KR101456568B1 - Antenna - Google Patents

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Publication number
KR101456568B1
KR101456568B1 KR1020140053281A KR20140053281A KR101456568B1 KR 101456568 B1 KR101456568 B1 KR 101456568B1 KR 1020140053281 A KR1020140053281 A KR 1020140053281A KR 20140053281 A KR20140053281 A KR 20140053281A KR 101456568 B1 KR101456568 B1 KR 101456568B1
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South Korea
Prior art keywords
line
antenna
ghz
feed
feeding
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KR1020140053281A
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Korean (ko)
Inventor
정진우
이현석
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대산전자(주)
정진우
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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H01Q13/106—Microstrip slot antennas
    • 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
    • H01Q5/10—Resonant antennas

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  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

An antenna is disclosed. The antenna according to an embodiment of the present invention includes: an emitter on which one or more slits are formed; a feeding unit which is spaced by a predetermined distance for coupling feed of the emitter; and a ground plane which is adjacent to the feeding unit, the feeding unit includes a plurality of feed lines.

Description

Antenna {ANTENNA}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna, and more particularly to an antenna incorporated in a mobile terminal.

Recently, with the rapid development of mobile communication technology, mobile terminals such as mobile phones, PDAs, and MP3s are gradually becoming smaller, more integrated, and multifunctional. Accordingly, it has been required to develop a technology capable of transmitting and receiving signals of various frequency bands in one wireless terminal. There is no switch for separating signals of different frequency bands from each other, so that a multi-band antenna has been realized by using a plurality of antennas or incorporating a plurality of radiators in an antenna. However, in this case, there is a problem that the size of the wireless terminal becomes large and the development cost increases. In addition, when transmitting and receiving signals of various frequency bands at the same time, there is a problem that interference between signals transmitted and received occurs, resulting in deterioration of transmission and reception efficiency of the antenna.

Korean Registered Patent No. 10-0783349 (December 3, 2007)

Embodiments of the present invention provide an antenna capable of smoothly transmitting and receiving signals of different frequency bands through a plurality of feed lines.

According to an exemplary embodiment of the present invention, there is provided a semiconductor device comprising: a radiator in which at least one slit is formed; A power feeder spaced apart from the radiator by a predetermined distance and coupling the radiator to the radiator; And a ground plane adjacent to the feed portion, wherein the feed portion includes a plurality of feed lines.

The line widths of the plurality of feed lines may be different from each other so that the antennas can transmit and receive signals of the plurality of frequency bands, respectively.

The power supply unit may include a first power supply line and a second power supply line, and the first power supply line and the second power supply line may be spaced apart from each other.

The first feed line and the second feed line may each have a straight line shape.

The power supply unit may include a first power supply line and a second power supply line, and the first power supply line and the second power supply line may be connected to each other.

The first feeding line and the second feeding line may be adjacent to each other to form a U-shape.

A slit may be formed on one side of the ground plane so that the antenna can transmit and receive signals of a plurality of frequency bands, respectively.

According to the embodiments of the present invention, it is possible to transmit and receive signals of different frequency bands through a plurality of feed lines, thereby realizing a multi-band antenna at a lower cost.

In addition, according to the embodiments of the present invention, it is possible to minimize interference between signals of different frequency bands by varying the line widths of the plurality of feed lines and forming the slits on the ground plane.

In addition, according to the embodiments of the present invention, it is possible to reduce the manufacturing cost of the antenna and make the overall size of the antenna smaller and lighter by transmitting and receiving signals of multiple bands using only one radiator, . Furthermore, since a coupling method is used, a separate contact terminal such as a separate c-clip or the like is unnecessary.

1 is a plan view of an antenna according to embodiments of the present invention;
2 is a sectional view of the antenna in the direction of AA 'according to the embodiments of the present invention.
3 is a view of a radiator according to embodiments of the present invention;
4 is a view showing a feeding part according to the first embodiment of the present invention;
5 is a view showing a feeding part according to a second embodiment of the present invention;
6 is a view showing a feeding part according to a third embodiment of the present invention
7 is a view showing a slit formed on the ground plane according to the embodiments of the present invention
Fig. 8 is a graph showing changes in S11 parameter and S22 parameter in the antenna shown in Fig. 7; Fig.
Fig. 9 is a diagram showing the change of S21 parameter in the antenna shown in Fig. 7
10 is a view showing a radiation pattern in the frequency band of 1.585 GHz in the antenna shown in Fig. 7
11 is a view showing a radiation pattern in a frequency band of 2.295 GHz in the antenna shown in Fig. 7
Fig. 12 is a view showing radiation patterns in the frequency band of 5.7 GHz in the antenna shown in Fig. 7
13 is a graph showing the change of the S11 parameter according to the size change of the ground plane in the antenna shown in Fig.
Fig. 14 is a graph showing the change of the S22 parameter according to the size change of the ground plane in the antenna shown in Fig. 7
FIG. 15 is a graph showing the change of the S21 parameter according to the size change of the ground plane in the antenna shown in FIG.
16 is a view showing a feeding part according to a fourth embodiment of the present invention
17 is a view showing the gain of the antenna according to the frequency in the first feed line and the second feed line in the antenna to which the feed section according to the third embodiment of the present invention is applied
18 is a view showing the gain of the antenna according to the frequency in the first feed line in the antenna to which the power feeding section according to the fourth embodiment of the present invention is applied
19 is a view showing the gain of the antenna according to the frequency in the second feed line in the antenna to which the power feeding section according to the fourth embodiment of the present invention is applied

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, this is an exemplary embodiment only and the present invention is not limited thereto.

In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

The technical idea of the present invention is determined by the claims, and the following embodiments are merely a means for efficiently describing the technical idea of the present invention to a person having ordinary skill in the art to which the present invention belongs.

FIG. 1 is a plan view of an antenna 100 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line A-A 'of an antenna 100 according to an embodiment of the present invention. 1 and 2, an antenna 100 according to embodiments of the present invention includes a ground plane 102, a feeder 104, a dielectric 106, and a radiator 108.

The ground plane 102 may be located within a wireless terminal (not shown). Here, the wireless terminal may be, for example, a cellular phone, a PDA, or MP3. The ground plane 102 may be formed on a substrate (not shown) on which circuit elements necessary for operation of the wireless terminal are coupled. The substrate may be, for example, a printed circuit board (PCB). The ground plane 102 may, for example, be rectangular. At this time, a groove portion having a predetermined size for receiving the feed portion 104 may be formed at one corner of the ground plane 102. For example, when the ground plane 102 has a size of about 135 mm x 70 mm, a groove having a size of about 20 mm x 6 mm may be formed at one corner of the ground plane 102.

The feeder 104 couples the radiator 108 to feed the radiator 108 with energy. The feed portion 104 may be formed in the groove portion and may be adjacent to the ground plane 102. The feed portion 104 may be located on the same plane as the ground plane 102.

The feeding portion 104 may include a first feeding line 104-1 and a second feeding line 104-2. Conventionally, a plurality of antennas (or radiators) are used to transmit and receive signals of different frequency bands. However, in this case, the size of a wireless terminal such as a mobile phone becomes large, and development cost increases. Accordingly, in the embodiments of the present invention, in order to transmit and receive signals of different frequency bands in one antenna 100, the feeder 104 is configured to have a plurality of feeding lines 104-1 and 104-2 Respectively. The first feed line 104-1 and the second feed line 104-2 share one radiator 108 and are formed adjacent to the ground plane 102, respectively. At this time, the first feeding line 104-1 and the second feeding line 104-2 may be spaced apart from each other. For example, the first feeding line 104-1 and the second feeding line 104-2 may have a straight line shape and may be spaced apart from each other. Here, the " straight shape " is a broad sense including not only straight lines of the feed lines 104-1 and 104-2 but also at least one bent portion extending in one direction as a whole Is used. Also, the first feeding line 104-1 and the second feeding line 104-2 may be connected to each other. For example, one end of the first feeding line 104-1 and one end of the second feeding line 104-2 are adjacent to each other to form the first feeding line 104-1 and the second feeding line 104-2, Can be connected to each other. In this case, the first feeding line 104-1 and the second feeding line 104-2 may be adjacent to each other to form a U-shape. In addition, the line width of the first feed line 104-1 and the line width of the second feed line 104-2 may be different from each other so that the antenna 100 can transmit and receive signals of different frequency bands, respectively . The shape of the feeding portion 104 will be described later in detail with reference to Figs. 4 to 6 and Fig.

The dielectric material 106 is a material having a dielectric constant similar to air or air, and separates the feeding part 104 and the radiator 108 from each other by a predetermined distance. The dielectric 106 may be formed between the feeder 104 and the radiator 108 to separate the feeder 104 and the radiator 108 from each other by a predetermined distance. The dielectric 106 may be, for example, plastic.

The radiator 108 is fed by coupling from the feeder 104 and resonates in a plurality of frequency bands. As described above, the radiator 108 may be spaced apart from the feeder 104 by a predetermined distance. Here, the plurality of frequency bands may include, for example, a frequency band of 1.5 GHz to 1.6 GHz, 2.2 GHz to 2.5 GHz, and 5.2 GHz to 5.8 GHz. That is, the radiator 108 may cause resonance in the GPS frequency band (1.5 GHz to 1.6 GHz) and the Wifi frequency band (2.2 GHz to 2.5 GHz and 5.2 GHz to 5.8 GHz), respectively. To this end, a plurality of slits having different shapes may be formed in the radiator 108. This will be described in detail with reference to FIG. In the meantime, it is described that the radiator 108 resonates in a plurality of frequency bands. However, the radiator 108 may resonate in only one specific frequency band instead of a plurality of frequency bands. Hereinafter, for ease of explanation, it is assumed that the radiator 108 resonates in a plurality of frequency bands.

3 is a view of a radiator 108 according to embodiments of the present invention. As shown in FIG. 3, the radiator 108 may be formed with a plurality of slits 108-1, 108-2, and 108-3. The first slit 108-1, the second slit 108-2 and the third slit 108-3 are formed such that the lengths l1, l2 and l3 and the widths w1, w2 and w3 are different from each other . For example, the first slit 108-1 may have a length 11 of 25 mm and a width w1 of 2 mm, and the second slit 108-2 may have a length 12 of 23 mm and a width of 3 mm (w2). The radiators 108 can cause resonance in different frequency bands by the slits 108-1, 108-2, and 108-3 having different shapes. Although slit-like slits 108-1, 108-2, and 108-3 are shown here as being formed in the radiator 108, this is only an example, and the slits 108-1, 108- 2, and 108-3 may be formed in various shapes, for example, in a shape of a letterhead. The number of slits 108-1, 108-2, and 108-3 formed in the radiator 108 is not limited to this, and various numbers (for example, one or three) of slits may be formed in the radiator 108, respectively.

FIG. 4 is a view illustrating a feeder 104 according to a first embodiment of the present invention, and FIG. 5 is a view illustrating a feeder 104 according to a second embodiment of the present invention. As described above, the feeding portion 104 includes a first feeding line 104-1 and a second feeding line 104-2. According to the embodiments of the present invention, it is possible to transmit and receive a signal in the frequency band of GPS and a signal in the Wi-Fi frequency band through the two feed lines 104-1 and 104-2, respectively, The multi-band antenna 100 can be implemented by only the two radiators 108. On the other hand, when two feed lines 104-1 and 104-2 are used as in the embodiments of the present invention, there is a risk of interference between signals transmitted and received by the feed lines 104-1 and 104-2 It is necessary to secure isolation between signals of different frequency bands. Accordingly, embodiments of the present invention reduce the interference between signals of different frequency bands by variously changing the shape of the feed lines 104-1 and 104-2 and the positions of the feed points 104a and 104b.

As shown in FIG. 4, the first feed line 104-1 and the second feed line 104-2 may be spaced apart from each other. For example, each of the first feeding line 104-1 and the second feeding line 104-2 may have a straight shape. As shown in FIG. 5, the first feed line 104-1 and the second feed line 104-2 may be U-shaped to be adjacent to each other. The first feeding line 104-1 and the second feeding line 104-2 are disposed between the first feeding line 104-1 and the second feeding line 104-2 and the ground plane 102 Energy can be supplied to the radiator 108 through the first feed point 104a and the second feed point 104b, respectively. As can be seen from the following Table 1, when a plurality of feeding lines 104-1 and 104-2 are used, compared with the case of using one feeding line, the frequency band of 1.575 GHz) and the WiFi (Wifi) frequency band (2,45 GHz) is close to 0 dB. That is, it is possible to implement an antenna 100 that transmits and receives multi-band signals through a plurality of feed lines 104-1 and 104-2.

GPS Wifi 1.575 GHz 2.45GHz 5.6 GHz 1 feed line
(one feed rod) -4dB -4.35dB -3.74dB 2 feed lines
(two feed rod) -2dB -3dB -6dB 2 feed lines
lt; / RTI >
- U shape) -0.89dB -1.87dB -5.65dB

6 is a view showing a feeder 104 according to a third embodiment of the present invention. As shown in Table 1, when using two feed lines 104-1 and 104-2, the return losses at the 1.575GHz and 2.45GHz bands are -0.89dB and -1.87dB respectively and are very close to 0 The reflection loss in the 5.6 GHz band is -5.65 dB, and the performance of the antenna 100 in the 5.6 GHz band is lowered. This is due to an interference phenomenon between signals of different frequency bands transmitted and received by the two feed lines 104-1 and 104-2. Accordingly, the embodiments of the present invention can adjust the line width w a of the first feeding line 104 - 1 and the line width w b , w c of the second feeding line 104 - The interference between the signals is minimized.

As shown in FIG. 6, the line width w a of the first feed line 104 - 1 and the line widths w b and w c of the second feed line 104 - 2 may be different from each other. For example, the line width w a of the first feed line 104 - 1 may be 3 mm and the line widths w b and w c of the second feed line 104 - 2 may be 1 mm and 2 mm, respectively . When the line widths of the first feeding line 104-1 and the second feeding line 104-2 are different from each other, the first feeding line 104-1 and the second feeding line 104-2 The frequency passing characteristics of the antenna are different. For example, a signal in the frequency band of 1.5 GHz to 1.6 GHz is smoothly transmitted and received through the first feed line 104 - 1, while a loss of the second feed line 104 - do. In addition, for example, a signal in the frequency band of 5.2 GHz to 5.8 GHz is smoothly transmitted and received through the second feed line 104-2, whereas the loss in the first feed line 104-1 is severe . That is, the first feeding line 104-1 and the second feeding line 104-2 having different linewidths serve as a bandpass filter. According to the embodiments of the present invention, it is possible to transmit and receive signals of different frequency bands by using a plurality of feed lines 104-1 and 104-2 and to transmit / receive signals of a plurality of feed lines 104-1 and 104-2 By varying the linewidth, interference between signals of different frequency bands can be minimized. 6, the second feed line 104-2 may be formed to have a plurality of line widths w b and w c . The first feed line 104 - 1 and the second feed line 104 - The line width of the line 104-2 can be adjusted in various ways.

7 is a view showing a slit formed on the ground plane 102 according to the embodiments of the present invention. As described above, in the embodiments of the present invention, by varying the linewidths of the plurality of feed lines 104-1 and 104-2, it is possible to minimize interference between signals of different frequency bands. In addition, as shown in FIG. 7, the embodiments of the present invention can maximize the minimization of the interference phenomenon by forming the slit 102-1 on one side of the ground plane. This is particularly helpful in securing the isolation of signals in the frequency bands of 5.2 GHz to 5.8 GHz, which are relatively high in transmission and reception loss. 7 shows that the slit 102-1 is formed in one side of the ground plane 102 adjacent to the feeding points 104a and 104b. However, this is merely an example, The shape is not limited thereto. The slit 102-1 can be formed in various shapes such as a straight shape, a U shape, and the like. Further, the position where the slit 102-1 is formed is not limited to that shown in Fig. In FIG. 7, the slit 102-1 is shown extending from the feeding points 108a and 108b to the second feeding line 104-2. However, this is merely an example, and the slits 102-1 May be formed at various locations on the ground plane 102. [

FIG. 8 is a graph showing changes in the parameters S11 and S22 in the antenna 100 shown in FIG. As shown in FIG. 8, the reflection loss in the frequency band of 1.56 GHz is -15.51 dB and the reflection loss in the frequency bands of 2.29 GHz and 5.76 GHz are respectively -6.32dB and -19.02dB, respectively. That is, it can be confirmed that the antenna 100 according to the embodiments of the present invention has a resonant frequency in the GPS frequency band and the Wifi frequency band. Here, the S11 parameter may be an S parameter for the first feed line 104-1, and the S22 parameter may be an S parameter for the second feed line 104-2. That is, the first feeding line 104-1 and the second feeding line 104-2 having different linewidths serve as band-pass filters. According to the embodiments of the present invention, it is possible to realize a multi-band antenna 100 having a better performance than a general planar inverted-F antenna (PIFA). In addition, since the antenna 100 according to the embodiments of the present invention uses only one radiator 108, it is possible to reduce the manufacturing cost of the antenna 100 and reduce the overall size of the antenna 100 And the degree of freedom of component mounting inside the antenna 100 can be increased. Furthermore, since a coupling method is used, a separate contact terminal such as a separate c-clip or the like is unnecessary.

FIG. 9 is a diagram showing a change in the S21 parameter in the antenna 100 shown in FIG. As described above, when two feed lines 104-1 and 104-2 are used, there is a risk of interference between signals transmitted and received by the feed lines 104-1 and 104-2. However, as shown in Fig. 9, the reflection losses at the GFPS (1.5 GHz to 1.6 GHz) and Wi-Fi frequency bands (2.2 GHz to 2.5 GHz and 5.2 GHz to 5.8 GHz) are about -11.22 dB, -11.87 dB and -5.68 dB, and it can be seen that the antenna 100 smoothly transmits and receives in these frequency bands. That is, according to the embodiments of the present invention, the line widths of the first feed line 104-1 and the second feed line 104-2 are formed differently, and the slit 102-1 is formed on one side of the ground plane 102, The interference phenomenon between the signals of different frequency bands transmitted and received by the antenna 100 can be minimized (securing the isolation).

10 is a view showing a radiation pattern in the frequency band of 1.585 GHz in the antenna 100 shown in Fig. 10 (a) shows a pattern in which the radiation occurs in the frequency band of 1.585 GHz through the first feeding line 104-1, and FIG. 9 (b) shows a pattern in which the radiation occurs in the frequency band of 1.585 GHz Fig. 5 is a diagram showing a pattern in which radiation occurs in a frequency band. Fig. 10, the radiator 108 fed through the first feed line 104-1 exhibits a reflection loss of about -8.11 dB in the frequency band of 1.585 GHz, whereas the second feed line 104-2 has a reflection loss of about- It was confirmed that a return loss of about -1.00 dB was exhibited in the frequency band of 1.585 GHz. As described above, the line widths of the first feed line 104-1 and the second feed line 104-2 are different from each other. Here, the 1.585GHz frequency band pass characteristic in the first feed line 104-1 .

11 is a view showing a radiation pattern in the frequency band of 2.295 GHz in the antenna 100 shown in Fig. 11A shows a pattern in which a radiation occurs in a frequency band of 2.295 GHz through a first feeding line 104-1 and FIG. 10B shows a pattern in which a radiation is generated in a frequency band of 2.295 GHz through a second feeding line 104-2. Fig. 5 is a diagram showing a pattern in which radiation occurs in a frequency band. Fig. 11, the radiator 108 fed through the first feed line 104-1 exhibits a reflection loss of about -1.60 dB in the 2.295 GHz frequency band, while the second feed line 104-2 has a reflection loss of about -1.60 dB, It was confirmed that a return loss of about -7.62 dB was exhibited in the 2.295 GHz frequency band. As described above, the linewidths of the first feeding line 104-1 and the second feeding line 104-2 are different from each other. Here, the 2.295 GHz frequency band pass characteristic in the second feeding line 104-1 .

12 is a view showing a radiation pattern in the frequency band of 5.7 GHz in the antenna 100 shown in Fig. FIG. 12A shows a pattern in which the radiation occurs in the frequency band of 5.7 GHz through the first feeding line 104-1, and FIG. 11B shows a pattern in which the radiation occurs in the frequency band of 5.7 GHz through the second feeding line 104-2. Fig. 5 is a diagram showing a pattern in which radiation occurs in a frequency band. Fig. 12, the radiator 108 fed through the first feed line 104-1 exhibits a reflection loss of about -1.79 dB in the 5.7 GHz frequency band, while the second feed line 104-2 has a reflection loss of about -1.79 dB, It was confirmed that a return loss of about -6.49 dB was exhibited in the frequency band of 5.7 GHz. As described above, the line widths of the first feed line 104-1 and the second feed line 104-2 are different from each other. Here, the line width of the 5.7GHz frequency band pass characteristic in the second feed line 104-1 .

10 to 12, the first feeding line 104-1 and the second feeding line 104-2 having different linewidths serve as a bandpass filter. That is, it is possible to smoothly transmit and receive signals in the GFPS frequency band (1.5 GHz to 1.6 GHz) through the first feeding line 104-1 and to transmit and receive signals in the WiFi frequency band (2.4 GHz To 2.5 GHz and 5.2 GHz to 5.8 GHz) can be smoothly transmitted and received. According to the embodiments of the present invention, by varying the linewidths of the plurality of feed lines 104-1 and 104-2, it is possible to minimize interference between signals of different frequency bands.

Figs. 13 to 15 are graphs showing the S11 parameter, the S22 parameter change, and the S21 parameter change, respectively, according to the size change of the ground plane 102 in the antenna 100 shown in Fig. As described above, the ground plane 102 may have a rectangular shape, for example. Here, it is assumed that the horizontal and vertical lengths of the ground plane 102 are increased or decreased, respectively, for example, within 10 mm. Referring to FIG. 13, when the size of the ground plane 102 is changed, the return loss is about -20 dB in the frequency band of 1.5 GHz to 1.6 GHz. 14, when the size of the ground plane 102 is changed, the reflection loss in the frequency bands of 2.2 GHz to 2.5 GHz and 5.2 GHz to 5.8 GHz is about -6 dB and -23 dB, respectively, And there is no significant difference between the two. 15, when the size of the ground plane 102 is changed, the reflection in the Z-fissure frequency band (1.5 GHz to 1.6 GHz) and the Wi-Fi frequency band (2.2 GHz to 2.5 GHz and 5.2 GHz to 5.8 GHz) The loss is almost similar to that in FIG. 9, and the isolation between signals of different frequency bands is still secured. That is, the antenna 100 according to the embodiments of the present invention is not greatly affected by the size change of the ground plane 100, and accordingly, the size of the antenna 100 can be flexibly adjusted.

16 is a view showing a feeder 104 according to a fourth embodiment of the present invention. As shown in FIG. 16, the first feed line 104-1 and the second feed line 104-2 may have different linewidths and lengths. For example, the line width of the first feed line 104-1 is set to be larger than the line width of the second feed line 104-2, and the length of the first feed line 104-1 is set to be longer than the line width of the second feed line 104-2, respectively. At this time, the first feeding line 104-1 and the second feeding line 104-2 may be spaced apart from each other. Thus, by adjusting the line widths and lengths of the feed lines 104-1 and 104-2, the gain of the antenna 100 in various frequency bands can be improved. Hereinafter, an effect of improving the gain of the antenna 100 when the feeder 104 according to the fourth embodiment of the present invention is applied to the antenna 100 will be described with reference to FIG. 17 to FIG.

17 is a view showing an antenna 100 to which a feeder 104 according to a third embodiment of the present invention is applied. In the antenna 100 according to the frequency in the first feed line 104-1 and the second feed line 104-2, And Fig. 18 and 19 are views showing the antenna 100 to which the feeder 104 according to the fourth embodiment of the present invention is applied. In the antenna 100, the first feed line 104-1 and the second feed line 104-2, And the gain of the antenna 100 according to the frequency of the antenna.

17A is a graph showing the gain of the antenna 100 according to the frequency of the first feed line 104-1 when the feeder 104 according to the third embodiment of the present invention is applied to the antenna 100. FIG. And FIG. 17B shows the gain of the antenna 100 according to the frequency of the second feed line 104-2. 18 (c) shows an antenna 100 (100) according to the frequency of the first feeding line 104-1 when the feeder 104 according to the fourth embodiment of the present invention is applied to the antenna 100. [ And FIG. 19D shows the gain of the antenna 100 according to the frequency of the second feed line 104-2.

17A to 18C, when the feeder 104 according to the fourth embodiment is applied to the antenna 100, the antenna 100 in the frequency band of 1.5 GHz to 1.6 GHz, It can be confirmed that the gain is improved. For example, when the feeder 104 according to the third embodiment is applied to the antenna 100, the antenna gain at 1.565 GHz is -5.708 dB, and the feeder 104 according to the fourth embodiment When applied to the antenna 100, the antenna gain at 1.565 GHz was -4.25 dB. That is, when the feeder 104 according to the fourth embodiment is applied to the antenna 100, the transmission / reception efficiency of the antenna 100 in the GPS frequency band is improved.

17 (b) and Fig. 19 (d), when the feeder 104 according to the fourth embodiment is applied to the antenna 100, the frequency of 2.2 GHz to 2.5 GHz and the frequency of 5.2 GHz to 5.8 It can be seen that the antenna gain in the frequency band of GHz is improved. For example, when the feeder 104 according to the third embodiment is applied to the antenna 100, the antenna gain at 2.420 GHz is -5.716 dB, and the feeder 104 according to the fourth embodiment When applied to the antenna 100, the antenna gain at 1.565 GHz was -4.55 dB. That is, when the feeder 104 according to the fourth embodiment is applied to the antenna 100, the transmission / reception efficiency of the antenna 100 in the Wifi frequency band is improved. A section where the antenna gain is lowered in a section of the 5 GHz band is found, but this section is not a big problem because the gain can be sufficiently compensated through the slit 102-1 of the ground plane 102 described above. According to the embodiments of the present invention, by adjusting the line width and length of the plurality of feed lines 104-1 and 104-2, it is possible to minimize the interference phenomenon between signals of different frequency bands, Can be increased.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, I will understand. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by equivalents to the appended claims, as well as the appended claims.

100: Antenna
102: ground plane
102-1, 108-1, 108-2, and 108-3: slits
104: Feeding part
104-1: first feed line
104-2: second feed line
104a, 104b: feed point
106: Dielectric
108: emitter

Claims (7)

In the antenna,
A radiator in which at least one slit is formed;
A power feeder spaced apart from the radiator by a predetermined distance and coupling the radiator to the radiator; And
And a ground plane adjacent to the feeding portion,
Wherein the power feeding section includes a plurality of feeding points and a plurality of feeding lines extending from each of the plurality of feeding points,
Wherein line widths of the plurality of feed lines are different from each other so that signals of a plurality of frequency bands can be transmitted and received, respectively.
delete The method according to claim 1,
Wherein the power feeder includes a first feed line and a second feed line, wherein the first feed line and the second feed line are spaced apart from each other.
The method of claim 3,
Wherein the first feeding line and the second feeding line are formed in a straight line shape.
The method according to claim 1,
Wherein the power feeder includes a first feed line and a second feed line, and the first feed line and the second feed line are connected to each other.
The method of claim 5,
Wherein the first feed line and the second feed line are adjacent to each other to form a U-shape.
The method according to claim 1,
Wherein a slit is formed on one side of the ground plane so that signals of a plurality of frequency bands can be transmitted and received, respectively.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070054989A (en) * 2005-11-24 2007-05-30 엘지전자 주식회사 Broadband antenna and electronic equipment comprising it
KR20100015119A (en) * 2008-08-04 2010-02-12 한국전자통신연구원 Near-field radio frequency identification reader antenna

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070054989A (en) * 2005-11-24 2007-05-30 엘지전자 주식회사 Broadband antenna and electronic equipment comprising it
KR20100015119A (en) * 2008-08-04 2010-02-12 한국전자통신연구원 Near-field radio frequency identification reader antenna

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