KR101970861B1 - Antenna device - Google Patents
Antenna device Download PDFInfo
- Publication number
- KR101970861B1 KR101970861B1 KR1020157019503A KR20157019503A KR101970861B1 KR 101970861 B1 KR101970861 B1 KR 101970861B1 KR 1020157019503 A KR1020157019503 A KR 1020157019503A KR 20157019503 A KR20157019503 A KR 20157019503A KR 101970861 B1 KR101970861 B1 KR 101970861B1
- Authority
- KR
- South Korea
- Prior art keywords
- antenna
- auxiliary antenna
- extending portion
- extending
- auxiliary
- Prior art date
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Classifications
-
- 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
- H01Q21/00—Antenna arrays or systems
- H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
-
- 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
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
- H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
- H01Q5/364—Creating multiple current paths
- H01Q5/371—Branching current paths
-
- 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
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Details Of Aerials (AREA)
Abstract
Provided is an antenna device capable of flexibly adjusting each resonance frequency obtained by double resonance and being capable of downsizing and thinning. (GND), a first element (3), and a second element (4) patterned in a metal foil on a substrate main body (2) And the antenna element AT of the dielectric antenna is connected in the middle and the first auxiliary antenna portion 6 is connected to the tip end of the antenna element AT and the second element is connected to the feed point FP, , A passive element (P2) is connected in the middle, and a second auxiliary antenna part (7) is connected to the tip end of the first auxiliary antenna part and the second auxiliary antenna part , And is formed of a flexible thin film conductor and is folded back and extended above the substrate main body with an interval therebetween.
Description
The present invention relates to an antenna device capable of multiple resonance.
2. Description of the Related Art Conventionally, an antenna having a radiation electrode and a dielectric block, an antenna using a switch, and a control voltage source has been proposed in order to double-resonate a resonance frequency of an antenna in a communication device. For example, in the prior art using a dielectric block, a composite antenna has been proposed in which a radiation electrode is formed of a resin molding and a dielectric block is integrated with an adhesive to obtain high efficiency.
However, the above-described conventional techniques also have the following problems.
That is, in the technique using the dielectric block described in
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide an antenna device capable of flexibly adjusting resonance frequencies, And it is an object of the present invention to provide a possible antenna device.
The present invention adopts the following constitution to solve the above problems. That is, the antenna device of the first invention comprises: an insulating substrate main body; a ground plane formed on the substrate main body by a metal foil; a first element and a second element; and the first element is arranged on the ground surface side Wherein a feed point is formed and extended at a base end thereof, an antenna element of the dielectric antenna is connected in the middle thereof, and a first auxiliary antenna section is connected to the tip end thereof, and the second element is connected to the base end side of the first element A passive element is connected in the middle and a second auxiliary antenna part is connected to the front end thereof. The first auxiliary antenna part and the second auxiliary antenna part are formed of flexible thin film conductors, And is spaced apart from the substrate main body with an interval therebetween.
In this antenna device, since the first auxiliary antenna portion and the second auxiliary antenna portion are formed of a flexible thin film conductor and are folded back and extended above the substrate main body with an interval therebetween, Resonance can be achieved by effectively utilizing the stray capacitance generated between the second auxiliary antenna portion and the ground surface on the substrate main body, the antenna element of the loading element which does not self resonate at a desired resonance frequency, and each element. In addition, since the first auxiliary antenna portion and the second auxiliary antenna portion are formed of flexible thin film conductors and folded back, the interval between the first and second auxiliary antenna portions and the board main body can be appropriately changed, Even when the gap is changed or when the first and second auxiliary antenna portions are to be bent, it is possible to flexibly cope with the arrangement condition of the casing to be mounted. In particular, flexibility of the first and second auxiliary antenna portions can be sufficiently secured by mounting the antenna elements and the passive elements on the first and second auxiliary antenna portions only on the side of the board body. Also, by selecting the antenna elements and the passive elements, it is possible to flexibly adjust the respective resonance frequencies and impedances, and to obtain an antenna device capable of two resonances according to applications, devices, and design conditions. Further, it is possible to design the first and second auxiliary antenna portions and the elongated shapes of the respective elements in the plane of the substrate main body, so that it is possible to make the antenna thinner than that of the conventional dielectric block or the resin molded body, It is possible to downsize and improve the performance by selecting the antenna element. In addition, the cost due to the mold, the design change, and the like is not required, and low cost can be realized.
The antenna device of the second invention is characterized in that, in the first invention, the first auxiliary antenna portion and the second auxiliary antenna portion are patterned with a metal foil on an insulating film. That is, in this antenna device, since the first auxiliary antenna portion and the second auxiliary antenna portion are patterned in a metallic foil on the insulating film, high flexibility can be obtained and a material having a high dielectric constant can be appropriately selected as a material of the insulating film , The pattern shortening effect of the first and second auxiliary antenna portions can be obtained and it is possible to cope with the case where the desired frequency band is low or further miniaturization is demanded. Further, a general-purpose flexible printed circuit board can be used, and cost reduction can be achieved.
The antenna device according to the third invention is characterized in that, in the first or second invention, the open ends of the first auxiliary antenna portion and the second auxiliary antenna portion are disposed in directions opposite to each other. In other words, in this antenna apparatus, since the open ends of the first auxiliary antenna unit and the second auxiliary antenna unit are disposed in opposite directions to each other, the high impedance parts are mutually opposite to each other, It is possible to effectively use the stray capacitance generated between the stator and the stator.
An antenna device according to a fourth aspect of the present invention is the antenna device according to any one of the first to third aspects, wherein the open end of the first auxiliary antenna part is disposed in a direction opposite to the open end of the antenna element. In other words, in this antenna device, since the open end of the first auxiliary antenna portion is disposed in the reverse direction with respect to the open end of the antenna element, the portions having high impedance are mutually opposite to each other, It is possible to effectively utilize the stray capacitance generated between the stator and the stator.
A fifth aspect of the present invention is the antenna device according to any one of the first to fourth aspects, wherein a spacer is provided between the first auxiliary antenna portion and the second auxiliary antenna portion and the substrate main body . That is, in this antenna apparatus, since the spacers are provided between the first auxiliary antenna unit and the second auxiliary antenna unit and the substrate main body, the spacing between the first and second auxiliary antenna units and the substrate main body Can be kept constant. By using the material of the spacer as the high dielectric material, the pattern shortening effect of the first and second auxiliary antenna portions can be obtained. Further, by adopting an elastic material such as rubber, it is possible to obtain a shock absorbing effect.
The antenna device according to a sixth aspect of the present invention is the antenna device according to any one of the first to fifth aspects, wherein the substrate body is patterned with a metal foil and extends from the base end of the first element, Wherein the first element has a feeding point formed at a base end disposed on the ground surface side and a first extension extending in a direction away from the ground surface, And a second extension extending in a direction along the ground plane from a tip of the first extension, the second element extending from a base end of the first element in a direction away from the first extension A third extending portion, and a second extending portion extending from the leading end of the third extending portion along the first extending portion from the ground surface Wherein the first auxiliary antenna portion has a fifth extending portion extending from the front end of the second extending portion toward the upper side of the substrate main body and a second extending portion extending from the front end of the fifth extending portion toward the second And a sixth extending portion extending along the extending portion, wherein the second auxiliary antenna portion has a seventh extending portion extending from the front end of the fourth extending portion toward the upper side of the substrate main body, and a sixth extending portion extending from the front end of the seventh extending portion toward the sixth And an eighth extending portion extending along the extending portion, the second extending portion extending at an interval to the ground plane so as to generate a stray capacitance with the ground plane, and the antenna element is formed in the middle . That is, in this antenna device, the stray capacitance between the first and fourth extension portions and the stray capacitance between the first and second auxiliary antenna portions (mainly the sixth extension portion) and the seventh extension portion And a stray capacitance between the first auxiliary antenna portion (mainly the sixth extending portion) and the eighth extending portion, a stray capacitance between the first auxiliary antenna portion (mainly the sixth extending portion) and the antenna element, The stray capacitance between the antenna section (mainly the sixth extension section) and the ground plane, the stray capacitance between the antenna element and the ground plane, the stray capacitance between the seventh extending section and the ground plane, It is possible to generate a stray capacitance.
According to the present invention, the following effects are exhibited. That is, according to the antenna apparatus of the present invention, the first auxiliary antenna unit and the second auxiliary antenna unit are formed by flexible thin-film conductors, and are folded back and placed on the upper side of the substrate body on which the respective elements, The resonance frequency can be flexibly adjusted, and two resonance according to the design conditions can be achieved, and miniaturization and high performance can be achieved. Therefore, the antenna device of the present invention can easily perform double-resonance corresponding to various uses and devices, and can save space and improve the degree of freedom of wiring and installation.
1 is a plan view of a main part showing a state (a) in which the first and second auxiliary antenna portions are developed and a state (b) in which the antenna element is folded back in one embodiment of the antenna device according to the present invention.
2 is a side view of a main portion showing an antenna device in the present embodiment.
Fig. 3 is a perspective view (a), a plan view (b), a front view (c), and a bottom view (d) of the antenna element in this embodiment.
4 is a wiring diagram showing the stray capacitance generated in the antenna device in the present embodiment.
5 is a graph showing VSWR characteristics (voltage standing wave ratio) in two resonance in the embodiment of the antenna device related to the present invention.
6 is a graph showing a radiation pattern of 900 MHz band in the embodiment of the antenna apparatus according to the present invention.
7 is a graph showing a radiation pattern of 1800 MHz band in the embodiment of the antenna apparatus according to the present invention.
Fig. 8 is a cross-sectional view of the antenna device according to the embodiment of the present invention. Fig. 8 (a) shows a case where the thickness of the spacer is curved and the case where the spacer has a thickness of 3 mm, (C) is a side view of the main part showing the antenna device when the spacer is vertically arranged and the thickness of the spacer is 6 mm.
Fig. 9 is a graph showing the relationship between the case where the thickness of the spacer is curved and the case where the thickness of the spacer is curved and the thickness of the spacer is 3 mm, Of the first resonance frequency is 6 mm.
Fig. 10 is a side view of a main part when a casing showing an antenna device is broken in another example of the present embodiment. Fig.
Hereinafter, an embodiment of an antenna device according to the present invention will be described with reference to Figs. 1 to 5. Fig.
As shown in Figs. 1 and 2, the
The
The first
The first
The
The
The first
The first and second
The second extending portion E2 is extended at a distance from the ground plane GND so as to generate a stray capacitance between the second extending portion E2 and the ground plane GND and the antenna element AT is formed in the middle have. The
The open ends of the first
The substrate
The feeding point FP is connected to a feeding point of a high-frequency circuit (not shown) through a feeding means such as a coaxial cable. Examples of the power supply means include various structures such as a connector such as a coaxial cable and a receptacle, a connection structure in which contacts have a plate spring shape, a connection structure in which contacts have a pin probe shape or a pin shape, Can be employed. For example, when a coaxial cable is employed as the power feeding means, the ground line of the coaxial cable is connected to the base end side of the ground plane GND and the core wire of the coaxial cable is connected to the feed point FP.
The antenna element (AT) is a loading element which does not self-resonate at a desired resonance frequency. For example, as shown in Fig. 3, a
The
The
Next, the resonance frequency in the
In the
In addition, the final adjustment of the first resonance frequency f1 is flexibly adjustable using the first passive element P1. The final adjustment of the second resonance frequency f2 can be flexibly adjusted by using the second passive element P2.
The impedance at the first resonance frequency f1 is determined by the stray capacitances Ca to Cf. The impedance at the second resonance frequency f2 is determined by the stray capacitances Ca, Cb, Cc, Cg and Ch. Moreover, the final impedance adjustment can be flexibly performed using the third passive element P3 for each resonance frequency.
Therefore, the first resonance frequency f1 is adjusted mainly in the portion surrounded by the broken line A1 in Fig. The second resonance frequency f2 is adjusted mainly in a portion surrounded by the broken line A2 in Fig. As described above, in the antenna operation, not only the stray capacitance between the elements but also the stray capacitance between each element and the ground plane (GND) and the stray capacitance between the first element and the ground plane By using the stray capacitances of the two
As described above, in the
Since the first
By selecting the antenna elements AT and the passive elements P1 to P3, it is possible to flexibly adjust the respective resonance frequencies and impedances to obtain an antenna device capable of two resonance according to applications, devices, and design conditions have. Further, it is possible to design the first and second
In addition, since the first
Alternatively, since the open ends of the first
Since the
Example
Next, in the embodiment in which the antenna device according to the present embodiment was actually fabricated, the results of measurement for the case where the VSWR characteristics (voltage standing wave ratio) and the radiation pattern and the spacer condition in the two resonance frequencies at the respective resonance frequencies are changed Will be described with reference to Figs. 5 to 9. Fig.
Also, in each passive element, an inductor was used for both the first passive element P1: 10 nH, the second passive element P2: 1.5 nH, and the third passive element P3: 10 nH. The thickness of the
As for the measurement of the radiation pattern, the direction toward the ground plane GND as the extending direction of the first extending portion E1 is defined as the X direction, and the direction opposite to the extending direction of the second extending portion E2 is defined as the Y direction And the direction perpendicular to the surface of the substrate
Fig. 6 shows the radiation pattern (YZ plane) at the first resonance frequency f1 in the 900 MHz band, and the average power gain was 0.4 dBi. Fig. 7 shows the radiation pattern (YZ plane) at the second resonance frequency f2 in the 1800 MHz band, and the average power gain was -0.4 dBi.
Next, the results of confirming the influence of the resonance frequency on the arrangement conditions of the first and second auxiliary antenna portions are shown in Figs. 8 and 9. Fig. 8 (a)). In the case where the thickness of the
8 (c)), the
The present invention is not limited to the above-described embodiments and examples, and various modifications may be added within the scope of the present invention.
For example, although the antenna element is formed in the second extension portion in the above embodiment, the antenna element may also be formed in the fourth extension portion. In this case, the length of the second element can be shortened by the antenna element of the fourth extension portion, which is preferable in the case where the occupied area of the antenna is narrow. In addition, the stray capacitance Ca can be increased by adopting the antenna element to the fourth extension portion.
Although it is preferable to form the first and second auxiliary antenna portions using the flexible printed circuit board as in the above embodiment, it may be formed of another flexible conductor thin film. For example, a thin glass epoxy substrate having flexibility may be used, and the first and second auxiliary antenna portions may be patterned with a metal foil such as a copper foil.
In the above embodiment, the flexible printed circuit board on which the first and second auxiliary antenna portions are formed is mounted on the spacer and is provided above the substrate main body. However, as another example, as shown in Fig. 10, The flexible printed circuit board on which the first and second
1: Antenna device
2: substrate body
3: first element
4: second element
5: third element
6: First auxiliary antenna unit
7: Second auxiliary antenna unit
8: Spacer
AT: Antenna element
E1: first extension
E2:
E3: third extension part
E4: fourth extension part
E5: Fifth extension
E6: sixth extension
E7: seventh extension part
E8: Eighth extension part
GND: Ground plane
P1: first passive element
P2: second passive element
P3: Third passive element
FP: feed point
Claims (6)
Wherein the first element has a feeding point formed at a base end disposed on the ground plane side and extended, a first antenna element connected to the antenna element of the dielectric antenna and a first auxiliary antenna section connected to the tip, And a second auxiliary antenna unit connected to the distal end of the first auxiliary antenna unit and the second auxiliary antenna unit, wherein the first auxiliary antenna unit is connected to the base end side of the first element, And is folded back so as to be spaced apart from the substrate main body at an upper portion of the substrate main body.
Wherein the first auxiliary antenna portion and the second auxiliary antenna portion are formed in a patterned metal foil on the insulating film.
Wherein the first auxiliary antenna unit and the second auxiliary antenna unit have open ends disposed in directions opposite to each other.
Wherein an open end of the first auxiliary antenna section is disposed in a direction opposite to an open end of the antenna element.
Wherein a spacer is provided between the first auxiliary antenna portion and the second auxiliary antenna portion and the substrate main body.
And a third element that is patterned with a metal foil on the substrate body and extends from a base end of the first element and is connected to the ground surface at a position where the tip is spaced apart from the feed point, A first extending portion formed at a base end disposed on the ground plane side and extending in a direction away from the ground plane, and a second extending portion extending from the leading end of the first extending portion in a direction along the ground plane Wherein the second element has a third extending portion extending from a base end of the first element in a direction away from the first extending portion and a second extending portion extending from the tip of the third extending portion along the first extending portion, And a fourth extending portion extending in a direction away from the first auxiliary antenna portion, A fifth extending portion extending from the distal end of the second extending portion toward the upper side of the substrate main body and a sixth extending portion extending from the distal end of the fifth extending portion along the second extending portion, A seventh extending portion extending from the tip end of the fourth extending portion toward the upper side of the substrate main body and an eighth extending portion extending from the tip end of the seventh extending portion along the sixth extending portion, And the antenna element is formed in the middle of the antenna while being spaced apart from the ground plane so as to generate a stray capacitance with the ground plane.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2013/000243 WO2014111975A1 (en) | 2013-01-18 | 2013-01-18 | Antenna device |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20150109363A KR20150109363A (en) | 2015-10-01 |
KR101970861B1 true KR101970861B1 (en) | 2019-04-19 |
Family
ID=51209109
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020157019503A KR101970861B1 (en) | 2013-01-18 | 2013-01-18 | Antenna device |
Country Status (4)
Country | Link |
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KR (1) | KR101970861B1 (en) |
CN (1) | CN104854756B (en) |
HK (1) | HK1209906A1 (en) |
WO (1) | WO2014111975A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101805777B1 (en) | 2015-07-01 | 2017-12-07 | 김미정 | Rf passive element and miniaturization method thereof |
WO2018004169A1 (en) | 2016-07-01 | 2018-01-04 | 김미정 | Rf passive device and miniaturization method therefor |
US11862838B2 (en) | 2020-04-17 | 2024-01-02 | Apple Inc. | Electronic devices having wideband antennas |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012114667A (en) * | 2010-11-24 | 2012-06-14 | Mitsubishi Materials Corp | Antenna apparatus |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002111344A (en) * | 2000-10-02 | 2002-04-12 | Mitsubishi Electric Corp | Portable radio device |
JP4633605B2 (en) * | 2005-01-31 | 2011-02-16 | 富士通コンポーネント株式会社 | ANTENNA DEVICE AND ELECTRONIC DEVICE, ELECTRONIC CAMERA, ELECTRONIC CAMERA LIGHT EMITTING DEVICE, AND PERIPHERAL DEVICE |
JP4692635B2 (en) * | 2006-12-04 | 2011-06-01 | パナソニック株式会社 | ANTENNA DEVICE AND ELECTRONIC DEVICE USING THE SAME |
KR101339053B1 (en) * | 2007-06-27 | 2013-12-09 | 삼성전자주식회사 | Built-in antenna and portable terminal having the same |
KR100910526B1 (en) * | 2007-11-20 | 2009-07-31 | 삼성전기주식회사 | Antenna and mobile communication device using the same |
JP2010081000A (en) | 2008-09-24 | 2010-04-08 | Murata Mfg Co Ltd | Composite antenna |
JP2010093383A (en) * | 2008-10-03 | 2010-04-22 | Toshiba Corp | Electrical circuit material, antenna device and method for manufacturing the electrical circuit material |
JP5131481B2 (en) | 2009-01-15 | 2013-01-30 | 株式会社村田製作所 | ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE |
WO2010114307A2 (en) * | 2009-04-02 | 2010-10-07 | 주식회사 아모텍 | Internal antenna module |
JP4941685B2 (en) * | 2009-09-29 | 2012-05-30 | Tdk株式会社 | Antenna and communication device |
JP5035323B2 (en) * | 2009-11-06 | 2012-09-26 | 株式会社村田製作所 | antenna |
JP4935964B2 (en) * | 2009-12-24 | 2012-05-23 | 株式会社村田製作所 | Communication terminal |
CN102130380B (en) * | 2010-01-15 | 2015-04-08 | 深圳市微航磁电技术有限公司 | Process for manufacturing electronic device by polymer-based magnetodielectric material |
CN202395162U (en) * | 2011-12-20 | 2012-08-22 | 睿讯先进科技股份有限公司 | Dual-mode antenna |
-
2013
- 2013-01-18 CN CN201380065801.XA patent/CN104854756B/en not_active Expired - Fee Related
- 2013-01-18 KR KR1020157019503A patent/KR101970861B1/en active IP Right Grant
- 2013-01-18 WO PCT/JP2013/000243 patent/WO2014111975A1/en active Application Filing
-
2015
- 2015-10-23 HK HK15110445.3A patent/HK1209906A1/en not_active IP Right Cessation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012114667A (en) * | 2010-11-24 | 2012-06-14 | Mitsubishi Materials Corp | Antenna apparatus |
Also Published As
Publication number | Publication date |
---|---|
CN104854756A (en) | 2015-08-19 |
HK1209906A1 (en) | 2016-04-08 |
KR20150109363A (en) | 2015-10-01 |
CN104854756B (en) | 2017-11-14 |
WO2014111975A1 (en) | 2014-07-24 |
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