KR20170010568A - Mobile terminal - Google Patents

Mobile terminal Download PDF

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Publication number
KR20170010568A
KR20170010568A KR1020150102349A KR20150102349A KR20170010568A KR 20170010568 A KR20170010568 A KR 20170010568A KR 1020150102349 A KR1020150102349 A KR 1020150102349A KR 20150102349 A KR20150102349 A KR 20150102349A KR 20170010568 A KR20170010568 A KR 20170010568A
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KR
South Korea
Prior art keywords
radiation
band
region
antenna
conductive
Prior art date
Application number
KR1020150102349A
Other languages
Korean (ko)
Inventor
정준영
이주희
이원우
손명수
박상조
Original Assignee
엘지전자 주식회사
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 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020150102349A priority Critical patent/KR20170010568A/en
Publication of KR20170010568A publication Critical patent/KR20170010568A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0428—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave
    • H01Q9/0435—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave using two feed points
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

(MIMO) antenna in a mobile terminal, it is an object of the present invention to minimize a space and maximize a radiation efficiency. According to an aspect of the present invention, there is provided an antenna device including a ground plane for grounding an antenna, a radiation band for forming a part of a radiation pattern of the antenna, a first end connected to a first point of the radiation band, A first conductive part which is branched from the first radiation part of the radiation band, and a second conductive part which is branched from the second radiation part of the radiation band, wherein the radiation band is divided into a first radiation part and a second radiation part, A first feeding part connected to the first conducting part and a second feeding part connected to the second conducting part, the first feeding part receiving power and being connected to the second conducting part; The present invention provides a mobile terminal including the mobile terminal.

Description

[0001] MOBILE TERMINAL [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a mobile terminal having a multiple input / output (MIMO) antenna pattern.

The antenna serves to transmit or receive a radio signal. Antenna does not receive signals coming in all directions with equal performance, but reception performance depends on direction and angle of signal. Among them, antennas transmitting and receiving short wavelengths can be roughly divided into 'dipole antenna' and 'loop antenna'. Most of the antennas are modified in these two types of antennas.

Particularly, in order to realize such an antenna in a mobile terminal, a certain length or space is required to obtain an antenna effect despite a small volume.

A representative example of the antenna pattern included in such a mobile terminal is PIFA (Planar Inverted F Antenna). Planar Inverted F Antenna (PIFA) refers to a planar antenna with a patch plate of a smaller area placed on the ground plane of the plate. A feed line and a shorting pin are provided between the ground plane and the patch so that the F-shape is inverted. At this time, the patch is resonated with the ground plane due to the current feed by the feeder line, and acts as a radiation element. Depending on the patch height, width, length, position of the feeder line and position of the shorting pin, Frequency and the like are determined. Since the PIFA has no protruding portion, it is easy to be embedded in a mobile terminal or the like.

The PIFA functions as a directional antenna, and thus may be provided in various directions for improving the directivity, or may be provided in a superimposed manner to implement a plurality of frequency bands.

An MIMO (Multi Input Multiple Output) antenna is an antenna system capable of multiple inputs and outputs. It transmits data through multiple paths by increasing the number of antennas of the mobile terminal to two or more. It is a technology that can reduce interference and reduce the transmission rate of each.

Such an MIMO antenna should also be formed within the space constraint of the mobile terminal.

Therefore, the provision of the PIFA in a superposed manner requires a more efficient layout of the antenna pattern due to the restriction of the space.

SUMMARY OF THE INVENTION The present invention aims at minimizing space and maximizing radiation efficiency in implementing a multi-input / output (MIMO) antenna in a mobile terminal as described above.

According to an aspect of the present invention, there is provided a wireless communication system including a ground plane for grounding an antenna, a radiation band for forming a part of a radiation pattern of the antenna, one end connected to a first point of the radiation band, A first grounding part and a second radiation part, and the other end is connected to the ground plane; a first conductive part branched from the first radiation part of the radiation band; A first power feeder connected to the first power feeder and a second power feeder connected to the second power feeder, the second power feeder being connected to the second power feeder, And a mobile terminal including the mobile terminal.

According to another aspect of the present invention, there is provided a mobile terminal, wherein the second conductive part includes a '' shape or a 'C' shape.

According to another aspect of the present invention, there is also provided an antenna device, further comprising an extended radiating portion extending from one end of the radiating band in the second radiating direction, and the second conductive portion includes a first region disposed in parallel with the extended radiating portion And a mobile terminal.

According to another aspect of the present invention, there is provided a mobile terminal, wherein the second conductive portion further includes a second region bent at least one of both ends of the first region.

According to another aspect of the present invention, the second region is disposed in parallel with the second radiation portion so as to be biased toward the second radiation portion of the radiation band at both ends of the first region. Lt; / RTI >

According to another aspect of the present invention, there is provided a mobile terminal, wherein the second region is connected to the power supply unit while being biased to a far side from a second radiation unit of the radiation band, at both ends of the first region.

According to another aspect of the present invention, there is provided a mobile terminal, wherein the second conductive portion includes a first region parallel to the ground strap.

According to another aspect of the present invention, there is provided a mobile terminal further comprising an additional ground point connected to a ground surface of the first radiation part or the second radiation part of the radiation band.

According to another aspect of the present invention, there is provided a mobile terminal, comprising a variable part connected to the first conductive part or the second conductive part to change a radiation frequency band.

According to another aspect of the present invention, there is provided a mobile terminal, comprising: a variable section connected to the ground band for changing a radiation frequency band.

The effect of the mobile terminal according to the present invention will be described below.

According to at least one of the embodiments of the present invention, it is possible to mount a MIMO antenna in a small space of a mobile terminal.

In addition, according to at least one embodiment of the present invention, a multi-input / output (MIMO) antenna is mounted on a mobile terminal, and the radiation gain is advantageous over other antenna patterns.

FIG. 1 illustrates an antenna pattern of a mobile terminal according to an embodiment of the present invention. Referring to FIG.
FIG. 2 illustrates another embodiment of an antenna pattern included in a mobile terminal according to the present invention. Referring to FIG.
FIG. 3 illustrates another embodiment of an antenna pattern included in a mobile terminal according to the present invention.
FIGS. 4, 6, and 8 are experimental analysis results of the antenna pattern of FIG. 2 among the combination of the PIFA pattern and the coupling antenna pattern of the present invention.
FIGS. 5, 7, and 9 show the results of an experimental analysis using a combination of two PIFA patterns.
FIG. 10 illustrates another embodiment of an antenna pattern included in a mobile terminal according to the present invention.
11 illustrates an antenna pattern of a mobile terminal according to an embodiment of the present invention.
12 and 13 illustrate an antenna pattern of a mobile terminal according to an embodiment of the present invention.

FIG. 1 illustrates an antenna pattern of a mobile terminal according to an embodiment of the present invention. Referring to FIG.

A ground plane that serves as a ground in the antenna effect can be included. When a mobile terminal is used in a mobile terminal, a PCB for mounting components of the mobile terminal can serve as a ground plane. However, the PCB does not necessarily serve as a ground plane, and a circuit configuration or a separate member may be provided if necessary.

The radiation band (110) is a metal material that is involved in the radiation pattern and bandwidth in the antenna pattern. Radiation band 110 may form part of the radiation pattern of the antenna. In other words, the radiation strip 110 can be combined with other conductive materials to form all of the radiation pattern. In other words, the rear case may be provided at the back side of the PCB to be coupled to each other, and the radiation band 110 and other conductive materials may be coated on the rear side of the rear case.

The radiating band (s) 110 may have a length in the range of a specific range corresponding to the range of the intended bandwidth. The radiating band 110 refers to a pattern portion of a metallic material mainly provided in a straight line, but is not necessarily limited to a straight line, and may include a bent or bent region like an extending radiating portion described later.

The grounding band 220 may be connected to the first point 101 of the radiation band 110 to divide the radiation band into a first radiation portion and a second radiation portion with respect to the first point. One end of the ground band 220 may be connected to the first point 101 and the other end may be connected to the ground plane. The other end of the ground strap 220 may include a clip for connection with the ground plane.

The first conductive part 210 may be branched from the first radiation part 111 of the radiation band 110.

The first feed portion may receive power and be connected to the first conductive portion. One end of the first feeder 211 may serve as a passage through which current is supplied. One end of the first power feeder 211 may be provided in a clip shape. The other end of the first feeder 211 is connected to the end of the first conductor 210 to supply the supplied current to the first conductor 210.

The region including the second radiation 112 of the radiation band 110, the grounding band 220 and the second conductive portion 230 to be described later is formed in the region of the loop A MIMO antenna can be realized by performing a role of a coupling antenna having a current distribution.

The PIFA pattern and the coupling antenna pattern 620 may implement independent frequency regions in the same frequency region or different frequency regions. Each frequency domain is possible by adjusting the length value of each antenna pattern.

The second conductive part 230 may be spaced apart from the second radiation part 112 and the grounding band 220. In particular, the second conductive part 230 may be provided in a region between the second radiation part 112 and the grounding band 220. May refer to a rectangular or parallelogram space formed by the second radiation part 112 and the grounding band 220. Or broadly speaking, a space of an acute angle range formed by the second radiation portion 112 and the grounding band 220. [

The second radiation part 112, the grounding band 220, and the second conductive part 230 of the radiation band 110 may have a loop-shaped radiation pattern.

The radiation pattern of the loop shape refers to the overall tendency of the radiation pattern of the antenna and the radiation pattern of the second radiation part 112, the grounding band 220 and the second conductive part 230 are physically connected Things are not what you need.

The loop-shaped radiation pattern is generated by inducing a coupling antenna effect through a space between the second conductive part 230 and the second radiation part 112 or the grounding band 220, respectively. Accordingly, the second conductive part 230 may be spaced apart from the second radiating part 112 by a specific distance, and may be spaced apart from the grounding band 220 by a specific distance.

The shape of the second conductive portion 230 is not limited, but the total length of the second conductive portion 230 may be limited to a specific range in order to obtain a basic desired frequency region.

The second conductive part 230 may include a shape that can shape the shape of the closed loop together with the grounding band 220 and the second radiation part 112 to improve the gain performance. For example, the second conductive part 230 may have a shape of 'A' and one point may be bent. Or may be provided in the shape of a " C "

Although the shape of the second conductive part 230 is not limited to 'a' or 'c' as mentioned above, it is assumed that the shape of the second conductive part 230 is 'a' for convenience of explanation, .

The second feeding part 231 may be connected to the second conductive part 230 by receiving power. One end of the second feeding part 231 may serve as a passage through which current is supplied. One end of the second feeding part 231 may be provided in a clip shape. The other end of the second feeding part 231 is connected to the end of the second conductive part 230 and can supply the supplied current to the second conductive part 230.

FIG. 2 illustrates another embodiment of an antenna pattern included in a mobile terminal according to the present invention. Referring to FIG.

The first region 233 parallel to the ground strap 220 and the second region 233 parallel to the radiation strip 110 are formed on the basis of the folded points, (234).

The first region 233 may be provided in parallel with the ground strap 220. That is, the first region 233 of the second conductive portion 230 and the grounding band 220 may have a region adjacent to and in parallel with the first region 233, thereby generating a coupling antenna effect.

The second region 234 together with the first region 233 serves to regulate a length for determining a desired bandwidth and to be a current receiving path. The current supplied form may be provided in the form of a clip.

The first region 233 may generate a coupling effect with the second radiation portion 112 of the radiation band 110 and the second region 234 may generate a coupling effect with the ground band 220 .

FIG. 3 illustrates another embodiment of an antenna pattern included in a mobile terminal according to the present invention.

The first region 233 of the second conductive portion 230 may be provided in parallel with the grounding band 220. That is, the first region 233 of the second conductive portion 230 and the grounding band 220 may have a region adjacent to and in parallel with the first region 233, thereby generating a coupling antenna effect.

The second region 234 of the second conductive portion 230 may be disposed in parallel with the second radiation portion 112 so as to be located closer to the second radiation portion 112 of the radiation band 110. [

The second region 234 of the second conductive portion 230 is disposed in parallel to the second radiation portion 112 of the radiation band 110 so as to be parallel to the second region 234 of the second conductive portion 230, And the second radiation part 112 of the radiation strip 110 can also produce a coupling effect.

One end of the first region 233 may be connected to the second feeding portion 231. Referring to FIG. 1 again, the first region 233 and the second region 234 may be provided farther from the grounding band 220 and the second radiation portion 112, respectively.

The radiating band 110 may further include an extended radiating part 240 extending from one end of the second radiating part 112 for coupling effect of the first area 233. The extended radiation part 240 may be formed in a shape bent in the second radiation part 112 and may be provided in parallel with the first area 233 of the second conductive part 230. The first region 233 can generate a coupling effect with the grounding band 220. [

A second feeding part 231 may be connected to one end of the second area 234.

The second region 234 of the second conductive portion 230 and the first region 233 of the second conductive portion 230 are electrically connected to the grounding band 220, the second radiation portion 112 of the radiation band 110, The whole may have a radiation pattern of a loop tendency.

In the case where the first region 233 of the second conductive portion 230 is parallel to the extended radiation portion 240, the current distribution due to the coupling effect may be as far as possible from the PIFA effect generating region, Effect and the canceling interference of the coupling antenna effect can be minimized. That is, the isolation effect can be maximized.

In addition, the flow direction of the current by the PIFA pattern 610 and the flow direction of the current by the coupling antenna pattern 620 are different, and the gain can be increased.

Figs. 4 to 9 show the results of a comparison experiment between an antenna pattern combining a PIFA coupling antenna and two PIFA.

FIGS. 4, 6, and 8 are experimental analysis results of the antenna pattern 620 of FIG. 2 among the combination of the PIFA pattern 610 and the coupling antenna pattern of the present invention, FIGS. 5, 7, And PIFA patterns 710 and 720. FIG.

Independent variables are assumed to have been tested in the frequency range of 3.5 GHz and EVB conditions.

FIG. 6 illustrates a current distribution when the PIFA pattern 610 and the coupling antenna pattern 620 are combined as shown in FIG. 6 (a) shows the current distribution by the PIFA pattern 610, and Fig. 6 (b) shows the current distribution by the coupling antenna pattern 620. Fig. The larger the size of the arrow, the greater the intensity of the current, i.e. the intensity of the radiation. The current distribution due to the PIFA region is mainly directed in the upward direction and the current distribution due to the coupling antenna region is formed mainly in the downward direction, thereby minimizing the gain due to each pattern.

FIG. 8 shows isolation values when the PIFA pattern 610 and the coupling antenna pattern 620 are combined as shown in FIG. The isolation value due to the PIFA pattern 610 and the coupling antenna pattern 620 becomes -30 dB.

FIG. 7 shows a current distribution when two PIFA patterns 710 and 720 are vertically arranged as shown in FIG. 7 (a) shows the current distribution by the PIFA pattern 710, and FIG. 7 (b) shows the current distribution by the PIFA pattern 720 below. When the two PIFA patterns 710 and 720 are arranged vertically, unlike the arrangement of the PIFA pattern 610 and the coupling antenna 620 in FIG. 4, more space is occupied.

FIG. 9 shows isolation values when two PIFA patterns 710 and 720 are vertically arranged as shown in FIG. The isolation value due to the two PIFA patterns 710 and 720 is -11 dB, which is higher than the isolation value of -30 dB due to the combination of the PIFA pattern 610 and the coupling antenna pattern 620, .

FIG. 10 illustrates another embodiment of an antenna pattern included in a mobile terminal according to the present invention.

The first region 233 may be disposed parallel to the extended radiation portion 240 and the second region 234 may be disposed parallel to the second radiation portion 112. In this case, the first region 233 of the second conductive portion 230 generates a coupling effect with the extended radiation portion 240, and the second region 234 of the second conductive portion 230 generates a coupling effect with the second radiation portion 240. [ The coupling effect with coupling portion 112 can be generated.

11 illustrates an antenna pattern of a mobile terminal according to an embodiment of the present invention.

The additional ground point 250 may be connected to one point of the first radiation part 111 or the second radiation part 112 of the radiation band 110 and connected to the ground plane. In the case where the additional ground point 250 is provided in the first radiation part 111 of the radiation band 110, the additional ground point serves as a ground for the radiation pattern of the PIFA. In the case where the additional ground point 250 is provided in the second radiation part 112 The additional ground point 250 serves as a ground for the coupling antenna pattern, and as a result, the PIFA and the coupling antenna region can be independently secured.

On the other hand, the additional ground point 250 may serve as a ground and may replace the role of the power feeder. The mobile terminal may require an open area for radiation. However, it may be difficult to secure the open area due to miniaturization of the mobile terminal or an increase in the number of mounted components. If it is difficult to secure an open area, the additional ground point 250 may be used as a power supply.

12 and 13 illustrate an antenna pattern of a mobile terminal according to an embodiment of the present invention.

Referring to FIG. 12, the variable portion 260 may be connected to the first conductive portion 210 or the second conductive portion 230. The variable portion 260 may include a capacitor or an inductor. When the variable portion 260 is connected to the first conductive portion 210 or the second conductive portion 230, the bandwidth can be changed. The frequency band by the PIFA pattern and the frequency band by the coupling antenna pattern may be adjusted differently through the variable portion 260. [

Referring to FIG. 13, the variable portion 260 may be connected to the ground strap 220. When the variable portion 260 is connected to the grounding band 220, the bandwidth can be similarly changed. The frequency band by the PIFA pattern and the frequency by the coupling antenna pattern can be adjusted through the variable portion 260.

However, in the embodiment of FIG. 12, the frequency band of the PIFA pattern and the frequency band of the coupling antenna pattern can be independently varied, whereas in the embodiment of FIG. 13, the frequency band of the PIFA pattern and the coupling antenna pattern The frequency bands can be varied independently of each other.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

100: antenna pattern 101: first point
110: radiation band 111: first radiation part
112: second radiation part 210: first conductive part
211: first-class power unit 220: grounding band
230: second conductive portion 231: second power supply portion
233: first region 234: second region
240: extension radiator 250: additional ground point
260: variable portion 610: PIFA antenna pattern
620: Coupling antenna pattern 710: PIFA antenna pattern
720: PIFA antenna pattern

Claims (10)

A ground plane for grounding the antenna;
A radiation band forming a part of the radiation pattern of the antenna;
A grounding band connected to a first point of the radiation band at one end, the radiation band being divided into a first radiation portion and a second radiation portion with respect to the first point, and the other end connected to the ground plane;
A first conductive portion which is branched at a first radiation portion of the radiation band;
A second conductive part spaced apart from the second radiating part and the grounding band of the radiating band;
A first power feeder connected to the first conductive part to receive power; And
And a second power feeder connected to the second conductive part with power supplied thereto. The method according to claim 1,
Wherein the second conductive portion comprises:
A 'shape or a' c 'shape. The method according to claim 1,
Further comprising an extended radiating portion extending from one end of the radiating band in the direction of the second radiating portion,
And the second conductive portion includes a first region disposed in parallel with the extended radiation portion. The method of claim 3,
Wherein the second conductive portion comprises:
And a second region bent at least one of both ends of the first region. The method of claim 3,
Wherein the second conductive portion comprises:
And a second region bent at least one of both ends of the first region. 5. The method of claim 4,
Wherein the second region is disposed at both ends of the first region so as to be parallel to the second radiation portion and is connected to the second power feeding portion while being positioned away from the second radiation portion of the radiation band. The method according to claim 1,
And the second conductive portion includes a first region parallel to the ground strap. The method according to claim 1,
Further comprising an additional grounding point connected to one side of the first radiation portion or the second radiation portion of the radiation band and connected to the ground plane. The method according to claim 1,
And a variable portion connected to the first conductive portion or the second conductive portion to change a radiation frequency band. The method according to claim 1,
And a variable portion connected to the ground band to change a radiation frequency band.
KR1020150102349A 2015-07-20 2015-07-20 Mobile terminal KR20170010568A (en)

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