric plate to divide the antenna arm equally, the first resonator is of a three-terminal structure, the first end of the first resonator passes through the slot and is positioned on the position mapped on the top surface of the dielectric plate, the second end of the first resonator is opposite to one end of the second resonator, and the third end of the first resonator is opposite to one end of the third resonator; the second resonator is connected with a low-frequency port, and the third resonator is connected with a high-frequency port. The invention carries out fusion design on the duplexer and the antenna, and the first resonator in the invention not only serves as one stage of the filter, but also serves as a feeder line of the antenna, thereby further reducing the size and the loss.
Furthermore, the invention is realized by the printed dielectric plate, does not need to metalize via holes, has simple structure, is beneficial to mass production, and realizes the omnidirectional radiation of the antenna by utilizing dipoles.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an embodiment of a planar omni-directional dipole duplex antenna according to the present invention;
fig. 2 is another schematic structural diagram of an embodiment of a planar omni-directional dipole duplex antenna according to the present invention;
fig. 3 is a schematic diagram of bandpass filtering characteristics of a planar omni-directional dipole duplex antenna according to the present invention;
fig. 4 is a gain simulation result diagram of a planar omni-directional dipole duplex antenna provided by the invention;
FIG. 5 is a simulated E-plane directional diagram of a planar omni-directional dipole duplex antenna low-frequency port at 2.1 GHz;
FIG. 6 is a simulated H-plane directional diagram of a planar omni-directional dipole duplex antenna low-frequency port at 2.1 GHz;
FIG. 7 is a simulated E-plane directional diagram of a high-frequency port of a planar omni-directional dipole duplex antenna at 2.32 GHz;
fig. 8 is a simulated H-plane directional diagram of a high-frequency port of a planar omni-directional dipole duplex antenna provided by the invention at 2.32 GHz.
Detailed Description
The embodiment of the invention provides a planar omni-directional dipole duplex antenna which is simple and compact in structure and small in loss.
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and 2, the present invention provides a planar omni-directional dipole duplex antenna, comprising: a dielectric plate 1, a first resonator, a second resonator, a third resonator, an antenna arm 5 and a metal bottom plate 6;
the first resonator, the second resonator, the third resonator and the antenna arm 5 are arranged on the top surface of the dielectric plate 1, the metal bottom plate 6 is arranged on the bottom surface of the dielectric plate 1, and the metal bottom plate 6 is provided with a slot 7;
the slot 7 bisects the antenna arm 5 at the location where the top surface of the dielectric plate 1 is mapped, it being understood that the antenna arm 5, which is thick at both ends, is orthogonal to the slot 7 and is perpendicularly bisected by the corresponding location where the slot 7 is mapped on the top surface of the dielectric plate 1.
The first resonator is of a three-terminal structure, a first end of the first resonator passes through a position mapped on the top surface of the dielectric plate 1 by the slot 7, a second end of the first resonator is opposite to one end of the second resonator, and a third end of the first resonator is opposite to one end of the third resonator;
the second resonator is connected with a low-frequency port 8, and the third resonator is connected with a high-frequency port 9. It should be noted that the two ports may be 50Ω microstrip lines.
The invention carries out fusion design on the duplexer and the antenna, and the first resonator in the invention not only serves as one stage of the filter, but also serves as a feeder line of the antenna, thereby further reducing the size and the loss.
Still further, the first resonator includes: a first L-shaped microstrip line 21 and a second L-shaped microstrip line 22. The length of the first L-shaped microstrip line 21 determines the low frequency operating band of the first resonator, and is typically a half wavelength of the center frequency of the low frequency operating band. The sum of the half length of the first L-shaped microstrip line 21 and the length of the second L-shaped microstrip line 22 determines the high frequency operating band of the first resonator, which is typically half wavelength of the center frequency of the high frequency operating band.
The shorter end of the second L-shaped microstrip line 22 is connected to the longer end of the first L-shaped microstrip line 21.
The shorter end of the first L-shaped microstrip line 21 is the first end of the first resonator, the longer end of the first L-shaped microstrip line 21 is the second end of the first resonator, and the longer end of the second L-shaped microstrip line 22 is the third end of the first resonator.
As shown in fig. 1, the shorter end of the first L-shaped microstrip line 21 passes through the slot 7, and the longer end is opposite to the second resonator, and is coupled to each other. The shorter end of the second L-shaped microstrip line 22 is connected to the middle of the longer end of the first L-shaped microstrip line 21, and the longer end of the second L-shaped microstrip line 22 is opposite to the third resonator and coupled to each other.
Further, the junction of the first L-shaped microstrip line 21 and the second L-shaped microstrip line 22 bisects the first L-shaped microstrip line 21.
Further, the second resonator and the third resonator are each linear microstrip lines.
Further, the length of the first L-shaped microstrip line 21 is equal to the length of the second resonator, which is equal to half the wavelength of the center frequency of the low frequency operation band of the first resonator. The second resonator has the same resonant frequency as the low-frequency resonant frequency of the first resonator.
Further, the length of the third resonator is equal to half the length of the first L-shaped microstrip line 21 plus the length of the second L-shaped microstrip line, which is equal to half the wavelength of the center frequency of the high frequency operating band of the first resonator. The resonance frequency of the third resonator is the same as the high frequency resonance frequency of the first resonator.
Further, the low frequency port 8 divides the second resonator into two parts, the longer part 31 being close to the first resonator and coupled to the second end of the first resonator. The shorter portion 32 is remote from the first resonator for increasing isolation from the high frequency port 9 and the length of the shorter portion 32 is one quarter wavelength of the centre frequency of the high frequency operating band of the first resonator.
Further, the high frequency port 9 divides the third resonator into two parts, the shorter part 41 being close to the first resonator and coupled to the third end of the first resonator. The longer portion 42 is remote from the first resonator for increased isolation from the low frequency port 8 and the length of the longer portion 42 is one quarter wavelength of the centre frequency of the low frequency operating band of the first resonator.
Further, the operating bandwidth of the antenna arm 5 covers the low frequency operating band and the high frequency operating band of the first resonator.
Further, the width of the metal base plate 6 is narrower, which is less than half the total length of the antenna arm 5, which generates broadband radiation, with a thin middle and thick ends.
The working process of the planar omni-directional dipole duplex antenna provided by the invention is described as follows:
when transmitting signals, the low-frequency port receives signals input by the signal source, is coupled to the first resonator through the second resonator, and is coupled to the antenna arm through the slot to be transmitted. When receiving signals, the antenna arm receives signals, is coupled to the first resonator through a slot, and is coupled to the third resonator to transmit the signals from the high-frequency port to the target receiving end.
In order to explain the principle and effect of the present invention, the working principle of the specific embodiment of the planar duplex antenna is described in detail below, and simulation results are also given.
Referring to fig. 3, a planar omni-directional dipole duplex antenna according to an embodiment of the present invention has a good band-pass filtering characteristic. The two ports have high isolation;
fig. 4 shows a simulation result diagram of gain of a specific embodiment of a planar omni-directional dipole duplex antenna. The resulting graph of fig. 4 shows that the planar duplex antenna has higher gain, indicating smaller difference, and higher rejection in one frequency band when the antenna is operating in the other frequency band.
Fig. 5-6 are simulated patterns of a planar omni-directional dipole duplex antenna low frequency port (low frequency band) at 2.1 GHz. Fig. 7-8 are simulated patterns of a planar duplex antenna high frequency port (high frequency band) at 2.32 GHz.
In a word, the planar omni-directional dipole duplex antenna provided by the invention has a good filtering effect and a low cross polarization ratio for the current practical application. Due to the fusion design of the antenna and the filter, the introduced insertion loss is small, the radiation performance and the radiation efficiency of the antenna are good, the average gain in the passband can reach about 1.5dBi, the cross polarization ratio can reach 10dB, and the isolation between two ports can reach 25dB. It is worth mentioning that the specific embodiment of the invention has better application value.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A planar omni-directional dipole duplex antenna, comprising: the antenna comprises a dielectric plate, a first resonator, a second resonator, a third resonator, an antenna arm and a metal bottom plate;
the first resonator, the second resonator, the third resonator and the antenna arm are arranged on the top surface of the dielectric plate, the metal bottom plate is arranged on the bottom surface of the dielectric plate, and a slot is formed in the metal bottom plate;
the slot is formed in the position mapped on the top surface of the dielectric plate and bisects the antenna arm, the first resonator is of a three-terminal structure, the first end of the first resonator penetrates through the slot and is positioned on the position mapped on the top surface of the dielectric plate, the second end of the first resonator is opposite to one end of the second resonator, and the third end of the first resonator is opposite to one end of the third resonator;
the second resonator is connected with a low-frequency port, and the third resonator is connected with a high-frequency port;
the first resonator includes: a first L-shaped microstrip line and a second L-shaped microstrip line;
the shorter end of the second L-shaped microstrip line is connected to the longer end of the first L-shaped microstrip line;
the shorter end of the first L-shaped microstrip line is a first end of the first resonator, the longer end of the first L-shaped microstrip line is a second end of the first resonator, and the longer end of the second L-shaped microstrip line is a third end of the first resonator;
the working process of the planar omni-directional dipole duplex antenna specifically comprises the following steps:
when transmitting signals, the low-frequency port receives signals input by the signal source, is coupled to the first resonator through the second resonator, and is coupled to the antenna arm through the slot to be transmitted; when receiving signals, the antenna arm receives signals, is coupled to the first resonator through a slot, and is coupled to the third resonator to transmit the signals from the high-frequency port to the target receiving end.
2. The planar omni-directional dipole duplex antenna according to claim 1, wherein a junction of said first L-shaped microstrip line and said second L-shaped microstrip line bisects said first L-shaped microstrip line.
3. The planar omni-directional dipole duplex antenna according to claim 2, wherein said second resonator and said third resonator are each a linear microstrip line.
4. A planar omni-directional dipole duplex antenna according to claim 3, wherein the length of said first L-shaped microstrip line is equal to the length of said second resonator, which is equal to half the wavelength of the center frequency of the low frequency operating band of said first resonator.
5. The planar omni-directional dipole duplex antenna according to claim 4, wherein a length of said third resonator is equal to half a length of said first L-shaped microstrip line plus a length of said second L-shaped microstrip line, which is equal to half a wavelength of a center frequency of a high frequency operating band of said first resonator.
6. The planar omni-directional dipole duplex antenna according to claim 5, wherein said low-frequency port divides said second resonator into two portions, a longer portion being proximate said first resonator and a shorter portion being distal said first resonator and being one quarter wavelength of a center frequency of a high-frequency operating band of said first resonator.
7. The planar omni-directional dipole duplex antenna according to claim 6, wherein said high-frequency port divides the third resonator into two portions, a shorter portion being proximate said first resonator and a longer portion being distal said first resonator and being one quarter wavelength of a center frequency of a low frequency operating band of said first resonator.
8. The planar omni-directional dipole duplex antenna according to any of claims 1-7, wherein an operating bandwidth of said antenna arm covers a low frequency operating band and a high frequency operating band of said first resonator.
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| CN201811594901.2A CN109473771B (en) | 2018-12-25 | 2018-12-25 | Planar omni-directional dipole duplex antenna |
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| CN201811594901.2A CN109473771B (en) | 2018-12-25 | 2018-12-25 | Planar omni-directional dipole duplex antenna |
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| CN109473771B true CN109473771B (en) | 2023-12-15 |
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| CN110336130B (en) * | 2019-04-29 | 2021-08-31 | 中天宽带技术有限公司 | Dipole filtering antenna and electronic equipment |
| CN117199771A (en) * | 2022-05-30 | 2023-12-08 | 华为技术有限公司 | Antenna and base station |
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