CN105870626A - Coupled feeding near-field antenna and equipment thereof - Google Patents
Coupled feeding near-field antenna and equipment thereof Download PDFInfo
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- CN105870626A CN105870626A CN201610226126.XA CN201610226126A CN105870626A CN 105870626 A CN105870626 A CN 105870626A CN 201610226126 A CN201610226126 A CN 201610226126A CN 105870626 A CN105870626 A CN 105870626A
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- couple feed
- radio
- stratum
- near field
- couple
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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
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
Abstract
The invention provides a coupled feeding near-field antenna and equipment thereof. The coupled feeding near-field antenna comprises a radio-frequency antenna radiator, a grounding body and a coupled feeding module, wherein a first gap is formed between the radio-frequency antenna radiator and the grounding body; and the coupled feeding module and the radio-frequency antenna radiator are arranged in parallel and are not in direct contact. Near-field communication is achieved in a coupled feeding manner; and a component does not need to be increased, so that the space of the communication terminal is greatly reduced when the cost is reduced. Direct contact with the radio-frequency antenna radiator is not needed, so that the interference of a radio-frequency signal is greatly reduced; and the communication quality is improved.
Description
Technical field
The present invention relates to the near-field communication field of field of wireless communication, more particularly, to couple feed formula near field antenna.
Background technology
Universal along with metal back cover communicating terminal in recent years, the solution that conventional NFC antenna is attached at plastic handset bonnet the most gradually becomes no longer to be suitable for, but all-metal bonnet design commonly used in high-end handheld terminal, be there is bigger suppression in tradition NFC performance, even arrive completely losing of NFC function.Taking this, realizing NFC function in metal back cover mode becomes the important problem that industry needs to solve.At present, major part solution be use terminal rear portion shooting head bore crack process mode, or mode of cracking between rear portion photographic head and fingerprint identification hole, the power coil of near field antenna is placed around rear portion photographic head or fingerprint identification hole, this mode needs to increase power coil and ferrite, cost is high and takes up room big, additionally cracks at rear portion, stage casing and destroys the globality of outward appearance；Another fraction uses near field antenna and radio-frequency antenna to share the mode of back-metal part, and near field aerial signal need to be fed directly into metal radiation sheet, thus cannot avoid the impact of radiofrequency signal by this mode.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of low interference, the couple feed formula near field antenna of low cost and equipment thereof.
For solving above-mentioned technical problem, present invention provide the technical scheme that a kind of couple feed formula near field antenna, including radio-frequency antenna radiant body and grounding body, it is provided with the first gap between described radio-frequency antenna radiant body and grounding body, also include couple feed module, described couple feed module be arranged in parallel with radio-frequency antenna radiant body, and is not directly contacted with.
The mode using couple feed realizes near-field communication, without additionally increasing parts, it is greatly saved the space of communicating terminal while reducing cost, it is not necessary to directly contact with radio-frequency antenna radiant body, greatly reduce the interference of radiofrequency signal so that communication quality gets a promotion.
Described couple feed module includes the couple feed parts that one end does not contacts with radio-frequency antenna radiant body and be arranged in parallel, and the other end ground connection of couple feed parts is also connected by the first isolation inductance L1 simultaneously and has the RFID module filtering radiofrequency signal effect.
Described first isolation inductance L1 is that high q-factor isolates inductance.Strengthen by arranging the first isolation inductance L1 and RFID module radiofrequency signal is filtered effect so that signal is purer.
Described couple feed parts are by the second isolation inductance L2 ground connection.Described second isolation inductance L2 is that high q-factor isolates inductance.Further filter out high-frequency signal so that signal is cleaner.
Described RFID module includes that balun device B, one end of balun device B electric capacity Cp in parallel and series capacitance Cs connect the first isolation inductance L1, and the other end connects radio frequency chip by LC low pass filter.
First low-impedance end of described balun device B connects series capacitance Cs, the first high impedance end ground connection, connects shunt capacitance Cp, the second low-impedance end and the second high impedance end and connect LC low pass filter between the first low-impedance end and the first high impedance end.
First high impedance end of described balun device connects series capacitance Cs, the second high impedance end ground connection, connects shunt capacitance Cp, the first low-impedance end and the second low-impedance end and connect LC low pass filter between the first high impedance end and the second high impedance end.
The differential signal that RFID module produces signal after overbalance-non-equilibrium conversion enters into coupling conductors parts through inductance L1, then passes through inductance L2 or be directly entered mainboard stratum, forms loop.The signal and the low interference that form near-field communication transmit signal.
A kind of near-field communication device, including syllogic metal back cover and communicating terminal mainboard, described syllogic metal back cover includes bonnet on metal, intermetallic metal lid and lower bonnet, include bottom described communicating terminal mainboard feeding stratum and mainboard stratum, described feed stratum and mainboard stratum are separated by the second gap, and on described metal, bonnet, intermetallic metal lid and feed stratum are respectively as above-mentioned radio-frequency antenna radiant body, grounding body and couple feed parts.By directly reequiping on communicating terminal mainboard, use coupling feed way to realize the near field antenna function of metal back cover, be greatly saved the inner space of communicating terminal.
Multiple high capacitance electric capacity C1 it is serially connected with between described feed stratum and the radio-frequency antenna earth point of communicating terminal, between described feed stratum and mainboard stratum.
The present invention uses the mode of coupling feed point to realize the near field antenna function of metal back cover, has abandoned power coil coil and has added ferritic traditional approach, and price more saves, and terminal contour is without design of additionally cracking so that product is the most attractive in appearance.Additionally share metal radiation sheet from radio-frequency antenna with general near field the most different, the design is without being fed directly into metal radiation sheet by near field aerial signal, but use the mode of couple feed to realize, and the metallic conductor of coupling is without single special, processes at cell phone mainboard bottom and all can realize.
Compared with prior art, present invention have the advantage that
1. the present invention is without using power coil to add ferritic traditional approach, has more preferable cost advantage,
2. the present invention is without using cracking of metal back cover, and the degree of freedom of configuration design is higher, and more attractive.
3. the present invention without being directly fed into metal radiation sheet (using the mode being divided into one piece of couple feed sheet on mainboard to be of coupled connections the radiation fin of near-field signals so that the interference of radiofrequency signal is less) by near-field signals, and the impact on radio-frequency antenna is less.
4. the present invention utilizes the repacking of mainboard bottom to complete the coupling to metal radiation sheet, it is possible to maximum utilizes terminal inner space.
Accompanying drawing explanation
Fig. 1 is the stereochemical structure of syllogic metal back cover communicating terminal of the present invention.
Fig. 2 is the embodiment of the present invention 1 and 2 couple feed formula near field antenna structural representation.
Fig. 3 is the embodiment of the present invention 1 and 2 couple feed member connection structure schematic diagram.
Fig. 4 is embodiment of the present invention 1RFID modular electrical structural representation.
Fig. 5 embodiment of the present invention 2RFID modular electrical structural representation.
Fig. 6 is the embodiment of the present invention 3 and 4 couple feed formula near field antenna structural representation.
Fig. 7 is the embodiment of the present invention 3 and 4 couple feed member connection structure schematic diagram.
Fig. 8 embodiment of the present invention 3RFID modular electrical structural representation.
Fig. 9 embodiment of the present invention 4RFID modular electrical structural representation.
Figure 10 is the embodiment of the present invention 3 and 4 mainboard bottom layer realization near field illustrative view of functional configuration.
Figure 11 is that embodiment of the present invention mainboard bottom components and parts connect pictorial diagram.
Wherein, 1 is syllogic metal back cover, and 2 is communicating terminal mainboard, 3 is display screen, and 41 is couple feed module, and 411 is couple feed parts, 412 is RFID module, 11 is radio-frequency antenna radiant body, and 12 is grounding body, and 13 is the first gap, 212 is radio-frequency antenna earth point, 22 is feed stratum, and 23 is mainboard stratum, and 24 is the second gap, B is balun device, L1 is the first isolation inductance, and L2 is the second isolation inductance, and Cp is shunt capacitance, Cs is series capacitance, L0 is inductance, and C0 is electric capacity, and C1 is high capacitance electric capacity.
Detailed description of the invention
The present invention is explained in further detail below in conjunction with accompanying drawing and embodiment for the ease of it will be appreciated by those skilled in the art that.
Embodiment
1
As Figure 1-4, the near field antenna of a kind of couple feed formula and equipment thereof, its object is to solve the near-field communication function of communicating terminal all-metal bonnet.Couple feed formula near field antenna includes radio-frequency antenna radiant body and the grounding body separated by the first gap, and be arranged in parallel with radio-frequency antenna radiant body and there are the couple feed parts of certain distance, described couple feed parts have the RFID module (i.e. radio-frequency module) filtering radiofrequency signal effect by the first isolation inductance connection of high q-factor, described couple feed formula near field antenna equipment is the communicating terminal being provided with couple feed formula near field antenna, and this equipment includes syllogic metal back cover 1 and couple feed module 41.Wherein couple feed module 41 mainly comprises couple feed parts 411 and RFID module 412.The differential signal that RFID module 412 produces signal after overbalance-non-equilibrium conversion enters into couple feed parts 411 through the first isolation inductance L1, then connects entrance mainboard stratum by wire, forms loop.And couple feed parts 411 couple the radio-frequency antenna radiant body 11 in all-metal bonnet 1, to realize the near field functional characteristic of metal back cover.
It is the present embodiment version of being used the syllogic communicating terminal of a kind of routine as shown in Figure 1, including syllogic metal back cover 1, communicating terminal mainboard 2 and display screen 3.
Fig. 2 is the present embodiment couple feed module 41 and the one of which structural representation of syllogic metal back cover 1 implementation.Syllogic metal back cover includes bonnet on the metal as radio-frequency antenna radiant body 11 and as the intermetallic metal lid of grounding body 12 and lower bonnet, wherein radio-frequency antenna radiant body 11 is as radio frequency antenna element, it is commonly used to outside radiated electromagnetic wave, and intermetallic metal lid uses usually used as shielding and heat radiation.There is the first gap 13 of one section of plastic cement between radio-frequency antenna radiant body 11 and intermetallic metal lid 12, the first gap transversely cutting metal back cover, the first gap width is typically between 1.5mm to 2.0mm.The main radiation component of couple feed module 41 i.e. couple feed parts 411 are placed in parallel with radiant body 11, and do not do directly contact.
Fig. 3 is the version of the present embodiment couple feed module.It mainly includes the couple feed parts 411 for coupling with radio-frequency antenna radiant body 11, and its material is metal；Also including that the high q-factor first being connected between couple feed parts 411 and RFID module isolates inductance L1, it act as isolating the high-frequency signal on radiation component 11；Make high-frequency signal can not enter near field communication module, it is to avoid high-frequency signal brings noise to debugging and the transmission of near-field communication signal.
Fig. 4 is the RFID module electric connecting mode described in the present embodiment.Couple feed parts 411 are connected to isolate one end of inductance L1, ground connection simultaneously, the shunt capacitance Cp accessed for debugging coupling in parallel between the other end and the ground of L1, L1 connects access again for series capacitance Cs debugging coupling simultaneously, series capacitance Cs is linked into one of them the Low ESR port in balun device B, the Low ESR port ground connection of the other end.Two ports of the residue of balun device are linked into the LC low pass filter of difference, complete the conversion of non-equilibrium-balance, wherein low pass filter includes inductance L0 and electric capacity C0, one end of two electric capacity CO connects two ports of residue of balun device respectively, the other end all accesses ground, one end of two inductance L0 connects two ports of residue of balun device and connects, and the other end is all connected to the Tx end of RFID chip.
The present invention has abandoned the implementation of traditional power coil, and without doing design of specifically cracking in metal back cover.Additionally the present invention is without directly feeding on the metal radiation sheet of metal back cover, but utilizes the change of mainboard bottom to realize and the coupling of metal radiation sheet so that metallic terminations has the function of near-field communication.
Embodiment
2
As it is shown in figure 5, be the present embodiment RFID module electric connecting mode, the present embodiment and embodiment 1 main difference is that what series capacitance Cs was connected with earth terminal is the high impedance port of balun device B.Remaining arranges same as in Example 1.
Embodiment
3
As shown in Fig. 1,6,7,8, the near field antenna of a kind of couple feed formula and equipment thereof, its object is to solve the near-field communication function of communicating terminal all-metal bonnet.Couple feed formula near field antenna includes radio-frequency antenna radiant body and the grounding body separated by the first gap, and be arranged in parallel with radio-frequency antenna radiant body and there are the couple feed parts of certain distance, described couple feed parts have the RFID module filtering radiofrequency signal effect by the first isolation inductance connection of high q-factor, described couple feed formula near field antenna equipment is the communicating terminal being provided with couple feed formula near field antenna, and this equipment includes syllogic all-metal bonnet 1 and couple feed module 41.Wherein couple feed module 41 mainly comprises couple feed parts 411 and RFID module 412.The differential signal that RFID module 412 produces signal after overbalance-non-equilibrium conversion enters into couple feed parts 411 through the first isolation inductance L1, then enters mainboard stratum by the second isolation inductance L2, forms loop.And couple feed parts 411 couple the radio-frequency antenna radiant body 11 in all-metal bonnet 1, to realize the near field functional characteristic of metal back cover.
It is the present embodiment version of being used the syllogic communicating terminal of a kind of routine as shown in Figure 1, including syllogic metal back cover 1, communicating terminal mainboard 2 and display screen 3.
Fig. 6 is the present embodiment couple feed module 41 and the one of which structural representation of metal back cover 1 implementation.Syllogic metal back cover includes bonnet on the metal as radio-frequency antenna radiant body 11 and as the intermetallic metal lid 12 of grounding body 12 and lower bonnet, wherein radio-frequency antenna radiant body 11 is as radio frequency antenna element, it is commonly used to outside radiated electromagnetic wave, and intermetallic metal lid 12 uses usually used as shielding and heat radiation.There is one section of plastic cement first gap 13 between radio-frequency antenna radiant body 11 and intermetallic metal lid 12, the first gap width is typically between 1.5mm to 2.0mm.The main radiation component of couple feed module 41 i.e. couple feed parts 411 are placed in parallel with radiant body 11, and do not do directly contact.
Fig. 7 is the version of the present embodiment couple feed module.It mainly includes the couple feed parts 411 for coupling with radio-frequency antenna radiant body 11, and its material is metal；Also include that the high q-factor first being connected between couple feed parts 411 and RFID module isolates inductance L1, and the second isolation inductance L2 of the high q-factor being connected between couple feed parts and ground, the first isolation inductance L1 and the high-frequency signal acting as on isolation radiation component 11 of the second isolation inductance L2；Make high-frequency signal can not enter near field communication module, it is to avoid high-frequency signal brings noise to debugging and the transmission of near-field communication signal.
Fig. 8 is the RFID module electric connecting mode described in the present embodiment.Couple feed parts 411 are connected to isolate one end of inductance L1, simultaneously by the second isolation inductance L2 ground connection, the shunt capacitance Cp accessed for debugging coupling in parallel between the other end and the ground of L1, L1 connects access again for series capacitance Cs debugging coupling simultaneously, series capacitance Cs is linked into one of them the Low ESR port in balun device B, the Low ESR port ground connection of the other end.Two ports of the residue of balun device are linked into the LC low pass filter of difference, complete the conversion of non-equilibrium-balance, wherein low pass filter includes inductance L0 and electric capacity C0, one end of two electric capacity CO connects two ports of residue of balun device respectively, the other end all accesses ground, one end of two inductance L0 connects two ports of residue of balun device and connects, and the other end is all connected to the Tx end of RFID chip.
The present invention has abandoned the implementation of traditional power coil, and without doing design of specifically cracking in metal back cover.Additionally the present invention is without directly feeding on the metal radiation sheet of metal back cover, but utilizes the change of mainboard bottom to realize and the coupling of metal radiation sheet so that metallic terminations has the function of near-field communication.The present embodiment is on the basis of embodiment 1, and couple feed parts, also by the isolation inductance L2 ground connection of a high q-factor, further filter out high-frequency signal so that signal is cleaner.
nullSuch as Figure 10、Shown in 11，On the basis of conventional mainboard device layout, communicating terminal mainboard upper part is separated the feed stratum as couple feed parts and mainboard stratum by the second gap 24，And connect feed stratum as described above、First isolation inductance、Second isolation inductance and RFID module，For ensureing the reliable ground of the former radio-frequency antenna in communication stage casing，Do not affect the performance of radio-frequency antenna，Concatenate with high capacitance electric capacity C1 between radio-frequency antenna earth point 212 and feed stratum 22，Ensure that the stratum of high-frequency signal is complete simultaneously，Also concatenate with C1 between feed stratum 22 and mainboard stratum 23，The low frequency signal primarily serving the purpose of isolation near-field communication of C1 and conducting radio frequency signal，Use bottom the mainboard of communicating terminal, directly make design change，Reach the effect of near-field communication，Position process is kept away without imaging first-class device.
Embodiment
4
As it is shown in figure 9, be the present embodiment RFID module electric connecting mode, the present embodiment and embodiment 3 main difference is that what series capacitance Cs was connected with earth terminal is the high impedance port of balun device B.Remaining arranges same as in Example 3.
Being more than the wherein specific implementation of the present invention, it describes more concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these obvious alternative forms belong to protection scope of the present invention.
Claims (10)
1. a couple feed formula near field antenna, including radio-frequency antenna radiant body (11) and grounding body (12), it is provided with the first gap (13) between described radio-frequency antenna radiant body (11) and grounding body (12), it is characterized in that: also include couple feed module, described couple feed module be arranged in parallel with radio-frequency antenna radiant body, and is not directly contacted with.
Couple feed formula near field antenna the most according to claim 1, it is characterized in that: described couple feed module includes the couple feed parts (411) that one end does not contacts with radio-frequency antenna radiant body (11) and be arranged in parallel, the other end ground connection of couple feed parts (411) is also connected by the first isolation inductance L1 simultaneously and has the RFID module (412) filtering radiofrequency signal effect.
Couple feed formula near field antenna the most according to claim 2, it is characterised in that: described first isolation inductance L1 is that high q-factor isolates inductance.
Couple feed formula near field antenna the most according to claim 2, it is characterised in that: described couple feed parts (411) are by the second isolation inductance L2 ground connection.
Couple feed formula near field antenna the most according to claim 4, it is characterised in that: described second isolation inductance L2 is that high q-factor isolates inductance.
Couple feed formula near field antenna the most according to claim 2, it is characterized in that: described RFID module (412) includes balun device B, one end of balun device B electric capacity Cp in parallel and series capacitance Cs connect the first isolation inductance L1, and the other end connects radio frequency chip by LC low pass filter.
Couple feed formula near field antenna the most according to claim 6, it is characterized in that: first low-impedance end of described balun device B connects series capacitance Cs, first high impedance end ground connection, connect shunt capacitance Cp, the second low-impedance end and the second high impedance end between first low-impedance end and the first high impedance end and connect LC low pass filter.
Couple feed formula near field antenna the most according to claim 6, it is characterized in that: the first high impedance end of described balun device connects series capacitance Cs, second high impedance end ground connection, connect shunt capacitance Cp, the first low-impedance end and the second low-impedance end between first high impedance end and the second high impedance end and connect LC low pass filter.
9. a near-field communication device, it is characterized in that: include syllogic metal back cover (1) and communicating terminal mainboard (2), described syllogic metal back cover (1) includes bonnet on metal, intermetallic metal lid and lower bonnet, include bottom described communicating terminal mainboard feeding stratum (22) and mainboard stratum (23), described feed stratum (22) and mainboard stratum (23) are separated by the second gap (24), bonnet on described metal, intermetallic metal lid and feed stratum are respectively as the radio-frequency antenna radiant body (11) described in claim 2-8 any one, grounding body (12) and couple feed parts (411).
Near-field communication device the most according to claim 9, it is characterised in that: it is serially connected with multiple high capacitance electric capacity C1 between described feed stratum (22) and the radio-frequency antenna earth point of communicating terminal, between described feed stratum (22) and mainboard stratum (23).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610226126.XA CN105870626B (en) | 2016-04-13 | 2016-04-13 | Couple feed formula near field antenna and its equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610226126.XA CN105870626B (en) | 2016-04-13 | 2016-04-13 | Couple feed formula near field antenna and its equipment |
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| CN105870626A true CN105870626A (en) | 2016-08-17 |
| CN105870626B CN105870626B (en) | 2019-05-21 |
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| CN106486759A (en) * | 2016-09-26 | 2017-03-08 | 上海德门电子科技有限公司 | NFC structure based on metal shell and electronic equipment and using method |
| CN106602247A (en) * | 2016-12-26 | 2017-04-26 | 青岛海信移动通信技术股份有限公司 | Mobile terminal multi-frequency antenna and mobile terminal |
| CN108288753A (en) * | 2017-10-27 | 2018-07-17 | 珠海市魅族科技有限公司 | Antenna module and terminal device |
| CN109219331A (en) * | 2017-07-07 | 2019-01-15 | 广达电脑股份有限公司 | Electronic device |
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| CN112583959A (en) * | 2019-09-30 | 2021-03-30 | 华为技术有限公司 | Radio frequency cable and electronic equipment |
| CN113437512A (en) * | 2021-06-25 | 2021-09-24 | 歌尔科技有限公司 | Antenna device and portable electronic device |
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| CN105870626B (en) | 2019-05-21 |
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