CN109782302A - A kind of built-in antenna of satellite positioning communication terminal and external automatic switching control equipment - Google Patents
A kind of built-in antenna of satellite positioning communication terminal and external automatic switching control equipment Download PDFInfo
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- CN109782302A CN109782302A CN201910087421.5A CN201910087421A CN109782302A CN 109782302 A CN109782302 A CN 109782302A CN 201910087421 A CN201910087421 A CN 201910087421A CN 109782302 A CN109782302 A CN 109782302A
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Abstract
The invention discloses a kind of built-in antennas of satellite positioning communication terminal and external automatic switching control equipment, it include: channel switching module, the external antenna interface and internal antenna module being connected respectively with the first input end of channel switching module and the second input terminal, the locating module being connected with the output end of channel switching module, and the external antenna detection module being connected between external antenna interface and channel switching module；External antenna interface is for connecting external antenna；External antenna detection module is for detecting whether external antenna interface is connected with external antenna；When external antenna detection module detects that external antenna interface is connected with external antenna, channel switching module, which switches to, is connected external antenna with locating module, and otherwise channel switching module, which switches to, is connected internal antenna module with locating module.Its communication need for being suitable for different occasions, the communication antenna of communication terminal product can not only have been supported built-in simultaneously but also compatible external.
Description
Technical field
The invention belongs to the antenna design techniques fields of satellite positioning communication terminal, and in particular to a kind of satellite positioning communication
The built-in antenna of terminal and external automatic switching control equipment.
Background technique
Most of communicating terminal all uses built-in antenna design in order to beautiful at present, and built-in antenna is to communication signal
Be affected, may be only available for the use in small area.In order to reach and the consistent mesh of the using effect of external antenna
, it can be higher to the design requirement of host computer communication, while will increase the cost of research and development, test, manufacture.Current most manufacturer
In order to solve the demand of different user, 2 kinds of specifications i.e. built-in antenna version and external antenna version, i.e., every money will be made into a product
Product will prepare 2 kinds of versions, increase more costs in process of production.
Summary of the invention
In order to solve the above problems existing in the present technology, it is an object of that present invention to provide a kind of satellite positioning communication terminals
Built-in antenna and external automatic switching control equipment.
The technical scheme adopted by the invention is as follows: a kind of built-in antenna of satellite positioning communication terminal and external automatic switchover
Device, comprising: channel switching module, the external day being connected respectively with the first input end of channel switching module and the second input terminal
Line interface and internal antenna module, the locating module being connected with the output end of channel switching module, and it is connected to external day
External antenna detection module between line interface and channel switching module；External antenna interface is for connecting external antenna；It is external
Antenna detection module is for detecting whether external antenna interface is connected with external antenna；Channel switching module is for selecting switching work
Operation mode, when external antenna detection module detects that external antenna interface is connected with external antenna, channel switching module switching
To external antenna is connected with locating module, otherwise channel switching module, which switches to, leads internal antenna module with locating module
It is logical.
Optionally, the channel switching module includes chip NLASB3157 and channels peripheral circuit, channels peripheral circuit
Including triode Q1 and it is connected to the collector of triode Q1 and the resistance R2 of base stage and resistance R3, the hair of triode Q1
Emitter grounding；The pin S of chip NLASB3157 is connected with the collector of triode Q1, pin B0, B1 of chip NLASB3157
With A respectively as the first input end, the second input terminal and output end of channel switching module.
Optionally, the external antenna interface be SMA interface, UFL interface, IPEX interface, IPX interface, MMCX interface or
FAKRA interface.
Optionally, the external antenna detection module includes triode Q2 and triode Q3；The emitter of triode Q2 with
Resistance R5 and resistance R4 are in series between the emitter of triode Q3, resistance R4 is parallel with capacitor C7；The collector of triode Q2
Resistance R8 and resistance R9, the intermediate node ground connection of resistance R8 and resistance R9 are in series between the collector of triode Q3；Triode
The emitter of Q3 is in series with resistance R6 and resistance R7, one end ground connection of resistance R7；The emitter of triode Q3 is in series with inductance L2
It is grounded with one end of capacitor C6, capacitor C6；The collector of triode Q3 is in series with resistance R10.
Optionally, the external antenna interface is equipped with pin 1 and pin 2, and pin 2 is grounded, the pin 1 of external antenna interface
It is connected with first node, node of the first node between the inductance L2 and capacitor C6；And the pin 1 of external antenna interface with
The first input end of the channel switching module is connected.
Optionally, the internal antenna module includes radio-frequency antenna RF and radio frequency amplifier, and radio-frequency antenna RF is put with radio frequency
Capacitor C5 and inductance L1, the second input terminal of the output end of radio frequency amplifier and the channel switching module are connected between big device
It is connected.
Optionally, the radio frequency amplifier is chip AT2659S.
Optionally, the locating module is Beidou/GPS dual-mode navigation module.
Optionally, the locating module includes chip ATGM336H and ground positioning peripheral circuit；Position peripheral circuit packet
Include zener diode D1, zener diode D2, capacitor C4, power supply BT1, resistance R1 and capacitor C2；Zener diode D1 and capacitor
It is connected after C4 series connection with the pin GND of chip ATGM336H, zener diode D2 and power supply BT1 are series at chip ATGM336H's
Between pin VBAT and DND, and second node is connected with third node, and second node is between zener diode D1 and capacitor C4
Node, node of the third node between zener diode D2 and the pin VBAT of chip ATGM336H；Resistance R1 is series at
Between the pin nRESET and pin VCC of ATGM336H；Capacitor C2 is connected with the pin VCC_RF of ATGM336H, and capacitor C2
One end ground connection.
The invention has the benefit that, for the communication need for adapting to different occasions, communication terminal product leads in the present invention
Iflytech's line can not only support it is built-in with it is simultaneously but also compatible external, by the detection of the load to external antenna, and then detection is sentenced
It is disconnected that currently either with or without external antenna, if detect that external antenna is plugged, operating mode automatically switches to external antenna mode,
If removing external antenna, it is immediately switched to built-in antenna mode, to realize automatic switchover operating mode；Enterprise is produced
Stock provides extremely convenient selection, as client needs external antenna version, it is only necessary to the accessory of an external antenna is bought, and
Without separately purchasing the version of external antenna；For manufacturer, in order to meet different demands, it is only necessary to which a product simultaneously passes through increase
External accessory can solve to need to prepare a plurality of products originally to deal with the demand of different user.
Detailed description of the invention
Fig. 1 is the circuit diagram of the present embodiment.
Fig. 2 is the circuit structure diagram of channel switching module.
Fig. 3 is the circuit structure diagram of external antenna detection module.
Fig. 4 is the circuit structure diagram of external antenna interface.
Fig. 5 is the circuit structure diagram of internal antenna module.
Fig. 6 is the circuit structure diagram of locating module.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.Therefore, below to the reality of the invention provided in the accompanying drawings
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
In the description of the embodiment of the present invention, it is to be understood that term " on ", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as "bottom", " side " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore should not be understood as the limitation to the present embodiment.
In the description of the embodiment of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term
" setting ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to detachably connect
It connects, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediate matchmaker can also be passed through
Jie is indirectly connected, and can be the connection inside two elements.For the ordinary skill in the art, specific feelings can be regarded
Condition understands the concrete meaning of above-mentioned term in the present invention.
With reference to the accompanying drawing and specific embodiment the present invention is further elaborated.
Embodiment 1:
As shown in Figure 1, a kind of built-in antenna of satellite positioning communication terminal and external automatic switching control equipment, comprising: channel
Switching module, the external antenna interface being connected respectively with the first input end of channel switching module and the second input terminal and inside
Anneta module, the locating module being connected with the output end of channel switching module, and be connected to external antenna interface and cut with channel
Change the mold the external antenna detection module between block；External antenna interface is for connecting external antenna；External antenna detection module is used
Whether external antenna is connected in detection external antenna interface；Channel switching module works as outside for selecting switching working mode
When antenna detection module detects that external antenna interface is connected with external antenna, channel switching module switch to make external antenna with
Locating module conducting, otherwise channel switching module, which switches to, is connected internal antenna module with locating module.
In the present embodiment, for the communication need for adapting to different occasions, the communication antenna of communication terminal product can both be supported
It is built-in with it is again compatible external simultaneously, by the detection of the load to external antenna, and then detect and judge currently either with or without external
Antenna, if detect that external antenna is plugged, operating mode automatically switches to external antenna mode, if removing external day
Line is immediately switched to built-in antenna mode, to realize automatic switchover operating mode；It is extremely square that stock offer is produced for enterprise
Just selection, as client needs external antenna version, it is only necessary to the accessory for buying an external antenna, without separately purchasing external day
The version of line；For manufacturer, in order to meet different demands, it is only necessary to which a product simultaneously passes through the external accessory of increase
It solves to need to prepare a plurality of products originally to deal with the demand of different user.
Embodiment 2:
As shown in Figure 1, a kind of built-in antenna of satellite positioning communication terminal and external automatic switching control equipment, comprising: channel
Switching module, the external antenna interface being connected respectively with the first input end of channel switching module and the second input terminal and inside
Anneta module, the locating module being connected with the output end of channel switching module, and be connected to external antenna interface and cut with channel
Change the mold the external antenna detection module between block；External antenna interface is for connecting external antenna；External antenna detection module is used
Whether external antenna is connected in detection external antenna interface；Channel switching module works as outside for selecting switching working mode
When antenna detection module detects that external antenna interface is connected with external antenna, channel switching module switch to make external antenna with
Locating module conducting, otherwise channel switching module, which switches to, is connected internal antenna module with locating module.
In the present embodiment, for the communication need for adapting to different occasions, the communication antenna of communication terminal product can both be supported
It is built-in with it is again compatible external simultaneously, by the detection of the load to external antenna, and then detect and judge currently either with or without external
Antenna, if detect that external antenna is plugged, operating mode automatically switches to external antenna mode, if removing external day
Line is immediately switched to built-in antenna mode, to realize automatic switchover operating mode；It is extremely square that stock offer is produced for enterprise
Just selection, as client needs external antenna version, it is only necessary to the accessory for buying an external antenna, without separately purchasing external day
The version of line；For manufacturer, in order to meet different demands, it is only necessary to which a product simultaneously passes through the external accessory of increase
It solves to need to prepare a plurality of products originally to deal with the demand of different user.
Specifically, as shown in Fig. 2, the channel switching module includes chip NLASB3157 and channels peripheral circuit, lead to
Road peripheral circuit includes the resistance R2 and resistance R3 of triode Q1 and the collector for being connected to triode Q1 and base stage, and three
The emitter of pole pipe Q1 is grounded；The pin S of chip NLASB3157 is connected with the collector of triode Q1, chip NLASB3157's
The first input end, the second input terminal and output end of pin B0, B1 and A respectively as channel switching module.
Embodiment 3:
As shown in Figure 1, a kind of built-in antenna of satellite positioning communication terminal and external automatic switching control equipment, comprising: channel
Switching module, the external antenna interface being connected respectively with the first input end of channel switching module and the second input terminal and inside
Anneta module, the locating module being connected with the output end of channel switching module, and be connected to external antenna interface and cut with channel
Change the mold the external antenna detection module between block；External antenna interface is for connecting external antenna；External antenna detection module is used
Whether external antenna is connected in detection external antenna interface；Channel switching module works as outside for selecting switching working mode
When antenna detection module detects that external antenna interface is connected with external antenna, channel switching module switch to make external antenna with
Locating module conducting, otherwise channel switching module, which switches to, is connected internal antenna module with locating module.
In the present embodiment, for the communication need for adapting to different occasions, the communication antenna of communication terminal product can both be supported
It is built-in with it is again compatible external simultaneously, by the detection of the load to external antenna, and then detect and judge currently either with or without external
Antenna, if detect that external antenna is plugged, operating mode automatically switches to external antenna mode, if removing external day
Line is immediately switched to built-in antenna mode, to realize automatic switchover operating mode；It is extremely square that stock offer is produced for enterprise
Just selection, as client needs external antenna version, it is only necessary to the accessory for buying an external antenna, without separately purchasing external day
The version of line；For manufacturer, in order to meet different demands, it is only necessary to which a product simultaneously passes through the external accessory of increase
It solves to need to prepare a plurality of products originally to deal with the demand of different user.
Specifically, as shown in Fig. 2, the channel switching module includes chip NLASB3157 and channels peripheral circuit, lead to
Road peripheral circuit includes the resistance R2 and resistance R3 of triode Q1 and the collector for being connected to triode Q1 and base stage, and three
The emitter of pole pipe Q1 is grounded；The pin S of chip NLASB3157 is connected with the collector of triode Q1, chip NLASB3157's
The first input end, the second input terminal and output end of pin B0, B1 and A respectively as channel switching module.
Specifically, the external antenna interface be SMA interface, UFL interface, IPEX interface, IPX interface, MMCX interface or
FAKRA interface.
Embodiment 4:
As shown in Figure 1, a kind of built-in antenna of satellite positioning communication terminal and external automatic switching control equipment, comprising: channel
Switching module, the external antenna interface being connected respectively with the first input end of channel switching module and the second input terminal and inside
Anneta module, the locating module being connected with the output end of channel switching module, and be connected to external antenna interface and cut with channel
Change the mold the external antenna detection module between block；External antenna interface is for connecting external antenna；External antenna detection module is used
Whether external antenna is connected in detection external antenna interface；Channel switching module works as outside for selecting switching working mode
When antenna detection module detects that external antenna interface is connected with external antenna, channel switching module switch to make external antenna with
Locating module conducting, otherwise channel switching module, which switches to, is connected internal antenna module with locating module.
In the present embodiment, for the communication need for adapting to different occasions, the communication antenna of communication terminal product can both be supported
It is built-in with it is again compatible external simultaneously, by the detection of the load to external antenna, and then detect and judge currently either with or without external
Antenna, if detect that external antenna is plugged, operating mode automatically switches to external antenna mode, if removing external day
Line is immediately switched to built-in antenna mode, to realize automatic switchover operating mode；It is extremely square that stock offer is produced for enterprise
Just selection, as client needs external antenna version, it is only necessary to the accessory for buying an external antenna, without separately purchasing external day
The version of line；For manufacturer, in order to meet different demands, it is only necessary to which a product simultaneously passes through the external accessory of increase
It solves to need to prepare a plurality of products originally to deal with the demand of different user.
Specifically, as shown in Fig. 2, the channel switching module includes chip NLASB3157 and channels peripheral circuit, lead to
Road peripheral circuit includes the resistance R2 and resistance R3 of triode Q1 and the collector for being connected to triode Q1 and base stage, and three
The emitter of pole pipe Q1 is grounded；The pin S of chip NLASB3157 is connected with the collector of triode Q1, chip NLASB3157's
The first input end, the second input terminal and output end of pin B0, B1 and A respectively as channel switching module.
Specifically, the external antenna interface be SMA interface, UFL interface, IPEX interface, IPX interface, MMCX interface or
FAKRA interface.
Specifically, as shown in figure 3, the external antenna detection module includes triode Q2 and triode Q3；Triode Q2
Emitter and triode Q3 emitter between be in series with resistance R5 and resistance R4, resistance R4 is parallel with capacitor C7；Triode
It is in series with resistance R8 and resistance R9 between the collector of Q2 and the collector of triode Q3, the intermediate node of resistance R8 and resistance R9 connect
Ground；The emitter of triode Q3 is in series with resistance R6 and resistance R7, one end ground connection of resistance R7；The emitter of triode Q3 is connected
There are inductance L2 and capacitor C6, one end ground connection of capacitor C6；The collector of triode Q3 is in series with resistance R10.
When work, using the opening of two signal detection external antennas of OPEN and SHORT, short circuit, detection circuit and external day
The power supply of line power supply is provided by module VCC RF, and the voltage value of two signals of OPEN and SHORT under various regimes is as follows:
| Signal | It works normally | Open circuit | Short circuit |
| SHORT | 2.9V | 3.3V | 0V |
| OPEN | 0V | 2.8V | 0V |
The voltage value of system detection SHORT and OPEN signal come determine external antenna either with or without connect or be connection be
It is no normal.If the system detects that SHORT is 2.9V and when OPEN is 0V can be determined that external antenna has connected, and working properly
It can switch over, when RF ENT high level can switch over.
Embodiment 5:
As shown in Figure 1, a kind of built-in antenna of satellite positioning communication terminal and external automatic switching control equipment, comprising: channel
Switching module, the external antenna interface being connected respectively with the first input end of channel switching module and the second input terminal and inside
Anneta module, the locating module being connected with the output end of channel switching module, and be connected to external antenna interface and cut with channel
Change the mold the external antenna detection module between block；External antenna interface is for connecting external antenna；External antenna detection module is used
Whether external antenna is connected in detection external antenna interface；Channel switching module works as outside for selecting switching working mode
When antenna detection module detects that external antenna interface is connected with external antenna, channel switching module switch to make external antenna with
Locating module conducting, otherwise channel switching module, which switches to, is connected internal antenna module with locating module.
In the present embodiment, for the communication need for adapting to different occasions, the communication antenna of communication terminal product can both be supported
It is built-in with it is again compatible external simultaneously, by the detection of the load to external antenna, and then detect and judge currently either with or without external
Antenna, if detect that external antenna is plugged, operating mode automatically switches to external antenna mode, if removing external day
Line is immediately switched to built-in antenna mode, to realize automatic switchover operating mode；It is extremely square that stock offer is produced for enterprise
Just selection, as client needs external antenna version, it is only necessary to the accessory for buying an external antenna, without separately purchasing external day
The version of line；For manufacturer, in order to meet different demands, it is only necessary to which a product simultaneously passes through the external accessory of increase
It solves to need to prepare a plurality of products originally to deal with the demand of different user.
Specifically, as shown in Fig. 2, the channel switching module includes chip NLASB3157 and channels peripheral circuit, lead to
Road peripheral circuit includes the resistance R2 and resistance R3 of triode Q1 and the collector for being connected to triode Q1 and base stage, and three
The emitter of pole pipe Q1 is grounded；The pin S of chip NLASB3157 is connected with the collector of triode Q1, chip NLASB3157's
The first input end, the second input terminal and output end of pin B0, B1 and A respectively as channel switching module.
Specifically, the external antenna interface be SMA interface, UFL interface, IPEX interface, IPX interface, MMCX interface or
FAKRA interface.
Specifically, as shown in figure 3, the external antenna detection module includes triode Q2 and triode Q3；Triode Q2
Emitter and triode Q3 emitter between be in series with resistance R5 and resistance R4, resistance R4 is parallel with capacitor C7；Triode
It is in series with resistance R8 and resistance R9 between the collector of Q2 and the collector of triode Q3, the intermediate node of resistance R8 and resistance R9 connect
Ground；The emitter of triode Q3 is in series with resistance R6 and resistance R7, one end ground connection of resistance R7；The emitter of triode Q3 is connected
There are inductance L2 and capacitor C6, one end ground connection of capacitor C6；The collector of triode Q3 is in series with resistance R10.
When work, using the opening of two signal detection external antennas of OPEN and SHORT, short circuit, detection circuit and external day
The power supply of line power supply is provided by module VCC RF, and the voltage value of two signals of OPEN and SHORT under various regimes is as follows:
| Signal | It works normally | Open circuit | Short circuit |
| SHORT | 2.9V | 3.3V | 0V |
| OPEN | 0V | 2.8V | 0V |
The voltage value of system detection SHORT and OPEN signal come determine external antenna either with or without connect or be connection be
It is no normal.If the system detects that SHORT is 2.9V and when OPEN is 0V can be determined that external antenna has connected, and working properly
It can switch over, when RF ENT high level can switch over.
Specifically, as shown in figure 4, the external antenna interface is equipped with pin 1 and pin 2, pin 2 is grounded, external antenna
The pin 1 of interface is connected with first node, node of the first node between the inductance L2 and capacitor C6；And external antenna connects
The pin 1 of mouth is connected with the first input end of the channel switching module.
Specifically, as shown in figure 5, the internal antenna module includes radio-frequency antenna RF and radio frequency amplifier, radio-frequency antenna
Capacitor C5 and inductance L1, the output end of radio frequency amplifier and the channel switching module are connected between RF and radio frequency amplifier
Second input terminal is connected.The radio frequency amplifier is chip AT2659S.
Embodiment 6:
As shown in Figure 1, a kind of built-in antenna of satellite positioning communication terminal and external automatic switching control equipment, comprising: channel
Switching module, the external antenna interface being connected respectively with the first input end of channel switching module and the second input terminal and inside
Anneta module, the locating module being connected with the output end of channel switching module, and be connected to external antenna interface and cut with channel
Change the mold the external antenna detection module between block；External antenna interface is for connecting external antenna；External antenna detection module is used
Whether external antenna is connected in detection external antenna interface；Channel switching module works as outside for selecting switching working mode
When antenna detection module detects that external antenna interface is connected with external antenna, channel switching module switch to make external antenna with
Locating module conducting, otherwise channel switching module, which switches to, is connected internal antenna module with locating module.
In the present embodiment, for the communication need for adapting to different occasions, the communication antenna of communication terminal product can both be supported
It is built-in with it is again compatible external simultaneously, by the detection of the load to external antenna, and then detect and judge currently either with or without external
Antenna, if detect that external antenna is plugged, operating mode automatically switches to external antenna mode, if removing external day
Line is immediately switched to built-in antenna mode, to realize automatic switchover operating mode；It is extremely square that stock offer is produced for enterprise
Just selection, as client needs external antenna version, it is only necessary to the accessory for buying an external antenna, without separately purchasing external day
The version of line；For manufacturer, in order to meet different demands, it is only necessary to which a product simultaneously passes through the external accessory of increase
It solves to need to prepare a plurality of products originally to deal with the demand of different user.
Specifically, as shown in Fig. 2, the channel switching module includes chip NLASB3157 and channels peripheral circuit, lead to
Road peripheral circuit includes the resistance R2 and resistance R3 of triode Q1 and the collector for being connected to triode Q1 and base stage, and three
The emitter of pole pipe Q1 is grounded；The pin S of chip NLASB3157 is connected with the collector of triode Q1, chip NLASB3157's
The first input end, the second input terminal and output end of pin B0, B1 and A respectively as channel switching module.
Specifically, the external antenna interface be SMA interface, UFL interface, IPEX interface, IPX interface, MMCX interface or
FAKRA interface.
Specifically, as shown in figure 3, the external antenna detection module includes triode Q2 and triode Q3；Triode Q2
Emitter and triode Q3 emitter between be in series with resistance R5 and resistance R4, resistance R4 is parallel with capacitor C7；Triode
It is in series with resistance R8 and resistance R9 between the collector of Q2 and the collector of triode Q3, the intermediate node of resistance R8 and resistance R9 connect
Ground；The emitter of triode Q3 is in series with resistance R6 and resistance R7, one end ground connection of resistance R7；The emitter of triode Q3 is connected
There are inductance L2 and capacitor C6, one end ground connection of capacitor C6；The collector of triode Q3 is in series with resistance R10.
When work, using the opening of two signal detection external antennas of OPEN and SHORT, short circuit, detection circuit and external day
The power supply of line power supply is provided by module VCC RF, and the voltage value of two signals of OPEN and SHORT under various regimes is as follows:
| Signal | It works normally | Open circuit | Short circuit |
| SHORT | 2.9V | 3.3V | 0V |
| OPEN | 0V | 2.8V | 0V |
The voltage value of system detection SHORT and OPEN signal come determine external antenna either with or without connect or be connection be
It is no normal.If the system detects that SHORT is 2.9V and when OPEN is 0V can be determined that external antenna has connected, and working properly
It can switch over, when RF ENT high level can switch over.
Specifically, as shown in figure 4, the external antenna interface is equipped with pin 1 and pin 2, pin 2 is grounded, external antenna
The pin 1 of interface is connected with first node, node of the first node between the inductance L2 and capacitor C6；And external antenna connects
The pin 1 of mouth is connected with the first input end of the channel switching module.
Specifically, as shown in figure 5, the internal antenna module includes radio-frequency antenna RF and radio frequency amplifier, radio-frequency antenna
Capacitor C5 and inductance L1, the output end of radio frequency amplifier and the channel switching module are connected between RF and radio frequency amplifier
Second input terminal is connected.The radio frequency amplifier is chip AT2659S.
Specifically, as shown in fig. 6, the locating module is Beidou/GPS dual-mode navigation module.The locating module includes
Chip ATGM336H and ground position peripheral circuit；Positioning peripheral circuit includes zener diode D1, zener diode D2, capacitor
C4, power supply BT1, resistance R1 and capacitor C2；Pin GND phase after zener diode D1 and capacitor C4 series connection with chip ATGM336H
Even, zener diode D2 and power supply BT1 be series between the pin VBAT and DND of chip ATGM336H, and second node and the
Three nodes be connected, node of the second node for zener diode D1 and capacitor C4 between, third node be zener diode D2 and
Node between the pin VBAT of chip ATGM336H；Resistance R1 be series at ATGM336H pin nRESET and pin VCC it
Between；Capacitor C2 is connected with the pin VCC_RF of ATGM336H, and one end ground connection of capacitor C2.
The present invention is not limited to above-mentioned optional embodiment, anyone can obtain various other under the inspiration of the present invention
The product of form, however, make any variation in its shape or structure, it is all to fall into the claims in the present invention confining spectrum
Technical solution, be within the scope of the present invention.
Claims (9)
1. a kind of built-in antenna of satellite positioning communication terminal and external automatic switching control equipment characterized by comprising cut in channel
Change the mold block, the external antenna interface being connected respectively with the first input end of channel switching module and the second input terminal and internal day
Wire module, the locating module being connected with the output end of channel switching module, and it is connected to external antenna interface and channel switching
External antenna detection module between module；External antenna interface is for connecting external antenna；External antenna detection module is used for
Whether detection external antenna interface is connected with external antenna；Channel switching module is for selecting switching working mode, when external day
When line detection module detects that external antenna interface is connected with external antenna, channel switching module, which switches to, to be made external antenna and determines
Position module conducting, otherwise channel switching module, which switches to, is connected internal antenna module with locating module.
2. the built-in antenna of satellite positioning communication terminal according to claim 1 and external automatic switching control equipment, feature
Be: the channel switching module includes chip NLASB3157 and channels peripheral circuit, and channels peripheral circuit includes triode
Q1 and it is connected to the collector of triode Q1 and the resistance R2 of base stage and resistance R3, the emitter ground connection of triode Q1；
The pin S of chip NLASB3157 is connected with the collector of triode Q1, and pin B0, B1 and A of chip NLASB3157 makees respectively
For the first input end, the second input terminal and output end of channel switching module.
3. the built-in antenna of satellite positioning communication terminal according to claim 1 and external automatic switching control equipment, feature
Be: the external antenna interface is SMA interface, UFL interface, IPEX interface, IPX interface, MMCX interface or FAKRA interface.
4. the built-in antenna of satellite positioning communication terminal according to claim 1 or 3 and external automatic switching control equipment, special
Sign is: the external antenna detection module includes triode Q2 and triode Q3；The emitter and triode Q3 of triode Q2
Emitter between be in series with resistance R5 and resistance R4, resistance R4 is parallel with capacitor C7；The collector and triode of triode Q2
Resistance R8 and resistance R9, the intermediate node ground connection of resistance R8 and resistance R9 are in series between the collector of Q3；The transmitting of triode Q3
Pole is in series with resistance R6 and resistance R7, one end ground connection of resistance R7；The emitter of triode Q3 is in series with inductance L2 and capacitor C6,
One end of capacitor C6 is grounded；The collector of triode Q3 is in series with resistance R10.
5. the built-in antenna of satellite positioning communication terminal according to claim 4 and external automatic switching control equipment, feature
Be: the external antenna interface is equipped with pin 1 and pin 2, and pin 2 is grounded, the pin 1 and first node of external antenna interface
It is connected, node of the first node between the inductance L2 and capacitor C6；And the pin 1 of external antenna interface is cut with the channel
The first input end for changing the mold block is connected.
6. the built-in antenna of satellite positioning communication terminal according to claim 1 and external automatic switching control equipment, feature
Be: the internal antenna module includes radio-frequency antenna RF and radio frequency amplifier, is connected between radio-frequency antenna RF and radio frequency amplifier
It is connected to capacitor C5 and inductance L1, the output end of radio frequency amplifier is connected with the second input terminal of the channel switching module.
7. the built-in antenna of satellite positioning communication terminal according to claim 6 and external automatic switching control equipment, feature
Be: the radio frequency amplifier is chip AT2659S.
8. the built-in antenna of satellite positioning communication terminal according to claim 1 and external automatic switching control equipment, feature
Be: the locating module is Beidou/GPS dual-mode navigation module.
9. the built-in antenna of satellite positioning communication terminal according to claim 8 and external automatic switching control equipment, feature
Be: the locating module includes chip ATGM336H and ground positioning peripheral circuit；Positioning peripheral circuit includes two pole of pressure stabilizing
Pipe D1, zener diode D2, capacitor C4, power supply BT1, resistance R1 and capacitor C2；Zener diode D1 and capacitor C4 series connection after with
The pin GND of chip ATGM336H is connected, zener diode D2 and power supply BT1 be series at chip ATGM336H pin VBAT and
Between DND, and second node is connected with third node, node of the second node between zener diode D1 and capacitor C4, the
Node of three nodes between zener diode D2 and the pin VBAT of chip ATGM336H；Resistance R1 is series at ATGM336H's
Between pin nRESET and pin VCC；Capacitor C2 is connected with the pin VCC_RF of ATGM336H, and one end ground connection of capacitor C2.
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| CN201910087421.5A CN109782302A (en) | 2019-01-29 | 2019-01-29 | A kind of built-in antenna of satellite positioning communication terminal and external automatic switching control equipment |
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| CN201910087421.5A CN109782302A (en) | 2019-01-29 | 2019-01-29 | A kind of built-in antenna of satellite positioning communication terminal and external automatic switching control equipment |
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Application publication date: 20190521 |