CN109888497B - Planar dipole dual-band antenna and antenna device - Google Patents
Planar dipole dual-band antenna and antenna device Download PDFInfo
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Abstract
The invention belongs to the technical field of dipole antennas, and provides a planar dipole dual-band antenna and an antenna device, wherein the planar dipole dual-band antenna comprises a first radiation section, a signal feed point, a public ground, a second radiation section, an impedance matching section, a first signal transmission section and a second signal transmission section; the impedance matching section is horizontally arranged, is configured to provide common impedance matching of the two frequency bands for the first radiation section and the second radiation section, and has a length corresponding to both a preset proportional value of the wavelength of the operating frequency of the second radiation section and a preset proportional value of the wavelength of the operating frequency of the first radiation section. Therefore, the dual-frequency impedance matching function is realized by adopting the impedance matching section, the frequency of the first radiation section is different from that of the second radiation section, the antenna can perform ground current coupling elimination in two frequency ranges, the stability of the radiation field type of the antenna is ensured, and the residual ground current interference risk of the signal connection cable during connection is eliminated.
Description
Technical Field
The invention belongs to the technical field of dipole antennas, and particularly relates to a planar dipole dual-band antenna and an antenna device.
Background
With the gradual establishment of a broadband network and the life of the general public, the demand of the public for WIFI products is more and more vigorous, and wireless WIFI communication equipment becomes an integral part of daily life. The popularization rate of various wireless WIFI communication equipment in society is very fast, and under the large policy background of pushing the technical upgrading of the communication industry based on the state, the 5G network technology is mature rapidly, and the wireless WIFI communication equipment can enter a commercial mode rapidly in a short time. The high speed and large bandwidth of the 5G network brings rich network information resources, so that various levels of users such as individuals, enterprises, government and the like can obtain the expected information through the same network, and the expected functions are realized. Among these, the most convenient and quick mode is the wireless access mode, which saves a great deal of network laying cost, can be quickly planned, quickly installed and put into use, and is relatively simple in maintenance.
How to design a miniaturized, low-profile and multi-band built-in antenna becomes the difficulty and bottleneck of mobile communication development, so in order to meet the characteristics of the product, the corresponding built-in antenna needs to be light, thin and small as well, the performance of the antenna cannot be obviously reduced, the antenna design form of the built-in antenna using dipoles at present has the unique advantages of simple structure, light weight, conformal performance, low manufacturing cost, high radiation efficiency, easy realization of controllability of radiation direction and the like.
Fig. 1 shows a typical dipole antenna structure, wherein the section a and the section B are dipole antenna radiating arms, the diameters, the lengths and the materials of the dipole antenna radiating arms are the same, the section C is an impedance matching section, the size of the impedance matching section and the working frequency band of the antenna show an even multiple relation, and the section D is an input port of a signal.
However, the dipole antenna has a fatal defect that the operating frequency width ratio is very narrow, can reach 7.5% basically, and is difficult to realize double frequency, which severely limits the wide use of the dipole antenna in mobile terminal products.
Therefore, the conventional dipole antenna technology has the problem that the working frequency width is relatively narrow, and double frequencies cannot be realized.
Disclosure of Invention
The invention aims to provide a planar dipole dual-band antenna and an antenna device, and aims to solve the problem that the prior dipole antenna technology has a relatively narrow working frequency width and cannot realize dual frequencies.
The first aspect of the invention provides a planar dipole dual-band antenna, which comprises a first radiation section, a signal feed point, a common ground, a second radiation section, an impedance matching section, a first signal transmission section and a second signal transmission section;
the second radiation sections are connected with the tail ends of the two sides of the public land in a one-to-one correspondence manner through the first signal transmission sections and the second signal transmission sections respectively;
the impedance matching section is horizontally arranged, the lower edge of the first radiation section and the common ground are adopted to form a common ground together, and the starting point is the signal feed-in point; the impedance matching section is configured to provide common impedance matching of the two frequency bands for the first radiation section and the second radiation section, and the length of the impedance matching section corresponds to both a preset ratio value of the wavelength of the operating frequency of the second radiation section and a preset ratio value of the wavelength of the operating frequency of the first radiation section.
The invention provides an antenna device, which comprises a PCB and the planar dipole dual-band antenna, wherein the PCB and the planar dipole dual-band antenna are integrated by adopting a printing mode.
The invention provides a planar dipole dual-band antenna and an antenna device, wherein the planar dipole dual-band antenna comprises a first radiation section, a signal feed point, a public ground, a second radiation section, an impedance matching section, a first signal transmission section and a second signal transmission section; the impedance matching section is horizontally arranged, is configured to provide common impedance matching of the two frequency bands for the first radiation section and the second radiation section, and has a length corresponding to both a preset proportional value of the wavelength of the operating frequency of the second radiation section and a preset proportional value of the wavelength of the operating frequency of the first radiation section. Therefore, the dual-frequency impedance matching function is realized by adopting the impedance matching section, the frequency of the first radiation section is different from that of the second radiation section, the antenna can perform ground current coupling elimination in two frequency ranges, the stability of the radiation field type of the antenna is ensured, the residual ground current interference risk of the signal connection cable in connection is eliminated, and the problem that the dual-frequency cannot be realized due to narrower working frequency width in the existing dipole antenna technology is solved.
Drawings
Fig. 1 is a schematic structural diagram of a dipole antenna according to the prior art.
Fig. 2 is a schematic structural diagram of a planar dipole dual-band antenna according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The planar dipole dual-band antenna and the antenna device comprise a first radiation section, a signal feed point, a common ground, a second radiation section, an impedance matching section, a first signal transmission section and a second signal transmission section; the impedance matching section is horizontally arranged, is configured to provide common impedance matching of the two frequency bands for the first radiation section and the second radiation section, and has a length corresponding to both a preset proportional value of the wavelength of the operating frequency of the second radiation section and a preset proportional value of the wavelength of the operating frequency of the first radiation section. Therefore, the dual-frequency impedance matching function is realized by adopting the impedance matching section, the frequency of the first radiation section is different from that of the second radiation section, the antenna can perform ground current coupling elimination in two frequency ranges, the stability of the radiation field type of the antenna is ensured, and the residual ground current interference risk of the signal connection cable during connection is eliminated.
Fig. 2 shows a structure of a planar dipole dual-band antenna according to an embodiment of the present invention, and for convenience of explanation, only the portions related to the embodiment are shown, which are described in detail below:
the planar dipole dual-band antenna comprises a first radiating section (shown as 20 and 30 in fig. 2), a signal feed point 90, a common ground 80, a second radiating section (shown as 60 and 70 in fig. 2), an impedance matching section 10, a first signal transmitting section 40, and a second signal transmitting section 50.
The second radiating segments (indicated at 60 and 70 in fig. 2) are connected to both edge ends of the common ground 80 in one-to-one correspondence through the first signal transmitting segment 40 and the second signal transmitting segment 50, respectively.
The impedance matching section 10 is horizontally arranged, and is formed by the lower edge of a first radiation section (shown as 20 and 30 in fig. 2) and the common ground 80, and the starting point is a signal feed point 90; the impedance matching section 10 is configured such that the first radiation section and the second radiation section provide a common impedance matching of the two frequency bands, and the length of the impedance matching section 10 corresponds to both a preset proportional value of the wavelength of the operating frequency of the second radiation section and a preset proportional value of the wavelength of the operating frequency of the first radiation section.
As an embodiment of the present invention, the preset ratio is 1/4, that is, the length of the impedance matching section 10 corresponds to 1/4 wavelength of the working frequency of the second radiation section first, then the size of the protruding block of the signal feed point 90 is corrected, and corresponds to 1/4 wavelength of the working frequency of the first radiation section again, so as to achieve the dual-frequency resonant working mode.
In addition, the planar dipole dual-band antenna adopts the deformed dipole antenna structure with the impedance matching section 10, the impedance matching section 10 and the radiating section (the first radiating section and the second radiating section) are skillfully combined, the height of the antenna is greatly reduced, the miniaturization of the antenna is realized, and meanwhile, the common ground 80 is used for dividing, so that the dual-frequency working mode is realized, and the application field of the antenna is wider.
Preferably, the operating frequency of the first radiating section is a high frequency section, and the frequency width ratio is 13% which is much larger than that of a conventional dipole antenna. The first radiating section includes a first radiating element 20 and a second radiating element 30; the first radiating element 20 and the second radiating element 30 are in the shape of two triangles which are oppositely arranged, the tail end of the first radiating element 20 is connected with the common ground 80, a gap is formed in the middle to realize impedance matching, the bottom surface of the second radiating element 30 is fused with the common ground 80, and a small raised platform is formed at the staggered position of the bottoms of the first radiating element 20 and the second radiating element 30 to form a signal feed point 90.
Preferably, the working frequency of the second radiation section is a low frequency band, the frequency width ratio is 4%, which belongs to the requirement of the conventional dipole antenna, and the second radiation section comprises a third radiation unit 60 and a fourth radiation unit 70; the third radiating element 60 and the fourth radiating element 70 have symmetrical broken line shapes, and the top ends of the third radiating element 60 and the fourth radiating element 70 respectively form signal input paths by adopting one-to-one correspondence between the first signal transmission section 40 and the second signal transmission section 50 and the common ground 80 and the impedance matching section 10. The equivalent lengths of the third radiating element 60 and the fourth radiating element 70 strictly correspond to 1/4 wavelength of the second operating frequency of the antenna, so that the antenna can be ensured to be efficient in radiation in the second frequency band. Meanwhile, the third radiating element 60 and the fourth radiating element 70 adopt a meander line manner.
As an embodiment of the present invention, the signal feed point 90 is configured to compress the length of the lower edge of the slot of the impedance matching section 10 forward, and the length of the slot corresponds to the frequency of the second radiation section, and the upper edge of the slot corresponds to the frequency of the first radiation section, so that a slot section can be used to resonate to two frequencies, thereby implementing a common impedance matching function of the two frequencies.
The invention also provides an antenna device which comprises a PCB and the planar dipole dual-band antenna, wherein the PCB and the planar dipole dual-band antenna are integrated into a whole in a printing mode.
Specifically, the planar dipole dual-band antenna is formed by stamping a hardware die, and the planar dipole dual-band antenna is installed in a plug-in manner and is integrated with a PCB (printed circuit board) of a complete machine circuit using the antenna.
Therefore, the planar dipole dual-frequency antenna and the antenna device have the advantages that the dual-frequency impedance matching function is realized by adopting the impedance matching section, the antenna is miniaturized by skillfully combining the shape of the impedance matching section with the shape of the radiation section, the function of eliminating the ground current coupling of the antenna in two frequency ranges is realized in a limited space, the stability of the radiation field type of the antenna is ensured, and the residual ground current interference risk of the signal connection cable during connection is eliminated.
The two radiating sections are distributed up and down, so that the mutual independence of the working frequencies of the two antennas is ensured, the width ratio of the working frequency of the first radiating section is far greater than the technical index of a conventional dipole antenna, and the antenna belongs to ultra-wideband characteristics, so that triangular radiating vibrators are adopted to improve the impedance matching characteristics in a wide frequency range and realize the stability of the radiation efficiency in the ultra-wideband frequency range; the antenna form of the second radiation section adopts a folded line shape, so that the antenna size is ensured not to be overlarge. The antenna device can be designed into a hardware form and a PCB printing form, and the use mode is very flexible, so that the antenna and the PCB of the main board can be combined into a whole, and the aim of low profile size is fulfilled. The convenience of the user is improved, and the common design of the dual-frequency antenna is realized.
The following describes the working principle of the planar dipole dual-frequency antenna and the antenna device with reference to fig. 2 as follows:
the transmission signal passes through the signal feed point 90 and forms balun effect in the lateral impedance matching section 10, so that the image current of the antenna is eliminated, the uncertain deflection of the radiation direction caused by different cable lengths can be prevented, the signal directly enters the first radiation section, the hypotenuse lengths of the first radiation unit 20 and the second radiation unit 30 are about equal to 1/4 wavelength of the central frequency point of the working frequency, and the radiation starting condition can be formed by effective resonance, so that the radiation of the high-frequency signal is formed; and in order to expand the range of the resonance frequency, the first and second radiating elements 20 and 30 are designed as triangles, and a resonance frequency width of about 13% can be achieved. The lower edge of the impedance matching section 10 and the lower edge of the first radiating section together form a common ground 80, which is structurally isolated from the second radiating section.
The first signal transmission section 40 and the second signal transmission section 50 are respectively led out from two sides of the tail end of the public land 80, and adopt a fold line form, so that the size of the antenna is greatly reduced; meanwhile, in order to eliminate the mirror current of the second radiation section working frequency section, thereby causing the radiation direction offset caused by the cable length change, the starting point of the impedance matching section 10 adopts the matching current path shortening caused by the bump of the signal feed-in point 90, so as to achieve the matching effect on the high-frequency working frequency.
A planar dipole dual-band antenna adopts a lateral common impedance matching section to realize high-efficiency image current suppression in dual-band, realizes balun effect on the dual-band antenna, adopts a triangular radiator shape to realize a frequency width exceeding 13% because the high-band antenna works in a wide frequency range, adopts a folded line radiator shape to realize miniaturization of the antenna because the low-band antenna works in a narrow frequency range, realizes balun function in the dual-band in a limited space, and improves radiation efficiency of the antenna. The balun structure of the dual-band effectively eliminates the image current movement in two frequency ranges, avoids the occurrence of radiation direction deviation caused by different coupling flows of ground currents on the cable shielding layer when the lengths of the signal cables are different, and the whole antenna structure can be manufactured by adopting sheet metal materials, can also be printed on a circuit board, or can be manufactured by adopting a flexible circuit board printing mode.
In summary, the planar dipole dual-band antenna and the antenna device provided by the embodiments of the present invention include a first radiation section, a signal feed point, a common ground, a second radiation section, an impedance matching section, a first signal transmission section, and a second signal transmission section; the impedance matching section is horizontally arranged, is configured to provide common impedance matching of the two frequency bands for the first radiation section and the second radiation section, and has a length corresponding to both a preset proportional value of the wavelength of the operating frequency of the second radiation section and a preset proportional value of the wavelength of the operating frequency of the first radiation section. Therefore, the dual-frequency impedance matching function is realized by adopting the impedance matching section, the frequency of the first radiation section is different from that of the second radiation section, the antenna can perform ground current coupling elimination in two frequency ranges, the stability of the radiation field type of the antenna is ensured, the residual ground current interference risk of the signal connection cable in connection is eliminated, and the problem that the dual-frequency cannot be realized due to narrower working frequency width in the existing dipole antenna technology is solved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The planar dipole dual-band antenna is characterized by comprising a first radiation section, a signal feed point, a public ground, a second radiation section, an impedance matching section, a first signal transmission section and a second signal transmission section;
the second radiation sections are connected with the tail ends of the two sides of the public land in a one-to-one correspondence manner through the first signal transmission sections and the second signal transmission sections respectively;
the impedance matching section is horizontally arranged, the lower edge of the first radiation section and the common ground are adopted to form a common ground together, and the starting point is the signal feed-in point; the impedance matching section is configured to provide common impedance matching of the two frequency bands for the first radiation section and the second radiation section, and the length of the impedance matching section corresponds to a preset ratio value of the wavelength of the working frequency of the second radiation section and a preset ratio value of the wavelength of the working frequency of the first radiation section;
the first radiation section comprises a first radiation unit and a second radiation unit;
the first radiating unit and the second radiating unit are in the shape of two triangles which are oppositely arranged, the tail ends of the first radiating unit are connected with the public ground, a gap is formed in the middle of the first radiating unit to realize impedance matching, the bottom surface of the second radiating unit is fused with the public ground, and the staggered positions of the bottoms of the first radiating unit and the second radiating unit form a raised small platform to form the signal feed-in point;
the second radiation section comprises a third radiation unit and a fourth radiation unit;
the third radiating unit and the fourth radiating unit are symmetrically folded, and the top ends of the third radiating unit and the fourth radiating unit respectively adopt the first signal transmission section and the second signal transmission section to form a signal input path in one-to-one correspondence with the public ground and the impedance matching section.
2. The planar dipole dual-band antenna as recited in claim 1, wherein said predetermined ratio value is 1/4.
3. The planar dipole dual-band antenna of claim 1, wherein said first radiating segment has a frequency width ratio of 13% of an operating frequency.
4. The planar dipole dual-band antenna as recited in claim 1, wherein said second radiating segment has a frequency width ratio of 4% of an operating frequency.
5. The planar dipole dual-band antenna as recited in claim 1, wherein said signal feed point is configured to compress a length of a lower edge of a slot of said impedance matching section forward, and wherein said length of said slot corresponds to a frequency of said second radiating section and wherein an upper edge of said slot corresponds to a frequency of said first radiating section.
6. An antenna device, characterized by comprising a PCB board and further comprising the planar dipole dual-band antenna according to any one of claims 1-5, wherein the PCB board and the planar dipole dual-band antenna are integrated by adopting a printing mode.
7. The antenna assembly of claim 6 wherein the planar dipole dual band antenna is stamped and formed from a metal mold.
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| CN201910202236.6A CN109888497B (en) | 2019-03-18 | 2019-03-18 | Planar dipole dual-band antenna and antenna device |
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| CN201910202236.6A CN109888497B (en) | 2019-03-18 | 2019-03-18 | Planar dipole dual-band antenna and antenna device |
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| CN109888497B true CN109888497B (en) | 2024-03-22 |
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| CN112787094B (en) * | 2021-01-18 | 2025-06-20 | 深圳市共进电子股份有限公司 | Small size dual-band antenna and communication equipment |
| CN118783094A (en) * | 2023-04-03 | 2024-10-15 | 华为技术有限公司 | Antenna device, antenna assembly and vehicle |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100013586A (en) * | 2008-07-31 | 2010-02-10 | 한국항공대학교산학협력단 | Directional antenna using multiband and broadband |
| CN104966897A (en) * | 2015-07-07 | 2015-10-07 | 深圳市共进电子股份有限公司 | T-shaped dipole antenna |
| CN105048085A (en) * | 2015-08-05 | 2015-11-11 | 深圳市共进电子股份有限公司 | Dipole antenna |
| CN205319316U (en) * | 2015-12-30 | 2016-06-15 | 福建省汇创新高电子科技有限公司 | Be applied to wireless LAN's dual -frenquency MIMO dipole antenna |
| CN105680169A (en) * | 2016-01-29 | 2016-06-15 | 深圳市共进电子股份有限公司 | Double-frequency dipole antenna |
| CN206432391U (en) * | 2017-01-05 | 2017-08-22 | 深圳市共进电子股份有限公司 | Dipole antenna and its communication equipment |
| WO2018103281A1 (en) * | 2016-12-09 | 2018-06-14 | 上海斐讯数据通信技术有限公司 | High-gain antenna |
| CN108777355A (en) * | 2018-04-17 | 2018-11-09 | 哈尔滨工程大学 | A kind of low section broad-band antenna |
| CN209691957U (en) * | 2019-03-18 | 2019-11-26 | 深圳市共进电子股份有限公司 | A kind of plane dipole dual-band antenna and antenna assembly |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6839038B2 (en) * | 2002-06-17 | 2005-01-04 | Lockheed Martin Corporation | Dual-band directional/omnidirectional antenna |
| US7733286B2 (en) * | 2008-05-26 | 2010-06-08 | Southern Taiwan University | Wideband printed dipole antenna for wireless applications |
-
2019
- 2019-03-18 CN CN201910202236.6A patent/CN109888497B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100013586A (en) * | 2008-07-31 | 2010-02-10 | 한국항공대학교산학협력단 | Directional antenna using multiband and broadband |
| CN104966897A (en) * | 2015-07-07 | 2015-10-07 | 深圳市共进电子股份有限公司 | T-shaped dipole antenna |
| CN105048085A (en) * | 2015-08-05 | 2015-11-11 | 深圳市共进电子股份有限公司 | Dipole antenna |
| CN205319316U (en) * | 2015-12-30 | 2016-06-15 | 福建省汇创新高电子科技有限公司 | Be applied to wireless LAN's dual -frenquency MIMO dipole antenna |
| CN105680169A (en) * | 2016-01-29 | 2016-06-15 | 深圳市共进电子股份有限公司 | Double-frequency dipole antenna |
| WO2018103281A1 (en) * | 2016-12-09 | 2018-06-14 | 上海斐讯数据通信技术有限公司 | High-gain antenna |
| CN206432391U (en) * | 2017-01-05 | 2017-08-22 | 深圳市共进电子股份有限公司 | Dipole antenna and its communication equipment |
| CN108777355A (en) * | 2018-04-17 | 2018-11-09 | 哈尔滨工程大学 | A kind of low section broad-band antenna |
| CN209691957U (en) * | 2019-03-18 | 2019-11-26 | 深圳市共进电子股份有限公司 | A kind of plane dipole dual-band antenna and antenna assembly |
Non-Patent Citations (3)
| Title |
|---|
| Baohua Sun ; Jin Zhang.A Wideband Dipole Antenna Using a Impedance-matched Network.《2018 Cross Strait Quad-Regional Radio Science and Wireless Technology Conference 》.1-2. * |
| 介质集成双频磁电偶极子天线设计;帅陈杨、王光明;《2017年全国天线年会论文集(上册)》;110-112 * |
| 新型宽带电磁偶极子微带天线的研究;安文星;《中国优秀博士学位论文全文数据库(电子期刊)》;全文 * |
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