CN103380541A - A meander line antenna - Google Patents
A meander line antenna Download PDFInfo
- Publication number
- CN103380541A CN103380541A CN2011800679375A CN201180067937A CN103380541A CN 103380541 A CN103380541 A CN 103380541A CN 2011800679375 A CN2011800679375 A CN 2011800679375A CN 201180067937 A CN201180067937 A CN 201180067937A CN 103380541 A CN103380541 A CN 103380541A
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- Prior art keywords
- folding line
- line part
- printed
- medium substrate
- antenna
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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
-
- 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
-
- 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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Abstract
The present invention discloses a meander line antenna, including: a first meandering section (11), printed on a first side of a dielectric substrate; a second meandering section (12), printed on a second side of the dielectric substrate; wherein the first meandering section (11) is a meandering metal strip, and the first meandering section (11) and the second meandering section (12) are in mirror symmetry way with respect to the dielectric substrate; a microstrip feedline (13), printed on the first side of the dielectric substrate and connecting to the bottom of the first meandering section (11) at a feed point; and at least one shorting pin (14), adapted to connect the first meandering section (11) and the second meandering section (12) at the feed point. The present invention provides a double-layered meander line antenna, which has a reduced quality factor, and an enhanced impedance bandwidth.
Description
Technical field
The present invention relates to antenna technical field, particularly a kind of folding line antenna (MLA, Meander Line Antenna).
Background technology
At present, modern wireless communication system has more and more higher demand to the miniaturization of antenna.Especially need to satisfy simultaneously under the application scenarios that omnidirectional radiation, wideband operation and relatively high gain require, this demand to antenna miniaturization can be challenged to antenna works teachers' work.
MLA is a kind of small size antenna that forms by bending back and forth monopole antenna (Monopole) structure, and its structure as shown in Figure 1.W among Fig. 1 represents the width of folding line part, and N represents the number of times that folding line partly bends, and S represents the spacing between the folding line.MLA can provide omnidirectional radiation, and radiation efficiency is high, and cross polarization is little.But, the impedance bandwidth of this traditional MLA is narrow, and its input impedance is relevant with thickness (or width) and the spacing of its folding line, and input impedance is easy to present stronger induction reactance and larger input impedance real part, and this brings difficulty for the impedance matching of antenna.
Summary of the invention
In order to address the above problem, embodiments of the invention provide a kind of MLA with wider impedance bandwidth.
A kind of folding line antenna that provides according to one embodiment of the invention comprises:
Be printed on the first folding line part 11 on the first surface of medium substrate;
Be printed on the second folding line part 12 on second of described medium substrate; Wherein, described the first folding line part 11 is the metal tape of bending, and described the first folding line part 11 and described the second folding line part 12 are the mirror image symmetric relation about described medium substrate;
Be printed on the microstrip feed line 13 on the first surface of described medium substrate, be connected with the bottom of described the first folding line part 11, wherein, described microstrip feed line 13 is distributing point with the tie point of described the first folding line part 11; And
At least one grounding probe 14 at described distributing point place is used for connecting described the first folding line part 11 and described the second folding line part 12.
Above-mentioned folding line antenna further comprises: stratum 15 is printed on the below of the second folding line part 12.
Above-mentioned folding line antenna further comprises: be positioned on the described stratum 15 and the sleeve by described the second folding line part 12 two bottom sides.
The folding line antenna that an alternative embodiment of the invention provides has wider impedance bandwidth and can better mate 50 ohm of feeder lines comprises:
Be printed on the first folding line part 11 on the first surface of medium substrate;
Be printed on the second folding line part 12 on second of described medium substrate; Wherein, described the first folding line part 11 is the metal tape of bending, and described the first folding line part 11 and described the second folding line part 12 are the mirror image symmetric relation about described medium substrate;
Be printed on the first capacitive band 21 on the first surface of described medium substrate, its first end links to each other with the bottom of described the first folding line part 11;
Be printed on the second capacitive band 22 on second of described medium substrate, its first end links to each other with the bottom of described the second folding line part 12;
Be printed on the microstrip feed line 23 on the first surface of described medium substrate, be connected with the second end of described the first capacitive band 21, wherein, described microstrip feed line 23 is distributing point with the tie point of described the first capacitive band 21; And
At least one grounding probe 24 at described distributing point place is used for connecting described the first capacitive band 21 and described the second capacitive band 22.
Above-mentioned the first capacitive band 21 and described the second capacitive band 22 are rectangle.
The first folding line part 11 and the second folding line part 12 are taper or trapezoidal.
Above-mentioned folding line antenna further comprises: stratum 16 is printed on the below of the second capacitive band 22.
Above-mentioned folding line antenna further comprises: be positioned on the described stratum 16 and the sleeve 17 by described the second capacitive band 22 two bottom sides.
Above-mentioned grounding probe 24 is used for connecting described the first capacitive band 21 and described the second capacitive band 22 at described distributing point place by metal probe.
Above-mentioned grounding probe 24 is for connect the second end of described the first capacitive band 21 and the second end of described the second capacitive band 22 at described distributing point place.
The improved folding line antenna that the embodiment of the invention provides has adopted double-deck folding line part, so that the folding line antenna reduces by half and active component remains unchanged at the reaction component of distributing point place input impedance, thereby can effectively reduce the quality factor of folding line antenna, and then increase the impedance bandwidth of folding line antenna.
Description of drawings
Fig. 1 is the structural representation of traditional MLA;
Fig. 2 a is the structural representation of the embodiment of the invention 1 described MLA;
Fig. 2 b is the structural representation of the embodiment of the invention 1 described MLA;
Fig. 3 a is the structural representation of the embodiment of the invention 2 described MLA;
Fig. 3 b is the structural representation of the embodiment of the invention 2 described MLA;
Fig. 4 a has shown the structural representation when a kind of MLA partly is set to taper with the first folding line;
Fig. 4 b has shown the structure when a kind of MLA partly is set to taper with the second folding line; And
Fig. 5 has shown all have the voltage standing wave ratio (VSWR) of MLA that taper folding line part and a face at medium substrate have taper folding line part with the curve of frequency change on two faces of medium substrate.
Embodiment
The problem that exists in order to solve traditional MLA, the present invention improves traditional MLA.Describe in detail according to specific embodiment of the present invention below in conjunction with accompanying drawing.
Embodiment 1
In order to solve the narrower problem of traditional MLA impedance bandwidth, embodiments of the invention provide a kind of improved MLA, this MLA has double-deck folding line part, and it is printed on respectively on two faces of medium substrate (Dielectric Substrate) with plane form.Fig. 2 a, 2b have shown the structure of the described MLA of present embodiment, and wherein, Fig. 2 a has shown the first surface of medium substrate; Fig. 2 b has shown second of medium substrate.Shown in Fig. 2 a and 2b, the described MLA of present embodiment mainly comprises with lower member:
Be printed on the first folding line part (the Meandering Section) 11 on the first surface of medium substrate;
Be printed on the second folding line part 12 on second of medium substrate; Wherein, the first folding line part 11 is the metal tape of bending, and described the first folding line part 11 and described the second folding line part 12 are the mirror image symmetric relation about medium substrate;
Be printed on the microstrip feed line (Microstrip Feedline) 13 on the first surface of medium substrate, be connected with the bottom of described the first folding line part 11, wherein, the tie point of microstrip feed line 13 and the first folding line part 11 is distributing point; And
At least one grounding probe at distributing point place (Shorting Pin) 14 is used for connecting the first folding line part 11 and the second folding line part 12.
In the present embodiment, described at least one grounding probe 14 can pass through at least one metal probe (Metal Pin) connection the first folding line part 11 and the second folding line part 12.
Above-mentioned MLA can further include: stratum 15 is printed on the below of second upper the second folding line part 12 of medium substrate.
As mentioned above, present embodiment of the present invention provides a kind of improved MLA, and it has adopted the double-deck folding line part that is printed on two faces of medium substrate.Can find out that from this double-decker the electric current of distributing point place (also being the position of grounding probe) is divided into two parts, the electric current of every part enters respectively the folding line part on face of medium substrate.Because described two folding line partial resonances are in same frequency, therefore from the viewpoint of equivalent electric circuit, folding line part on every one side of medium substrate can equivalence be a resonant tank, they are in parallel by one or more grounding probes, thereby so that the inductance that is mainly produced by the folding line part and self-capacitance are close to reduces by half, and the mutual capacitance that comes between the folding line part of described bilayer increases, and conductor losses doubles (conductor losses can be ignored when low frequency) and dielectric loss is constant simultaneously.That is to say that be close at the reaction component of the input impedance at distributing point place and reduce by half and active component (corresponding loss) is almost constant, this further increases the impedance bandwidth of MLA so that the quality factor of MLA reduce.
Need to prove, adopting on the above-mentioned double-deck basis, in order further to increase the impedance bandwidth of MLA, can also further adopt one of following three kinds of methods or its combination in any:
Method 1) above-mentioned the first folding line part 11 and the second folding line part 12 are set to the taper of the wide narrow base in top or trapezoidal;
Method 2) width of above-mentioned the first folding line part 11 of increase and the second folding line part 12;
Method 3) on the next door of the both sides of above-mentioned the second folding line part 12 bottoms, stratum 15, increases sleeve (Sleeve).Wherein, this sleeve is printed on second of medium substrate.
In order further to solve traditional MLA impedance matching hard problem, present embodiment provides another kind of improved MLA.This MLA compares with the MLA shown in Fig. 2 a, the 2b, and each face at medium substrate has increased a capacitive metal tape respectively.Fig. 3 a, 3b have shown the structure of the described MLA of present embodiment, and wherein, Fig. 3 a has shown the first surface of medium substrate; Fig. 3 b has shown second of medium substrate.Shown in Fig. 3 a and 3b, the described MLA of present embodiment mainly comprises with lower member:
Be printed on the first folding line part 11 on the first surface of medium substrate;
Be printed on the second folding line part 12 on second of medium substrate; Wherein, the first folding line part 11 is the metal tape of bending, and described the first folding line part 11 and described the second folding line part 12 are the mirror image symmetric relation about medium substrate;
Be printed on the first capacitive band 21 on the first surface of medium substrate, its first end links to each other with the bottom of the first folding line part 11;
Be printed on the second capacitive band 22 on second of medium substrate, its first end links to each other with the bottom of the second folding line part 12;
Be printed on the microstrip feed line 23 on the first surface of described medium substrate, be connected with the second end of the first capacitive band 21, wherein, the tie point of microstrip feed line 13 and the first capacitive band 21 is distributing point; And
At least one grounding probe 24 at described distributing point place is used for connecting the first capacitive band 21 and the second capacitive band 22.
In the present embodiment, described at least one grounding probe 24 can connect the second end of the first capacitive band 21 and the second end of the second capacitive band 22 by at least one metal probe.
Wherein, above-mentioned the first capacitive band 21 and the second capacitive band 22 are rectangle.
In addition, above-mentioned MLA can further include: stratum 16 is printed on the below of second upper the second capacitive band 22 of medium substrate.
As previously mentioned, therefore the described MLA of present embodiment can significantly increase the impedance bandwidth of MLA owing to adopted double-deck folding line part.
Because traditional MLA is a self-resonance structure, the inductance that it is equivalent and capacitive part can change by the feature that changes the folding line part.In order to realize impedance matching, the equivalent inductance of MLA should be able to be offset equivalent capacity, and this needs interval between the little folding line and high machining accuracy usually.In the present embodiment, by increase respectively the capacitive metal tape on each face of medium substrate, the equivalent capacity of MLA is significantly increased, the capacitance of capacitive metal tape can be regulated by the size of regulating the capacitive band, with the inductance of effective counteracting MLA.In the present embodiment, do not need outside impedance matching network or tuning stub (Tuning Stub) just can realize the impedance matching of MLA and 50 ohm of feeder lines, thereby solved traditional MLA impedance matching hard problem.
The described MLA of present embodiment has wider impedance bandwidth and can better mate 50 ohm of feeder lines.
As previously mentioned, in order further to increase the impedance bandwidth of MLA, adopting on the above-mentioned double-deck basis, can also further adopt one of following three kinds of methods or its combination in any:
Method 1) above-mentioned the first folding line part 11 and the second folding line part 12 are set to the taper of the wide narrow base in top or trapezoidal;
Method 2) width of above-mentioned the first folding line part 11 of increase and the second folding line part 12;
Method 3) on above-mentioned capacitive band 22 two bottom sides next door, stratum 16, increases sleeve 17.Wherein, this sleeve is printed on second of medium substrate.
Fig. 4 a, 4b have shown the structural representation when a kind of MLA is set to taper with the first folding line part 11 and the second folding line part 12, and wherein, Fig. 4 a has shown the first surface of medium substrate, and Fig. 4 b has shown second of medium substrate.Also shown sleeve 17 among Fig. 4 b.
For the performance of MLA that present embodiment provides better is described, the MLA that on two faces of medium substrate, all has taper folding line part and the MLA that has taper folding line part at a face of medium substrate have been measured respectively, obtain the voltage standing wave ratio (VSWR of these two kinds of MLA, Voltage Standing Wave Ratio) with the curve of frequency change, as shown in Figure 5.Wherein, the curve representative with round dot has the VSWR of taper folding line MLA partly with the curve of frequency change at a face of medium substrate; On two faces of medium substrate, all has the VSWR of taper folding line MLA partly with the curve of frequency change with foursquare curve representative.As can be seen from Figure 5, the fractional bandwidth of MLA is by 8% broadening to 12%, and this has just confirmed can effectively improve by this double-decker the impedance bandwidth of MLA.In addition, it is worthy of note that these two kinds of MLA present roughly the same antenna gain (1.8dB), identical 3D antenna pattern and identical cross polarization level.This has just illustrated that also this MLA can realize omnidirectional radiation, has simultaneously higher antenna gain, lower cross polarization and wider impedance bandwidth.
Claims (11)
1. folding line antenna, described folding line antenna comprises:
Be printed on the first folding line part (11) on the first surface of medium substrate;
Be printed on the second folding line part (12) on second of described medium substrate; Wherein, described the first folding line part (11) is metal tape of bending, and described the first folding line part (11) and described the second folding line partly (12) be the mirror image symmetric relation about described medium substrate;
Be printed on the microstrip feed line (13) on the first surface of described medium substrate, be connected with the bottom of described the first folding line part (11), wherein, described microstrip feed line (13) is distributing point with the tie point of described the first folding line part (11); And
At least one grounding probe (14) at described distributing point place is used for connecting described the first folding line part (11) and described the second folding line part (12).
2. folding line antenna according to claim 1, described folding line antenna further comprises: stratum (15) are printed on the below of described the second folding line part (12).
3. folding line antenna according to claim 2, described folding line antenna further comprises: be positioned on the described stratum (15) and at the sleeve on described the second folding line part (12) two bottom sides next door.
4. each described meandered antenna in 3 according to claim 1, wherein, described grounding probe (14) is used at described distributing point place connecting described the first folding line part (11) and described the second folding line partly (12) by metal probe.
5. folding line antenna, described folding line antenna comprises:
Be printed on the first folding line part (11) on the first surface of medium substrate;
Be printed on the second folding line part (12) on second of described medium substrate; Wherein, described the first folding line part (11) is metal tape of bending, and described the first folding line part (11) and described the second folding line partly (12) be the mirror image symmetric relation about described medium substrate;
Be printed on the first capacitive band (21) on the first surface of described medium substrate, its first end links to each other with the bottom of described the first folding line part (11);
Be printed on the second capacitive band (22) on second of described medium substrate, its first end links to each other with the bottom of described the second folding line part (12);
Be printed on the microstrip feed line (23) on the first surface of described medium substrate, be connected with the second end of described the first capacitive band (21), wherein, described microstrip feed line (23) is distributing point with the tie point of described the first capacitive band (21); And
At least one grounding probe (24) at described distributing point place is used for connecting described the first capacitive band (21) and described the second capacitive band (22).
6. folding line antenna according to claim 5, described folding line antenna further comprises: stratum (16) are printed on the below of the second capacitive band (22).
7. according to claim 5 or 6 described folding line antennas, wherein, described the first capacitive band (21) and described the second capacitive band (22) are rectangle.
8. folding line antenna according to claim 6, described folding line antenna further comprises: be positioned on the described stratum (16) and at the sleeve (17) on described the second capacitive band (22) two bottom sides next door.
9. each described folding line antenna in 8 according to claim 5, wherein, described grounding probe (24) is used for connecting described the first capacitive band (21) and described the second capacitive band (22) at described distributing point place by metal probe.
10. each described folding line antenna in 9 according to claim 5, described grounding probe (14) is used for connecting the second end of described the first capacitive band (21) and the second end of described the second capacitive band (12).
11. each described folding line antenna in 10 according to claim 1, wherein, described the first folding line part (11) and the second folding line partly (12) are taper or trapezoidal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/071110 WO2012109801A1 (en) | 2011-02-18 | 2011-02-18 | A meander line antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103380541A true CN103380541A (en) | 2013-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800679375A Pending CN103380541A (en) | 2011-02-18 | 2011-02-18 | A meander line antenna |
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| Country | Link |
|---|---|
| CN (1) | CN103380541A (en) |
| WO (1) | WO2012109801A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018512A (en) * | 2020-08-14 | 2020-12-01 | 中北大学 | Small-size planar medical directional microwave resonance antenna |
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|---|---|---|---|---|
| US6094179A (en) * | 1997-11-04 | 2000-07-25 | Nokia Mobile Phones Limited | Antenna |
| CN1442930A (en) * | 2002-03-04 | 2003-09-17 | 日本特殊陶业株式会社 | Medium antenna of high frequency radio communication equipment |
| EP1441414A1 (en) * | 2003-01-23 | 2004-07-28 | Alps Electric Co., Ltd. | Dual band antenna with reduced size and height |
| CN1527436A (en) * | 2003-03-03 | 2004-09-08 | 正文科技股份有限公司 | Double-frequency antenna |
| CN2671143Y (en) * | 2002-05-28 | 2005-01-12 | 日本特殊陶业株式会社 | Antenna and radio frequency module |
| CN2694512Y (en) * | 2004-03-29 | 2005-04-20 | 连展科技（深圳）有限公司 | Flat collapsible dipole antenna |
| US20060097930A1 (en) * | 2004-10-07 | 2006-05-11 | Rosenberg Johan A E | Highly-integrated headset |
| TW200807812A (en) * | 2006-07-20 | 2008-02-01 | Wistron Neweb Corp | Flat miniaturized antenna of a wireless communication device |
| EP1892796A1 (en) * | 2006-08-24 | 2008-02-27 | M/A-Com, Inc. | Multi section meander antenna |
| CN101989681A (en) * | 2009-08-06 | 2011-03-23 | 立积电子股份有限公司 | Multi-frequency-band micro-strip zigzag type antenna |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001217632A (en) * | 2000-01-31 | 2001-08-10 | Matsushita Electric Ind Co Ltd | Antenna and electronic equipment |
-
2011
- 2011-02-18 CN CN2011800679375A patent/CN103380541A/en active Pending
- 2011-02-18 WO PCT/CN2011/071110 patent/WO2012109801A1/en active Application Filing
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6094179A (en) * | 1997-11-04 | 2000-07-25 | Nokia Mobile Phones Limited | Antenna |
| CN1442930A (en) * | 2002-03-04 | 2003-09-17 | 日本特殊陶业株式会社 | Medium antenna of high frequency radio communication equipment |
| CN2671143Y (en) * | 2002-05-28 | 2005-01-12 | 日本特殊陶业株式会社 | Antenna and radio frequency module |
| EP1441414A1 (en) * | 2003-01-23 | 2004-07-28 | Alps Electric Co., Ltd. | Dual band antenna with reduced size and height |
| CN1527436A (en) * | 2003-03-03 | 2004-09-08 | 正文科技股份有限公司 | Double-frequency antenna |
| CN2694512Y (en) * | 2004-03-29 | 2005-04-20 | 连展科技（深圳）有限公司 | Flat collapsible dipole antenna |
| US20060097930A1 (en) * | 2004-10-07 | 2006-05-11 | Rosenberg Johan A E | Highly-integrated headset |
| TW200807812A (en) * | 2006-07-20 | 2008-02-01 | Wistron Neweb Corp | Flat miniaturized antenna of a wireless communication device |
| EP1892796A1 (en) * | 2006-08-24 | 2008-02-27 | M/A-Com, Inc. | Multi section meander antenna |
| CN101989681A (en) * | 2009-08-06 | 2011-03-23 | 立积电子股份有限公司 | Multi-frequency-band micro-strip zigzag type antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012109801A1 (en) | 2012-08-23 |
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Application publication date: 20131030 |