CN104954052B - Multi-input/output antenna transmission circuit - Google Patents
Multi-input/output antenna transmission circuit Download PDFInfo
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- CN104954052B CN104954052B CN201410123855.3A CN201410123855A CN104954052B CN 104954052 B CN104954052 B CN 104954052B CN 201410123855 A CN201410123855 A CN 201410123855A CN 104954052 B CN104954052 B CN 104954052B
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- transceiver
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- switch unit
- capacitance
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Abstract
A kind of multi-input/output antenna transmission circuit includes RF transceiver and multiple Transmit-Receive Units, and each Transmit-Receive Unit includes antenna, power amplifier, low-noise amplifier, first switch unit and second switch unit.Power amplifier is used to carry out power amplification to the signal to be transmitted that RF transceiver exports by antenna to launch.Low-noise amplifier is for being amplified to be sent to RF transceiver the radiofrequency signal that antenna receives.First switch unit, second switch unit are used to select switching transceiver path according to the reiving/transmitting state of RF transceiver.Above-mentioned multi-input/output antenna transmission circuit carries out transceiver path switching by adding switch unit, realize isolation transmission path and RX path, the harmonic wave interference that transmission path generates between each other with RX path is restrained effectively, while improving the isolation between adjacent antenna.
Description
Technical field
The present invention relates to multi-input/output antenna transmission circuit more particularly to it is a kind of using switch come increase antenna be isolated
The multi-input/output antenna transmission circuit of degree.
Background technology
In multi-input/output antenna transmission circuit, it will usually be used for switching transmission path in the receiving terminal setting of antenna
Transmitting/reception switch with RX path works as radio frequency since transmitting/reception switch is usually unable to reach the requirement of high-isolation
Transceiver is transmitted via power amplifier when radiofrequency signal to antenna, the radiofrequency signal that is transmitted can be coupled to RX path and
Damage is generated to low-noise amplifier or RF transceiver, simultaneously because there are multiple days for multi-input/output antenna transmission circuit
Line, also there is radiation interference in mutiple antennas, and then influence the transmission power of antenna between each other.Therefore, a kind of multi input is designed
It can improve radiofrequency signal coupled interference to multi-output antenna transmission circuit, and promoting antenna transmission power becomes a big research class
Topic.
Invention content
In view of this, a kind of multi-input/output antenna transmission circuit need to be provided, radiofrequency signal coupled interference can be improved,
Promote the transmission power of antenna.
Embodiment of the present invention provides a kind of multi-input/output antenna transmission circuit, including RF transceiver and multiple receipts
Bill member, each Transmit-Receive Unit include antenna, power amplifier, low-noise amplifier, first switch unit and second switch
Unit.The power amplifier is electrically connected to the RF transceiver, the letter to be launched for being exported to the RF transceiver
Number carry out power amplification to be launched by the antenna.The low-noise amplifier is electrically connected to the RF transceiver,
Radiofrequency signal for being received to the antenna is amplified to be sent to the RF transceiver.The first switch unit packet
Common end, first end and second end are included, the common end is electrically connected to the antenna, and the first end is electrically connected to the power
Amplifier, for selecting to connect the antenna and the power amplifier according to the reiving/transmitting state of the RF transceiver, or
The antenna and the low-noise amplifier.The second switch unit includes common end, first end and second end, described public
End is electrically connected to the second end of the first switch unit, and the first end is electrically connected to the low-noise amplifier, and described the
Two ends are grounded, for selecting to connect the low-noise amplifier and described first according to the reiving/transmitting state of the RF transceiver
The second end of switch unit, or connect the second end and ground terminal of the first switch unit.
Preferably, the power amplifier further includes enabled pin, for being controlled according to the reiving/transmitting state of RF transceiver
The operating status for making the power amplifier, when the RF transceiver is in emission state, the power amplifier is in
The second end of working condition, the first switch unit is connected with the ground terminal, and shape is received when the RF transceiver is in
When state, the power amplifier in a dormant state, lead by second end and the low-noise amplifier of the first switch unit
It is logical.
Preferably, the second switch unit includes the first capacitance, the second capacitance, diode, inductance, resistance and third electricity
Hold.First capacitance one end is electrically connected to the second end of the first switch unit.Second capacitance one end is electrically connected
In the other end of first capacitance, the other end is electrically connected to the low-noise amplifier.The diode cathode is electrically connected to
The common end of first capacitance and second capacitance, cathode ground connection.Described inductance one end is electrically connected to first capacitance
With the common end of second capacitance.Described resistance one end is electrically connected to the other end of the inductance, and the other end is electrically connected to institute
State RF transceiver.The third capacitance, one end are electrically connected to the common end of the inductance and the resistance, other end ground connection.
Embodiment of the present invention provides a kind of multi-input/output antenna transmission circuit, including RF transceiver and multiple receipts
Bill member, each Transmit-Receive Unit include antenna, power amplifier, low-noise amplifier, first switch unit and second switch
Unit.The power amplifier is electrically connected to the RF transceiver, the letter to be launched for being exported to the RF transceiver
Number carry out power amplification to be launched by the antenna.The low-noise amplifier is electrically connected to the RF transceiver,
Radiofrequency signal for being received to the antenna is amplified to be sent to the RF transceiver.The first switch unit packet
Common end, first end and second end are included, the common end is electrically connected to the antenna, and the first end is electrically connected to the power
Amplifier, the second end are electrically connected to the low-noise amplifier, for according to the reiving/transmitting state of the RF transceiver come
The antenna and the power amplifier or the antenna and the low-noise amplifier are connected in selection.The second switch list
Member includes common end, first end and second end, and the common end is electrically connected to the low-noise amplifier, and the first end is electrically connected
It is connected to the RF transceiver, the second end ground connection, for selecting to connect according to the reiving/transmitting state of the RF transceiver
The low-noise amplifier and the RF transceiver, or connect the low-noise amplifier and ground terminal.
Preferably, the power amplifier further includes enabled pin, for being controlled according to the reiving/transmitting state of RF transceiver
The operating status for making the power amplifier, when the RF transceiver is in emission state, the power amplifier is in
Working condition, the low-noise amplifier are connected with the ground terminal, described when the RF transceiver is in reception state
In a dormant state, the low-noise amplifier is connected power amplifier with the RF transceiver.
Preferably, the second switch unit includes the first capacitance, the second capacitance, diode, inductance, resistance and third electricity
Hold.First capacitance one end is electrically connected to the low-noise amplifier.Second capacitance one end is electrically connected to described first
The other end of capacitance, the other end are electrically connected to the RF transceiver.The diode cathode is electrically connected to first capacitance
With the common end of second capacitance, cathode ground connection.Described inductance one end is electrically connected to first capacitance and second electricity
The common end of appearance.Described resistance one end is electrically connected to the other end of the inductance, and the other end is electrically connected to the RF transceiver.
Third capacitance one end is electrically connected to the common end of the inductance and the resistance, other end ground connection.
Above-mentioned multi-input/output antenna transmission circuit carries out transceiver path switching by adding switch unit, realize every
From transmission path and RX path, the harmonic wave interference that transmission path generates between each other with RX path is restrained effectively, together
When improve isolation between antennae, and then improve the transmission power and transmission range of antenna.
Description of the drawings
Fig. 1 is the module map in one embodiment of multi-input/output antenna transmission circuit of the present invention.
Fig. 2 is the module map in another embodiment of multi-input/output antenna transmission circuit of the present invention.
Fig. 3 is the circuit diagram in one embodiment of multi-input/output antenna transmission circuit in Fig. 1.
Fig. 4 is the circuit diagram in one embodiment of multi-input/output antenna transmission circuit in Fig. 2.
Main element symbol description
Multi-input/output antenna transmission circuit 100,100a, 100b, 100c
RF transceiver 10
Transmit-Receive Unit 20a, 20b, 20c
Power amplifier 202
Low-noise amplifier 204
First switch unit 206,206a
Second switch unit 208,208a
Antenna 210
Single-pole double-throw switch (SPDT) SW1
First to third capacitance C1, C2, C3
Diode D1
Inductance L1
Resistance R1
Following specific implementation mode will be further illustrated the present invention in conjunction with above-mentioned attached drawing.
Specific implementation mode
Fig. 1 is the module map of multi-input/output antenna transmission circuit 100 in an embodiment of the present invention.In this embodiment party
In formula, multi-input/output antenna transmission circuit 100 include RF transceiver 10 and multiple Transmit-Receive Unit 20a, 20b, 20c (
In present embodiment, only for three, but it is not limited with three, can includes to be fewer of more than three Transmit-Receive Units), with
Realize the transmitting or reception of multiple signals.Each Transmit-Receive Unit 20a, 20b, 20c are put including power amplifier 202, low noise
Big device 204, first switch unit 206, second switch unit 208 and antenna 210.Power amplifier 202 is electrically connected to radio frequency receipts
Device 10 is sent out, power amplifier 202 carries out power amplification to be sent out by antenna 210 to the signal to be transmitted that RF transceiver 10 exports
It is shot out.Low-noise amplifier 204 is electrically connected to RF transceiver 10, the radio frequency that low-noise amplifier 204 receives antenna 210
Signal is amplified to be sent to RF transceiver 10.First switch unit 206 includes common end, first end and second end, the
The common end of one switch unit 206 is electrically connected to antenna 210, and the first end of first switch unit 206 is electrically connected to power amplification
Device 202, first switch unit 206 select to connect antenna 210 and power amplifier according to the reiving/transmitting state of RF transceiver 10
202, or connect antenna 210 and low-noise amplifier 204, to select current transmission path as transmission path or be reception
Path.Second switch unit 208 includes common end, first end and second end, and the common end of second switch unit 208 is electrically connected to
The first end of the second end of first switch unit 206, second switch unit 208 is electrically connected to low-noise amplifier 204, and second opens
The second end ground connection of unit 208 is closed, second switch unit 208 selects to connect low noise according to the reiving/transmitting state of RF transceiver 10
The second end of acoustic amplifier 204 and first switch unit 206, or connect the second end and ground terminal of first switch unit 206.
It should be noted that in the present embodiment, first switch unit 206 and second switch unit 208 all have every
From effect, first switch unit 206 can be used to second switch unit 208 after the amplification that power amplifier 202 is exported is isolated
Signal to be transmitted, avoided high-power signal to be transmitted from being coupled to the input terminal of low-noise amplifier 204 and damage radio frequency
Transceiver 10.When RF transceiver 10 is in emission state, first switch unit connects power amplifier 202 and antenna 210
Launched by antenna 210 with the signal to be transmitted for exporting RF transceiver 10, while second switch unit 208 is public
End is connected with its second end so that the second end of first switch unit 206 is connected with ground terminal.
For example, when in three Transmit-Receive Units 20a, 20b, 20c emitting shape is in there are two Transmit-Receive Unit 20a, 20b
When state, the first switch unit 206 that Transmit-Receive Unit 20a, 20b is included at this time connects power amplifier 202 and antenna 210, receives
The connection of first switch unit 206 disconnection power amplifier 202 and antenna 210 that bill member 20c is included, Transmit-Receive Unit 20a,
The second switch unit 208 that 20b, 20c are included connects the second end and ground terminal of first switch unit 206.How defeated multi input is
Go out antenna transmission circuit 100 by the conducting of second switch unit 208 ground connection so that multi-input/output antenna transmission circuit 100 exists
When emission state, though in the presence of the Transmit-Receive Unit 20c not emitted can penetrate it includes antenna 210 receive other transmitting-receivings
The radiofrequency signal of unit 20a, 20b transmitting, can be also conducting to ground, to keep away by the second switch unit 208 in Transmit-Receive Unit 20c
Exempt to exist between Transmit-Receive Unit 20a, 20b, 20c and interfere with each other, promotes the peak power output of antenna 210, and then improve day
The transmitting range and efficiency of transmission of line 210 also can avoid the radiofrequency signal that Transmit-Receive Unit 20c is received and be sent to low noise amplification
The input terminal of device 204 and damage RF transceiver 10.In the other embodiment of the present invention, when multi-input/output antenna is received
When Power Generation Road 100 includes more than four Transmit-Receive Units, operation principle is identical as three Transmit-Receive Units 20a, 20b, 20c, therefore
This is no longer described in detail.
It should be noted that the electrical connection of low-noise amplifier 204 and second switch unit 208 can be according to reality
Circuit layout is adjusted, and Fig. 2 is low-noise amplifier 204 and second switch list in another embodiment of the present invention
The electrical connection of member 208, operation principle and the low-noise amplifier 204 in Fig. 1 are similar to second switch unit 208, therefore
This is no longer described in detail.
Fig. 3 is the circuit diagram of multi-input/output antenna transmission circuit 100b in an embodiment of the present invention.In this implementation
In mode, the circuit framework and operation principle all same of Transmit-Receive Unit 20a, 20b, 20c, therefore only done below with Transmit-Receive Unit 20a
It is discussed in detail.Transmit-Receive Unit 20a includes power amplifier 202, low-noise amplifier 204, first switch unit 206a, second opens
Close unit 208a and antenna 210.Power amplifier 202 includes enabled pin, is used for the reiving/transmitting state according to RF transceiver 10
The operating status of power amplifier 202 is controlled, when RF transceiver 10 is in emission state, power amplifier 202 makes
Energy pin is high level, and power amplifier 202 is in running order, and second end and the ground terminal of first switch unit 206a connect
It connects, when RF transceiver 10 is in reception state, the enabled pin of power amplifier 202 is low level, power amplifier 202
In a dormant state, the second end of first switch unit 206a is connect with low-noise amplifier 204.
In the present embodiment, first switch unit 206a is single-pole double-throw switch (SPDT) SW1, and single-pole double-throw switch (SPDT) SW1 includes
Common end, first end and second end.The common end of single-pole double-throw switch (SPDT) SW1 is electrically connected to antenna 210, single-pole double-throw switch (SPDT) SW1
First end be electrically connected to power amplifier 202, the second end of single-pole double-throw switch (SPDT) SW1 is electrically connected to second switch unit 208,
Multi-input/output antenna transmission circuit 100a carries out cutting for transmission path and RX path by single-pole double-throw switch (SPDT) SW1
It changes.In the other embodiment of the present invention, first switch unit 206a can also be transistor switch or other have list
Input the switch module of dual output.
Second switch unit 208a includes the first capacitance C1, the second capacitance C2, third capacitance C3, diode D1, inductance L1
And resistance R1.One end of first capacitance C1 is electrically connected to the second end of single-pole double-throw switch (SPDT) SW1.One end of second capacitance C2 is electrically connected
It is connected to the other end of the first capacitance C1, the other end of the second capacitance C2 is electrically connected to low-noise amplifier 204.Diode D1 is just
Pole is electrically connected to the common end of the first capacitance C1 and the second capacitance C2, the cathode ground connection of diode D1.The one end inductance L1 is electrically connected
In the common end of the first capacitance C1 and the second capacitance C2.One end of resistance R1 is electrically connected to the other end of inductance L1, resistance R1's
The other end is electrically connected to RF transceiver 10 and enables the common end of pin with power amplifier 202.One end electricity of third capacitance C3
It is connected to the common end of inductance L1 and resistance R1, the other end ground connection of third capacitance C3.
For example, when Transmit-Receive Unit 20a is in emission state, the enabled pin of power amplifier 202 is high level,
Diode D1 conducting, the other end ground connection of the first capacitance C1, to which low-noise amplifier 204 and power amplifier 202 be isolated
Interference, while the radiofrequency signal that other Transmit-Receive Unit 20b, 20c for being not in emission state are received is included also through it
The first capacitance C1 connect to ground, to realize that the radiofrequency signal for avoiding Transmit-Receive Unit 20b, 20c from being received is sent to its institute
Including low-noise amplifier 204 so that damage RF transceiver 10, improve the isolation between adjacent antenna.Work as Transmit-Receive Unit
When 20a is in reception state, the enabled pin of power amplifier 202 is low level, and diode D1 ends, and antenna 210 is received
Radiofrequency signal low-noise amplifier 204 is sent to by the first capacitance C1, the second capacitance C2, using low-noise amplifier
204 be amplified after be sent to RF transceiver 10.
Fig. 4 is the circuit diagram of multi-input/output antenna transmission circuit 100c in an embodiment of the present invention.In this implementation
In mode, the input multi-output antenna transmission circuit 100c and input multi-output antenna transmission circuit 100b in Fig. 3 is essentially identical,
It the difference is that only the low-noise amplifier 204 and second switch unit 208a in input multi-output antenna transmission circuit 100c
Electrical connection change, so being no longer described in detail.
Above-mentioned multi-input/output antenna transmission circuit carries out transceiver path switching by adding switch unit, realize every
From transmission path and RX path, the harmonic wave interference that transmission path generates between each other with RX path is restrained effectively, together
When improve isolation between antennae, and then improve the transmission power and transmission range of antenna.
Claims (4)
1. a kind of multi-input/output antenna transmission circuit, including RF transceiver and multiple Transmit-Receive Units, which is characterized in that every
One Transmit-Receive Unit includes：
Antenna；
Power amplifier is electrically connected to the RF transceiver, the signal to be transmitted for exporting to the RF transceiver into
Row power amplification by the antenna to be launched；
Low-noise amplifier is electrically connected to the RF transceiver, and the radiofrequency signal for being received to the antenna is amplified
To be sent to the RF transceiver；
First switch unit, including common end, first end and second end, the common end are electrically connected to the antenna, and described
One end is electrically connected to the power amplifier, for selecting to connect the antenna according to the reiving/transmitting state of the RF transceiver
With the power amplifier, or the connection antenna and the low-noise amplifier；And
Second switch unit, including common end, first end and second end, the common end are electrically connected to the first switch unit
Second end, the first end is electrically connected to the low-noise amplifier, the second end ground connection, for being received according to the radio frequency
The reiving/transmitting state of device is sent out to select to connect the second end of the low-noise amplifier and the first switch unit, or described in connection
The second end and ground terminal of first switch unit；Wherein, the second switch unit includes：
First capacitance, one end are electrically connected to the second end of the first switch unit；
Second capacitance, one end are electrically connected to the other end of first capacitance, and the other end is electrically connected to the low-noise amplifier；
Diode, anode are electrically connected to the common end of first capacitance and second capacitance, cathode ground connection；
Inductance, one end are electrically connected to the common end of first capacitance and second capacitance；
Resistance, one end are electrically connected to the other end of the inductance, and the other end is electrically connected to the RF transceiver；And
Third capacitance, one end are electrically connected to the common end of the inductance and the resistance, other end ground connection.
2. multi-input/output antenna transmission circuit as described in claim 1, which is characterized in that the power amplifier also wraps
Enabled pin is included, the operating status for controlling the power amplifier according to the reiving/transmitting state of RF transceiver, when described
When RF transceiver is in emission state, the power amplifier is in running order, the second end of the first switch unit
Be connected with the ground terminal, when the RF transceiver is in reception state, the power amplifier in a dormant state, institute
The second end for stating first switch unit is connected with the low-noise amplifier.
3. a kind of multi-input/output antenna transmission circuit, including RF transceiver and multiple Transmit-Receive Units, which is characterized in that every
One Transmit-Receive Unit includes：
Antenna；
Power amplifier is electrically connected to the RF transceiver, the signal to be transmitted for exporting to the RF transceiver into
Row power amplification by the antenna to be launched；
Low-noise amplifier is electrically connected to the RF transceiver, and the radiofrequency signal for being received to the antenna is amplified
To be sent to the RF transceiver；
First switch unit, including common end, first end and second end, the common end are electrically connected to the antenna, and described
One end is electrically connected to the power amplifier, and the second end is electrically connected to the low-noise amplifier, for being penetrated according to
The reiving/transmitting state of frequency transceiver selects to connect the antenna and the power amplifier, or connects the antenna and the low noise
Acoustic amplifier；And
Second switch unit, including common end, first end and second end, the common end are electrically connected to the low noise amplification
Device, the first end are electrically connected to the RF transceiver, the second end ground connection, for the receipts according to the RF transceiver
Hair-like state selects to connect the low-noise amplifier and the RF transceiver, or connects the low-noise amplifier and ground connection
End；Wherein, the second switch unit includes：
First capacitance, one end are electrically connected to the low-noise amplifier；
Second capacitance, one end are electrically connected to the other end of first capacitance, and the other end is electrically connected to the RF transceiver；
Diode, anode are electrically connected to the common end of first capacitance and second capacitance, cathode ground connection；
Inductance, one end are electrically connected to the common end of first capacitance and second capacitance；
Resistance, one end are electrically connected to the other end of the inductance, and the other end is electrically connected to the RF transceiver；And
Third capacitance, one end are electrically connected to the common end of the inductance and the resistance, other end ground connection.
4. multi-input/output antenna transmission circuit as claimed in claim 3, which is characterized in that the power amplifier also wraps
Enabled pin is included, the operating status for controlling the power amplifier according to the reiving/transmitting state of RF transceiver, when described
When RF transceiver is in emission state, the power amplifier is in running order, and the low-noise amplifier connects with described
Ground terminal be connected, when the RF transceiver is in reception state, the power amplifier in a dormant state, the low noise
Amplifier is connected with the RF transceiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410123855.3A CN104954052B (en) | 2014-03-28 | 2014-03-28 | Multi-input/output antenna transmission circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410123855.3A CN104954052B (en) | 2014-03-28 | 2014-03-28 | Multi-input/output antenna transmission circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104954052A CN104954052A (en) | 2015-09-30 |
| CN104954052B true CN104954052B (en) | 2018-08-07 |
Family
ID=54168441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410123855.3A Expired - Fee Related CN104954052B (en) | 2014-03-28 | 2014-03-28 | Multi-input/output antenna transmission circuit |
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| CN110289883B (en) * | 2019-07-31 | 2021-09-28 | 维沃移动通信有限公司 | Radio frequency circuit, terminal equipment and circuit control method |
| CN110830071A (en) * | 2019-11-12 | 2020-02-21 | 天津津航计算技术研究所 | Multi-antenna radio frequency front-end circuit |
| CN112057030B (en) * | 2020-09-11 | 2022-10-14 | 深圳市资福医疗技术有限公司 | System, method and medium for adjusting power of capsule endoscope |
| CN114337694B (en) * | 2020-09-27 | 2023-08-11 | Oppo广东移动通信有限公司 | Radio frequency L-PA Mid device, radio frequency receiving and transmitting system and communication equipment |
| CN112436845B (en) * | 2020-12-02 | 2022-05-13 | Oppo广东移动通信有限公司 | Radio frequency L-PA Mid device, radio frequency transceiving system and communication equipment |
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| Publication number | Publication date |
|---|---|
| CN104954052A (en) | 2015-09-30 |
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