CN108539400B - Broadband horizontal polarization omnidirectional antenna - Google Patents
Broadband horizontal polarization omnidirectional antenna Download PDFInfo
- Publication number
- CN108539400B CN108539400B CN201810171967.4A CN201810171967A CN108539400B CN 108539400 B CN108539400 B CN 108539400B CN 201810171967 A CN201810171967 A CN 201810171967A CN 108539400 B CN108539400 B CN 108539400B
- Authority
- CN
- China
- Prior art keywords
- antenna
- microstrip
- plate
- radiation
- fixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
Landscapes
- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a broadband horizontal polarization omnidirectional antenna which is suitable for a wireless communication system and comprises a fixed microstrip plate and four radiation microstrip plates. The radiation microstrip plate is arranged on the fixed microstrip plate according to a certain angle and is arranged in a rotational symmetry mode. The power distribution network is connected with the coupling balun and feeds power to each open slot. The antenna of the present invention can operate over a frequency band of more than 33.3%, and maintain radiation performance similar to a monopole antenna, and is in a horizontally polarized mode. The invention has the advantages of wide working frequency range, convenient installation, simple structure, stable performance, mass production and the like.
Description
Technical Field
The invention relates to an omnidirectional antenna, in particular to a horizontal polarization omnidirectional antenna with a wide frequency band, which is widely applied to wireless communication systems such as mobile communication, satellite communication, radar and the like.
Background
With the rapid development of wireless communication technology, single antenna systems have encountered bottlenecks of increased speed and capacity. Multiple Input Multiple Output (MIMO) technology, one of the key technologies for 4G and future 5G communication systems, can improve channel reliability and channel capacity. Such systems require multiple antenna elements to transmit/receive electromagnetic signals. Typically a MIMO antenna is made up of multiple elements with the same or orthogonal polarizations. For a 360 ° full coverage environment, such as an indoor environment, polarization diversity is of greater concern due to the limited space. The omni-directional radiation pattern is an explicit choice for indoor wireless communication. The vertical polarization monopole antenna is widely used due to the simple structure and the cone beam. However, polarization diversity systems are typically composed of horizontally and vertically polarized antenna elements. Therefore, a horizontally polarized antenna having an omnidirectional radiation characteristic is attracting attention.
The operating bandwidth of the antenna is also one of the important factors that must be considered. The existing wireless communication systems are more, if the antenna can not work in a wide frequency band, the antenna needs to be erected in different systems, and therefore station resources, human resources and the like are wasted greatly. For example, the antenna is expected to be simultaneously used in mobile communication frequency bands of 2G, 3G, 4G and the like and wireless communication systems of Wifi, WLAN and the like, so that repeated construction and installation are avoided, resources such as raw materials are saved, and the operation cost of enterprises is reduced.
Different from the broadband characteristic of the vertical polarization antenna unit, the horizontal polarization antenna unit is generally realized by adopting a current loop mode, but the mode can cause that the impedance of an input port of the horizontal polarization antenna unit is small, the reactance of the horizontal polarization antenna unit is large, and the antenna matching is not facilitated. The conventional method generally adopts an Alford ring structure to form an equivalent current loop, but the working band of the antenna is very narrow, and the antenna cannot be used in broadband mobile communication. If the horizontally polarized antenna has higher gain, the signal coverage effect of the whole wireless communication system is greatly improved.
Disclosure of Invention
The invention aims to overcome the problems of narrow working frequency band and low gain of the traditional horizontal polarization antenna and provides a broadband horizontal polarization omnidirectional antenna with simple structure and convenient feed.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention discloses a broadband horizontal polarization omnidirectional antenna, which comprises a fixed microstrip plate and four radiation microstrip plates fixedly arranged on the edge of the fixed microstrip plate, wherein the angle between the radiation microstrip plates and the fixed microstrip plates is adjustable;
the fixed microstrip plate mainly comprises a first dielectric substrate, a broadband power distribution network and a first metal bottom plate, wherein the broadband power distribution network and the first metal bottom plate are respectively printed on the upper side and the lower side of the first dielectric substrate;
the radiation microstrip board mainly comprises a second medium substrate, a coupling balun and a second metal bottom board, wherein the coupling balun and the second metal bottom board are printed on the upper side and the lower side of the second medium substrate, the second metal bottom board with an opening gap is printed on one surface of the second medium substrate, and the coupling balun is printed on the other surface of the second medium substrate. The antenna is fed from a power distribution network printed on a fixed microstrip board.
Preferably, the widths of the opening slits on the different radiation microstrip plates may be different. The width of the open slot determines the balun feed capability, which can affect the reflection coefficient parameters of the antenna.
The first metal bottom plate of the fixed microstrip plate is electrically communicated with the second metal bottom plate of the radiation microstrip plate.
And the power distribution network on the fixed microstrip plate is electrically communicated with the coupling balun on the radiation microstrip plate.
Preferably, the radiation microstrip plate is perpendicular to the fixed microstrip plate, or an included angle other than 90 ° is formed between the radiation microstrip plate and the fixed microstrip plate, and this angle affects the overall size of the antenna and the size of the aperture of the antenna, and determines the overall gain of the antenna.
Preferably, the four radiating microstrip plates are symmetrically distributed with respect to the center of the fixed microstrip plate.
Preferably, the shape of the fixed microstrip plate is not limited to one of a square, a circle, a triangle or a polygon, and can be adjusted according to a scene.
Preferably, the edge of the fixed microstrip plate is provided with a plurality of slots (15) so as to facilitate the installation of the radiation microstrip plate (2).
Preferably, the dielectric constant and the substrate thickness of the first and second dielectric substrates, the shape and size of the aperture slot, and the size of the power dividing network determine the operating frequency and the radiation characteristics of the antenna, thereby adjusting the antenna performance.
Preferably, the first dielectric substrate and the second dielectric substrate may be the same or different, and the media may be different in material and thickness. The thickness of the medium substrate can be adjusted according to the requirement, and is generally between 0.3mm and 5 mm.
The invention adopts a power division network which mainly comprises 3 one-to-two power dividers. A two-stage distribution is used to generate four output signals with the same amplitude and phase. Because the power dividing network is connected with the coupling balun, the excitation on each oscillator is the same. Because the four oscillators are arranged in a rotating manner, the same current distributions generated on the four oscillators are combined to form a current loop. Having the same current magnitude along the current loop may be equivalent to a magnetic dipole. This results in omnidirectional radiation in the horizontal plane and a cone pattern in the vertical plane.
The invention has the beneficial effects that:
the horizontal polarization antenna has the advantages that on the basis that the working bandwidth can exceed 33%, the out-of-roundness of the horizontal plane directional diagram is less than 2dB, and the cross polarization level value of the horizontal polarization antenna is less than-15 dB. The antenna has a radiation pattern similar to a monopole antenna in the whole working frequency band, namely, the vertical plane pattern has a deeper null, and the horizontal plane pattern keeps the characteristic of omnidirectional radiation and is in a horizontal polarization mode. The invention has the advantages of wide working frequency range, convenient installation, simple structure, stable performance, mass production and the like.
Drawings
Fig. 1 is a schematic diagram of the general structure of the broadband horizontally polarized omnidirectional antenna of the present invention.
Fig. 2 is a schematic diagram of a broadband horizontally polarized omnidirectional antenna fixed microstrip plate of the present invention.
Fig. 3 is a schematic diagram of a broadband horizontally polarized omnidirectional antenna radiating microstrip plate of the present invention.
Fig. 4 is a current distribution diagram of a broadband horizontally polarized omnidirectional antenna of the present invention.
Figure 5 is a graph of the scattering parameters of a broadband horizontally polarized omnidirectional antenna of the present invention.
Fig. 6 is an H-plane radiation pattern of the broadband horizontally polarized omnidirectional antenna of the present invention.
Figure 7 is an E-plane radiation pattern of the broadband horizontally polarized omnidirectional antenna of the present invention.
Figure 8 is a gain diagram for a broadband horizontally polarized omnidirectional antenna of the present invention.
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.
The invention relates to a low-profile dual-band omnidirectional antenna which comprises a fixed microstrip plate (1) and four radiation microstrip plates (2). The fixed microstrip board (1) is composed of a medium substrate (11), a first metal bottom board (12) printed on one side of the medium substrate, and a power distribution network (13) printed on the other side of the medium substrate; the radiation microstrip plate (2) is composed of a dielectric substrate (21) and a second metal bottom plate (23) printed on one side with an opening gap (22), and a coupling balun (24) printed on the other side.
As an optimization of the embodiment of the invention, the electromagnetic wave signal is fed from the fixed microstrip plate (1). The inner core of the coaxial cable or the connector is connected with the input port (14) of the power distribution network (13), and the outer wall of the coaxial cable or the connector is connected with the first metal bottom plate (12). When the antenna is in a transmitting state, signals can be fed from the outside, the signals are divided into four parts of the same signals through the power dividing network (13) on the fixed microstrip board (1), and the four parts of the same signals are coupled into the open slot (22) through the coupling balun (24) connected with the power dividing network (13), so that electromagnetic waves are radiated outwards. Whereas the signal process is reversed if the antenna is used in a receive state.
Fig. 1 is a schematic diagram of the general structure of the broadband horizontally polarized omnidirectional antenna of the present invention. Wherein the radiation microstrip plate (2) can be vertically fixed on the fixed microstrip plate (1) and also can be fixed by inclining a certain angle. Meanwhile, the four radiation microstrip plates (2) are respectively fixed on the periphery of the fixed microstrip plate (1) and are rotationally symmetrical along the central axis.
Fig. 2 is a schematic view of a fixed microstrip plate (1) according to an embodiment of the present invention. In this embodiment, the shape of the fixed microstrip plate (1) is a square. In other different occasions, the outline of the outer shape can be circular, triangular or polygonal. Meanwhile, a part of a slot (15) is reserved on the fixed microstrip plate (1) so as to facilitate the installation of the radiation microstrip plate (2).
Fig. 3 is a schematic view of a radiation microstrip plate (2) according to an embodiment of the present invention. The opening gaps (22) left on the four different second metal bottom plates (23) can be gaps with the same width or gaps with different widths. The coupling balun (24) penetrates through two sides of the open slot (22) to realize coupling feeding to the open slot (22).
Fig. 4 is a current distribution diagram of an embodiment of the present invention. Electromagnetic wave signals pass through the power distribution network (13) and then feed electricity to the four opening gaps (22) through the same signals, so that the current distribution on each radiation microstrip plate (2) is the same. Because the arrangement is rotationally symmetrical, all currents form a square ring.
According to the broadband horizontal polarization omnidirectional antenna, the dielectric substrate (11) and the dielectric substrate (21) can be the same medium or different mediums. The thickness of the medium substrate can be adjusted according to the requirement, and is generally between 0.3mm and 5 mm.
As an optimized solution of the present invention, the power feeding port is fed with a characteristic impedance of 50 Ω.
As a specific embodiment of the invention, the size of the dielectric substrate (1) is phi 84mm multiplied by 1.5mm, and the size of the radiating metal patch is phi 41 mm.
FIG. 5 is a scattering parameter plot for an embodiment of the present invention. The abscissa is frequency (GHz) and the ordinate is decibel value (dB). The antenna can work on a 2.0-2.8 GH frequency band, and the relative bandwidth is 33.3%.
Fig. 6 is an H-plane radiation pattern at 2.0GHz for a specific embodiment of the invention. The H-plane radiation patterns all appear circular, i.e. omnidirectional radiation in the horizontal plane. The out-of-roundness is less than 2.0dB, and the cross polarization is less than-15 dB.
FIG. 7 is an E-plane radiation pattern at 2.0GHz in accordance with an embodiment of the present invention. The E-plane radiation patterns all take on a conical shape with a null greater than 20dB on the broad side.
Fig. 8 is a gain diagram of an embodiment of the present invention. The gain variation range of the antenna is 1.5dBi to 4.5dBi in the whole working frequency band.
As a specific embodiment of the present invention, the antenna can generate equivalent loop current, thereby generating horizontally polarized omnidirectional radiation performance. The relative bandwidth of the working frequency band of the antenna is 33.3%, and the antenna can work in a wide frequency band.
The broadband horizontal polarization omnidirectional antenna can be used for signal transmission of a multi-wireless communication system, can be applied to indoor coverage of a mobile communication system, can be integrated with other equipment, and can also be applied to other similar occasions. The antenna has the advantages of simple structure, easy processing, stable performance and contribution to batch production.
The broadband horizontally polarized omnidirectional antenna is given by way of example only and is not intended to limit the present invention, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (7)
1. A broadband horizontal polarization omnidirectional antenna is characterized by comprising a fixed microstrip plate and four radiation microstrip plates fixedly arranged on the edge of the fixed microstrip plate; wherein the angle between the radiation microstrip plate and the fixed microstrip plate is adjustable;
the fixed microstrip plate mainly comprises a first dielectric substrate, a broadband power distribution network and a first metal bottom plate, wherein the broadband power distribution network and the first metal bottom plate are respectively printed on the upper side and the lower side of the first dielectric substrate; the antenna feeds power from a power distribution network printed on the fixed microstrip board;
the radiation microstrip plate mainly comprises a second medium substrate, a coupling balun printed on the upper side and the lower side and a second metal bottom plate, wherein the second metal bottom plate is provided with an opening gap;
the first metal bottom plate of the fixed microstrip plate is electrically communicated with the second metal bottom plate of the radiation microstrip plate;
the power distribution network on the fixed microstrip plate is electrically communicated with the coupling balun on the radiation microstrip plate and feeds electricity to the opening gap;
the four radiation microstrip plates are symmetrically distributed relative to the center of the fixed microstrip plate;
the edge of the fixed microstrip plate is provided with a plurality of slots so as to facilitate the installation of the radiation microstrip plate;
the power division network is mainly composed of 3 one-to-two power dividers; a two-stage distribution is used to generate four output signals with the same amplitude and phase.
2. The broadband horizontally polarized omnidirectional antenna of claim 1, wherein the widths of the open slots on the different radiating microstrip plates are the same or different; the width of the opening slot determines the balun feeding capability and influences the reflection coefficient parameter of the antenna.
3. The broadband horizontally polarized omnidirectional antenna of claim 1, wherein the radiating microstrip panel forms an angle with the fixed microstrip panel that is 90 ° or not, and the angle affects the overall size of the antenna and the size of the aperture of the antenna, determining the overall gain of the antenna.
4. The broadband horizontally polarized omnidirectional antenna of claim 1, wherein the shape of the fixed microstrip panel includes, but is not limited to, a square, a circle, a triangle, or a polygon.
5. The broadband horizontally polarized omnidirectional antenna of claim 1, wherein the dielectric constant and the thickness of the first and second dielectric substrates, the shape and size of the open slot, and the size of the power dividing network determine the operating frequency and the radiation characteristics of the antenna, thereby adjusting the performance of the antenna.
6. The broadband horizontally polarized omnidirectional antenna of claim 1, wherein the first dielectric substrate and the second dielectric substrate are made of the same or different media, and the media are different in material or thickness.
7. The broadband horizontally polarized omnidirectional antenna of claim 6, wherein the thickness of the dielectric substrate is between 0.3mm ~ 5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810171967.4A CN108539400B (en) | 2018-03-01 | 2018-03-01 | Broadband horizontal polarization omnidirectional antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810171967.4A CN108539400B (en) | 2018-03-01 | 2018-03-01 | Broadband horizontal polarization omnidirectional antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108539400A CN108539400A (en) | 2018-09-14 |
| CN108539400B true CN108539400B (en) | 2020-01-03 |
Family
ID=63486506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810171967.4A Active CN108539400B (en) | 2018-03-01 | 2018-03-01 | Broadband horizontal polarization omnidirectional antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108539400B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110364827B (en) * | 2019-08-01 | 2020-12-18 | 中信科移动通信技术有限公司 | Radiation power distribution circuit board and large-scale array antenna |
| CN112688070B (en) * | 2020-12-21 | 2021-10-22 | 西安电子科技大学 | Distributed multi-point feed broadband vertical polarization omnidirectional antenna |
| CN114759339A (en) * | 2022-04-02 | 2022-07-15 | 深圳市联洲国际技术有限公司 | Omnidirectional radiation horizontal polarization antenna |
| CN116995427B (en) * | 2023-09-28 | 2024-01-26 | 中信科移动通信技术股份有限公司 | Radiating element and base station antenna |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7646343B2 (en) * | 2005-06-24 | 2010-01-12 | Ruckus Wireless, Inc. | Multiple-input multiple-output wireless antennas |
| US20140313093A1 (en) * | 2013-04-17 | 2014-10-23 | Telefonaktiebolaget L M Ericsson | Horizontally polarized omni-directional antenna apparatus and method |
| CN203386887U (en) * | 2013-04-25 | 2014-01-08 | 华为技术有限公司 | Antenna oscillator and antenna equipped with same |
| CN203690485U (en) * | 2013-12-31 | 2014-07-02 | 华南理工大学 | Broadband horizontal polarization omnidirectional antenna |
| CN106025527A (en) * | 2016-05-14 | 2016-10-12 | 上海大学 | Broadband horizontally-polarized omnidirectional antenna with coupled line |
| CN205882158U (en) * | 2016-06-22 | 2017-01-11 | 深圳南方飞讯科技有限公司 | High isolation double polarization omnidirectional antenna |
| CN106099350A (en) * | 2016-07-25 | 2016-11-09 | 上海交通大学 | Low section circular polarisation conical beam antenna |
| CN106299650A (en) * | 2016-09-05 | 2017-01-04 | 哈尔滨工业大学 | L-type loads the wideband omnidirectional circular polarisation printed antenna improving floor |
| CN106785408B (en) * | 2017-01-24 | 2022-10-14 | 桂林电子科技大学 | Broadband low-profile omnidirectional circularly polarized antenna |
| CN107275757B (en) * | 2017-06-06 | 2018-08-21 | 江苏亨鑫科技有限公司 | For the low section band dual polarization radiation appliance in multifrequency antenna for base station |
| CN107508037A (en) * | 2017-07-11 | 2017-12-22 | 上海安费诺永亿通讯电子有限公司 | Base station antenna unit and antenna for base station |
-
2018
- 2018-03-01 CN CN201810171967.4A patent/CN108539400B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108539400A (en) | 2018-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Malviya et al. | A 2× 2 dual-band MIMO antenna with polarization diversity for wireless applications | |
| US20190089069A1 (en) | Broadband phased array antenna system with hybrid radiating elements | |
| CN108539400B (en) | Broadband horizontal polarization omnidirectional antenna | |
| CN107895846B (en) | Circular polarization patch antenna with broadband | |
| CN110224219B (en) | Circularly polarized substrate integrated cavity antenna | |
| CN208690490U (en) | A kind of circular polarized antenna slotted over the ground based on co-planar waveguide | |
| CN205723942U (en) | A kind of circularly polarization microstrip patch antenna with TV university resonance characteristic | |
| CN111864379A (en) | Slot-coupled broadband single-feed circularly-polarized microstrip antenna | |
| Liu et al. | A novel dual-polarized antenna with high isolation and low cross polarization for wireless communication | |
| CN109742540B (en) | Miniaturized high-isolation multi-source multi-beam antenna | |
| Kumar et al. | Design and performance evaluation of a dual-band antenna for the 5G mobile communication | |
| CN113690599B (en) | Horizontal polarization omnidirectional super-surface antenna | |
| Jiang et al. | Design of a wideband quasi-Yagi microstrip antenna with bowtie active elements | |
| Jose et al. | Compact dual-band millimeter-wave antenna for 5G WLAN | |
| CN212303918U (en) | Slot-coupled broadband single-feed circularly-polarized microstrip antenna | |
| CN107799888B (en) | Dual-frequency high-gain patch antenna | |
| CN116581535A (en) | Dual-polarized antenna with high isolation broadband and low profile and use method | |
| CN215989232U (en) | Antenna and antenna array | |
| CN211530177U (en) | Broadband patch antenna loaded with short circuit via hole | |
| Wang et al. | A broadband omnidirectional antenna array for base station | |
| Payne et al. | Ultra-low profile tri-polarized antenna for WLAN/MIMO application | |
| TWI464962B (en) | Hybrid multi-antenna system and wireless communication apparatus using the same | |
| Cao et al. | W-band high-gain low profile circularly polarized magneto-electric dipole antenna array with gap waveguide feeding technology | |
| Guo et al. | Broadband widebeamwidth printed dipole antenna | |
| Karthikeya et al. | Gain compensated conformal antennas with pattern diversity for mmWave 5G smartphones |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |