CN103856231A - Near field communication (NFC) and frequency modulation (FM) antenna system - Google Patents

Near field communication (NFC) and frequency modulation (FM) antenna system Download PDF

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Publication number
CN103856231A
CN103856231A CN201210496844.0A CN201210496844A CN103856231A CN 103856231 A CN103856231 A CN 103856231A CN 201210496844 A CN201210496844 A CN 201210496844A CN 103856231 A CN103856231 A CN 103856231A
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CN
China
Prior art keywords
chip
antenna
nfc
electric capacity
pin
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Pending
Application number
CN201210496844.0A
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Chinese (zh)
Inventor
高愈昌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Futaihong Precision Industry Co Ltd
Chi Mei Communication Systems Inc
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Shenzhen Futaihong Precision Industry Co Ltd
Chi Mei Communication Systems Inc
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Publication date
Application filed by Shenzhen Futaihong Precision Industry Co Ltd, Chi Mei Communication Systems Inc filed Critical Shenzhen Futaihong Precision Industry Co Ltd
Priority to CN201210496844.0A priority Critical patent/CN103856231A/en
Publication of CN103856231A publication Critical patent/CN103856231A/en
Pending legal-status Critical Current

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Abstract

Disclosed is a near field communication (NFC) and frequency modulation (FM) antenna system which is applied to a portable electronic apparatus. The system comprises an antenna, an NFC chip, an FM chip, a master control chip, a common coupling module electrically connected with the antenna, a gating module electrically connected with the common coupling module and the master control chip, an NFC coupling module electrically connected between the gating module and the NFC chip, and an FM coupling module electrically connected between the gating module and the FM chip. The common coupling module is used for coupling the antenna to multiple frequency bands for sharing, the master control chip is used for sending a control signal to the gating module and controlling the gating module to conduct the antenna to the NFC coupling module and the NFC chip or conduct the antenna to the FM coupling module and the FM chip, when the antenna is conducted and connected to the NFC chip, the NFC coupling module is used for tuning to the work frequency of the NFC chip, and when the antenna is conducted and connected to the FM chip, the FM coupling module is used for tuning to the work frequency of the FM chip.

Description

Near-field communication and frequency modulation(FM) antenna system
Technical field
The present invention relates to a kind of portable electron device antenna system, relate in particular to a kind of can be by near-field communication and the shared antenna system of frequency modulation(FM).
Background technology
In portable electron device, be conventionally designed with frequency modulation function.In prior art, while realizing frequency modulation function, conventionally use the external earphone of portable electron device to double as warbled antenna.But, can make like this electronic installation user in the time of frequency of utilization modulation function, must plug in the earphone, this may bring the inconvenience in use to user.
Summary of the invention
In view of this, be necessary to provide a kind of near-field communication and the frequency modulation(FM) antenna system that can avoid using peripheral earphone.
A kind of near-field communication and frequency modulation(FM) antenna system, be applied to portable electron device, it comprises antenna, near-field communication (NFC) chip, frequency modulation(FM) (FM) chip and main control chip, be electrically connected to the shared matching module of antenna, be electrically connected to the gating module that shares matching module and main control chip, be electrically connected at the NFC matching module between gating module and NFC chip and be electrically connected at gating module and FM chip between FM matching module, share matching module for antenna match is extremely supplied to sharing of multiple frequency bands, main control chip is used for sending a control signal to gating module and controls gating module conducting antenna to NFC matching module and NFC chip, or conducting antenna is to FM matching module and FM chip, in the time that antenna conducting is connected to NFC chip, NFC matching module is for being tuned to the operating frequency of NFC chip, in the time that antenna conducting is connected to FM chip, FM matching module is for being tuned to the operating frequency of FM chip.
Described near-field communication and frequency modulation(FM) antenna system share matching module and gating module by arranging, and by main control chip control gating module, antenna conducting are connected to NFC chip or FM chip, make NFC chip and FM chip can share an antenna.Like this, this system is without using peripheral earphone just can realize frequency modulation function, user-friendly, also can save manufacturing cost.In addition, can pass through NFC matching module and the FM operating frequency to NFC chip and FM chip by antenna tuning respectively, while making NFC chip and FM chip apply antenna respectively, the signal of sending and receiving is more stable.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of preferred embodiment near-field communication of the present invention and frequency modulation(FM) antenna system.
Fig. 2 is the circuit diagram of preferred embodiment near-field communication of the present invention and frequency modulation(FM) antenna system.
Main element symbol description
Near-field communication and frequency modulation(FM) antenna system 100
Antenna 10
Share matching module 20
Gating module 30
NFC matching module 40
FM matching module 50
NFC chip 60
FM chip 70
Main control chip 80
Electric capacity C1~C9
Inductance L1~L5
Resistance R1
Pin P1~P15
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
The near-field communication of the present embodiment preferred embodiments and frequency modulation(FM) antenna system can be applicable in a portable electron device.This portable electron device can be mobile phone, personal digital assistant (Personal Digital Assistance, and palmtop PC etc. PDA), and possesses near-field communication (Near Field Communication simultaneously, NFC) function and frequency modulation(FM) (Frequency Modulation, FM) function.
Refer to Fig. 1, the near-field communication of this example preferred embodiments and frequency modulation(FM) antenna system 100 comprise antenna 10, share matching module 20, gating module 30, NFC matching module 40, FM matching module 50, NFC chip 60, FM chip 70 and main control chip 80.Antenna 10 can be the plane coiled wire-wound coil being installed in portable electron device.Share matching module 20 and be electrically connected to antenna 10, share for antenna 10 being matched to for multiple frequency bands.Gating module 30 is electrically connected to and shares matching module 20, NFC matching module 40 and FM matching module 50, and NFC matching module 40 is electrically connected to NFC chip 60, and FM matching module 50 is electrically connected to FM chip 70.Gating module 30 is for selecting to connect antenna 10 to NFC chips 60 or FM chip 70.Gating module 30 can be antenna multicoupler or single-pole double-throw switch (SPDT) etc., in the present embodiment, is preferably antenna multicoupler.NFC matching module 40 is for NFC chip 60 is matched to antenna 10, and FM matching module 50 is for being matched to antenna 10 by FM chip 70.Main control chip 80 is electrically connected to gating module 30, is used to gating module 30 to power and for controlling the selection conduction status of gating module 30.In the present embodiment, main control chip 80 can be the central processing unit (Central Processing Unit, CPU) of portable electron device.
See also Fig. 1 and Fig. 2, the feeder line end of antenna 10 is electrically connected to and shares matching module 20.Share matching module 20 and comprise the multiple electric capacity that are electrically connected successively, wherein the first capacitor C 1 and the second capacitor C 2 are electrically connected to respectively two feeder line ends of antenna 10.The 3rd capacitor C 3 and the 4th capacitor C 4 are connected in series, and are connected to ground between the 3rd capacitor C 3 and the 4th capacitor C 4.The 3rd capacitor C 3 is also connected between a feeder line end of the first capacitor C 1 and antenna 10, and the 4th capacitor C 4 is also connected between another feeder line end of the second capacitor C 2 and antenna 10.The 5th capacitor C 5 and the 6th capacitor C 6 are connected in series, and are connected to ground between the 5th capacitor C 5 and the 6th capacitor C 6.The 5th capacitor C 5 is electrically connected to one end that the first capacitor C 1 does not connect the feeder line end of antenna 10, and the 6th capacitor C 6 is electrically connected to one end that the second capacitor C 2 does not connect the feeder line end of antenna 10.
Gating module 30 can be antenna duplexer chip, and it comprises 15 pins.Wherein the 7th pin P7 and the 8th pin P8 are electrically connected to main control chip 80, the 7th pin is power pins, for obtain the working power of gating module 30 from main control chip 80, the 8th pin P8 is for controlling pin, for obtaining control signal from main control chip 80 to control the conducting state of gating module 30.The tenth pin P10 and the 11 pin P11 are electrically connected to respectively the second capacitor C 2 and the first capacitor C 1, the signal input pin that these two pins are gating module 30.The second pin P2 and the 14 pin P14 are electrically connected to NFC matching module 40, the three pin P3 and are electrically connected to FM matching module 50, the signal output pin that these three pins are gating module 30.The first pin P1, the 4th pin P4, the 5th pin P5, the 6th pin P6, the 9th pin P9, the 12 pin P12, the 13 pin P13 and the 15 pin P15 ground connection.
The framework of the framework of NFC matching module 40 and shared matching module 20 is roughly the same, NFC matching module 40 is compared shared matching module 20 and is further comprised the first inductance L 1 and the second inductance L 2, is electrically connected to respectively electric capacity and the NFC chip 60 of NFC matching module 40.In the time that NFC chip 60 is switched on to antenna 10, NFC matching module 40 is for NFC chip 60 is matched to antenna 10, and realizes the tuning of NFC, and NFC is operated near frequency 13.56MHz.
FM matching module 50 comprises the 3rd inductance L 3 and the 4th inductance L 4 of serial connection, and is electrically connected to the 7th capacitor C 7 between gating module 30 the 3rd pin P3 and the 3rd inductance L 3, is electrically connected to the 8th capacitor C 8 between the 3rd inductance L 3 and the 4th inductance L 4.The 3rd inductance L 3 one end are electrically connected to gating module 30 the 3rd pin P3, and the 4th inductance L 4 one end are electrically connected to the other end ground connection of FM chip 70, the seven capacitor C 7 and the 8th capacitor C 8.In the time that FM matching module 50 is switched on to antenna 10, FM matching module 50 is for FM chip 70 is matched to antenna 10, and realizes the tuning of FM, makes FM be operated in the frequency band of 88MHz ~ 108MHz.
Main control chip 80 is electrically connected to the 7th pin P7 of gating module 30 by resistance R 1, be also connected with the 9th capacitor C 9, the nine capacitor C 9 other end ground connection between resistance R 1 and the 7th pin P7.Main control chip 80 provides working power by the 7th pin P7 to gating module 30.Main control chip 80 is also electrically connected to gating module 30 the 8th pin P8, and main control chip 80 is controlled the conducting state of gating module 30 by transmitting control signal to the 8th pin P8.In the time that main control chip 80 sends a low level signal to the 8th pin P8, the 11 pin P11 conducting to the 14 pin P14 of gating module 30, the tenth pin P10 conducting to the second pin P2, thus make antenna 10 conductings to NFC matching module 40 and NFC chip 60.Now, NFC chip 60 and antenna 10 are tuned to its operating frequency by NFC matching module 40, can be used for the wireless near field communication such as non-contact IC card or non-contact IC card reader.In the time that main control chip 80 sends a high level signal to the 8th pin P8, the 11 pin P10 conducting to the three pin P3 of gating module 30, the tenth pin P10 conducting to the five pin P5 and ground connection, thus make antenna 10 conductings to FM matching module 50 and FM chip 70.Now, FM chip 70 and antenna 10 are tuned to its operating frequency range by FM matching module 50, can be used for receiving digital broadcast signal.
Described near-field communication and frequency modulation(FM) antenna system 100 share matching module 20 and gating module 30 by arranging, and control gating module 30 by main control chip 80 antenna 10 conductings are connected to NFC chip 60 or FM chip 70, make NFC chip 60 and FM chip 70 can share an antenna 10.Like this, this near-field communication and frequency modulation(FM) antenna system 100 are without using peripheral earphone just can realize frequency modulation function, user-friendly, also can save manufacturing cost.In addition, can be tuned to respectively by NFC matching module 40 and FM matching module 50 operating frequency of NFC chip 60 and FM chip 70, while making NFC chip 60 and FM chip 70 apply antenna 10 respectively, the signal of sending and receiving is more stable.

Claims (10)

1. a near-field communication and frequency modulation(FM) antenna system, be applied to portable electron device, it comprises antenna, near-field communication (NFC) chip, frequency modulation(FM) (FM) chip and main control chip, it is characterized in that: described near-field communication and frequency modulation(FM) antenna system also comprise the shared matching module that is electrically connected to antenna, be electrically connected to the gating module that shares matching module and main control chip, be electrically connected at the NFC matching module between gating module and NFC chip and be electrically connected at gating module and FM chip between FM matching module, share matching module for antenna match is extremely supplied to sharing of multiple frequency bands, main control chip is used for sending a control signal to gating module and controls gating module conducting antenna to NFC matching module and NFC chip, or conducting antenna is to FM matching module and FM chip, in the time that antenna conducting is connected to NFC chip, NFC matching module is for being tuned to the operating frequency of NFC chip, in the time that antenna conducting is connected to FM chip, FM matching module is for being tuned to the operating frequency of FM chip.
2. near-field communication as claimed in claim 1 and frequency modulation(FM) antenna system, is characterized in that: the central processing unit that described main control chip is portable electron device.
3. near-field communication as claimed in claim 2 and frequency modulation(FM) antenna system, is characterized in that: described gating module is antenna multicoupler or single-pole double-throw switch (SPDT).
4. near-field communication as claimed in claim 3 and frequency modulation(FM) antenna system, it is characterized in that: described gating module comprises multiple pins, wherein the 7th pin and the 8th pin are electrically connected to main control chip, obtain working power and control signal from main control chip respectively, the tenth pin and the 11 pin are electrically connected to shared matching module, the second pin and the 13 pin are electrically connected to NFC matching module, and the 3rd pin is electrically connected to FM matching module, all the other pin ground connection.
5. near-field communication as claimed in claim 4 and frequency modulation(FM) antenna system, it is characterized in that: the 7th pin of gating module is electrically connected to main control chip by a resistance, between this pin and resistance, be also electrically connected to one end of an electric capacity, and this electric capacity other end ground connection.
6. near-field communication as claimed in claim 4 and frequency modulation(FM) antenna system, it is characterized in that: in the time that main control chip sends low level signal to gating module, the 11 pin conducting to the 13 pins of gating module, the tenth pin conducting to the second pin, so that Anneta module conducting is to NFC chip; In the time that main control chip sends high level signal to gating module, the 11 pin conducting to the three pins of gating module, the tenth pin conducting is to ground, so that Anneta module conducting is to FM chip.
7. near-field communication as claimed in claim 1 and frequency modulation(FM) antenna system, is characterized in that: described antenna is the plane coiled wire-wound coil being installed in portable electron device.
8. near-field communication as claimed in claim 1 and frequency modulation(FM) antenna system, it is characterized in that: described shared matching module comprises multiple electric capacity, wherein the first electric capacity and the second electric capacity are electrically connected to respectively two feeder line ends of antenna, the 3rd electric capacity and the 4th capacitances in series connect, and between the 3rd electric capacity and the 4th electric capacity, be connected to ground, the 3rd electric capacity is also connected between a feeder line end of the first electric capacity and antenna, the 4th electric capacity is also connected between another feeder line end of the second electric capacity and antenna, the 5th electric capacity is connected with the 6th capacitances in series, and between the 5th electric capacity and the 6th electric capacity, be connected to ground, the 5th electric capacity is electrically connected to one end that the first electric capacity does not connect the feeder line end of antenna, the 6th electric capacity is electrically connected to one end that the second electric capacity does not connect the feeder line end of antenna.
9. near-field communication as claimed in claim 8 and frequency modulation(FM) antenna system, is characterized in that: described NFC matching module comprises shared matching module circuit framework and two inductance, and two inductance are electrically connected to respectively NFC chip.
10. near-field communication as claimed in claim 1 and frequency modulation(FM) antenna system, it is characterized in that: described FM matching module comprises two inductance that are serially connected with between FM chip and gating module and is electrically connected to two electric capacity between two inductance and between inductance and FM chip with one end respectively, the equal ground connection of the other end of these two electric capacity.
CN201210496844.0A 2012-11-29 2012-11-29 Near field communication (NFC) and frequency modulation (FM) antenna system Pending CN103856231A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210496844.0A CN103856231A (en) 2012-11-29 2012-11-29 Near field communication (NFC) and frequency modulation (FM) antenna system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210496844.0A CN103856231A (en) 2012-11-29 2012-11-29 Near field communication (NFC) and frequency modulation (FM) antenna system

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CN103856231A true CN103856231A (en) 2014-06-11

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107659342A (en) * 2017-10-11 2018-02-02 深圳市金立通信设备有限公司 A kind of near-field communication NFC circuit and terminal
CN107707265A (en) * 2017-10-26 2018-02-16 浙江威星智能仪表股份有限公司 A kind of dual communication chip shares single antenna
CN108649706A (en) * 2018-04-26 2018-10-12 Oppo广东移动通信有限公司 A kind of wireless charging circuit and wearable device
CN109217904A (en) * 2018-11-20 2019-01-15 漳州高新区远见产业技术研究有限公司 A kind of near field communication means

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107659342A (en) * 2017-10-11 2018-02-02 深圳市金立通信设备有限公司 A kind of near-field communication NFC circuit and terminal
CN107707265A (en) * 2017-10-26 2018-02-16 浙江威星智能仪表股份有限公司 A kind of dual communication chip shares single antenna
CN108649706A (en) * 2018-04-26 2018-10-12 Oppo广东移动通信有限公司 A kind of wireless charging circuit and wearable device
CN108649706B (en) * 2018-04-26 2021-10-22 Oppo广东移动通信有限公司 Wireless charging circuit and wearable equipment
CN109217904A (en) * 2018-11-20 2019-01-15 漳州高新区远见产业技术研究有限公司 A kind of near field communication means

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Application publication date: 20140611

RJ01 Rejection of invention patent application after publication