WO2012109801A1 - A meander line antenna - Google Patents

A meander line antenna Download PDF

Info

Publication number
WO2012109801A1
WO2012109801A1 PCT/CN2011/071110 CN2011071110W WO2012109801A1 WO 2012109801 A1 WO2012109801 A1 WO 2012109801A1 CN 2011071110 W CN2011071110 W CN 2011071110W WO 2012109801 A1 WO2012109801 A1 WO 2012109801A1
Authority
WO
WIPO (PCT)
Prior art keywords
meandering section
mla
dielectric substrate
printed
meandering
Prior art date
Application number
PCT/CN2011/071110
Other languages
French (fr)
Inventor
Wei Qiu
Lei Ming Xu
Ling Wang
Shu Feng ZHENG
Ying Zeng YIN
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to PCT/CN2011/071110 priority Critical patent/WO2012109801A1/en
Priority to CN2011800679375A priority patent/CN103380541A/en
Publication of WO2012109801A1 publication Critical patent/WO2012109801A1/en

Links

Classifications

    • 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

Definitions

  • the invention relates to antenna technology, in particular, to a meander line antenna (MLA).
  • MLA meander line antenna
  • An MLA is constructed by continuously folding a conventional monopole.
  • FIG. 1 illustrates the structure of a conventional MLA.
  • W represents the width of the meandering section
  • N represents the number of folders of the meandering section
  • S represents the spacing between the lines of the meandering section.
  • MLA can provide omni-directional radiation, and has considerable radiation efficiency, negligible cross polarization.
  • the impedance bandwidth of the MLA is relatively narrow, and its input impedance which is greatly influenced by the radius (or width) and the spacing between lines of the meandering section of the MLA, is inclined to show a strong inductive part and a large real part, which makes the MLA very sensitive to impedance matching.
  • an MLA with a wide impedance bandwidth is provided.
  • an MLA which comprises:
  • 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 MLA further includes a ground plane 15, printed below the second meandering section 12.
  • the MLA further includes a sleeve on the ground plane 15 and close to both sides of the bottom of the second meandering section 12.
  • the shorting pin 14 is adapted to connect the first meandering section 11 and the second meandering section 12 at the feed point by metal pins.
  • Another aspect of the present invention provides an MLA with a wide impedance bandwidth and can be well matched to 50 Ohms feed line, which includes:
  • first meandering section 11 printed on a first side of a dielectric substrate
  • second meandering section 12 printed on a second side of the dielectric substrate
  • first meandering section 11 is a meandering metal strip
  • first meandering section 11 and the second meandering section 12 are in mirror symmetry way with respect to the dielectric substrate
  • microstrip feedline 23 printed on the first side of the dielectric substrate and connecting to a second end of the first capacitive strip 21 at a feed point;
  • the first capacitive strip 21 and the second capacitive strip 22 are both in a rectangular shape.
  • the first meandering section 11 and the second meandering section 12 are both in a tapered shape or in a trapezia shape.
  • the ML A further includes a ground plane 16, printed below the second capacitive strip 22.
  • the ML A further includes a sleeve 17 on the ground plane 16 and close to both sides of the bottom of the second capacitive strip 22.
  • the shorting pin 24 is adapted to connect the first capacitive strip 21 and the second capacitive strip 22 at the feed point by metal pins.
  • the shorting pin 24 is adapted to connect the second end of the first capacitive strip 21 and a second end of the second capacitive strip 22 at the feed point.
  • aspects of the present invention provides improved MLAs with a double-layered meandering section, in which the reactance part of the input impedance at the feed point is nearly halved, while the resistance part of the input impedance remains unchanged. In this case the quality factor is greatly reduced, and the impedance bandwidth is expanded.
  • Figure 1 is a schematic diagram illustrating the structure of a conventional MLA
  • Figure 2a is a schematic diagram illustrating the structure of an MLA according to a first embodiment of the present invention
  • Figure 2b is a schematic diagram illustrating the structure of an MLA according to a first embodiment of the present invention
  • Figure 3a is a schematic diagram illustrating the structure of an MLA according to a second embodiment of the present invention.
  • Figure 3b is a schematic diagram illustrating the structure of an MLA according to a second embodiment of the present invention.
  • Figure 4a is a schematic diagram illustrating the structure of an MLA with its first meandering section in a tapered shape
  • Figure 4b is a schematic diagram illustrating the structure of an MLA with its second meandering section in a tapered shape
  • Figure 5 illustrates measured VSWR variations versus frequency of an MLA with a tapered meandering section printed on both sides of a dielectric substrate as well as that of an MLA with a tapered meandering section printed on a single side of a dielectric substrate.
  • the embodiment of the invention provides an improved MLA.
  • the MLA has a double- layered meandering section in a planar form, printed on both sides of a dielectric substrate.
  • Figure 2a and 2b illustrate the structure of the MLA proposed, where Figure 2a shows a first side of the dielectric substrate; Figure 2b shows a second side of the dielectric substrate.
  • the MLA provided in this embodiment includes the following components:
  • first meandering section 11 printed on the first side of the dielectric substrate
  • second meandering section 12 printed on the second side of the dielectric substrate
  • first meandering section 11 is a meandering metal strip
  • first meandering section 11 and the second meandering section 12 are in mirror symmetry way with respect to the dielectric substrate
  • 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;
  • 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 at least one shorting pin 14 connects the first meandering section 11 and the second meandering section 12 by at least one metal pin.
  • the MLA further includes a ground plane 15, printed on the second side of the dielectric substrate below the second meandering section 12.
  • a ground plane 15 printed on the second side of the dielectric substrate below the second meandering section 12.
  • the inductance and self-capacitance of the MLA caused by the meandering section are nearly halved, the mutual capacitance caused by the double-layered meandering section is increased and the conductive loss, which is negligible at a low frequency, though, is doubled, while the dielectric loss remains unchanged. That is, the reactance part of the input impedance at the feed point is nearly halved, while the resistance part of the input impedance remains unchanged. In this case, the quality factor of the MLA is greatly reduced, and thus the impedance bandwidth of the MLA is expanded.
  • Method 1 configuring the first meandering section 11 and the second meandering section 12 in a tapered shape or a trapezia shape which is wide at the top and narrow at the bottom;
  • Method 2 increasing the width of the first meandering section 11 and the width of the second meandering section 12;
  • Method 3 on the ground plane 15, adding a sleeve close to both sides of the bottom of the second meandering section 12.
  • the sleeve is printed on the second side of the dielectric substrate.
  • this embodiment provides an improved MLA.
  • a capacitive mental strip is added on each side of the dielectric substrate.
  • Figure 3a and 3b illustrate the structure of the MLA proposed, where Figure 3a shows a first side of the dielectric substrate, Figure 3b shows a second side of the dielectric substrate .
  • the MLA provided in this embodiment includes the following components:
  • first meandering section 11 printed on the first side of the dielectric substrate
  • second meandering section 12 printed on the second side of the dielectric substrate
  • first meandering section 11 is a meandering metal strip
  • first meandering section 11 and the second meandering section 12 are in mirror symmetry way with respect to the dielectric substrate
  • microstrip feedline 23 printed on the first side of the dielectric substrate and connecting to a second end of the first capacitive strip 21 at a feed point;
  • the at least one shorting pin 14 connects the second end of the first capacitive strip 21 and a second end of the second capacitive strip 22 by at least one metal pin.
  • the first capacitive strip 21 and the second capacitive strip 22 are both in a rectangular shape.
  • the MLA further includes a ground plane 16, printed on the second side of the dielectric substrate below the second capacitive strip 22.
  • the impedance bandwidth of the MLA with a double- layered meandering section is significantly increased.
  • the equivalent inductance and capacitance of the MLA can be changed by varying the characteristics of the meandering section.
  • the equivalent inductance of the MLA should counteract the equivalent capacitance of the MLA, which usually requires a small space between the lines of the meandering section and a high processing accuracy.
  • the equivalent capacitance of the MLA can be significantly increased, and the capacitance value of the capacitive mental strip can be adjusted by adjusting the size of capacitive strip to counteract the inductance of the MLA.
  • the MLA can be well matched to 50 Ohms feed line without any external impedance matching network or tuning stubs, thus to solve the problem of sensitive impedance matching of the conventional MLA.
  • the MLA provided by this embodiment has a wide impedance bandwidth and can be well matched to 50 Ohms feed line.
  • Method 1 configuring the first meandering section 11 and the second meandering section 12 in a tapered shape or a trapezia shape which is wide at the top and narrow at the bottom;
  • Method 2 increasing the width of the first meandering section 11 and the second meandering section 12;
  • Method 3 on the ground plane 16, adding a sleeve 17 close to both sides of the bottom of the second capacitive strip 22.
  • the sleeve is printed on the second side of the dielectric substrate.
  • Figure 4a and 4b are schematic diagrams illustrating the structure of an MLA with its first meandering section 11 and its second meandering section 12 in a tapered shape.
  • Figure 4a shows the first side of the dielectric substrate and
  • figure 4b shows the second side of the dielectric substrate.
  • the sleeve 17 is also illustrated.
  • VSWR Voltage Standing Wave Ratio

Landscapes

  • Waveguide Aerials (AREA)

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

A Meander Line Antenna
Field of the Invention
The invention relates to antenna technology, in particular, to a meander line antenna (MLA). Background of the Invention
Miniaturization of an antenna is highly in demand in the modern wireless communication systems. This requirement may bring challenges to the work of antenna engineers in some application especially where omni-directional radiation, broadband operation and relative high gain are desired simultaneously.
An MLA is constructed by continuously folding a conventional monopole.
Figure 1 illustrates the structure of a conventional MLA. In figure 1, W represents the width of the meandering section, N represents the number of folders of the meandering section, S represents the spacing between the lines of the meandering section. MLA can provide omni-directional radiation, and has considerable radiation efficiency, negligible cross polarization. However, the impedance bandwidth of the MLA is relatively narrow, and its input impedance which is greatly influenced by the radius (or width) and the spacing between lines of the meandering section of the MLA, is inclined to show a strong inductive part and a large real part, which makes the MLA very sensitive to impedance matching. Summary of the Invention
To solve the above problems, an MLA with a wide impedance bandwidth is provided.
In an aspect of the present invention, an MLA is provided which comprises:
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 MLA further includes a ground plane 15, printed below the second meandering section 12.
The MLA further includes a sleeve on the ground plane 15 and close to both sides of the bottom of the second meandering section 12.
The shorting pin 14 is adapted to connect the first meandering section 11 and the second meandering section 12 at the feed point by metal pins.
Another aspect of the present invention provides an MLA with a wide impedance bandwidth and can be well matched to 50 Ohms feed line, which includes:
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 first capacitive strip 21, printed on the first side of the dielectric substrate, wherein a first end of the first capacitive strip 21 connects to the bottom of the first meandering section 11 ; a second capacitive strip 22, printed on the second side of the dielectric substrate, wherein a first end of the second capacitive strip 22 connect to the bottom of the second meandering section 12;
a microstrip feedline 23, printed on the first side of the dielectric substrate and connecting to a second end of the first capacitive strip 21 at a feed point; and
at least one shorting pin 24, adapted to connect the first capacitive strip 21 and the second capacitive strip 22 at the feed point.
The first capacitive strip 21 and the second capacitive strip 22 are both in a rectangular shape. The first meandering section 11 and the second meandering section 12 are both in a tapered shape or in a trapezia shape.
The ML A further includes a ground plane 16, printed below the second capacitive strip 22.
The ML A further includes a sleeve 17 on the ground plane 16 and close to both sides of the bottom of the second capacitive strip 22.
The shorting pin 24 is adapted to connect the first capacitive strip 21 and the second capacitive strip 22 at the feed point by metal pins.
The shorting pin 24 is adapted to connect the second end of the first capacitive strip 21 and a second end of the second capacitive strip 22 at the feed point.
Aspects of the present invention provides improved MLAs with a double-layered meandering section, in which the reactance part of the input impedance at the feed point is nearly halved, while the resistance part of the input impedance remains unchanged. In this case the quality factor is greatly reduced, and the impedance bandwidth is expanded.
Brief Description of Drawings
Figure 1 is a schematic diagram illustrating the structure of a conventional MLA;
Figure 2a is a schematic diagram illustrating the structure of an MLA according to a first embodiment of the present invention;
Figure 2b is a schematic diagram illustrating the structure of an MLA according to a first embodiment of the present invention;
Figure 3a is a schematic diagram illustrating the structure of an MLA according to a second embodiment of the present invention;
Figure 3b is a schematic diagram illustrating the structure of an MLA according to a second embodiment of the present invention;
Figure 4a is a schematic diagram illustrating the structure of an MLA with its first meandering section in a tapered shape;
Figure 4b is a schematic diagram illustrating the structure of an MLA with its second meandering section in a tapered shape; and Figure 5 illustrates measured VSWR variations versus frequency of an MLA with a tapered meandering section printed on both sides of a dielectric substrate as well as that of an MLA with a tapered meandering section printed on a single side of a dielectric substrate. Detailed Description of the Invention
In order to solve the problems of a conventional MLA, some improvements have been made to the conventional MLA. The following is the detailed description of the embodiments of the present invention accompany with the drawings.
Embodiment 1
In order to solve the problem of a narrow impedance bandwidth of the MLA, the embodiment of the invention provides an improved MLA. The MLA has a double- layered meandering section in a planar form, printed on both sides of a dielectric substrate. Figure 2a and 2b illustrate the structure of the MLA proposed, where Figure 2a shows a first side of the dielectric substrate; Figure 2b shows a second side of the dielectric substrate. As shown in Figures 2a and 2b, the MLA provided in this embodiment includes the following components:
a first meandering section 11, printed on the first side of the dielectric substrate; a second meandering section 12, printed on the 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.
In this embodiment, the at least one shorting pin 14 connects the first meandering section 11 and the second meandering section 12 by at least one metal pin.
The MLA further includes a ground plane 15, printed on the second side of the dielectric substrate below the second meandering section 12. As described above, an improved MLA with a double-layered meandering section printed on both sides of a dielectric substrate is provided. It can be seen from this double-layered structure, the electric current at the feed point (the position of the shorting pin) is divided into two parts, each of which flows into one meandering section on one side of the dielectric substrate. Since both the two meandering section are resonant at the same frequency, from the equivalent circuit point of view, each meandering section on one side of the dielectric substrate is equivalent to a resonant circuit, and the two resonant circuits are connected in parallel by one or more shorting pins. Thus the inductance and self-capacitance of the MLA caused by the meandering section are nearly halved, the mutual capacitance caused by the double-layered meandering section is increased and the conductive loss, which is negligible at a low frequency, though, is doubled, while the dielectric loss remains unchanged. That is, the reactance part of the input impedance at the feed point is nearly halved, while the resistance part of the input impedance remains unchanged. In this case, the quality factor of the MLA is greatly reduced, and thus the impedance bandwidth of the MLA is expanded.
It should be noted that, in order to further expand the impedance bandwidth of the MLA, besides adopting the double-layered structure, one or any combination of the following means can be employed:
Method 1) configuring the first meandering section 11 and the second meandering section 12 in a tapered shape or a trapezia shape which is wide at the top and narrow at the bottom;
Method 2) increasing the width of the first meandering section 11 and the width of the second meandering section 12;
Method 3) on the ground plane 15, adding a sleeve close to both sides of the bottom of the second meandering section 12. The sleeve is printed on the second side of the dielectric substrate.
Embodiment 2
In order to solve the problem of sensitive impedance matching of the conventional MLA, this embodiment provides an improved MLA. Compared to the MLA illustrated in Figures 2a and 2b, a capacitive mental strip is added on each side of the dielectric substrate. Figure 3a and 3b illustrate the structure of the MLA proposed, where Figure 3a shows a first side of the dielectric substrate, Figure 3b shows a second side of the dielectric substrate . As shown in Figures 3a and 3b, the MLA provided in this embodiment includes the following components:
a first meandering section 11, printed on the first side of the dielectric substrate; a second meandering section 12, printed on the 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 first capacitive strip 21, printed on the first side of the dielectric substrate, wherein a first end of the first capacitive strip 21 connects to the bottom of the first meandering section 11 ;
a second capacitive strip 22, printed on the second side of the dielectric substrate, wherein a first end of the second capacitive strip 21 connects to the bottom of the second meandering section 12;
a microstrip feedline 23, printed on the first side of the dielectric substrate and connecting to a second end of the first capacitive strip 21 at a feed point; and
at least one shorting pin 24, adapted to connect the first capacitive strip 21 and the second capacitive strip 22 at the feed point.
In this embodiment, the at least one shorting pin 14 connects the second end of the first capacitive strip 21 and a second end of the second capacitive strip 22 by at least one metal pin.
The first capacitive strip 21 and the second capacitive strip 22 are both in a rectangular shape.
The MLA further includes a ground plane 16, printed on the second side of the dielectric substrate below the second capacitive strip 22.
As mentioned above, the impedance bandwidth of the MLA with a double- layered meandering section is significantly increased.
Further, as the conventional MLA is a self-resonant structure, the equivalent inductance and capacitance of the MLA can be changed by varying the characteristics of the meandering section. In order to achieve impedance matching, the equivalent inductance of the MLA should counteract the equivalent capacitance of the MLA, which usually requires a small space between the lines of the meandering section and a high processing accuracy. In this embodiment, by adding a capacitive mental strip on each side of the dielectric substrate, the equivalent capacitance of the MLA can be significantly increased, and the capacitance value of the capacitive mental strip can be adjusted by adjusting the size of capacitive strip to counteract the inductance of the MLA. In this embodiment, the MLA can be well matched to 50 Ohms feed line without any external impedance matching network or tuning stubs, thus to solve the problem of sensitive impedance matching of the conventional MLA.
The MLA provided by this embodiment has a wide impedance bandwidth and can be well matched to 50 Ohms feed line.
As mentioned above, in order to further expand the impedance bandwidth of the MLA, besides adopting the double-layered structure, one or any combination of following means can be employed:
Method 1) configuring the first meandering section 11 and the second meandering section 12 in a tapered shape or a trapezia shape which is wide at the top and narrow at the bottom;
Method 2) increasing the width of the first meandering section 11 and the second meandering section 12;
Method 3) on the ground plane 16, adding a sleeve 17 close to both sides of the bottom of the second capacitive strip 22. The sleeve is printed on the second side of the dielectric substrate.
Figure 4a and 4b are schematic diagrams illustrating the structure of an MLA with its first meandering section 11 and its second meandering section 12 in a tapered shape. Figure 4a shows the first side of the dielectric substrate and figure 4b shows the second side of the dielectric substrate. In figure 4b, the sleeve 17 is also illustrated.
To better illustrate the performance of the MLA provided by this embodiment, Voltage Standing Wave Ratio (VSWR) variations versus frequency of a MLA with a tapered meandering section printed on both sides of a dielectric substrate as well as that of a MLA with a tapered meandering section printed on a single side of a dielectric substrate are measured and illustrated in figure 5. In figure 5, the curve with dots represents VSWR variations versus frequency of an MLA with a tapered meandering section printed on a single side of a dielectric substrate; the curve with squares represents VSWR variations versus frequency of an MLA with a tapered meandering section printed on both sides of a dielectric substrate. It can be seen from figure 5 that the fractional bandwidth of the MLA is broadened from 8% to 12%, which confirms that the double-layered structure can effectively broaden the impedance bandwidth of the MLA. It is also worth noting that these two kinds of ML As show nearly a same antenna gain (1.8dB), a same 3D radiation pattern and a same cross polarization level. This also shows that the MLA proposed can achieve an omni-directional radiation with a high antenna gain, a low cross polarization and a wide impedance bandwidth.

Claims

Claims
1, A meander line antenna, ML A, comprising:
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 (1 1) 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.
2, The MLA according to claim 1, wherein the MLA further comprises: a ground plane (15), printed below the second meandering section (12).
3, The MLA according to claim 2, wherein the MLA further comprises: a sleeve on the ground plane (15) and close to both sides of the bottom of the second meandering section (12).
4, The MLA according to any of claims 1 to 3, the shorting pin (14) is adapted to connect the first meandering section (11) and the second meandering section (12) at the feed point by metal pins.
5, A meander line antenna, MLA, comprising:
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 (1 1) 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 first capacitive strip (21), printed on the first side of the dielectric substrate, wherein a first end of the first capacitive strip (21) connects to the bottom of the first meandering section (11); a second capacitive strip (22), printed on the second side of the dielectric substrate, wherein a first end of the second capacitive strip (22) connects to the bottom of the second meandering section (12);
a microstrip feedline (23), printed on the first side of the dielectric substrate and connecting to a second end of the first capacitive strip (21) at a feed point; and
at least one shorting pin (24), adapted to connect the first capacitive strip (21) and the second capacitive strip (22) at the feed point.
6, The MLA according to claim 5, wherein the MLA further comprises: a ground plane (16), printed below the second capacitive strip (22).
7, The MLA according to claim 5 or 6, wherein the first capacitive strip (21) and the second capacitive strip (22) are both in a rectangular shape.
8, The MLA according to claim 6, wherein the MLA further comprises: a sleeve (17) on the ground plane (16) and close to both sides of the bottom of the second capacitive strip (22).
9, The MLA according to any of claims 5 to 8, wherein the shorting pin (24) is adapted to connect the first capacitive strip (21) and the second capacitive strip (22) at the feed point by metal pins.
10, The MLA according to any of claims 5 to 9, wherein the shorting pin (24) is adapted to connect the second end of the first capacitive strip (21) and a second end of the second capacitive strip (22).
11, The MLA according to any of claims 1 to 10, wherein the first meandering section (11) and the second meandering section (12) are both in a tapered shape or in a trapezia shape.
PCT/CN2011/071110 2011-02-18 2011-02-18 A meander line antenna WO2012109801A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2011/071110 WO2012109801A1 (en) 2011-02-18 2011-02-18 A meander line antenna
CN2011800679375A CN103380541A (en) 2011-02-18 2011-02-18 A meander line antenna

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
WO2012109801A1 true WO2012109801A1 (en) 2012-08-23

Family

ID=46671931

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/071110 WO2012109801A1 (en) 2011-02-18 2011-02-18 A meander line antenna

Country Status (2)

Country Link
CN (1) CN103380541A (en)
WO (1) WO2012109801A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
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

Citations (4)

* Cited by examiner, † Cited by third party
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
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
EP1892796A1 (en) * 2006-08-24 2008-02-27 M/A-Com, Inc. Multi section meander antenna

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2330951B (en) * 1997-11-04 2002-09-18 Nokia Mobile Phones Ltd 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
JP2003347827A (en) * 2002-05-28 2003-12-05 Ngk Spark Plug Co Ltd Antenna and radio frequency module using the same
CN2694512Y (en) * 2004-03-29 2005-04-20 连展科技（深圳）有限公司 Flat collapsible dipole antenna
US7358925B2 (en) * 2004-10-07 2008-04-15 Sony Ericsson Mobile Communications Ab Highly-integrated headset
TW200807812A (en) * 2006-07-20 2008-02-01 Wistron Neweb Corp Flat miniaturized antenna of a wireless communication device
CN101989681B (en) * 2009-08-06 2016-09-28 立积电子股份有限公司 Multi-frequency-band micro-strip zigzag type antenna

Patent Citations (4)

* Cited by examiner, † Cited by third party
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
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
EP1892796A1 (en) * 2006-08-24 2008-02-27 M/A-Com, Inc. Multi section meander antenna

Cited By (1)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
CN103380541A (en) 2013-10-30

Similar Documents

Publication Publication Date Title
EP1665461B1 (en) Electromagnetically coupled small broadband monopole antenna
US6624788B2 (en) Antenna arrangement
US7170456B2 (en) Dielectric chip antenna structure
US9190721B2 (en) Antenna device
US7453402B2 (en) Miniature balanced antenna with differential feed
US8581799B2 (en) Ground radiation antenna
EP2891212B1 (en) Broadband multi-strip patch antenna
US20130044030A1 (en) Dual Radiator Monopole Antenna
JP6528496B2 (en) Antenna device
US20150116179A1 (en) Chip antenna and communication circuit substrate for transmission and reception
JP5625829B2 (en) Antenna device
TW201436369A (en) Multiband hybrid antenna
JP2009111999A (en) Multiband antenna
US8878742B1 (en) Dipole with an unbalanced microstrip feed
US9515381B2 (en) Antenna
KR100732113B1 (en) Ceramic Antenna
KR101634824B1 (en) Inverted F Antenna Using Branch Capacitor
WO2012109801A1 (en) A meander line antenna
JP6954359B2 (en) Dual band compatible antenna device
US9831555B2 (en) Antenna device
US8462051B2 (en) Chip antenna and antenna apparatus
JP4241409B2 (en) Antenna device
TWI411163B (en) Mobile communication device
JP5811349B2 (en) Antenna device
KR20120001968A (en) Micro wideband monopole antenna

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11858705

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11858705

Country of ref document: EP

Kind code of ref document: A1