CN202503102U - Compact type high-isolation ultra-wideband dual-waveband antenna - Google Patents
Compact type high-isolation ultra-wideband dual-waveband antenna Download PDFInfo
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- CN202503102U CN202503102U CN2012201223840U CN201220122384U CN202503102U CN 202503102 U CN202503102 U CN 202503102U CN 2012201223840 U CN2012201223840 U CN 2012201223840U CN 201220122384 U CN201220122384 U CN 201220122384U CN 202503102 U CN202503102 U CN 202503102U
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 39
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- 239000000758 substrate Substances 0.000 claims abstract description 25
- 230000009977 dual effect Effects 0.000 claims description 12
- 239000007769 metal material Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 4
- 230000005855 radiation Effects 0.000 description 14
- 238000004891 communication Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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Abstract
The utility model discloses a compact ultra-wideband dual-waveband antenna with high isolation. The compact ultra-wideband dual-waveband antenna with high isolation comprises an antenna substrate (1) and three radiating elements, wherein the three radiating elements and the substrate (1) are in the same horizontal plane, the three radiating elements are placed side by side, and the bottom surface of the substrate (1) serves as a ground plane; a first radiating element (3) consists of an L-shaped metal strip and a semicircular metal block which are connected with each other; a second radiating element (4) consists of an S-shaped metal strip and a rectangular metal block which are connected with each other; a third radiating element (5) consists of an L-shaped metal strip and an elliptic metal block which are connected with each other; the first radiating element (3) and the third radiating element (5) are symmetrically arranged on two sides of the second radiating element (4) respectively; and feed ends of the three radiating elements are connected with the substrate respectively. A double-feed three-radiating-element antenna technique is adopted, so that the antenna can work at two wavebands, the coupling degree is less than -15dB (the corresponding isolation is greater than 15dB), the standing-wave ratio is less than 2, the gain is about 4dBi, and the antenna efficiency is greater than 65 percent.
Description
Technical Field
The utility model relates to a novel high isolation ultra wide band dual waveband antenna, specifically speaking are compact high isolation ultra wide band dual waveband antenna, belong to the contrary F antenna field in plane.
Background
With the trend of electronic devices toward miniaturization and miniaturization, and the application of spread spectrum and frequency hopping techniques, the demand for broadband and miniaturization of communication equipment is increasing. UWB (ultra-wideband) communication has many advantages such as large communication capacity, good confidentiality, small average power density, strong anti-multipath interference capability, etc., and is an important development direction of communication systems in the 21 st century, and its development also requires an ultra-wideband antenna technology adapted thereto. The design of the ultra-wideband antenna is a main research direction of the ultra-wideband communication technology, and the ultra-wideband antenna is widely applied to systems such as wireless communication, wireless access, electronic countermeasure and the like.
The traditional ultra-wideband antenna such as a log-periodic antenna, an equiangular spiral Archimedes spiral antenna and the like has the advantages that the feed network is complex in design and large in size, does not meet the miniaturization requirement of low-power short-distance personal communication application on the ultra-wideband antenna, is unfixed in phase center, and has serious distortion when being applied to a pulse radio system for transmitting time-domain short pulse signals.
The inverse F antenna has small mass and easy integration of a plane structure, and the antenna frequency band can cover a plurality of communication frequency bands, thereby reducing the number of antennas required by a communication system, further reducing the manufacturing cost of the system and being beneficial to the electromagnetic compatibility of the system. Therefore, compared with the traditional ultra-wideband antenna, the inverse F antenna has a research prospect and practical significance.
Wireless local area networks based on the IEEE802.11 standard allow for free wireless connectivity in a local area network environment using unlicensed 2.4GHz or 5.3GHz radio frequency bands. In practical applications, the 2.4GHz band is often crowded, and thus a dual-band ultra-wideband operating antenna has been proposed. The antenna can work in 2.4GHz and 5.3GHz wave bands at the same time, and the capacity and the quality of local area network wireless communication are greatly improved. However, the frequency difference between the 5.3GHz band and the 2.4GHz band of the dual-band antenna is almost 2 times, so that the dual-band antenna has strong mutual coupling, and the antenna cannot normally work under the dual-band simultaneously. At present, the antenna with two radiating elements is generally designed to work in 5.3GHz and 2.4GHz bands respectively. To improve the isolation, the spacing between 2 radiating elements is usually increased, but this greatly increases the size of the antenna and the standing-wave ratio coefficient is large. Designing a compact ultra-wideband dual-band antenna with high isolation is therefore key to solving this problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem to provide a can realize the compact ultra wide band antenna of dual band (2.4 GHz and 5.3 GHz) work under high isolation (< -15 dB) to not enough in the background art.
The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme:
a compact high-isolation dual-band ultra-wideband antenna comprises an antenna substrate and three radiating elements which are positioned in the same horizontal plane with the substrate and are mutually arranged side by side, wherein the bottom surface of the substrate is used as a ground plane; the first radiating element is formed by connecting an L-shaped metal strip and a semicircular metal block, and the semicircular metal block is the radiating tail end of the first radiating element; the second radiating element is formed by connecting an S-shaped metal strip with a rectangular metal block, and the rectangular metal block is the radiating tail end of the second radiating element; the third radiating element is formed by connecting an L-shaped metal strip and an oval metal block, and the oval metal block is the radiating tail end of the third radiating element; the first radiating element and the third radiating element are symmetrically arranged on two sides of the second radiating element respectively, and feed ends of the three radiating elements are connected with the substrate respectively.
Further, the utility model discloses a compact high isolation dual band ultra wide band antenna, first radiating element work is at 2.4GHz wave band, and third radiating element work is at 5.3GHz wave band, and second radiating element work is at 4.2GHz wave band.
Further, the utility model discloses a high isolation dual waveband ultra wide band antenna of compact, the antenna substrate is made with metal material, and thickness is at 0.2mm ~0.5mm, and the edge bilateral symmetry that is located the base plate is provided with two coaxial cable welded fastening points.
Further, the utility model discloses a compact high isolation dual band ultra wide band antenna, first radiating element and second radiating element adopt coaxial cable feed and a feed end of sharing, and the feed end is located the junction of the L shape metal strip of first radiating element and the S shape metal strip of second radiating element.
Further, the utility model discloses a compact high isolation dual waveband ultra wide band antenna, third radiating element adopts the coaxial cable feed, and the feed end is located and constitutes the L shape metal strip of third radiating element and the junction of oval metal block.
The utility model adopts the above technical scheme to compare with prior art, have following technological effect:
the utility model discloses a three radiating element antenna technique, its compact structure make whole UWB antenna can work at dual-band (2.4 GHz and 5.3 GHz), and the isolation is less than-15 dB, and the standing-wave ratio is less than 2, and the gain is about 4dBi, and antenna efficiency is greater than 65%.
Drawings
FIG. 1 is a schematic plan view of a dual band UWB antenna.
Fig. 2 is a schematic plan view of the antenna substrate.
Fig. 3 is a schematic plan view of the radiating elements 3, 4.
Fig. 4 is a schematic plan view of the radiating element 5.
Fig. 5 is a graph of S-parameters in the case where the feeding end of the radiating element 3 or 4 is a P1 port and the feeding end of the radiating element 5 is a P2 port.
Fig. 6 is a standing wave ratio graph in the case where the feeding end of the radiating element 3 or 4 is a P1 port and the feeding end of the radiating element 5 is a P2 port.
Detailed Description
The technical scheme of the utility model is further explained in detail with the attached drawings as follows:
as shown in fig. 1, the ultra-wideband antenna of the present invention includes an antenna substrate 1 and three radiating elements disposed side by side with the substrate 1 in the same horizontal plane, wherein the feeding end of the three radiating elements is connected with the substrate respectively.
The radiating element 3 is formed by connecting an L-shaped metal strip and a semicircular metal block, and the semicircular metal block is the radiating tail end of the radiating element 3. The radiating element 4 is formed by connecting an S-shaped metal strip to a rectangular metal block, which is the radiating end of the radiating element 4. The radiating element 5 is formed by connecting an L-shaped metal strip with an oval metal block, which is the radiating end of the radiating element 5.
Through the special design of the structure of each radiating element, the current distribution on the surface of the radiating element can be effectively improved, and then the radiation field distribution excited by the surface current is improved, so that the isolation of the antenna in two working wave bands is improved. In addition, different radiation impedances are formed by different radiation element structure designs, and the standing wave ratio of the antenna in the working waveband can be further reduced.
The radiation elements 3 and 5 are symmetrically arranged on both sides of the radiation element 4, so that the isolation between the radiation elements 3 and 5 can be improved and the standing wave ratio can be reduced.
The antenna substrate 1 can be made of metal materials such as copper plates, aluminum plates and the like, the thickness of the antenna substrate is 0.2 mm-0.5 mm, the coaxial cable welding fixing points 2 are located on two sides of the edge of the substrate 1, and the bottom surface of the substrate is used as a ground plane.
Referring to fig. 2 and 3, the radiating elements 3 and 4 are made of the same material as the substrate 1, and the embodiment can be made in a single metal material plate by a wire cutting process or a laser cutting process into the patterns shown in fig. 2 and 3.
Referring to fig. 3, radiating element 3 and radiating element 4 share a feed, which may provide a higher isolation between radiation excited by the surface current distribution formed by radiating element 3 and radiating element 4 and radiation excited by the surface current distribution formed by radiating element 5, the feed being a coaxial cable, and the feed end being located at 6 as shown in fig. 1.
Referring to fig. 4, the radiating element 5 is fed using a coaxial cable, the feed end being located at 7 as shown in fig. 1.
The introduction of the radiating element 4 interferes with the mutual coupling of the radiating element 3 and the radiating element 5, thereby increasing the isolation of the two bands 2.4GHz and 5.3 GHz.
Fig. 5 shows a simulation graph of S-parameters when the feeding terminals of the radiation elements 3 and 4 are P1 ports and the feeding terminal of the radiation element 5 is P2 ports, and it can be seen from the graph that S12 (degree of coupling) between the radiation elements 3, 4 and 5 is smaller than-15 dB in each of the 2.4 GHz-2.5 GHz band, 4.2 GHz-4.75 GHz band and 5.15 GHz-5.825 GHz band.
Fig. 6 shows a simulation graph of the standing-wave ratio parameter when the feeding terminal 6 of the radiation elements 3 and 4 is a P1 port and the feeding terminal 7 of the radiation element 5 is a P2 port, and it can be seen from the graph that the standing-wave ratio coefficients of the radiation elements 3, 4, and 5 are all less than 2.0 in the 2.4 GHz-2.5 GHz band, the 4.2 GHz-4.75 GHz band, and the 5.15 GHz-5.825 GHz band.
Claims (5)
1. The utility model provides a compact high isolation dual-band ultra wide band antenna which characterized in that: the antenna comprises an antenna substrate (1) and three radiating elements which are positioned in the same horizontal plane with the substrate (1) and are arranged side by side, wherein the bottom surface of the substrate (1) is used as a ground plane; wherein,
the first radiating element (3) is formed by connecting an L-shaped metal strip and a semicircular metal block, and the semicircular metal block is the radiating tail end of the first radiating element (3);
the second radiating element (4) is formed by connecting an S-shaped metal strip with a rectangular metal block, and the rectangular metal block is the radiating tail end of the second radiating element (4);
the third radiating element (5) is formed by connecting an L-shaped metal strip and an oval metal block, wherein the oval metal block is the radiating tail end of the third radiating element (5);
the first radiating element (3) and the third radiating element (5) are symmetrically arranged on two sides of the second radiating element (4) respectively, and feed ends of the three radiating elements are connected with the substrate respectively.
2. The compact high isolation dual band ultra wide band antenna of claim 1, wherein: the working waveband of the first radiating element (3) is 2.4GHz, the working waveband of the third radiating element (5) is 5.3GHz, and the working waveband of the second radiating element (4) is 4.2 GHz.
3. The compact high isolation dual band ultra wide band antenna of claim 1, wherein: the antenna substrate (1) is made of metal materials, the thickness of the antenna substrate is 0.2 mm-0.5 mm, and two coaxial cable welding fixing points (2) are symmetrically arranged on two sides of the edge of the substrate (1).
4. The compact high isolation dual band ultra wide band antenna of claim 1, wherein: the first radiating element (3) and the second radiating element (4) adopt coaxial cable feeding and share a feeding end, and the feeding end is positioned at a connecting part (6) of the L-shaped metal strip of the first radiating element (3) and the S-shaped metal strip of the second radiating element (4).
5. The compact high isolation dual band ultra wide band antenna of claim 1, wherein: the third radiating element (5) adopts a coaxial cable for feeding, and the feeding end is positioned at the joint (7) of the L-shaped metal strip and the oval metal block which form the third radiating element (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201223840U CN202503102U (en) | 2012-03-28 | 2012-03-28 | Compact type high-isolation ultra-wideband dual-waveband antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201223840U CN202503102U (en) | 2012-03-28 | 2012-03-28 | Compact type high-isolation ultra-wideband dual-waveband antenna |
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| Publication Number | Publication Date |
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| CN202503102U true CN202503102U (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201223840U Expired - Fee Related CN202503102U (en) | 2012-03-28 | 2012-03-28 | Compact type high-isolation ultra-wideband dual-waveband antenna |
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| Country | Link |
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| CN (1) | CN202503102U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570010A (en) * | 2012-03-28 | 2012-07-11 | 南京信息工程大学 | Compact type high-isolation ultra-wideband dual-waveband antenna |
| CN104868248A (en) * | 2014-02-26 | 2015-08-26 | 启碁科技股份有限公司 | Broadband antenna |
-
2012
- 2012-03-28 CN CN2012201223840U patent/CN202503102U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570010A (en) * | 2012-03-28 | 2012-07-11 | 南京信息工程大学 | Compact type high-isolation ultra-wideband dual-waveband antenna |
| CN102570010B (en) * | 2012-03-28 | 2014-09-10 | 南京信息工程大学 | Compact type high-isolation ultra-wideband dual-waveband antenna |
| CN104868248A (en) * | 2014-02-26 | 2015-08-26 | 启碁科技股份有限公司 | Broadband antenna |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121024 Termination date: 20150328 |
|
| EXPY | Termination of patent right or utility model |