CN110336115B - Antenna capable of simultaneously driving double chips to work - Google Patents
Antenna capable of simultaneously driving double chips to work Download PDFInfo
- Publication number
- CN110336115B CN110336115B CN201910439663.6A CN201910439663A CN110336115B CN 110336115 B CN110336115 B CN 110336115B CN 201910439663 A CN201910439663 A CN 201910439663A CN 110336115 B CN110336115 B CN 110336115B
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- antenna radiation
- radiation area
- chip
- energy
- frequency resonance
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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
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- 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
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
-
- 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
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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- 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
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention provides an antenna capable of simultaneously driving double chips to work, which comprises a first chip, a second chip, an energy coupling unit, an antenna radiation area, a first frequency resonance unit and a second frequency resonance unit, wherein the first chip is connected with the second chip through a first power line; the antenna radiation area receives radio-frequency signals in space, the energy coupling unit couples energy received by the antenna radiation area to the first frequency resonance unit and the second frequency resonance unit, and then the first frequency resonance unit transfers the energy to the first chip, and the second frequency resonance unit transfers the energy to the second chip. The invention realizes the simultaneous access of two tag chips or two other types of receiving chips under the condition of a single antenna.
Description
Technical Field
The invention belongs to the technical field of tag antennas, and particularly relates to an antenna capable of driving double chips to work simultaneously.
Background
The existing UHF RFID tag antenna design is generally connected to a tag chip or a type of receiving chip under the condition of a single antenna. And if the multi-chip is accessed to work under the condition of a single antenna, an additional matching component is needed. The product is then more costly, larger in size, and less consistent in product performance.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an antenna capable of simultaneously driving double chips to work.
The technical scheme adopted by the invention is as follows:
an antenna capable of driving double chips to work simultaneously comprises a first chip, a second chip, an energy coupling unit, an antenna radiation area, a first frequency resonance unit and a second frequency resonance unit; the antenna radiation area receives radio-frequency signals in space, the energy coupling unit couples energy received by the antenna radiation area to the first frequency resonance unit and the second frequency resonance unit, and then the first frequency resonance unit transfers the energy to the first chip, and the second frequency resonance unit transfers the energy to the second chip.
Preferably, the antenna radiation area includes a first antenna radiation area and a second antenna radiation area, and one end of the energy coupling unit is connected to the first antenna radiation area, and the other end of the energy coupling unit is connected to the second antenna radiation area.
Preferably, the total length of the first antenna radiation area and the second antenna radiation area is 1/2 wavelengths of the radio frequency signal in the dielectric body.
Preferably, the energy coupling unit includes a first energy coupling unit and a second energy coupling unit, the antenna radiation area includes a first antenna radiation area, a second antenna radiation area and a third antenna radiation area, one end of the second antenna radiation area is connected to one end of the first energy coupling unit, the other end of the second antenna radiation area is connected to one end of the second energy coupling unit, the other end of the first energy coupling unit is connected to the first antenna radiation area, and the other end of the second energy coupling unit is connected to the third antenna radiation area.
Preferably, the total length of the first antenna radiation area, the second antenna radiation area and the third antenna radiation area is 1/2 wavelengths of radio frequency signals in the dielectric body.
Preferably, a dc blocking capacitor is disposed in the first frequency resonance unit and/or the second frequency resonance unit.
Preferably, the first chip is a UHF tag chip, and the second chip is a UHF tag chip or a radio frequency energy collection chip.
Compared with the prior art, the invention has the beneficial effects that:
the invention can simultaneously access two label chips or two receiving chips of other types under the condition of a single antenna;
the invention provides a method for accessing a plurality of chips to work under the condition of a single antenna without additional matching components, which reduces the product cost and effectively reduces the size of the product, and simultaneously improves the consistency of the product performance because no components are used for matching radio frequency impedance and the distribution parameters of pure PCB routing are used.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
Fig. 1 is a schematic diagram of an antenna capable of driving two chips to operate simultaneously according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an antenna capable of driving two chips to operate simultaneously according to an embodiment of the present invention.
In the figure, 1 — first chip; 2-a second chip; 3-an energy coupling unit; 4-a first frequency resonance unit; 5-a second frequency resonance unit; 6-a first antenna radiation zone; 7-a second antenna radiation zone; 8-a blocking capacitor; 9-a third antenna radiation zone; 10-a first energy coupling unit; 11-second energy coupling unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example one
Referring to fig. 1, an antenna capable of driving two chips to work simultaneously includes a first chip 1, a second chip 2, an energy coupling unit 3, an antenna radiation area, a first frequency resonance unit 4, and a second frequency resonance unit 5; the antenna radiation area receives radio frequency signals in the space, the energy coupling unit 3 couples energy received by the antenna radiation area to the first frequency resonance unit 4 and the second frequency resonance unit 5, and then the first frequency resonance unit 4 transfers the energy to the first chip 1, and the second frequency resonance unit 5 transfers the energy to the second chip 2.
In this embodiment, the first frequency resonance unit 4 and the second frequency resonance unit 5 generate inductance by one or more turns, and the capacitance in the first chip 1 and the second chip 2 generates resonance at the operating frequency of the rf signal.
As an embodiment, the antenna radiation area includes a first antenna radiation area 6 and a second antenna radiation area 7, and one end of the energy coupling unit 3 is connected to the first antenna radiation area 6, and the other end is connected to the second antenna radiation area 7. And the total length of the first antenna radiating area 6 and the second antenna radiating area 7 is required to be 1/2 wavelengths of the radio frequency signal in the dielectric body.
Knowing the rf operating frequency, it follows that the approximate length of the first 6 and second 7 antenna radiating areas is 1/4 wavelengths of the rf signal, with a corresponding reduction in length when in the dielectric body. The first antenna radiation area 6 and the second antenna radiation area 7 can also be bent curves, and have the same length and the slightly longer total length.
The design key points of the size of the frequency resonance unit are that the curve inductance L of the frequency resonance unit and the chip radio frequency port capacitor C resonate at the working frequency f, and the formula is as follows: 4 pi2f2＝1/LC。
The length of the energy coupling unit 3 is designed mainly by considering the impedance of the rf port of the chip, and if the real part of the impedance is larger, a larger coupling coefficient is generally required, that is, the coupling area has a longer coupling length, and vice versa.
According to the design scheme of the superposition of the energy coupling areas, the first chip 1 and the second chip 2 simultaneously obtain energy at the energy coupling unit 3 in the same area of the antenna section, and at the moment, more energy coupling is needed than that of a single chip, so that a large coupling coefficient is needed, and the coupling length is longer; when the first chip 1 and the second chip 2 are respectively used, the Q values of the impedances of the first chip 1 and the second chip 2 are considered (namely, the real part ratio of the impedances is larger, the Q value is smaller), and if the Q value is larger, the corresponding coupling length is shorter.
In this embodiment, when the antenna is designed by using a PCB, the first chip 1 and the second chip 2 and the corresponding first frequency resonant unit 4 and the second frequency resonant unit 5 may be on the same side of the antenna, respectively on different layers of the PCB, such as one on the top layer and one on the bottom layer.
In one embodiment, a dc blocking capacitor 8 is disposed in the first frequency resonance unit 4. Some radio frequency chips cannot make the radio frequency port short-circuit to the ground direct current, and need to use a blocking capacitor 8 for blocking.
The capacitance of the blocking capacitor 8 is selected to be 10pF-1000pF, which does not participate in the design of impedance matching.
In one embodiment, the first chip 1 is a UHF tag chip, and the second chip 2 is a UHF tag chip or a radio frequency energy harvesting chip.
Example two
Referring to fig. 2, an antenna capable of driving two chips to work simultaneously includes a first chip 1, a second chip 2, an energy coupling unit, an antenna radiation area, a first frequency resonance unit 4, and a second frequency resonance unit 5; the antenna radiation area receives radio frequency signals in the space, the energy coupling unit couples energy received by the antenna radiation area to the first frequency resonance unit 4 and the second frequency resonance unit 5, and then the first frequency resonance unit 4 transmits the energy to the first chip 1, and the second frequency resonance unit 5 transmits the energy to the second chip 2.
In this embodiment, the first frequency resonance unit 4 and the second frequency resonance unit 5 generate inductance by one or more turns, and the capacitance in the first chip 1 and the second chip 2 generates resonance at the operating frequency of the rf signal.
As an embodiment, the energy coupling unit includes a first energy coupling unit 10 and a second energy coupling unit 11, the antenna radiation area includes a first antenna radiation area 6, a second antenna radiation area 7 and a third antenna radiation area 9, one end of the third antenna radiation area 9 is connected to one end of the first energy coupling unit 10, the other end is connected to one end of the second energy coupling unit 11, the other end of the first energy coupling unit 10 is connected to the first antenna radiation area 6, and the other end of the second energy coupling unit 11 is connected to the second antenna radiation area 7. And it is required that the total length of the first antenna radiating area 6, the second antenna radiating area 7 and the third antenna radiating area 9 is 1/2 wavelengths of the radio frequency signal in the dielectric body.
Knowing the rf operating frequency, it follows that the total length of the first antenna radiating area 6, the second antenna radiating area 7 and the third antenna radiating area 9 is the length of the wavelength of the rf signal 1/2, with a corresponding reduction when in the dielectric body. The first antenna radiation area 6, the second antenna radiation area 7 and the third antenna radiation area 9 can also be bent curves, and have the same length and the slightly longer total length.
The design key point of the size of the frequency resonance unit is that the frequency resonance unit has the following design pointsThe unit curve inductance L and the chip radio frequency port capacitance C resonate at the working frequency f, and the formula is as follows: 4 pi2f2＝1/LC。
The length design point of the first energy coupling unit 10 and the second energy coupling unit 11 mainly considers the radio frequency port impedance of the chip, and if the real part ratio of the impedance is larger, a larger coupling coefficient is generally required, that is, the coupling area has a longer coupling length, and vice versa.
In the design scheme of the energy coupling unit misalignment of this embodiment, the first chip 1 and the second chip 2 do not acquire energy in the same region, and the length design of the first energy coupling unit 10 and the second energy coupling unit 11 is the same as that of a single chip. The length of the antenna radiating area, without taking into account the fact that the length of the third antenna radiating area 9 is as long as possible within the range that can be designed, but generally does not exceed the 1/4 wavelength length of the radio frequency signal in the dielectric body.
In this embodiment, the first chip 1 and the second chip 2 and the corresponding first frequency resonance unit 4 and the second frequency resonance unit 5 may be distributed on both sides of the antenna.
In one embodiment, a dc blocking capacitor 8 is disposed in the first frequency resonance unit 4. Some radio frequency chips cannot make the radio frequency port short-circuit to the ground direct current, and need to use a blocking capacitor 8 for blocking.
In one embodiment, the first chip 1 is a UHF tag chip, the second chip 2 is a UHF tag chip or a radio frequency energy harvesting chip, and other circuits are added to the energy harvesting chip as a using circuit for harvesting energy.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. An antenna capable of driving double chips to work simultaneously is characterized by comprising a first chip, a second chip, an energy coupling unit, an antenna radiation area, a first frequency resonance unit and a second frequency resonance unit; the antenna radiation area receives radio-frequency signals in space, the energy coupling unit couples energy received by the antenna radiation area to the first frequency resonance unit and the second frequency resonance unit, and then the first frequency resonance unit transfers the energy to the first chip, and the second frequency resonance unit transfers the energy to the second chip; the first chip is a UHF label chip, and the second chip is a UHF label chip or a radio frequency energy collection chip;
wherein, the energy coupling unit couples the energy received by the antenna radiation area to the first frequency resonance unit and the second frequency resonance unit, and the specific coupling mode is as follows:
the energy coupling unit is connected to the middle part of the antenna radiation area, two coupling taps are pulled out of the energy coupling unit, and received energy is coupled to the first frequency resonance unit and the second frequency resonance unit through the two coupling taps respectively;
or
The left side and the right side of the central part of the antenna radiation area are respectively connected with two energy coupling units including a first energy coupling unit and a second energy coupling unit, the received energy is coupled to the first frequency resonance unit through the first energy coupling unit, and the received energy is coupled to the second frequency resonance unit through the second energy coupling unit.
2. The antenna capable of driving two chips to operate simultaneously as claimed in claim 1, wherein the antenna radiation area includes a first antenna radiation area and a second antenna radiation area, one end of the energy coupling unit is connected to the first antenna radiation area, and the other end is connected to the second antenna radiation area.
3. The antenna capable of driving two chips simultaneously according to claim 2, wherein the total length of the first antenna radiation region and the second antenna radiation region is 1/2 wavelengths of radio frequency signals in the dielectric body.
4. The antenna capable of driving two chips to operate simultaneously according to claim 1, wherein the energy coupling unit includes a first energy coupling unit and a second energy coupling unit, the antenna radiation area includes a first antenna radiation area, a second antenna radiation area and a third antenna radiation area, one end of the third antenna radiation area is connected to one end of the first energy coupling unit, the other end of the third antenna radiation area is connected to one end of the second energy coupling unit, the other end of the first energy coupling unit is connected to the first antenna radiation area, and the other end of the second energy coupling unit is connected to the second antenna radiation area.
5. The antenna capable of driving two chips simultaneously according to claim 4, wherein the total length of the first antenna radiation area, the second antenna radiation area and the third antenna radiation area is 1/2 wavelengths of radio frequency signals in the dielectric body.
6. The antenna capable of driving two chips to operate simultaneously according to claim 1, wherein a dc blocking capacitor is disposed in the first frequency resonance unit and/or the second frequency resonance unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910439663.6A CN110336115B (en) | 2019-05-24 | 2019-05-24 | Antenna capable of simultaneously driving double chips to work |
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| CN201910439663.6A CN110336115B (en) | 2019-05-24 | 2019-05-24 | Antenna capable of simultaneously driving double chips to work |
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| CN110336115A CN110336115A (en) | 2019-10-15 |
| CN110336115B true CN110336115B (en) | 2021-02-23 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101740862A (en) * | 2008-11-20 | 2010-06-16 | 东莞市启汉电子科技有限公司 | Dipole antenna of RF chip |
| CN105514593A (en) * | 2014-09-24 | 2016-04-20 | 佳邦科技股份有限公司 | Antenna structure |
| CN106450678A (en) * | 2016-10-24 | 2017-02-22 | 宇龙计算机通信科技(深圳)有限公司 | Antenna assembly and terminal |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100616545B1 (en) * | 2004-05-04 | 2006-08-29 | 삼성전기주식회사 | Multi-band laminated chip antenna using double coupling feeding |
| JP5020161B2 (en) * | 2008-05-16 | 2012-09-05 | 三菱電機株式会社 | Wireless communication device |
| JP4387441B1 (en) * | 2008-07-29 | 2009-12-16 | 株式会社東芝 | ANTENNA DEVICE AND ELECTRONIC DEVICE |
| US9582750B2 (en) * | 2014-12-22 | 2017-02-28 | Avery Dennison Retail Information Services, Llc | RFID devices with multi-frequency antennae |
| CN109344949B (en) * | 2018-08-01 | 2020-06-16 | 浙江大学 | Anti-fake theftproof RFID label of antenna and circuit separation |
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- 2019-05-24 CN CN201910439663.6A patent/CN110336115B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101740862A (en) * | 2008-11-20 | 2010-06-16 | 东莞市启汉电子科技有限公司 | Dipole antenna of RF chip |
| CN105514593A (en) * | 2014-09-24 | 2016-04-20 | 佳邦科技股份有限公司 | Antenna structure |
| CN106450678A (en) * | 2016-10-24 | 2017-02-22 | 宇龙计算机通信科技(深圳)有限公司 | Antenna assembly and terminal |
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