CN114709604A - UHF frequency channel board carries antenna - Google Patents
UHF frequency channel board carries antenna Download PDFInfo
- Publication number
- CN114709604A CN114709604A CN202111574237.7A CN202111574237A CN114709604A CN 114709604 A CN114709604 A CN 114709604A CN 202111574237 A CN202111574237 A CN 202111574237A CN 114709604 A CN114709604 A CN 114709604A
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- CN
- China
- Prior art keywords
- groove
- antenna
- main board
- handheld device
- board
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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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Classifications
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
-
- 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
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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
Abstract
The invention relates to the field of wireless communication, and discloses a UHF frequency band on-board antenna which comprises a mainboard and a pickup, wherein the top end of the mainboard is provided with an Contraband-shaped mounting groove, the mounting groove consists of an upper groove, a vertical groove and a lower groove, one end of the upper groove, which is far away from the vertical groove, is communicated with the outer side of the mainboard, one end of the lower groove, which is far away from the vertical groove, is not communicated with the outer side of the mainboard, the inner wall of the upper groove, which is far away from the lower groove, is provided with a feed point, and the feed point is used for connecting an antenna port of a radio frequency chip. The whole main board is used as the main part of the antenna, and the sound pick-up on the handheld device is used as the auxiliary part of the antenna, so that when a user holds any part of the handheld device by hands, the exposed other parts can radiate or receive electromagnetic waves, normal communication is kept, and the problems of narrow bandwidth, overlarge standing wave ratio and low radiation efficiency of the handheld device in a 640-690 MHz frequency band are solved.
Description
Technical Field
The invention belongs to the field of wireless communication, and particularly relates to a UHF frequency band on-board antenna.
Background
With the development of electronic technology, the degree of integration of ICs (integrated circuits) is higher and higher. There are a large number of systems in terms of electrical performance, namely an IC plus an antenna, such as an RFID access card.
Since the antenna cannot be integrated, or even integrated into an IC, the antenna is one of the objects of intensive research in the field of wireless communication, like the IC.
For two points where the transmission and reception of radio waves are fixed, the attenuation of electromagnetic waves in the air increases with the increase of the frequency. The use of lower radio wave frequencies enables more effective transmission (communication) distances of radio waves; or on the premise of the same transmission distance requirement, the requirement can be met by using smaller transmission power so as to improve the cruising ability of the equipment.
The operating frequency of an antenna of a device is adapted to the operating frequency of the radio waves of the device. The operating frequency of the antenna is also relatively low in order to transmit radio waves of lower frequencies.
The lower the operating frequency of the antenna, the larger the operating wavelength (speed of light = operating wavelength x operating frequency). The size of an antenna is generally proportional to the operating wavelength of the antenna. When the size of the antenna is smaller than 0.1 operating wavelength, the performance is reduced sharply, and the practical usable operating bandwidth is narrowed and the radiation efficiency is reduced.
The practical available antennas also have certain requirements on standing wave ratio. Standing wave ratio refers to the ratio of the voltage of the antinode of the standing wave to the voltage of the valley, and is also called the standing wave coefficient. When the standing-wave ratio is equal to 1, the impedance of the feeder line and the antenna is completely matched, and at the moment, high-frequency energy is radiated by the antenna completely without energy reflection loss; when the standing-wave ratio is infinite, the total reflection is shown, and the energy is not radiated at all. The standing wave ratio of the existing antenna is required to be not more than 3; however, for handheld terminal devices such as mobile phones, in the 640-690 MHz frequency band, the standing-wave ratio of the antenna is difficult to reach below 3 and sometimes even exceeds 4 due to the limitation of the size of the antenna. Therefore, how to improve the radiation efficiency of the antenna and how to reduce the standing-wave ratio is one of the problems to be solved in the field.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides an on-board antenna for a UHF frequency band, which includes a main board, wherein the top end of the main board is provided with an Contraband-shaped mounting groove, the mounting groove is composed of an upper groove, a vertical groove and a lower groove, one end of the upper groove, which is far away from the vertical groove, is communicated with the outer side of the main board, one end of the lower groove, which is far away from the vertical groove, is not communicated with the outer side of the main board, the inner wall of the upper groove, which is far away from the lower groove, is provided with a feed point, and the feed point is used for connecting an antenna port of a radio frequency chip.
Furthermore, the top end of the main board is provided with a plurality of connecting holes in the mounting groove, and the connecting holes are not located in the upper groove.
Further, the number of the connecting holes in the lower groove is more than that of the connecting holes in the vertical groove.
Furthermore, the antenna also comprises a sound pickup of the handheld device, and the sound pickup is connected with the main board through a lead.
Furthermore, the areas of the main board except the mounting groove can be used for wiring.
Further, the main board is located on the handheld device in an area close to the lower end of the handheld device.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the Contraband-shaped mounting groove is formed on the main board, and the areas on two sides of the mounting groove can be used for placing other components, so that the area occupied by the antenna alone is greatly reduced, the cost of the antenna is reduced, and the performance of the antenna is also improved.
2. The whole main board is used as the main part of the antenna, and the sound pick-up on the handheld device is used as the auxiliary part of the antenna, so that when a user holds any part of the handheld device by hands, the exposed other parts can radiate or receive electromagnetic waves, normal communication is kept, and the problems of narrow bandwidth, overlarge standing wave ratio and low radiation efficiency of the handheld device in a 640-690 MHz frequency band are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic diagram comparing standing wave ratios of the present invention;
FIG. 4 is a schematic diagram of the radiation efficiency of the antenna of the present invention;
in the figure: 1. a main board; 2. mounting grooves; 3. feeding points; 4. and connecting the holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the idle place of the device, all the electric devices and the matched drivers thereof are arranged, and all the driving parts in the above-mentioned devices, which refer to the power element, the electric devices and the adaptive power supply, are connected through the conducting wires by those skilled in the art, and specific connection means should be referred to in the following description, wherein the electric connection is completed in sequence among the electric devices, and the detailed connection means thereof are well known in the art.
As shown in fig. 1, the UHF-band on-board antenna provided in this embodiment includes a main board 1, wherein the top end of the main board 1 is provided with an installation groove 2 shaped like "Contraband", the installation groove 2 is composed of an upper groove, a vertical groove and a lower groove, wherein the upper groove is communicated with the vertical groove, one end of the upper groove, which is far away from the vertical groove, is communicated with the outer side of the main board 1, the communication position is used for laying copper on a ground plane, one end of the lower groove, which is far away from the vertical groove, is not communicated with the outer side of the main board 1, the inner wall of the upper groove, which is far away from the lower groove, is provided with a feed point 3, and the feed point 3 is used for connecting an antenna port of a radio frequency chip; in addition, the antenna provided by the invention also comprises a sound pick-up of the handheld device, wherein the sound pick-up is connected with the main board 1 through a lead; the areas of the main board 1 except the mounting groove 1 can be used for wiring, so that the mounting groove 2 shaped like Contraband is formed in the main board 1, and the areas on the two sides of the mounting groove 2 can be used for placing other components, so that the area occupied by the antenna alone is greatly reduced, the cost of the antenna is reduced, and the performance of the antenna is improved; meanwhile, the whole main board 1 is used as a main part of the antenna, and a sound pick-up on the handheld device is used as a secondary part of the antenna, so that when a user holds any part of the handheld device with a hand, the exposed other parts can radiate or receive electromagnetic waves, normal communication is kept, and the problems of narrow bandwidth, overlarge standing wave ratio and low radiation efficiency of the handheld device in a 640-690 MHz frequency band are solved.
In addition to the above:
as shown in fig. 2, a plurality of connecting holes 4 located in the mounting groove 2 are formed at the top end of the main board 1, the plurality of connecting holes 4 are not located in the upper groove, the number of the connecting holes 4 in the lower groove is greater than that of the connecting holes 4 in the vertical groove, the connecting holes 4 are used for mounting screws, and if the mounting screws are not needed, the connecting holes 4 are not needed to be arranged at the position.
In addition, in a general case, the main board 1 is located in an area on the handheld device near the lower end of the handheld device for convenience of layout.
As shown in fig. 3, the left curve is the debugged standing-wave ratio, and it can be seen that the standing-wave ratio is not more than 3 in the working frequency range of 640-690 MHz; the right curve in the figure shows the antenna before it is tuned and matched, which shows that the resonant frequency of the antenna is higher before it is tuned, that is, although the antenna is still somewhat smaller in size (i.e. the whole main board is used as the antenna and the microphone is also used as a part of the antenna) as above, it can be seen from the figure that the antenna finally satisfies the required working bandwidth and standing wave ratio through these processes.
As shown in fig. 4, the radiation efficiency of the antenna reaches over 75%, which is much higher than the radiation efficiency of the handset antenna, which is usually less than 30% in the frequency band.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. An on-board antenna of UHF frequency band, its characterized in that: the antenna comprises a main board (1), a mounting groove (2) in the shape of 'Contraband' is formed in the top end of the main board (1), the mounting groove (2) comprises an upper groove, a vertical groove and a lower groove, one end of the vertical groove, away from the upper groove, is communicated with the outer side of the main board (1), one end of the vertical groove, away from the lower groove, is not communicated with the outer side of the main board (1), a feed point (3) is arranged on the inner wall of the upper groove, away from the lower groove, and the feed point (3) is used for connecting an antenna port of a radio frequency chip.
2. An UHF band on-board antenna as set forth in claim 1, wherein: the top of mainboard (1) is seted up a plurality of connecting hole (4) that are located mounting groove (2), and is a plurality of connecting hole (4) all do not are located the upper groove.
3. An UHF-band on-board antenna as set forth in claim 2, wherein: the number of the connecting holes (4) in the lower groove is more than that of the connecting holes (4) in the vertical groove.
4. An UHF band on-board antenna as set forth in claim 1, wherein: the antenna also comprises a sound pick-up of the handheld device, and the sound pick-up is connected with the main board (1) through a lead.
5. An UHF band on-board antenna as set forth in claim 1, wherein: the areas except the mounting groove (1) on the main board (1) can be used for wiring.
6. An UHF band on-board antenna as set forth in claim 1, wherein: the main board (1) is positioned on the handheld device in an area close to the lower end of the handheld device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111574237.7A CN114709604A (en) | 2021-12-21 | 2021-12-21 | UHF frequency channel board carries antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111574237.7A CN114709604A (en) | 2021-12-21 | 2021-12-21 | UHF frequency channel board carries antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114709604A true CN114709604A (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111574237.7A Pending CN114709604A (en) | 2021-12-21 | 2021-12-21 | UHF frequency channel board carries antenna |
Country Status (1)
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| CN (1) | CN114709604A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101043101A (en) * | 2006-03-20 | 2007-09-26 | 松下电器产业株式会社 | Single feeder built-in multi-frequency band antenna for mobile communication terminal |
| US20110148722A1 (en) * | 2009-12-21 | 2011-06-23 | Symbol Technologies, Inc. | Compact circular polarized monopole and slot uhf rfid antenna systems and methods |
| US20170187118A1 (en) * | 2015-12-29 | 2017-06-29 | Checkpoint Systems, Inc. | Miniaturized planar inverted folded antenna (pifa) for mountable uhf tags design |
| CN112038750A (en) * | 2020-09-04 | 2020-12-04 | 合肥工业大学 | Anti-metal tag antenna applied to UHF frequency band |
| CN212587713U (en) * | 2020-07-29 | 2021-02-23 | 福州物联网开放实验室有限公司 | Antenna with trapped wave function |
| CN112397874A (en) * | 2020-10-30 | 2021-02-23 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Radio frequency identification RFID anti-metal microstrip tag antenna |
-
2021
- 2021-12-21 CN CN202111574237.7A patent/CN114709604A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101043101A (en) * | 2006-03-20 | 2007-09-26 | 松下电器产业株式会社 | Single feeder built-in multi-frequency band antenna for mobile communication terminal |
| US20110148722A1 (en) * | 2009-12-21 | 2011-06-23 | Symbol Technologies, Inc. | Compact circular polarized monopole and slot uhf rfid antenna systems and methods |
| US20170187118A1 (en) * | 2015-12-29 | 2017-06-29 | Checkpoint Systems, Inc. | Miniaturized planar inverted folded antenna (pifa) for mountable uhf tags design |
| CN212587713U (en) * | 2020-07-29 | 2021-02-23 | 福州物联网开放实验室有限公司 | Antenna with trapped wave function |
| CN112038750A (en) * | 2020-09-04 | 2020-12-04 | 合肥工业大学 | Anti-metal tag antenna applied to UHF frequency band |
| CN112397874A (en) * | 2020-10-30 | 2021-02-23 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Radio frequency identification RFID anti-metal microstrip tag antenna |
Non-Patent Citations (1)
| Title |
|---|
| 周兵;邹传云;: "共面波导馈电平面小型化超宽带天线设计", 自动化仪表, no. 06, pages 38 - 41 * |
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