CN101083352A - Plane inverse F-type antenna - Google Patents

Plane inverse F-type antenna Download PDF

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Publication number
CN101083352A
CN101083352A CN 200610060934 CN200610060934A CN101083352A CN 101083352 A CN101083352 A CN 101083352A CN 200610060934 CN200610060934 CN 200610060934 CN 200610060934 A CN200610060934 A CN 200610060934A CN 101083352 A CN101083352 A CN 101083352A
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CN
China
Prior art keywords
antenna
planar inverted
metal layer
shape antenna
inverted
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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.)
Pending
Application number
CN 200610060934
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Chinese (zh)
Inventor
梅家豪
邓嘉麟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
Original Assignee
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hongfujin Precision Industry Shenzhen Co Ltd, Hon Hai Precision Industry Co Ltd filed Critical Hongfujin Precision Industry Shenzhen Co Ltd
Priority to CN 200610060934 priority Critical patent/CN101083352A/en
Publication of CN101083352A publication Critical patent/CN101083352A/en
Pending legal-status Critical Current

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Abstract

The invention is a planar inverted F-shaped antenna, arranged on a substrate and comprising: earthed metal layer, radiator part, open circuit/short-circuit converter part, connection part and feed-in part, where the earthed metal layer is arranged on the substrate; the radiator part is used to receive radio frequency signals and comprises first bending part and open-circuit end, the first bending part is connected with the open-circuit end; the open circuit/short-circuit converter part is connected between the radiator part and the earthed metal layer and comprises second bending part; the connection part is connected with the open circuit/short-circuit converter part and the radiator part; the feed-in part is connected with the connection part to feed in signals; the first and second bending parts can effectively the area occupied by the antenna.

Description

Planar inverted F-shape antenna
Technical field
The present invention relates to a kind of antenna, relate in particular to a kind of planar inverted F-shape antenna.
Background technology
(Access Point AP) etc., based on the electromagnetic wave wireless signal transmission, thereby need not to adopt the connection cable can realize telecommunication for Wireless Telecom Equipment such as mobile phone, wireless network card, access point.
In Wireless Telecom Equipment, the antenna that is used to transmit and receive radiofrequency signal is one of key components, and characteristics such as its radiation efficiency, directivity, frequency range and impedance matching are bigger to the usefulness influence of Wireless Telecom Equipment.Antenna can be divided into external antenna and built-in antenna two classes at present.Because built-in antenna makes that the Wireless Telecom Equipment profile is succinct, avoided being subjected to the foreign object collision to produce possibility crooked, that fracture, thereby built-in antenna becomes the trend of wireless communication device applications owing to antenna is external.At present in built-in antenna, and LTCC (Low Temperatured Cofired Ceramic, LTCC) the processing procedure antenna has good high frequency and temperature characterisitic, but its shortcoming is to cost an arm and a leg, thus can't effectively reduce cost.The planar antenna that is printed on the circuit board has small and exquisite advantage frivolous and with low cost, thereby its application is extensive day by day.
The design of planar antenna has a lot, comparatively common for example planar inverted F-shape antenna (PlanarInverted-F Antenna).Generally speaking, planar inverted F-shape antenna is the printed circuit that forms approximate F type on circuit board, in order to receive and to send radiofrequency signal.See also Fig. 1, be the schematic diagram of existing planar inverted F-shape antenna.Planar inverted F-shape antenna is arranged on the substrate 10, and it comprises ground metal layer 20, Department of Radiation 30, open circuit 40 and feeding portion 50.Ground metal layer 20 is arranged on the substrate 10, and it comprises feed-in structure 60.Department of Radiation 30 comprises the open end 31 and first link 33.Open end 31 is unsettled.
Open circuit 40 is connected between Department of Radiation 30 and the ground metal layer 20, and it comprises second link 41 and the 3rd link 44.The 3rd link 44 is connected in ground metal layer 20.Second link 41 is connected with first link 33 becomes junction 70.Feeding portion 50 is connected in junction 70, is used for FD feed.The feed-in structure 60 that feeding portion 50 passes ground metal layer 20 is connected to match circuit.
Wireless Telecom Equipment more and more develops towards miniaturization now, according to the Antenna Design principle, the current feed circuit electrical path length of planar inverted F-shape antenna is a principle with 1/2 of radiofrequency signal operation wavelength, that is the air line distance between the open end 31 of existing planar inverted F-shape antenna and first link 33 can not be less than 1/2 of radiofrequency signal operation wavelength, thereby the occupied area of antenna can't effectively dwindle.But Wireless Telecom Equipment is more and more towards miniaturization development now, is a major challenge of Antenna Design now so how further to dwindle area.
Summary of the invention
In view of this, need provide a kind of planar inverted F-shape antenna, it can make the occupied area of antenna effectively dwindle.
A kind of planar inverted F-shape antenna is arranged on the substrate, and it comprises ground metal layer, Department of Radiation, open circuit, junction and feeding portion.Ground metal layer is arranged on the substrate.Department of Radiation is used to receive and dispatch radiofrequency signal, and it comprises first kink and open end.First kink and open end electrically connect.Open circuit is electrically connected between Department of Radiation and the ground metal layer, and it comprises second kink.The junction electrically connects open circuit and Department of Radiation.Feeding portion is electrically connected at the junction, is used for FD feed.
First kink and second kink can make the occupied area of planar inverted F-shape antenna effectively dwindle.
Description of drawings
Fig. 1 is the schematic diagram of existing planar inverted F-shape antenna.
Fig. 2 is the schematic diagram of planar inverted F-shape antenna one execution mode of the present invention.
Fig. 3 is the size marking figure of embodiment of the present invention midplane inverted F shaped antenna.
Fig. 4 is the reflection loss resolution chart of embodiment of the present invention midplane inverted F shaped antenna.
Fig. 5 is that to work in frequency be the vertical radiation field pattern figure of 2.40GHz on the YZ plane to embodiment of the present invention midplane inverted F shaped antenna.
Fig. 6 is that to work in frequency be the vertical radiation field pattern figure of 2.45GHz on the YZ plane to embodiment of the present invention midplane inverted F shaped antenna.
Fig. 7 is that to work in frequency be the vertical radiation field pattern figure of 2.50GHz on the YZ plane to embodiment of the present invention midplane inverted F shaped antenna.
Fig. 8 is that to work in frequency be the horizontal radiation field pattern figure of 2.40GHz on the YZ plane to embodiment of the present invention midplane inverted F shaped antenna.
Fig. 9 is that to work in frequency be the horizontal radiation field pattern figure of 2.45GHz on the YZ plane to embodiment of the present invention midplane inverted F shaped antenna.
Figure 10 is that to work in frequency be the horizontal radiation field pattern figure of 2.50GHz on the YZ plane to embodiment of the present invention midplane inverted F shaped antenna.
Figure 11 is that to work in frequency be the vertical radiation field pattern figure of 2.40GHz on the XY plane to embodiment of the present invention midplane inverted F shaped antenna.
Figure 12 is that to work in frequency be the vertical radiation field pattern figure of 2.45GHz on the XY plane to embodiment of the present invention midplane inverted F shaped antenna.
Figure 13 is that to work in frequency be the vertical radiation field pattern figure of 2.50GHz on the XY plane to embodiment of the present invention midplane inverted F shaped antenna.
Figure 14 is that to work in frequency be the horizontal radiation field pattern figure of 2.40GHz on the XY plane to embodiment of the present invention midplane inverted F shaped antenna.
Figure 15 is that to work in frequency be the horizontal radiation field pattern figure of 2.45GHz on the XY plane to embodiment of the present invention midplane inverted F shaped antenna.
Figure 16 is that to work in frequency be the horizontal radiation field pattern figure of 2.50GHz on the XY plane to embodiment of the present invention midplane inverted F shaped antenna.
Figure 17 is that to work in frequency be the vertical radiation field pattern figure of 2.40GHz on the XZ plane to embodiment of the present invention midplane inverted F shaped antenna.
Figure 18 is that to work in frequency be the vertical radiation field pattern figure of 2.45GHz on the XZ plane to embodiment of the present invention midplane inverted F shaped antenna.
Figure 19 is that to work in frequency be the vertical radiation field pattern figure of 2.50GHz on the XZ plane to embodiment of the present invention midplane inverted F shaped antenna.
Figure 20 is that to work in frequency be the horizontal radiation field pattern figure of 2.40GHz on the XZ plane to embodiment of the present invention midplane inverted F shaped antenna.
Figure 21 is that to work in frequency be the horizontal radiation field pattern figure of 2.45GHz on the XZ plane to embodiment of the present invention midplane inverted F shaped antenna.
Figure 22 is that to work in frequency be the horizontal radiation field pattern figure of 2.50GHz on the XZ plane to embodiment of the present invention midplane inverted F shaped antenna.
Embodiment
Consult Fig. 2, be the schematic diagram of planar inverted F-shape antenna one execution mode of the present invention.In the present embodiment, planar inverted F-shape antenna is arranged on the substrate 100, and it comprises ground metal layer 200, Department of Radiation 300, open circuit 400, junction 700 and feeding portion 500.Ground metal layer 200 is arranged on the substrate 100, and it comprises feed-in structure 600.Junction 700 electrically connects open circuit 400 and Department of Radiation 300.
Department of Radiation 300 is used to receive and dispatch radiofrequency signal.In the present embodiment, Department of Radiation 300 is made by metal.Department of Radiation 300 comprises open end 310, first kink 320 and first link 330.Open end 310 is unsettled.
First kink 320 is arranged between the open end 310 and first link 330.In the present embodiment, first kink 320 can be pectination type, W type, S type or U type etc.The bearing of trend of first kink 320 is parallel to ground metal layer 200.
In the present embodiment, first kink 320 can increase transmission loss (Loss), reduces qualitative factor (Quality Factor), thereby increases frequency range.
First kink 320 can be under the prerequisite of radiofrequency signal operation wavelength 1/2 in the current feed circuit electrical path length that keeps planar inverted F-shape antenna, with the air line distance shortening of open end 310 and first link 330, thereby dwindles the straight length of Department of Radiation 300.So, effective occupied area of reduced plan inverted F shaped antenna.
In addition, first kink 320 can make planar inverted F-shape antenna have better omni-directional radiation pattern.
Open circuit 400 is electrically connected between Department of Radiation 300 and the ground metal layer 200.In the present embodiment, open circuit 400 staggers near a side and the ground metal layer 200 of feeding portion 500.In other embodiments, open circuit 400 also can be concordant with ground metal layer 200 near a side of feeding portion 500.
Open circuit 400 comprises second link 410, right angle end 420, second kink 430 and the 3rd link 440.The 3rd link 440 links to each other with the ground connection perforation (not shown) of ground metal layer 200, is used for ground connection.Second link 410 is connected in the junction 700 with first link 330.In the present embodiment, junction 700 is polygon, and it can strengthen open circuit (Open) effect of planar inverted F-shape antenna, thereby makes planar inverted F-shape antenna that reflection loss preferably be arranged.In other embodiments, junction 700 also can be other shape.
Second kink 430 is arranged between right angle end 420 and the 3rd link 440.In the present embodiment, second kink 430 can be pectination type, W type, S type or U type etc.The bearing of trend of second kink 430 is perpendicular to ground metal layer 200.
Second kink 430 can be under the prerequisite of radiofrequency signal operation wavelength 1/4 in the length that keeps open circuit 400, with the air line distance shortening of right angle end 420 and the 3rd link 440, thereby dwindles the length of open circuit 400.So, effective occupied area of reduced plan inverted F shaped antenna.
Feeding portion 500 is electrically connected at junction 700, is used for FD feed.In the present embodiment, feeding portion 500 is 50 ohm a transmission line.Feeding portion 500 is connected to junction 700 along the direction parallel with open circuit 400, and the feed-in structure 600 that passes ground metal layer 200 simultaneously is connected to match circuit, in order to produce matched impedance.
In the present embodiment, ground metal layer 200, Department of Radiation 300, open circuit 400 and feeding portion 500 are the printed circuit that is distributed on the substrate 100.
Consult Fig. 3, be the size marking figure of embodiment of the present invention midplane inverted F shaped antenna.In the present embodiment, the length L 1 of Department of Radiation 300 is about 11.13mm, and width W 1 is about 3.5mm.The length L 2 of open circuit 400 is about 6mm, and width W 2 is about 1.5mm.
The parameter X 1 of first kink 320 is about 0.5mm, and parameter X 2 is about 1mm, and parameter X 3 is about 0.5mm.The parameter Y1 of second kink 430 is about 0.5mm, and parameter Y2 is about 0.5mm, and parameter Y3 is about 1mm.
The parameter Z 1 of junction 700 is about 1mm, and parameter Z 2 is about 1mm, and parameter Z 3 is about 0.5mm, and parameter Z 4 is about 0.87mm, and parameter Z 5 is about 1.5mm.
The distance L 4 of the feeding portion 500 and second kink 430 is about 1.53mm, and the distance L 5 of the feeding portion 500 and first kink 320 is about 1.63mm.
Planar inverted F-shape antenna in the present embodiment owing to comprise first kink 320, second kink 430 and junction 700, can effectively reduce the occupied area of planar inverted F-shape antenna, and has good reflection loss, and has isotropic radiation pattern.
Consult Fig. 4, be reflection loss (Return Loss) resolution chart of embodiment of the present invention midplane inverted F shaped antenna.Embodiment of the present invention midplane inverted F shaped antenna is the working frequency range that is applied to 802.11b/g, promptly is applied to the frequency range between 2.4～2.5GHZ.By diagram as can be known, its reflection loss is all less than-10dB.
Consulting Fig. 5 to Figure 22, is 2.40GHz, 2.45GHz and 2.50GHz for embodiment of the present invention midplane inverted F shaped antenna works in frequency respectively, the vertical and horizontal radiation field pattern figure on YZ, XY and XZ plane.By test result as can be known, the radiation pattern of embodiment of the present invention midplane inverted F shaped antenna is omni-directional (Omni-Directional) under three kinds of operating frequencies.
Though the present invention illustrates as above with better embodiment, so the structure of this planar inverted F-shape antenna and non-limiting are used in IEEE 802.11, as long as amplify or minification and being adjusted, can change to various planar inverted F-shape antenna arbitrarily.

Claims (10)

1. a planar inverted F-shape antenna is arranged on the substrate, it is characterized in that, described planar inverted F-shape antenna comprises:
Ground metal layer is arranged on the described substrate;
Department of Radiation is used to receive and dispatch radiofrequency signal, and described Department of Radiation comprises first kink and open end, and described first kink and described open end electrically connect;
Open circuit is electrically connected between described Department of Radiation and the described ground metal layer, and described open circuit comprises second kink;
The junction electrically connects described open circuit and described Department of Radiation; And
Feeding portion is electrically connected at described junction, is used for FD feed.
2. planar inverted F-shape antenna as claimed in claim 1 is characterized in that described feeding portion is parallel with described open circuit.
3. planar inverted F-shape antenna as claimed in claim 1 is characterized in that the bearing of trend of described first kink is parallel to described ground metal layer.
4. planar inverted F-shape antenna as claimed in claim 1 is characterized in that the bearing of trend of described second kink is perpendicular to described ground metal layer.
5. planar inverted F-shape antenna as claimed in claim 1 is characterized in that, described open end is unsettled.
6. planar inverted F-shape antenna as claimed in claim 1 is characterized in that described junction is polygon.
7. planar inverted F-shape antenna as claimed in claim 1 is characterized in that described ground metal layer comprises feed-in structure.
8. planar inverted F-shape antenna as claimed in claim 7 is characterized in that described feeding portion passes described feed-in structure and is connected to match circuit.
9. planar inverted F-shape antenna as claimed in claim 8 is characterized in that, described open circuit is concordant with described ground metal layer near a side of described feeding portion.
10. planar inverted F-shape antenna as claimed in claim 8 is characterized in that, described open circuit staggers near a side and the described ground metal layer of described feeding portion.
CN 200610060934 2006-06-02 2006-06-02 Plane inverse F-type antenna Pending CN101083352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200610060934 CN101083352A (en) 2006-06-02 2006-06-02 Plane inverse F-type antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200610060934 CN101083352A (en) 2006-06-02 2006-06-02 Plane inverse F-type antenna

Publications (1)

Publication Number Publication Date
CN101083352A true CN101083352A (en) 2007-12-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102340054A (en) * 2010-07-27 2012-02-01 智易科技股份有限公司 Wireless network device and flat plane antenna thereof
US8779992B2 (en) 2010-07-02 2014-07-15 Arcadyan Technology Corporation Wireless communication apparatus and planar antenna thereof
CN104882666A (en) * 2015-05-07 2015-09-02 深圳市共进电子股份有限公司 Small-sized planar high-gain inverted-F antenna
CN108808236A (en) * 2018-06-20 2018-11-13 袁涛 Small-sized half-duplex antenna applied to the fields NB-IoT

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8779992B2 (en) 2010-07-02 2014-07-15 Arcadyan Technology Corporation Wireless communication apparatus and planar antenna thereof
CN102340054A (en) * 2010-07-27 2012-02-01 智易科技股份有限公司 Wireless network device and flat plane antenna thereof
CN102340054B (en) * 2010-07-27 2014-07-02 智易科技股份有限公司 Wireless network device and flat plane antenna thereof
CN104882666A (en) * 2015-05-07 2015-09-02 深圳市共进电子股份有限公司 Small-sized planar high-gain inverted-F antenna
CN108808236A (en) * 2018-06-20 2018-11-13 袁涛 Small-sized half-duplex antenna applied to the fields NB-IoT

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Application publication date: 20071205