EP2343776A1 - Slot antenna, terminal and method for adjustment parameter of slot antenna - Google Patents
Slot antenna, terminal and method for adjustment parameter of slot antenna Download PDFInfo
- Publication number
- EP2343776A1 EP2343776A1 EP10197121A EP10197121A EP2343776A1 EP 2343776 A1 EP2343776 A1 EP 2343776A1 EP 10197121 A EP10197121 A EP 10197121A EP 10197121 A EP10197121 A EP 10197121A EP 2343776 A1 EP2343776 A1 EP 2343776A1
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- European Patent Office
- Prior art keywords
- slot
- coupling chip
- semi
- area
- antenna
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- Legal status (The legal status 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 status listed.)
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000008878 coupling Effects 0.000 claims abstract description 69
- 238000010168 coupling process Methods 0.000 claims abstract description 69
- 238000005859 coupling reaction Methods 0.000 claims abstract description 69
- 230000005855 radiation Effects 0.000 abstract description 8
- 238000009827 uniform distribution Methods 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003467 diminishing effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- 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
- H01Q13/16—Folded slot antennas
Definitions
- the present invention relates to the field of antenna, and more particularly to a slot antenna, a terminal and a method for adjusting a parameter of a slot antenna.
- a wireless terminal especially a fixed Wireless Local Area Network (WLAN) Access Point (AP), Worldwide Interoperability for Microwave Access (WIMAX) terminal, a wireless fixed station and the like, needs an omni-directional small antenna.
- WLAN Wireless Local Area Network
- AP Wireless Local Area Network
- WIMAX Worldwide Interoperability for Microwave Access
- a slot antenna an antenna formed by a slot cut out on the board is available, which is called a slot antenna.
- a typical slot is rectangular, with the length of approximately half a wavelength, and the slot is generally located in the central part of the board, the area around slot is the board.
- a radio frequency electromagnetic field is excited on the slot, and the slot radiates electromagnetic waves.
- a horizontal pattern view of the slot is roughly the same as the broken lines shown in FIG. 1 .
- the omni-directional radiation feature of the current slot antenna is poor, and the size of the slot antenna is big, occupying a large area of the baseboard.
- the present invention is directed to a slot antenna, a terminal and a method for adjusting a parameter of the slot antenna.
- the technical solutions are described as follows.
- a slot antenna which includes a board, a coupling chip, and a feed point;
- a terminal which includes a slot antenna, and the slot antenna includes a board, a coupling chip, and a feed point;
- a method for adjusting a parameter a slot antenna includes:
- a slot is formed between the edges around the coupling chip and the board, so that the uniform distribution of the current on the board and better omni-directional radiation feature are achieved.
- the semi-closed slot area is at the edge of the board, and therefore the antenna is smaller.
- the present invention can achieve obtaining the low resonant frequency as well as decreasing the size of the antenna by enlarging the coupling chip, increasing the number of layers of the coupling chip, and/or diminishing the slot when the size of the semi-closed slot area is kept unchanged or is smaller, thus occupying a smaller area on a baseboard and leaving more area for other components.
- the present invention provides a slot antenna, which includes a board 101, a coupling 102, and a feeding 103;
- the present invention provides a slot antenna.
- a slot is formed between the edges of the coupling chip and the board, so that the uniform distribution of the current on the board and better omni-directional radiation feature is achieved.
- the semi-closed slot area is at the edge of the board, and therefore the antenna is smaller, occupying a smaller area on a baseboard and leaving more area for other components.
- the shape of the coupling chip 102 may be rectangle, hexagon and other forms, and is not limited in this embodiment.
- the coupling chip may have one layer or more, and when the coupling chip has multiple layers, the different layers of the coupling chip may be identical or different.
- FIG. 3 is a separated schematic structural view of a multilayer coupling chip, and when being assembled, the first layer of coupling chip 1021 and the second layer of coupling chip 1022 are overlapped, with a certain interval there-between vertically. When the couplings chips have different shapes, the radiation feature of the slot antenna is better.
- a distance from the feed point 103 to the edge of the opening of the semi-closed slot area 104 is shorter than three-fifths of a distance of one side of the coupling chip 102 extending from the edge of the opening to the lower wall 104a, and such a structure is beneficial to the radiation feature of the antenna.
- the feeding modes of the slot antenna through the feed point 103 include, but are not limited to, connecting the feed point 103 with the coupling chip 102 and the feed line respectively, or feeding, at the feed point 103, through a transmission line that straddles the slot.
- the shape of the semi-closed slot area 104 may include rectangle, semicircle, U-shape, V-shape and other shapes, and is not limited in this embodiment.
- the slot antenna may include matching components that may be respectively connected with the feed point 103 and a feed line, and/or, respectively connected with the coupling chip 102 and the board 101.
- the slot antenna may be set on a baseboard, and the baseboard may specifically be a Printed Circuit Board (PCB).
- PCB Printed Circuit Board
- the present invention provides a slot antenna.
- a slot is formed between the edges of the coupling chip and the board, so that the uniform distribution of the current on the board is achieved.
- FIG. 4 shows a directional diagram of measurement or emulation, and compared with the prior art, the antenna according to the present invention has better omni-directional radiation feature.
- the slot has to be enlarged, that is, the size of the antenna has to be increased, however, the present invention can achieve obtaining the low resonant frequency as well as decreasing the size of the antenna by enlarging the coupling chip, increasing the number of layers of the coupling chip, and/or diminishing the slot when the size of the semi-closed slot area is kept unchanged or is smaller.
- the slot is set at the edge of the board according to the present invention so that the antenna is smaller, and thus the antenna occupies a smaller area on a baseboard, and leaving more area for other components.
- the present invention provides a slot antenna.
- the slot may be set wide, and multiple resonant modes could be achieved by slot coupling.
- the slot antenna possesses an ultra-bandwidth feature, and thus has a lower demand for the processing precision and thickness, has good consistency, and is easy to debug.
- the present invention further provides a terminal, which includes a slot antenna according to the present invention.
- a terminal which includes a slot antenna according to the present invention.
- the terminal may include a wireless gateway, a fixed station, or a network card.
- the present invention further provides a parameter adjustment method of the slot antenna, where the method includes:
- the method according to the present invention achieves obtaining low resonant frequency as well as decreasing the size of the antenna by enlarging the coupling chip, increasing the number of layers of the coupling chip, and/or diminishing the slot when the semi-closed slot area is kept unchanged or is smaller, thus occupying a smaller area on the baseboard and leaving more area for other components.
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- Details Of Aerials (AREA)
Abstract
Description
- The present invention relates to the field of antenna, and more particularly to a slot antenna, a terminal and a method for adjusting a parameter of a slot antenna.
- A wireless terminal, especially a fixed Wireless Local Area Network (WLAN) Access Point (AP), Worldwide Interoperability for Microwave Access (WIMAX) terminal, a wireless fixed station and the like, needs an omni-directional small antenna.
- Currently, an antenna formed by a slot cut out on the board is available, which is called a slot antenna. Referring to
FIG. 1 , a typical slot is rectangular, with the length of approximately half a wavelength, and the slot is generally located in the central part of the board, the area around slot is the board. A radio frequency electromagnetic field is excited on the slot, and the slot radiates electromagnetic waves. Upon measurement, a horizontal pattern view of the slot is roughly the same as the broken lines shown inFIG. 1 . - During the conception of the present invention, the inventor finds that the prior art has at least the following drawbacks. The omni-directional radiation feature of the current slot antenna is poor, and the size of the slot antenna is big, occupying a large area of the baseboard.
- To improve the omni-directional radiation feature of the antenna and decrease the size of the antenna, the present invention is directed to a slot antenna, a terminal and a method for adjusting a parameter of the slot antenna. The technical solutions are described as follows.
- A slot antenna is provided, which includes a board, a coupling chip, and a feed point; where
- a semi-closed slot area is formed on one side of the board;
- the coupling chip is in the semi-closed slot area and forms a slot with a side wall and a lower wall of the semi-closed slot area; and
- the feed point is located in the slot formed between the coupling chip and the side wall.
- A terminal is provided, which includes a slot antenna, and the slot antenna includes a board, a coupling chip, and a feed point; where
- a semi-closed slot area is formed on one side of the board;
- the coupling chip is in the semi-closed slot area and forms a slot with a side wall and a lower wall of the semi-closed slot area; and
- the feed point is located in the slot formed between the coupling chip and the side wall.
- A method for adjusting a parameter a slot antenna is provided, where the method includes:
- obtaining a parameter of the slot antenna, and the parameter includes resonant frequency and/or bandwidth;
- adjusting, according to the resonant frequency, at least one of a size of the slot, a size of the semi-closed slot area, a size of the coupling chip, and the number of layers of the coupling chip; and
- adjusting, according the bandwidth, at least one of the size of the slot and the number of layers of the coupling chip.
- The technical solutions according to the present invention have the following benefits.
- By opening a semi-closed slot area on the board and setting a coupling chip in the semi-closed slot area, a slot is formed between the edges around the coupling chip and the board, so that the uniform distribution of the current on the board and better omni-directional radiation feature are achieved. The semi-closed slot area is at the edge of the board, and therefore the antenna is smaller. In addition, when the current slot antenna intends to obtain a low resonant frequency, the slot has to be enlarged, that is, the size of the antenna has to be increased, however, the present invention can achieve obtaining the low resonant frequency as well as decreasing the size of the antenna by enlarging the coupling chip, increasing the number of layers of the coupling chip, and/or diminishing the slot when the size of the semi-closed slot area is kept unchanged or is smaller, thus occupying a smaller area on a baseboard and leaving more area for other components.
-
-
FIG. 1 is a schematic structural view and a directional diagram of a slot antenna in the prior art; -
FIG. 2 is a schematic structural view of a slot antenna according to an embodiment of the present invention; -
FIG. 3 is a separated schematic structural view of a slot antenna with multilayer coupling chip according to an embodiment of the present invention; -
FIG. 4 is a directional diagram of a slot antenna according to an embodiment of the present invention; and -
FIG. 5 is a flow chart of a method for adjusting a parameter of a slot antenna according to an embodiment of the present invention. - In order to make the objectives, technical solution and merits of the present invention clearer, a detailed description of the present invention is given below with reference to the accompanying drawings.
- Referring to
FIG. 2 , the present invention provides a slot antenna, which includes aboard 101, acoupling 102, and afeeding 103; where - a
semi-closed slot area 104 is formed on one side of theboard 101; - the
coupling chip 102 is located in thesemi-closed slot area 104 and forms a slot with alower wall 104a and aside wall 104b of the semi-closed slot area; - where the edge of the
semi-closed slot area 104 opposite to an opening of thesemi-closed slot area 104 is called thelower wall 104a, and the edge of thesemi-closed slot area 104 that is extended from thelower wall 104a to the two flanks is called theside wall 104b; and - the
feed point 103 is located in the slot formed between thecoupling chip 102 and theside wall 104b. - The present invention provides a slot antenna. By opening a semi-closed slot area on the board and setting a coupling chip in the semi-closed slot area, a slot is formed between the edges of the coupling chip and the board, so that the uniform distribution of the current on the board and better omni-directional radiation feature is achieved. The semi-closed slot area is at the edge of the board, and therefore the antenna is smaller, occupying a smaller area on a baseboard and leaving more area for other components.
- The shape of the
coupling chip 102 may be rectangle, hexagon and other forms, and is not limited in this embodiment. The coupling chip may have one layer or more, and when the coupling chip has multiple layers, the different layers of the coupling chip may be identical or different.FIG. 3 is a separated schematic structural view of a multilayer coupling chip, and when being assembled, the first layer ofcoupling chip 1021 and the second layer ofcoupling chip 1022 are overlapped, with a certain interval there-between vertically. When the couplings chips have different shapes, the radiation feature of the slot antenna is better. - A distance from the
feed point 103 to the edge of the opening of thesemi-closed slot area 104 is shorter than three-fifths of a distance of one side of thecoupling chip 102 extending from the edge of the opening to thelower wall 104a, and such a structure is beneficial to the radiation feature of the antenna. In addition, the feeding modes of the slot antenna through thefeed point 103 include, but are not limited to, connecting thefeed point 103 with thecoupling chip 102 and the feed line respectively, or feeding, at thefeed point 103, through a transmission line that straddles the slot. - The shape of the
semi-closed slot area 104 may include rectangle, semicircle, U-shape, V-shape and other shapes, and is not limited in this embodiment. - In another embodiment, the slot antenna may include matching components that may be respectively connected with the
feed point 103 and a feed line, and/or, respectively connected with thecoupling chip 102 and theboard 101. - In another embodiment, the slot antenna may be set on a baseboard, and the baseboard may specifically be a Printed Circuit Board (PCB).
- The present invention provides a slot antenna. By opening a semi-closed slot area on the board and setting a coupling chip in the semi-closed slot area, a slot is formed between the edges of the coupling chip and the board, so that the uniform distribution of the current on the board is achieved.
FIG. 4 shows a directional diagram of measurement or emulation, and compared with the prior art, the antenna according to the present invention has better omni-directional radiation feature. When the current slot antenna intends to obtain a low resonant frequency, the slot has to be enlarged, that is, the size of the antenna has to be increased, however, the present invention can achieve obtaining the low resonant frequency as well as decreasing the size of the antenna by enlarging the coupling chip, increasing the number of layers of the coupling chip, and/or diminishing the slot when the size of the semi-closed slot area is kept unchanged or is smaller. Meanwhile, the slot is set at the edge of the board according to the present invention so that the antenna is smaller, and thus the antenna occupies a smaller area on a baseboard, and leaving more area for other components. Moreover, the present invention provides a slot antenna. The slot may be set wide, and multiple resonant modes could be achieved by slot coupling. The slot antenna possesses an ultra-bandwidth feature, and thus has a lower demand for the processing precision and thickness, has good consistency, and is easy to debug. - In another embodiment, the present invention further provides a terminal, which includes a slot antenna according to the present invention. As for the slot antenna and the technical effect of the slot antenna, the detailed descriptions are made foregoing, and the details will not be described herein again. Moreover, the terminal may include a wireless gateway, a fixed station, or a network card.
- Referring to
FIG. 5 , based on the slot antenna according to an embodiment of the present invention, the present invention further provides a parameter adjustment method of the slot antenna, where the method includes: - 201: obtaining parameters of the slot antenna, where the parameters include resonant frequency and/or bandwidth;
- 202: adjusting, according to the resonant frequency, at least one of a size of slot, a size of the semi-closed slot area, a size of the coupling chip, and the number of layers of the coupling chip; adjusting, according the bandwidth, at least one of the size of the slot and the number of layers of the coupling chip.
- The lower the resonant frequency of the slot antenna is demanded, the bigger the proportion of the
semi-closed slot area 104 may be set, and at this time, if the slot is enlarged with the size of the coupling chip kept unchanged, the resonant frequency will be higher, however, since the proportion of the semi-closed slot area poses a greater effect on the resonant frequency of the antenna, the resonant frequency as a whole is still lowered. Accordingly, the higher the resonant frequency of the slot antenna is demanded, the smaller the proportion of thesemi-closed area 104 may be set. - The lower the resonant frequency of the slot antenna is demanded, the bigger the area of the
coupling chip 102 may be set. Accordingly, the higher the resonant frequency is demanded, the smaller the area of thecoupling chip 102 may be set. - The lower the resonant frequency of the slot antenna and the wider the bandwidth are demanded, the more the number of layers of the
coupling chip 102 may be set. Accordingly, the higher the resonant frequency and narrower the bandwidth are demanded, the less the number of layers of thecoupling chip 102 may be set. - The higher the resonant frequency of the slot antenna and the wider the bandwidth are demanded, the bigger the slot may be set. Accordingly, the lower the resonant frequency of the slot antenna and the narrower the bandwidth are demanded, the smaller the slot may be set.
- Compared with the current slot antenna, which achieves obtaining low resonant frequency only by enlarging the slot, that is, increasing the size of the antenna, the method according to the present invention achieves obtaining low resonant frequency as well as decreasing the size of the antenna by enlarging the coupling chip, increasing the number of layers of the coupling chip, and/or diminishing the slot when the semi-closed slot area is kept unchanged or is smaller, thus occupying a smaller area on the baseboard and leaving more area for other components.
- The above descriptions are merely some exemplary embodiments of the present invention, but are not intended to limit the present invention. Any modification, equivalent replacement, or improvement made without departing from the principle of the present invention shall fall within the scope of the present invention.
Claims (10)
- A slot antenna, comprising a board, a coupling chip, and a feed point, wherein
a semi-closed slot area is formed on one side of the board;
the coupling chip is in the semi-closed slot area and forms a slot with a side wall and a lower wall of the semi-closed slot are; and
the feed point is located in the slot formed between the coupling chip and the side wall. - The slot antenna according to claim 1, wherein a distance from the feed point to an edge of an opening of the semi-closed slot area is shorter than three-fifths of a distance of one side of the coupling chip extending from the edge of the opening to the lower wall.
- The slot antenna according to claim l, wherein the coupling chip has one layer or more, and when the coupling chip has multiple layers, the different layers of the coupling chip have identical or different shapes.
- The slot antenna according to claim l, wherein the slot antenna further comprises matching components, and
the matching components are respectively connected with the feed point and a feed line, and/or the matching components are respectively connected with the coupling chip and the board. - A terminal, comprising a slot antenna, wherein the slot antenna comprises a board, a coupling chip, and a feed point;
a semi-closed slot area is formed on one side of the board;
the coupling chip is in the semi-closed slot area and forms a slot with a side wall and a lower wall of the semi-closed slot area; and
the feed point is located in the slot formed between the coupling chip and the side wall. - The terminal according to claim 5, wherein a distance from the feed point to an edge of an opening of the semi-closed slot area is shorter than three-fifths of a distance of one side of the coupling chip extending from the edge of the opening to the lower wall.
- The terminal according to claim 5, wherein the coupling chip has one layer or more, and when the coupling chip has multiple layers, the different layers of the coupling chip have identical or different shapes.
- The terminal according to claim 5, wherein the slot antenna further comprises matching components, and
the matching components are respectively connected with the feed point and a feed line, and/or the matching components are respectively connected with the coupling chip and the board. - The terminal according to claim 5, wherein the terminal comprises a wireless gateway, a fixed station, or a network card.
- A method for adjusting a parameter of a slot antenna according to any one of claims 1 to 9, the method comprising:obtaining parameters of the slot antenna, wherein the parameters comprise resonant frequency and/or bandwidth;adjusting, according to the resonant frequency, at least one of a size of the slot, a size of the semi-closed slot area, a size of the coupling chip, and the number of layers of the coupling chip; andadjusting, according the bandwidth, at least one of the size of the slot and the number of layers of the coupling chip.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201010001612.4A CN101719598B (en) | 2010-01-07 | 2010-01-07 | Slit antenna, parameter regulation method and terminal thereof |
Publications (2)
Publication Number | Publication Date |
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EP2343776A1 true EP2343776A1 (en) | 2011-07-13 |
EP2343776B1 EP2343776B1 (en) | 2013-07-03 |
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ID=42434134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20100197121 Active EP2343776B1 (en) | 2010-01-07 | 2010-12-28 | Slot antenna, terminal and method for adjustment parameter of slot antenna |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2343776B1 (en) |
CN (1) | CN101719598B (en) |
ES (1) | ES2427401T3 (en) |
WO (1) | WO2011082590A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2765648A1 (en) * | 2011-07-21 | 2014-08-13 | Smart Co., Ltd. | Universal ic tag, method of manufacturing same, and communication management system |
WO2016047234A1 (en) * | 2014-09-22 | 2016-03-31 | セイコーソリューションズ株式会社 | Compact slot-type antenna |
Families Citing this family (13)
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CN101719598B (en) * | 2010-01-07 | 2014-03-12 | 华为终端有限公司 | Slit antenna, parameter regulation method and terminal thereof |
CN102509850B (en) * | 2011-10-21 | 2014-08-27 | 深圳市信维通信股份有限公司 | Mobile terminal, antenna device for mobile terminal, and feed method |
CN103187615B (en) * | 2011-12-31 | 2016-07-27 | 华为终端有限公司 | Antenna and manufacture method, printed circuit board (PCB), communication terminal |
TWI509892B (en) | 2013-03-21 | 2015-11-21 | Arcadyan Technology Corp | Antenna structure and the manufacturing method thereof |
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TWI645619B (en) * | 2016-05-19 | 2018-12-21 | 中國鋼鐵股份有限公司 | Circular polarization antenna structure suitable for full frequency |
CN108521028B (en) * | 2016-07-19 | 2019-10-25 | Oppo广东移动通信有限公司 | Casing device and terminal device |
TWI645620B (en) * | 2016-10-12 | 2018-12-21 | 中國鋼鐵股份有限公司 | Frequency reconfigurable circularly polarized antenna |
CN111628274B (en) * | 2019-02-27 | 2022-10-04 | 华为技术有限公司 | Antenna device and electronic apparatus |
WO2020173292A1 (en) | 2019-02-27 | 2020-09-03 | 华为技术有限公司 | Antenna apparatus and electronic device |
CN110072330B (en) * | 2019-05-08 | 2024-08-13 | 京信通信技术(广州)有限公司 | PCB circuit adjusting component and antenna |
CN113131182B (en) * | 2019-12-30 | 2023-06-20 | 华为技术有限公司 | Antenna and electronic equipment |
CN112306299B (en) * | 2020-10-30 | 2024-01-26 | 维沃移动通信有限公司 | Touch panel integrated with antenna and electronic equipment |
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US6097345A (en) * | 1998-11-03 | 2000-08-01 | The Ohio State University | Dual band antenna for vehicles |
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TWI246794B (en) * | 2005-02-05 | 2006-01-01 | Benq Corp | Communicator and antenna used in the communicator |
JP4826902B2 (en) * | 2006-05-16 | 2011-11-30 | 株式会社村田製作所 | Slot antenna, high-frequency module and wireless communication device |
CN101540433B (en) * | 2009-05-08 | 2013-06-12 | 华为终端有限公司 | Antenna design method and data card veneer of wireless terminal |
CN101540432B (en) * | 2009-05-08 | 2012-07-04 | 华为终端有限公司 | Antenna design method and data card veneer of wireless terminal |
CN101719598B (en) * | 2010-01-07 | 2014-03-12 | 华为终端有限公司 | Slit antenna, parameter regulation method and terminal thereof |
-
2010
- 2010-01-07 CN CN201010001612.4A patent/CN101719598B/en active Active
- 2010-09-09 WO PCT/CN2010/076764 patent/WO2011082590A1/en active Application Filing
- 2010-12-28 ES ES10197121T patent/ES2427401T3/en active Active
- 2010-12-28 EP EP20100197121 patent/EP2343776B1/en active Active
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US5404146A (en) * | 1992-07-20 | 1995-04-04 | Trw Inc. | High-gain broadband V-shaped slot antenna |
US20010050651A1 (en) * | 1998-05-28 | 2001-12-13 | Christophe Grangeat | Radiocommunications device, and a slot loop antenna |
US6097345A (en) * | 1998-11-03 | 2000-08-01 | The Ohio State University | Dual band antenna for vehicles |
US20080169989A1 (en) * | 2007-01-15 | 2008-07-17 | Agc Automotive Americas R&D, Inc. | Multi-Band Antenna |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2765648A1 (en) * | 2011-07-21 | 2014-08-13 | Smart Co., Ltd. | Universal ic tag, method of manufacturing same, and communication management system |
EP2765648A4 (en) * | 2011-07-21 | 2015-01-28 | Smart Co Ltd | Universal ic tag, method of manufacturing same, and communication management system |
WO2016047234A1 (en) * | 2014-09-22 | 2016-03-31 | セイコーソリューションズ株式会社 | Compact slot-type antenna |
US10665950B2 (en) | 2014-09-22 | 2020-05-26 | Seiko Solutions Inc., Chikouji | Compact slot-type antenna |
Also Published As
Publication number | Publication date |
---|---|
WO2011082590A1 (en) | 2011-07-14 |
EP2343776B1 (en) | 2013-07-03 |
CN101719598B (en) | 2014-03-12 |
CN101719598A (en) | 2010-06-02 |
ES2427401T3 (en) | 2013-10-30 |
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