CN111293433A - Flexible hexagonal ultra-wideband antenna - Google Patents
Flexible hexagonal ultra-wideband antenna Download PDFInfo
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- CN111293433A CN111293433A CN202010198058.7A CN202010198058A CN111293433A CN 111293433 A CN111293433 A CN 111293433A CN 202010198058 A CN202010198058 A CN 202010198058A CN 111293433 A CN111293433 A CN 111293433A
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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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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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
Abstract
The invention relates to a flexible hexagonal ultra-wideband antenna which comprises a substrate, an antenna patch and a coplanar waveguide ground plane, wherein the antenna patch is a hexagonal patch, a groove is formed in the middle of the antenna patch, and the groove is positioned in a hexagon and close to a feeder line of the antenna. Compared with the prior art, the invention adopts a feeding mode of coplanar waveguide feeding. The antenna unit is a hexagonal antenna, the middle part of the patch is subjected to grooving treatment, and the grooving is close to the joint of the feeder and the patch and can influence the energy conduction of the feeder to the patch, so that the frequency bandwidth of the antenna is influenced, and the antenna unit has ultra-wideband performance and is very wide in application.
Description
Technical Field
The invention relates to a wireless communication antenna, in particular to a flexible hexagonal ultra-wideband antenna.
Background
With the rapid development of wireless communication networks and electronic communication products in the world, people have increasingly high demands on antenna performance as a key part of wireless communication networks and electronic communication products.
In 2 months in 2013, the european union announced that 5000 ten thousand euros of the withdrawal were dedicated to the development of the fifth generation mobile communication technology (5G), which is expected to be popularized and commercialized in 2020. The 5G technology aims to increase the capacity of the existing 4G system by 1000 times and increase the spectrum and energy utilization rate and the transmission rate by 10 times, namely, to achieve the peak rate of 10Gbits/s in a low-mobility environment and the peak rate of 1Gbits/s in a high-mobility environment. The 5G transmission is not simply upgraded in the 4G network, but is a brand new communication mode for realizing the speed experience of the gigabit user by utilizing technologies such as a large-scale antenna array, millimeter waves, ultra-dense cell networking and the like. Currently, there are three main technical development directions for 5G internationally recognized: novel multi-antenna transmission, high-density network and high-frequency band transmission. High-frequency band transmission is one of the most important core technologies in novel multi-antenna transmission and is also a main research object of the invention.
The fifth generation mobile communication system is coming into formal business in the near future. One of the key indicators of 5G is the higher transmission rate. However, there are two main methods for increasing the transmission rate: the frequency spectrum utilization rate is increased, and the frequency spectrum bandwidth is increased. Increasing the spectral bandwidth is simpler and more straightforward than increasing the spectral utilization. However, the existing frequency band below 5GHz is crowded, and few empty spectrum resources are available, so millimeter-wave band technology is proposed.
The millimeter wave microstrip antenna has the characteristics of millimeter wave bands which are quite obvious, for example, the millimeter wave microstrip antenna has the advantages of short wavelength, wide frequency band and good transmission characteristics in extreme environments such as foggy days, snow days and dust. Since its generation, microstrip antennas have received much attention from antenna researchers around the world. The wavelength of millimeter wave band is shorter, so the size of the antenna can be made smaller, and the structure is more compact. In addition, the antenna with millimeter wave band can generate narrower wave beam width, and the resolution and the precision are improved; the ground multipath effect and clutter echo level are reduced, and the capability of tracking a low elevation target is improved; interference from other than beam directions can be eliminated; the gain of the antenna is improved, and the requirements on the peak value and the average power of the transmitter are reduced.
Due to the advantages, the research of millimeter waves has great significance in the aspects of communication, radar, guidance, remote sensing technology and radio astronomy
Disclosure of Invention
The invention aims to provide a flexible hexagonal ultra-wideband antenna with a high antenna frequency range and a small size in order to overcome the defect of frequency band congestion in the prior art.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a flexible hexagonal ultra wide band antenna, includes base plate, antenna paster and coplanar waveguide ground plane, the antenna paster be the hexagonal paster, there is the excavation in antenna paster middle part, the excavation be located the hexagon, be close to the feeder department of antenna.
The grooves are convex, and the convex parts point to the feeder lines.
The antenna patch is a hexagonal patch with cut edges and a notch.
The cut portions are located at the corners of the hexagon.
The vertex angle of the notch is a right angle.
The coplanar waveguide grounding surfaces are symmetrically arranged on two sides of a feeder line of the antenna and are in a right trapezoid shape.
The hexagonal patch is of an asymmetric structure.
The substrate material is LCP.
Compared with the prior art, the invention has the following advantages:
(1) the antenna unit is a hexagonal antenna, the middle part of the patch is subjected to grooving treatment, and the grooving is close to the connection part of the feeder and the patch, so that the energy conduction of the feeder to the patch can be influenced, and the frequency bandwidth of the antenna is influenced.
(2) For the hexagonal structure of the patch, the current distribution of the antenna can be changed and the frequency range of the antenna can be expanded by changing the edge structure of the patch and carrying out some cutting treatments.
(3) In order to further improve and expand the frequency range of the antenna, the coplanar waveguide grounding surface is subjected to gradient processing (specifically, right trapezoid), and the shape of the grounding surface of the antenna is changed, so that the current distribution on the surface of a part of the floor is changed.
(4) The dielectric substrate material of the antenna uses Liquid Crystal Polymer (LCP). At present, in the field of microwave and millimeter wave circuits, Liquid Crystal Polymer (LCP) has excellent application prospect as a novel flexible substrate material. LCP has many excellent characteristics, including low thermal expansion coefficient, low cost, low loss, etc., and the dielectric constant of LCP is very stable over a wide enough frequency range, which makes LCP the best choice for low cost, high performance, small size device design.
Particularly in the wearable field, the Liquid Crystal Polymer (LCP) material is used as a flexible material, has excellent flexibility, can be bent freely and covers the surface of a carrier, and therefore has excellent and development prospect.
(4) The coplanar waveguide is used as a microwave planar transmission line with excellent performance and convenient processing, plays an increasingly larger role in an MMIC circuit, and particularly has incomparable performance advantages compared with a microstrip line when reaching a millimeter wave frequency band. Compared with the conventional microstrip transmission line, the coplanar waveguide has the advantages of easy manufacture, easy realization of series connection and parallel connection of passive and active devices in a microwave circuit (without perforating on a substrate), easy improvement of circuit density and the like.
(5) Ultra-wideband performance: the antenna has the working frequency range of 5.2-42GHz after simulation test, can meet the requirements of C wave frequency band (4-8GHz), WLAN (5.2-5.8GHz), X wave frequency band (8-12GHz), Ku wave frequency band (12-18GHz), K wave frequency band (18-27GHz), Ka wave frequency band (27-40GHz) and 5G millimeter wave frequency band, and is very wide in application.
Drawings
Fig. 1 is a schematic structural diagram of an antenna according to the present embodiment;
fig. 2 shows the simulation result of S11 of the antenna of the present embodiment;
reference numerals:
1 is a substrate; 2 is an antenna patch; 3 is a feeder line; and 4, a coplanar waveguide ground plane.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Examples
As shown in fig. 1, the flexible hexagonal ultra-wideband antenna comprises a substrate, an antenna patch and a coplanar waveguide ground plane, wherein the antenna patch is a hexagonal patch, a groove is formed in the middle of the antenna patch, and the groove is located in a hexagon and close to a feeder line of the antenna.
The digging groove is convex, and the convex part points to the feeder line.
The edges of the top corners of the antenna patches are cut and provided with notches, the top corners of the notches are right angles, specifically, one notch is positioned at the left end of the top side and is a square, and three sides of the notch are positioned in a hexagon; the other two are symmetrical and positioned at the top angles of the left side and the right side and are right-angled triangles, and the two right-angled sides are positioned in the hexagon.
A central conductor strip is produced on one face of a dielectric substrate and conductor planes are produced on both sides of the immediate vicinity of the central conductor strip, thus forming a coplanar waveguide, also called a coplanar microstrip transmission line. Coplanar waveguides propagate TEM waves without a cut-off frequency. Because the central conductor and the conductor plate are positioned in the same plane, it is convenient to install components on the coplanar waveguide in parallel, and a monolithic microwave integrated circuit with the transmission line and the components on the same side can be manufactured by using the coplanar waveguide. . The coplanar waveguide has the advantages of small volume, light weight and planar structure, so that linear polarization, circular polarization, dual polarization, multi-band operation and the like are convenient to obtain, and the coplanar waveguide is widely applied to modern wireless communication.
The coplanar waveguide is used as a microwave planar transmission line with excellent performance and convenient processing, plays an increasingly larger role in an MMIC circuit, and particularly has incomparable performance advantages compared with a microstrip line when reaching a millimeter wave frequency band. Compared with the conventional microstrip transmission line, the coplanar waveguide has the advantages of easy manufacture, easy realization of series connection and parallel connection of passive and active devices in a microwave circuit (without perforating on a substrate), easy improvement of circuit density and the like.
The coplanar waveguide grounding surfaces are symmetrically arranged on two sides of the feeder line of the antenna and are in a right trapezoid shape. The effective working frequency range of the antenna can be remarkably enlarged and the radiation performance of the antenna can be improved by carrying out gradual change treatment on the coplanar waveguide structure.
The dielectric substrate material uses Liquid Crystal Polymer (LCP), has excellent flexibility, can be bent freely and covers the surface of the carrier.
As shown in FIG. 2, through simulation tests, the obtained antenna has a working frequency range of 5.2-42GHz, can meet the requirements of a C-wave frequency band (4-8GHz), a WLAN (5.2-5.8GHz), an X-wave frequency band (8-12GHz), a Ku-wave frequency band (12-18GHz), a K-wave frequency band (18-27GHz), a Ka-wave frequency band (27-40GHz) and a 5G millimeter wave frequency band, and is very wide in application.
Claims (8)
1. The flexible hexagonal ultra-wideband antenna comprises a substrate, an antenna patch and a coplanar waveguide ground plane, and is characterized in that the antenna patch is a hexagonal patch, a groove is formed in the middle of the antenna patch, and the groove is located in a hexagon and close to a feeder line of the antenna.
2. The flexible hexagonal ultra-wideband antenna of claim 1, wherein the cutouts are raised and the protrusions are directed toward the feed line.
3. The flexible hexagonal ultra-wideband antenna of claim 1, wherein the antenna patch is a hexagonal patch with a cut edge and a notch.
4. A flexible hexagonal ultra-wideband antenna according to claim 3, characterized in that the cut parts are located at the corners of the hexagon.
5. The flexible hexagonal ultra-wideband antenna of claim 3, wherein the top corners of the notch are all right angles.
6. The flexible hexagonal ultra-wideband antenna of claim 1, wherein the coplanar waveguide ground planes are symmetrically disposed on both sides of the antenna feed line and have a right trapezoid shape.
7. The flexible hexagonal ultra-wideband antenna of claim 1, wherein the hexagonal patch is asymmetric.
8. The flexible hexagonal ultra-wideband antenna of claim 1, wherein the substrate material is LCP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010198058.7A CN111293433A (en) | 2020-03-19 | 2020-03-19 | Flexible hexagonal ultra-wideband antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010198058.7A CN111293433A (en) | 2020-03-19 | 2020-03-19 | Flexible hexagonal ultra-wideband antenna |
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| CN111293433A true CN111293433A (en) | 2020-06-16 |
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| CN202010198058.7A Pending CN111293433A (en) | 2020-03-19 | 2020-03-19 | Flexible hexagonal ultra-wideband antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20240030609A1 (en) * | 2021-05-06 | 2024-01-25 | Anhui University | Four-notch flexible wearable ultra-wideband antenna fed by coplanar waveguide |
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2020
- 2020-03-19 CN CN202010198058.7A patent/CN111293433A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20240030609A1 (en) * | 2021-05-06 | 2024-01-25 | Anhui University | Four-notch flexible wearable ultra-wideband antenna fed by coplanar waveguide |
| US11955735B2 (en) * | 2021-05-06 | 2024-04-09 | Anhui University | Four-notch flexible wearable ultra-wideband antenna fed by coplanar waveguide |
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