CN108134194B - A miniaturized WLAN dual-band PIFA antenna - Google Patents
A miniaturized WLAN dual-band PIFA antenna Download PDFInfo
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- CN108134194B CN108134194B CN201711379944.4A CN201711379944A CN108134194B CN 108134194 B CN108134194 B CN 108134194B CN 201711379944 A CN201711379944 A CN 201711379944A CN 108134194 B CN108134194 B CN 108134194B
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- 230000005855 radiation Effects 0.000 claims abstract description 27
- 230000008054 signal transmission Effects 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—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
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
本发明涉及一种小型化WLAN双频PIFA天线，所述天线辐射单元由接地线、馈线、第一分支走线、第二分支走线组成，接地线、馈线、第一分支走线、第二分支走线附着在天线支架的表面，组成一个天线组件；所述天线辐射单元的接地线采用较窄走线实现，述天线辐射单元的第一分支走线从馈线延伸而出，所述天线辐射单元的第二分支走线采用前窄后宽的U型走线，所述天线辐射单元的天线走线形式采用U型走线，所述馈线连接馈源和天线辐射单元，所述接地线连接印制电路板和天线辐射单元，本发明利用小型化技术实现WLAN双频段移动终端天线，能够有效的利用空间，在产品整体小型化的基础上完成2.4GHz WLAN、5GHz WLAN频率覆盖，从而实现WLAN双频的高效天线辐射。
The present invention relates to a miniaturized WLAN dual-band PIFA antenna, wherein the antenna radiating unit is composed of a grounding wire, a feeder, a first branch routing wire, and a second branch routing wire, wherein the grounding wire, the feeder, the first branch routing wire, and the second branch routing wire are attached to the surface of an antenna bracket to form an antenna component; the grounding wire of the antenna radiating unit is implemented by a relatively narrow routing wire, the first branch routing wire of the antenna radiating unit extends from the feeder wire, the second branch routing wire of the antenna radiating unit adopts a U-shaped routing wire which is narrow in front and wide in the back, the antenna routing form of the antenna radiating unit adopts a U-shaped routing wire, the feeder wire connects a feed source and the antenna radiating unit, the grounding wire connects a printed circuit board and the antenna radiating unit, and the present invention utilizes miniaturization technology to realize a WLAN dual-band mobile terminal antenna, can effectively utilize space, complete 2.4GHz WLAN and 5GHz WLAN frequency coverage on the basis of overall miniaturization of the product, thereby realizing efficient antenna radiation of the WLAN dual-band.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a miniaturized WLAN dual-frequency antenna without a headroom environment, which adopts spatial multiplexing to realize dual-frequency antenna radiation and reduces the occupied space of the antenna without the headroom.
Background
Modern wireless communication devices require that the WLAN antenna design be implemented in as little space as possible to achieve more functionality. In order to meet the dual-band requirements of WLAN (wireless local area network) IEEE 802.11 series 2.4GHz (2.4 GHz-2.5 GHz), 5 GHz WLAN (4.9 GHz-5.85 GHz), the conventional WLAN antenna design technology mainly places the antenna position in the clearance area at the edge of the motherboard and ensures sufficient antenna routing area. The traditional design scheme is to meet the requirement of dual-band coverage, needs to ensure that products remain a certain clearance area and wiring area, and is not applicable to the design of miniaturized mobile terminal antennas. Accordingly, the size of the related parts is also greatly limited after the space of the wireless communication device is reduced. In environments where wireless device space is reduced and antenna usage space is reduced, antenna performance efficiency may be poor. The invention designs a miniaturized WLAN antenna, which can realize three-frequency-band frequency coverage in a small antenna space, wherein an antenna main body is positioned in a main board space, a clearance area is not required to be reserved specially at the edge of the main board, and meanwhile, high efficiency performance can be realized. The WLAN dual-band antenna designed by the invention can realize good performance efficiency of WIFI dual-band in a non-clearance and small-space environment, and is suitable for the design of a miniaturized WLAN antenna. The WLAN dual-band antenna designed by the invention can be popularized and applied to different mobile terminal WLAN antenna designs, and has strong practicability.
Disclosure of Invention
The invention aims to overcome the difficulty of the prior art and provide a PIFA antenna for realizing the double-frequency good efficiency performance of a WLAN in a headroom-free and small-space environment.
The miniature WLAN dual-frequency PIFA antenna is characterized in that a printed circuit board and an antenna part form an entire antenna system, the upper end of the printed circuit board 1 is provided with an antenna radiating unit 3, the antenna radiating unit 3 consists of a grounding wire 5, a feeder line 6, a first branch wire 7 and a second branch wire 8, and the grounding wire 5, the feeder line 6, the first branch wire 7 and the second branch wire 8 are attached to the surface of an antenna bracket 4 to form an antenna assembly; the grounding wire 5 of the antenna radiation unit 3 is realized by adopting a narrower wire, the first branch wire 7 of the antenna radiation unit 3 extends from a feeder line, the second branch wire 8 of the antenna radiation unit 3 adopts a U-shaped wire with a narrow front and a wide rear, the antenna wire form of the antenna radiation unit adopts the U-shaped wire, the feeder line 6 is connected with the feed source 2 and the antenna radiation unit 3, the grounding wire 5 is connected with the printed circuit board 1 and the antenna radiation unit 3, and the printed circuit board 1 has no clearance and uses full metal coverage.
The antenna radiating element generates two resonant modes through the ground line 5, the feed line 6 and the first and second branch lines 7, 8: a low frequency 2.4GHz-2.5GHz resonant mode and a high frequency 4.9GHz-5.85GHZ resonant mode;
Wherein the ground line 5, the feed line 6 and the second branch line 8 generate low-frequency 2.4GHz-2.5GHz antenna radiation resonance. The second branch wiring 8 is a U-shaped wiring, and space multiplexing is realized by adopting a laminated wiring, so that the occupied space of the antenna is reduced. The wider wiring position at the tail end of the second branch wiring 8 is positioned at the top end of the antenna bracket 4, and the wider wiring patch is beneficial to antenna radiation; the part of the second branch wire 8 close to the feeder line is realized by adopting a narrower wire, on one hand, the narrower antenna wire reduces the coupling with the wide wire part at the tail end, reduces the negative influence on the antenna radiation, on the other hand, the narrow wire has stronger inductance, and further reduces the occupied volume of the antenna.
The grounding wire 5, the feeder line 6, the first branch wire 7 and the second branch wire 8 jointly generate low-frequency 4.9GHz-5.85GHz antenna radiation resonance. The ground line 5, the feed line 6, and the second branch line 8 may generate a frequency-doubled resonance in a higher frequency band. The first branch wiring 7 adjusts the frequency multiplication resonance generated by the grounding wire 5, the feeder 6 and the second branch wiring 8 to the required 4.9GHz-5.85GHz frequency band. The first branch line 7 extends from the feeder line 6 to the high position along the antenna bracket 4, and occupies only the longitudinal height space, and does not need the transverse antenna space. The first branch line 7 is close to the top end of the antenna bracket 4 and is far away from the printed circuit board 1, so that effective antenna radiation in the frequency range of 4.9GHz-5.85GHz can be realized.
Wherein, the grounding wire 5 and the feeder line 6 realize impedance matching effect on the antenna, and improve the radiation capability of the antenna. The grounding wire 5 adopts narrower wiring, so that wiring inductance is increased; the distance between the grounding wire 5 and the feeder 6 is small, and the small distance is adopted to improve the feed end capacity of the antenna. The ground wire 5 and the feeder 6 act together, the inductance and the capacitance of the ground wire can adjust the input impedance of the antenna feeder end, and the optimal dual-band antenna port matching effect is achieved, so that the radiation capacity of the antenna is improved.
The grounding wire 5 connects the printed circuit board 1 and the antenna radiating unit 3, and adopts a section of microstrip line, but is not limited to the microstrip line, and can also be a connection wire for signal transmission, such as a spring pin, a Pogo pin, and the like.
The feeder line 6 connects the feed source 2 and the antenna radiating unit 3, and adopts a section of microstrip line, but is not limited to the microstrip line, and may be a connection line for signal transmission, such as a spring pin, a Pogo pin, and the like.
The beneficial effects of the antenna of the invention are: the invention can effectively utilize space and realize 2.4GHz WLAN and 5GHz WLAN frequency coverage on the basis of overall miniaturization of products. Can meet the coverage requirement of IEEE802.11b/g/n/a frequency band. And under the environment without antenna clearance, the efficient antenna radiation of WLAN double frequencies is realized by using a smaller antenna wiring space.
Drawings
Fig. 1 is a schematic diagram of an antenna structure according to the present invention
FIG. 2 is an enlarged view of a portion of FIG. 1
Fig. 3 shows return loss of the WLAN antenna of the present invention
Fig. 4 shows the efficiency of the WLAN antenna of the present invention
Description of the drawings
1: Printed circuit board, 2: feed source, 3: antenna radiating element, 4: antenna boom, 5: ground wire, 6: feeder line, 7: first branch wiring, 8: and a second branch trace.
Detailed Description
For a clearer and more effective description of the technical solution of the embodiments of the present invention, the drawings that are needed to be used in the embodiments will be briefly described
As shown in fig. 1 and 2, the structure of the PIFA antenna includes: the antenna comprises a printed circuit board 1, a feed source 2, an antenna radiation unit 3, an antenna bracket 4, a ground wire 5, a feed line 6, a first branch wire 7 and a second branch wire 8; the printed circuit board 1 adopts a PCB board in the embodiment, the size is 80mm, and the antenna radiating unit is positioned at the upper end of the PCB board; the antenna radiating element comprises a ground wire 5, a feed wire 6, a first branch wire 7 and a second branch wire 8. The grounding wire 5, the feeder wire 6, the first branch wire 7 and the second branch wire 8 are attached to the surface of the plastic bracket, and the printed circuit board 1, the feed source 2, the antenna radiating unit 3 and the antenna bracket 4 form the whole antenna system together.
Feeder 6: a section of microstrip line connecting the feed source and the radiating unit, but not limited to the microstrip line, and can be a connecting line with spring pins, pogo pins and the like as signal transmission;
The grounding wire 5: the microstrip line connecting the printed circuit board and the radiating element is not limited to the microstrip line, but may be a connection line of a spring pin, a Pogo pin, or the like as signal transmission. The line width of the grounding wire 5 and the distance between the grounding wire 5 and the feeder line 6 can adjust the port impedance of the antenna, so that the antenna can better radiate in dual frequency bands.
First branch wiring 7: the first branch line 7 extends from the feeder line 6 to a high position along the antenna support 4, and is positioned near the top end of the antenna support 4. The grounding wire 5, the feeder line 6, the first branch wiring 7 and the second branch wiring 8 jointly generate low-frequency 4.9GHz-5.85GHz antenna radiation resonance. The ground line 5, the feed line 6, and the second branch line 8 may generate a frequency-doubled resonance in a higher frequency band. The first branch wiring 7 adjusts the frequency multiplication resonance generated by the grounding wire 5, the feeder 6 and the second branch wiring 8 to the required 4.9GHz-5.85GHz frequency band. The first branch wiring 7 is far away from the printed circuit board 1, and is beneficial to realizing effective antenna radiation in the frequency range of 4.9GHz-5.85 GHz. The first branch wiring 7 occupies only the longitudinal height space, does not need the transverse antenna space, and can reduce the space occupied by the antenna.
Second branch wiring 8: the second branch wire 8 is a U-shaped wire, and space multiplexing is realized by adopting a laminated wire, so that the occupied space of the antenna is reduced. The wider wiring position at the tail end of the second branch wiring 8 is positioned at the top end of the antenna bracket 4, and the wider wiring patch is beneficial to antenna radiation; the part of the second branch wire 8 close to the feeder line is realized by adopting a narrower wire, on one hand, the narrower antenna wire reduces the coupling with the wide wire part at the tail end, reduces the negative influence on the antenna radiation, on the other hand, the narrow wire has stronger inductance, and further reduces the occupied volume of the antenna.
Fig. 3 is a return loss of the WLAN antenna of the present invention. According to the invention, the WLAN antenna of the invention can cover the bandwidth of 4.9GHz-5.85GHz under the premise of meeting the performance of low frequency bandwidth of 2.4GHz-2.5 GHz.
Fig. 4 shows the efficiency of the WLAN antenna of the present invention. According to the invention, as shown in fig. 4, the WLAN antenna can meet the requirement that the ultra wide band width of the WLAN is high in performance efficiency, and the antenna can realize efficient antenna radiation in the short of the dual frequency.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711379944.4A CN108134194B (en) | 2017-12-20 | 2017-12-20 | A miniaturized WLAN dual-band PIFA antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711379944.4A CN108134194B (en) | 2017-12-20 | 2017-12-20 | A miniaturized WLAN dual-band PIFA antenna |
Publications (2)
| Publication Number | Publication Date |
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| CN108134194A CN108134194A (en) | 2018-06-08 |
| CN108134194B true CN108134194B (en) | 2024-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711379944.4A Active CN108134194B (en) | 2017-12-20 | 2017-12-20 | A miniaturized WLAN dual-band PIFA antenna |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111987441A (en) * | 2020-08-05 | 2020-11-24 | 惠州Tcl移动通信有限公司 | Antenna device and mobile terminal |
| CN114976592B (en) * | 2021-02-20 | 2024-06-04 | 北京小米移动软件有限公司 | Antenna structure and terminal equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013568A (en) * | 2010-12-01 | 2011-04-13 | 惠州Tcl移动通信有限公司 | Four-frequency-band built-in antenna and mobile communication terminal thereof |
| CN106505323A (en) * | 2016-12-08 | 2017-03-15 | 上海煜鹏通讯电子股份有限公司 | Low frequency broadband mobile terminal antenna is realized using double resonance |
| CN208078164U (en) * | 2017-12-20 | 2018-11-09 | 上海煜鹏通讯电子股份有限公司 | A kind of miniaturization WLAN dual-band PIFA antennas |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101505000A (en) * | 2008-02-05 | 2009-08-12 | 三星电子株式会社 | Multi-frequency band antenna and wireless communication terminal using the same |
| CN102013569B (en) * | 2010-12-01 | 2013-10-02 | 惠州Tcl移动通信有限公司 | Built-in aerial with five frequency ranges and mobile communication terminal thereof |
| CN202042593U (en) * | 2011-04-18 | 2011-11-16 | 广东欧珀移动通信有限公司 | A multi-band built-in antenna device |
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- 2017-12-20 CN CN201711379944.4A patent/CN108134194B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013568A (en) * | 2010-12-01 | 2011-04-13 | 惠州Tcl移动通信有限公司 | Four-frequency-band built-in antenna and mobile communication terminal thereof |
| CN106505323A (en) * | 2016-12-08 | 2017-03-15 | 上海煜鹏通讯电子股份有限公司 | Low frequency broadband mobile terminal antenna is realized using double resonance |
| CN208078164U (en) * | 2017-12-20 | 2018-11-09 | 上海煜鹏通讯电子股份有限公司 | A kind of miniaturization WLAN dual-band PIFA antennas |
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