CN103795431B - There is wireless transmitter and the method for adjustment thereof of frequency band match adjustment function - Google Patents
There is wireless transmitter and the method for adjustment thereof of frequency band match adjustment function Download PDFInfo
- Publication number
- CN103795431B CN103795431B CN201410041256.7A CN201410041256A CN103795431B CN 103795431 B CN103795431 B CN 103795431B CN 201410041256 A CN201410041256 A CN 201410041256A CN 103795431 B CN103795431 B CN 103795431B
- Authority
- CN
- China
- Prior art keywords
- frequency band
- radiofrequency signal
- band match
- variable capacitance
- inductance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Transceivers (AREA)
- Transmitters (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The invention provides a kind of wireless transmitter and the method for adjustment thereof with frequency band match adjustment function, mainly comprise multiple transmitting circuit, multiple receiving lines, a frequency band match Circuit tuning and a radiofrequency signal sending and receiving end, wherein transmitting circuit and/or receiving lines connect radiofrequency signal sending and receiving end by frequency band match Circuit tuning.When transmitting or received RF signal (front), can according to the impedance of the frequency range adjustment frequency band match Circuit tuning of radiofrequency signal, frequency band match Circuit tuning is made to be high impedance or Low ESR relative to the frequency range of the radiofrequency signal receiving or launch, whereby to reduce the loss of radiofrequency signal when receiving or launch.
Description
Technical field
The present invention relates to a kind of wireless transmitter and the method for adjustment thereof with frequency band match adjustment function, the loss of radiofrequency signal when receiving or launch can being reduced.
Background technology
Please refer to Fig. 1, is the block schematic diagram of existing wireless transmitter.Wireless transmitter (transceiver) 10 is in order to launch and to receive wireless signal, and comprise an antenna element 11, multiple RF switching unit 12, multiple transmitting matching unit 13, multiple reception matching unit 14, multiple transmitting circuit 15 and multiple receiving lines 17, wherein antenna element 11 connects transmitting circuit 15 by part RF switching unit 12 and transmitting matching unit 13, and connects receiving lines 17 by other RF switching unit 12 and reception matching unit 14.
When by wireless transmitter 10 emitting radio frequency signal, the first RF switching unit 121 can be opened, make the first transmitting circuit 151 connect antenna element 11 via the first transmitting matching unit 131 and the first RF switching unit 121, and radiofrequency signal is sent to antenna element 11.When the first RF switching unit 121 is opened, second RF switching unit 123, the 3rd RF switching unit 125 and the 4th RF switching unit 127 can be closed, launch circuit 153, first receiving lines 171 and the second receiving lines 173 with isolated second whereby, launch by first the efficiency that circuit 151 is sent to antenna element 11 to improve radiofrequency signal.
When transmitting the radiofrequency signal of different frequency range, then can open the second RF switching unit 123, and close the first RF switching unit 121, the 3rd RF switching unit 125 and the 4th RF switching unit 127, make radiofrequency signal launch circuit 153 by second and be sent to antenna element 11 via the second transmitting matching unit 133 and the second RF switching unit 123.
When received RF signal, then can open the 3rd RF switching unit 125, and close the first RF switching unit 121, second RF switching unit 123 and the 4th RF switching unit 127, the radiofrequency signal that antenna element 11 is received is sent to the first receiving lines 171 via the 3rd RF switching unit 125 and the first reception matching unit 141.In addition the 4th RF switching unit 127 can also be opened, and close the first RF switching unit 121, second RF switching unit 123 and the 3rd RF switching unit 125, the radiofrequency signal that antenna element 11 is received is sent to the second receiving lines 173 via the 4th RF switching unit 127 and the second reception matching unit 143, can receive the radiofrequency signal of different frequency range whereby.
By switching each RF switching unit 12 of wireless transmitter 10, reception and the transmitting of radiofrequency signal just can be carried out.But wireless transmitter 10 need arrange multiple RF switching unit 12, multiple transmitting matching unit 13 and multiple reception matching unit 14, the area of wireless transmitter 10 and cost of manufacture is caused effectively to reduce.In the process of this external transmitting or received RF signal, radiofrequency signal all through a RF switching unit 12, and can cause the loss of radiofrequency signal.
Summary of the invention
An object of the present invention, be to provide a kind of wireless transmitter with frequency band match adjustment function, mainly comprise multiple receiving lines, multiple transmitting circuit, a radiofrequency signal sending and receiving end, a frequency band match Circuit tuning and multiple band matching circuit, wherein frequency band match Circuit tuning connects receiving lines or launches circuit, and band matching circuit does not then connect the receiving lines of frequency band match Circuit tuning or launches circuit.Launch or received RF signal process in, frequency band match Circuit tuning can adjust impedance according to the frequency range of radiofrequency signal, receives or the loss of radiofrequency signal of transmitting whereby to reduce.
An object of the present invention, be to provide a kind of wireless transmitter with frequency band match adjustment function, mainly comprise multiple receiving lines, multiple transmitting circuit, a radiofrequency signal sending and receiving end, one first frequency band match Circuit tuning and one second frequency band match Circuit tuning, wherein the first frequency band match Circuit tuning connects receiving lines, and the second frequency band match Circuit tuning then connects transmitting circuit.Launch or received RF signal process in, the first frequency band match Circuit tuning and the second frequency band match Circuit tuning can adjust impedance according to the frequency range of radiofrequency signal, receive or the loss of radiofrequency signal of transmitting whereby to reduce.
An object of the present invention, be the method for adjustment of the frequency band match that a kind of wireless transmitter is provided, the frequency range of the radiofrequency signal of Main Basis reception or transmitting, adjustment connects the impedance of the frequency band match Circuit tuning of receiving lines and/or transmitting circuit, frequency band match Circuit tuning is made to be high impedance or Low ESR relative to the frequency range of the radiofrequency signal receiving or launch, whereby to reduce the loss of the radiofrequency signal received or launch.
An object of the present invention, be the method for adjustment of the frequency band match that a kind of wireless transmitter is provided, the frequency range of the radiofrequency signal of Main Basis reception or transmitting, adjustment connects receiving lines and/or launches the frequency band match Circuit tuning of circuit, frequency band match Circuit tuning is become band stop filter (notchfilter) that one has adjustment function, and can in order to the characteristic frequency band signal of filtering one times, twice, three times or multiples arbitrarily.
For achieving the above object, the invention provides a kind of wireless transmitter with frequency band match adjustment function, in order to receive and to launch a radiofrequency signal, comprising: multiple transmitting circuit; Multiple receiving lines; One frequency band match Circuit tuning, connects multiple receiving lines or multiple transmitting circuit, and foundation receives or the frequency range of the radiofrequency signal of transmitting, the impedance of adjustment frequency band match Circuit tuning; Multiple band matching circuit, do not connect multiple transmitting circuit of frequency band match Circuit tuning or multiple receiving lines respectively, wherein multiple band matching circuit has lower impedance to the radiofrequency signal of different frequency range respectively; And a radiofrequency signal sending and receiving end, connect frequency band match Circuit tuning and band matching circuit.
In addition, the present invention also provides another kind to have the wireless transmitter of frequency band match adjustment function, in order to receive or to launch a radiofrequency signal, comprising: multiple transmitting circuit; Multiple receiving lines; One first frequency band match Circuit tuning, connects multiple transmitting circuit, and adjusts impedance according to the frequency range of radiofrequency signal; One second frequency band match Circuit tuning, connects multiple receiving lines, and adjusts impedance according to the frequency range of radiofrequency signal; And a radiofrequency signal sending and receiving end, connect the first frequency band match Circuit tuning and the second frequency band match Circuit tuning.
The present invention also provides a kind of method of adjustment of frequency band match of wireless transmitter, wherein wireless transmitter comprises multiple transmitting circuit, multiple band matching circuit, multiple receiving lines, a frequency band match Circuit tuning and a radiofrequency signal sending and receiving end, frequency band match Circuit tuning connects launches circuit or receiving lines, band matching circuit does not then connect transmitting circuit or the receiving lines of frequency band match Circuit tuning, comprise the following steps: according to the frequency range of the radiofrequency signal for receiving or launch, the impedance of adjustment frequency band match Circuit tuning; And the radiofrequency signal of reception or transmit frequency band.
The present invention also provides the method for adjustment of the frequency band match of another kind of wireless transmitter, wherein wireless transmitter comprises multiple transmitting circuit, multiple receiving lines, one first frequency band match Circuit tuning, one second frequency band match Circuit tuning and a radiofrequency signal sending and receiving end, first frequency band match Circuit tuning and the second frequency band match Circuit tuning connect respectively launches circuit and receiving lines, and comprise the following steps: according to the frequency range of the radiofrequency signal for receiving or launch, adjust the impedance of the first frequency band match Circuit tuning and the second frequency band match Circuit tuning; And the radiofrequency signal of reception or transmit frequency band
In wireless transmitter one embodiment of the present invention, wherein frequency band match Circuit tuning comprises a variable capacitance, at least one inductance and a switch element, variable capacitance series inductance, one end of switch element connects variable capacitance or inductance, and the other end of switch element then connects ground connection.
In wireless transmitter one embodiment of the present invention, wherein frequency band match Circuit tuning is by variable capacitance and switch element adjustment impedance.
In wireless transmitter one embodiment of the present invention, wherein frequency band match Circuit tuning comprises at least one electric capacity, a variable inductance and a switch element, capacitances in series variable inductance, one end of switch element connects variable inductance or electric capacity, and the other end of switch element then connects ground connection.
In wireless transmitter one embodiment of the present invention, wherein the first frequency band match Circuit tuning comprises one first variable capacitance, at least one first inductance and one first switch element, first variable capacitance is connected the first inductance, one end of first switch element connects the first variable capacitance or the first inductance, the other end of the first switch element then connects ground connection, second frequency band match Circuit tuning then comprises one second variable capacitance, at least one second inductance and a second switch unit, second variable capacitance is connected the second inductance, one end of second switch unit connects the second variable capacitance or the second inductance, the other end of second switch unit then connects ground connection.
In method of adjustment one embodiment of the present invention, wherein frequency band match Circuit tuning comprises a variable capacitance, at least one inductance and a switch element, variable capacitance connects inductance, and one end of switch element connects variable capacitance or inductance, and the other end of switch element then connects ground connection.
In method of adjustment one embodiment of the present invention, wherein frequency band match Circuit tuning connects receiving lines, and band matching circuit then connects transmitting circuit, and comprises the following steps: opening switch unit, makes variable capacitance and inductance connect ground connection via switch element; The frequency range of the radiofrequency signal of launching according to transmitting circuit wish, the capacitance of adjustment variable capacitance, makes frequency band match Circuit tuning be high impedance relative to the frequency range by the radiofrequency signal of launching the transmitting of circuit wish; And wherein radiofrequency signal, via the band matching circuit connected, is sent to radiofrequency signal sending and receiving end by a transmitting circuit.
In method of adjustment one embodiment of the present invention, comprise the following steps: closing switch unit, make radiofrequency signal sending and receiving end connect receiving lines via variable capacitance and inductance; According to the frequency range of receiving lines for the radiofrequency signal of reception, the capacitance of adjustment variable capacitance, makes frequency band match Circuit tuning be Low ESR relative to the frequency range of the radiofrequency signal received by receiving lines wish; And receiving lines via frequency band match Circuit tuning by radiofrequency signal sending and receiving end received RF signal.
In method of adjustment one embodiment of the present invention, wherein frequency band match Circuit tuning connects transmitting circuit, band matching circuit then connects receiving lines, and comprises the following steps: closing switch unit, radiofrequency signal sending and receiving end is connected via variable capacitance and inductance and launches circuit; According to launching the frequency range of circuit for the radiofrequency signal of transmitting, the capacitance of adjustment variable capacitance, making frequency band match Circuit tuning relative to the frequency range of launching circuit for the radiofrequency signal of launching is Low ESR; And wherein radiofrequency signal, via frequency band match Circuit tuning, is sent to radiofrequency signal sending and receiving end by a transmitting circuit.
In method of adjustment one embodiment of the present invention, comprise the following steps: opening switch unit, make variable capacitance and inductance connect ground connection via switch element; According to the frequency range of receiving lines for the radiofrequency signal of reception, the capacitance of adjustment variable capacitance, the frequency range of the radiofrequency signal that frequency band match Circuit tuning is received relative to receiving lines wish is high impedance; And radiofrequency signal is sent to receiving lines via a wherein band matching circuit by radiofrequency signal sending and receiving end.
In method of adjustment one embodiment of the present invention, wherein the first frequency band match Circuit tuning comprises one first variable capacitance, at least one first inductance and one first switch element, first variable capacitance connects the first inductance, one end of first switch element connects the first variable capacitance or the first inductance, the other end of the first switch element then connects ground connection, and the second frequency band match Circuit tuning comprises one second variable capacitance, at least one second inductance and a second switch unit, second variable capacitance connects the second inductance, one end of second switch unit connects the second variable capacitance or the second inductance, the other end of second switch unit then connects ground connection.
In method of adjustment one embodiment of the present invention, comprise the following steps: close the first switch element; Open second switch unit, make radiofrequency signal sending and receiving end connect ground connection via the second variable capacitance, the second inductance and second switch unit; According to launching the frequency range of circuit for the radiofrequency signal of transmitting, adjust the capacitance of the first variable capacitance and the second variable capacitance, making the first frequency band match Circuit tuning relative to the frequency range of the radiofrequency signal of launching the transmitting of circuit wish is Low ESR, and the frequency range of the radiofrequency signal that the second frequency band match Circuit tuning is launched relative to transmitting circuit wish is high impedance; And wherein radiofrequency signal, via the first frequency band match Circuit tuning be connected, is sent to radiofrequency signal sending and receiving end by a transmitting circuit.
In method of adjustment one embodiment of the present invention, comprise the following steps: open the first switch element, make radiofrequency signal sending and receiving end connect ground connection via the first variable capacitance, the first inductance and the first switch element; Close second switch unit; According to the frequency range of receiving lines for the radiofrequency signal of reception, adjust the capacitance of the first variable capacitance and the second variable capacitance, the frequency range of the radiofrequency signal that the first frequency band match Circuit tuning is received relative to receiving lines wish is high impedance, and the frequency range of the radiofrequency signal that the second frequency band match Circuit tuning is received relative to receiving lines wish is Low ESR; And wherein a receiving lines via the second frequency band match Circuit tuning by radiofrequency signal sending and receiving end received RF signal.
Accompanying drawing explanation
Fig. 1 is the block schematic diagram of existing wireless transmitter;
Fig. 2 is the organigram that the present invention has wireless transmitter one embodiment of frequency band match adjustment function;
Fig. 3 is the flow chart of steps of method of adjustment one embodiment of the frequency band match of wireless transmitter of the present invention;
Fig. 4 is the organigram that the present invention has the another embodiment of wireless transmitter of frequency band match adjustment function;
Fig. 5 is the flow chart of steps of the another embodiment of method of adjustment of the frequency band match of wireless transmitter of the present invention;
Fig. 6 is the organigram that the present invention has the another embodiment of wireless transmitter of frequency band match adjustment function;
Fig. 7 is the organigram that the present invention has the another embodiment of wireless transmitter of frequency band match adjustment function;
Fig. 8 is the organigram that the present invention has the another embodiment of wireless transmitter of frequency band match adjustment function;
Fig. 9 is the flow chart of steps of the another embodiment of method of adjustment of the frequency band match of wireless transmitter of the present invention;
Figure 10 is the organigram that the present invention has the another embodiment of wireless transmitter of frequency band match adjustment function;
Figure 11 is the organigram that the present invention has the another embodiment of wireless transmitter of frequency band match adjustment function; And
Figure 12 is the organigram that the present invention has the another embodiment of wireless transmitter of frequency band match adjustment function.
Although mode has been described in the drawings the specific embodiment of the present invention by way of example, and is described in detail it in this article, the present invention has also allowed various amendment and replacement form.Accompanying drawing content of the present invention can be inequality proportion, accompanying drawing and detailed description thereof are only the announcement of specific pattern, be not restriction of the present invention, contrary, according to modifying in the spirit and scope of claims, impartial component and displacement thereof be all the scope that the present invention is contained.
Reference numeral
10: wireless transmitter 11: antenna element
12: RF switching unit 121: the first RF switching unit
123: the second RF switching unit 125: the three RF switching unit
127: the four RF switching unit 13: launch matching unit
Launch matching unit 133: the second at 131: the first launches matching unit
14: receive matching unit 141: the first and receive matching unit
Receive matching unit 15 at 143: the second: launch circuit
Launch circuit 153: the second at 151: the first launches circuit
17: receiving lines 171: the first receiving lines
173: the second receiving liness
20: wireless transmitter 21: radiofrequency signal sending and receiving end
22: antenna element 23: band matching circuit
231: the first band matching circuit 233: the second band matching circuit
24: frequency band match Circuit tuning 25: launch circuit
Launch circuit 253: the second at 251: the first launches circuit
27: receiving lines 271: the first receiving lines
273: the second receiving liness 29: amplifier
50: wireless transmitter 500: wireless transmitter
54: frequency band match Circuit tuning 541: inductance
543: variable capacitance 545: switch element
74: frequency band match Circuit tuning 741: variable inductance
743: electric capacity 745: switch element
80: wireless transmitter
83: the first frequency band match Circuit tunings
831: the first inductance 833: the first variable capacitances
835: the first switch elements
84: the second frequency band match Circuit tunings
841: the second inductance 843: the second variable capacitances
845: second switch unit
Embodiment
Please refer to Fig. 2, there is for the present invention the organigram of wireless transmitter one embodiment of frequency band match adjustment function.As shown in the figure, wireless transmitter 20 described in the embodiment of the present invention comprises a radiofrequency signal sending and receiving end 21, multiple band matching circuit 23, frequency band match Circuit tuning 24, multiple transmitting circuit 25 and multiple receiving lines 27, wherein frequency band match Circuit tuning 24 connects multiple receiving lines 27 or multiple transmitting circuit 25, and multiple band matching circuit 23 does not then connect multiple transmitting circuit 25 or multiple receiving lines 27 of frequency band match Circuit tuning 24 respectively.In the present embodiment, receiving lines 27 connects radiofrequency signal sending and receiving end 21 by frequency band match Circuit tuning 24, and each is launched circuit 25 and then connects radiofrequency signal sending and receiving end 21 respectively by different band matching circuit 23.
The impedance of frequency band match Circuit tuning 24 is can be controlled, in an embodiment of the present invention, please coordinate with reference to Fig. 3, can according to the frequency range of the radiofrequency signal for receiving or launch, adjustment connects the impedance of the frequency band match Circuit tuning 24 of receiving lines 27 or transmitting circuit 25, as indicated at step 31.After the impedance of frequency band match Circuit tuning 24 has adjusted, just can receive or launch the radiofrequency signal of this frequency range, as shown in step 33.
Convenience during in order to illustrate, the band matching circuit 23 of the embodiment of the present invention, launch the quantity of circuit 25 and receiving lines 27 all for two, in addition radiofrequency signal sending and receiving end 21 also can connect an antenna element 22, and is launched or received RF signal by antenna element 22, as shown in Figure 2.Certainly in different embodiments, the quantity of band matching circuit 23, transmitting circuit 25 and receiving lines 27 also can be two or more, as shown in Figure 4.
In embodiments of the present invention, band matching circuit 23 comprises one first band matching circuit 231 and one second band matching circuit 233; Launch circuit 25 and comprise one first transmitting circuit 251 and one second transmitting circuit 253; Receiving lines 27 comprises one first receiving lines 271 and one second receiving lines 273.First launches circuit 251 connects radiofrequency signal sending and receiving end 21 via the first band matching circuit 231, second launches 253, circuit connects radiofrequency signal sending and receiving end 21 via the second band matching circuit 233, and the first receiving lines 271 and the second receiving lines 273 all connect radiofrequency signal sending and receiving end 21 by frequency band match Circuit tuning 24.
The radiofrequency signal of the first band matching circuit 231 and the second band matching circuit 233 pairs of different frequency ranges has difference or lower impedance.In an embodiment of the present invention, the first band matching circuit 231 is Low ESR to the radiofrequency signal of the first frequency range, and the second band matching circuit 233 is then high impedance to the radiofrequency signal of the first frequency range.Otherwise the second band matching circuit 233 is Low ESR to the radiofrequency signal of the second frequency range, the first band matching circuit 231 is then high impedance to the radiofrequency signal of the second frequency range.First frequency range and the second frequency range can be multiple proportion, and such as the first frequency range is the radiofrequency signal of 900MHz, then the second frequency range can be the radiofrequency signal of 1800MHz.
In an embodiment of the present invention, first launches circuit 251 in order to launch the radiofrequency signal of the first frequency range, because the first band matching circuit 231 is Low ESR to the radiofrequency signal of the first frequency range, and between the first transmitting circuit 251 and radiofrequency signal sending and receiving end 21, switch element is not set, therefore can reduce the first transmitting circuit 251 and radiofrequency signal is sent to the loss of signal produced in the process of radiofrequency signal sending and receiving end 21.In addition the second band matching circuit 233 is then high impedance to the radiofrequency signal that first launches the first frequency range that circuit 251 produces, also the radiofrequency signal of the first frequency range can be avoided to be sent to the second transmitting circuit 253 via the second band matching circuit 233, to be conducive to the loss of the radiofrequency signal of reduction by first frequency range equally.
In an embodiment of the present invention, second launches circuit 253 can in order to launch the radiofrequency signal of the second frequency range, because the second band matching circuit 233 is Low ESR to the radiofrequency signal of the second frequency range, and between the second transmitting circuit 253 and radiofrequency signal sending and receiving end 21, switch element is not set, therefore can reduce the second transmitting circuit 253 and radiofrequency signal is sent to the loss of signal produced in the process of radiofrequency signal sending and receiving end 21.In addition the first band matching circuit 231 is high impedance to the radiofrequency signal that second launches the second frequency range that circuit 253 produces, the radiofrequency signal of the second frequency range can be avoided to be sent to the first transmitting circuit 251 via the first band matching circuit 231, to be conducive to the loss of the radiofrequency signal of reduction by second frequency range equally.
In one of reception of the present invention and emitting radio frequency signal more detailed embodiment, please coordinate with reference to shown in Fig. 5, can according to the frequency range of launching the radiofrequency signal that circuit 25 tendency to develop is sent, adjustment connects the impedance of the frequency band match Circuit tuning 24 of receiving lines 27, the frequency range of the radiofrequency signal that frequency band match Circuit tuning 24 is sent relative to 25 tendencies to develop of transmitting circuit is high impedance, as shown in step 41.
At least one transmitting circuit 25 launches the radiofrequency signal of special frequency channel to radio-frequency receiving-transmitting end 21 via the band matching circuit 23 connected, as shown in step 43.Because frequency band match Circuit tuning 24 is high impedance relative to launching the frequency range of radiofrequency signal that circuit 25 launches, the radiofrequency signal that radio-frequency line 25 is launched can not be sent to receiving lines 27 via frequency band match Circuit tuning 24, and can reduce launch circuit 25 radiofrequency signal is sent to the loss of signal produced in the process of radiofrequency signal sending and receiving end 21.
In an embodiment of the present invention, if first launches circuit 251 for launching the radiofrequency signal of the first frequency range, the then impedance of adjustable frequency band match Circuit tuning 24, make frequency band match Circuit tuning 24 be high impedance to the radiofrequency signal of the first frequency range, be sent to receiving lines 27 to avoid the radiofrequency signal of the first frequency range via frequency band match Circuit tuning 24.Otherwise, if second launches circuit 253 for launching the radiofrequency signal of the second frequency range, the then impedance of adjustable frequency band match Circuit tuning 24, make frequency band match Circuit tuning 24 be high impedance to the radiofrequency signal of the second frequency range, be sent to receiving lines 27 to avoid the radiofrequency signal of the second frequency range via frequency band match Circuit tuning 24.
In addition the frequency range of the radiofrequency signal of receiving lines 27 also can be delivered to according to radiofrequency signal sending and receiving end 21 tendency to develop, adjustment connects the impedance of the frequency band match Circuit tuning 24 of receiving lines 27, make frequency band match Circuit tuning 24 relative to receiving lines 27 be Low ESR for the frequency range of radiofrequency signal that receives, such as adjust the impedance of frequency band match Circuit tuning 24, the radiofrequency signal of frequency band match Circuit tuning 24 to the first frequency range or the second frequency range is made to be Low ESR, as shown by step 45.
At least one receiving lines 27 is received the radiofrequency signal of special frequency channel by radio-frequency receiving-transmitting end 21 via the frequency band match Circuit tuning 24 connected, as shown in step 47.The frequency range of the radiofrequency signal received relative to receiving lines 27 due to frequency band match Circuit tuning 24 is Low ESR, can reduce radiofrequency signal sending and receiving end 21 and radiofrequency signal is sent to the loss of signal produced in the process of receiving lines 27 via frequency band match Circuit tuning 24.
In an embodiment of the present invention, each launches circuit 25 also can connect an amplifier 29 respectively, as shown in Figure 6, in the process of receiving lines 27 by radiofrequency signal sending and receiving end 21 received RF signal, the amplifier 29 connecting and launch circuit 24 can be closed, be sent to avoid the radiofrequency signal received and launch circuit 25, the issuable loss of signal in the process of received RF signal can be avoided equally.
Please refer to Fig. 7, there is for the present invention the organigram of the another embodiment of wireless transmitter of frequency band match adjustment function.As shown in the figure, wireless transmitter 50 described in the embodiment of the present invention comprises a radiofrequency signal sending and receiving end 21, multiple band matching circuit 23, frequency band match Circuit tuning 54, multiple transmitting circuit 25 and multiple receiving lines 27, wherein each transmitting circuit 25 connects radiofrequency signal sending and receiving end 21 respectively by different band matching circuit 23, and receiving lines 27 then connects radiofrequency signal sending and receiving end 21 by frequency band match Circuit tuning 54.
Convenience during in order to illustrate, the band matching circuit 23 of the embodiment of the present invention, launches the quantity of circuit 25 and receiving lines 27 all for two, as shown in Figure 7.Certainly in different embodiments, the quantity of band matching circuit 23, transmitting circuit 25 and receiving lines 27 also can be two or more, as shown in Figure 8.
In embodiments of the present invention, band matching circuit 23 comprises one first band matching circuit 231 and one second band matching circuit 233; Launch circuit 25 and comprise one first transmitting circuit 251 and one second transmitting circuit 253; Receiving lines 27 comprises one first receiving lines 271 and one second receiving lines 273.First launches circuit 251 connects radiofrequency signal sending and receiving end 21 via the first band matching circuit 231, second transmitting 253, circuit connects radiofrequency signal sending and receiving end 21, first receiving lines 271 via the second band matching circuit 233 and the second receiving lines 273 then connects radiofrequency signal sending and receiving end 21 by frequency band match Circuit tuning 54.
The impedance of frequency band match Circuit tuning 54 is can be controlled, in embodiments of the present invention, frequency band match Circuit tuning 54 comprises at least one inductance 541, variable capacitance 543 and a switch element 545, wherein inductance 541 series variable capacitor 543, one end of switch element 545 connects inductance 541 and/or variable capacitance 543, and the other end of switch element 545 then connects ground connection.Inductance 541 and/or variable capacitance 543 whether ground connection is controlled by adjusting the capacitance of variable capacitance 543 and diverter switch unit 545 when practical application, change the impedance of frequency band match Circuit tuning 54, make the radiofrequency signal of frequency band match Circuit tuning 54 pairs of different frequency ranges have different impedances.
Switch element 12 due to prior art need have the characteristic of isolated high-voltage radio-frequency signal, thus effectively cannot reduce volume and the cost of manufacture of switch element 12.Switch element 545 in comparison in frequency band match Circuit tuning 54 of the present invention is in order to switch variable capacitance 543 and inductance 541 whether ground connection, and switch element 545 two ends are without the radiofrequency signal of load high pressure, make the structure of switch element 545 used in the present invention and production method all simpler and easy, and be conducive to reduce make cost.
In an embodiment of reception of the present invention and emitting radio frequency signal, please coordinate with reference to shown in Fig. 9, when wireless transmitter 50 is for by before launching circuit 25 emitting radio frequency signal, the switch element 545 in frequency band match Circuit tuning 54 can be opened, inductance 541 and variable capacitance 543 is made to connect ground connection by switch element 545, as shown at step 61.Can according to the frequency range of launching the radiofrequency signal that circuit 25 tendency to develop is sent, the capacitance of the variable capacitance 543 of adjustment frequency band match Circuit tuning 54, the frequency range of the radiofrequency signal that frequency band match Circuit tuning 54 is sent relative to 25 tendencies to develop of transmitting circuit is high impedance, the radiofrequency signal that transmitting circuit 25 can be avoided to transmit is sent to receiving lines 27 via frequency band match Circuit tuning 54, and the loss of radiofrequency signal can be reduced, as shown in step 62.Then at least one transmitting circuit 25 is via the band matching circuit 23 be connected, and radiofrequency signal is sent to radiofrequency signal sending and receiving end 21, to carry out the action of emission of radio frequency signals, as shown at step 63.
When wireless transmitter 50 for by receiving lines 27 by radiofrequency signal sending and receiving end 21 received RF signal before, the switch element 545 in frequency band match Circuit tuning 54 can be closed, inductance 541 and variable capacitance 543 is made not to connect ground connection, radiofrequency signal sending and receiving end 21 then connects receiving lines 27 via inductance 541 and variable capacitance 543, as shown in step 64.The frequency range of the radiofrequency signal of receiving lines 27 can be delivered to according to radiofrequency signal sending and receiving end 21 tendency to develop, the capacitance of the variable capacitance 543 of adjustment frequency band match Circuit tuning 54, frequency band match Circuit tuning 54 is made to be Low ESR relative to receiving lines 27 for the frequency range of radiofrequency signal connect for receiving, the signal consumption mistake produced in the process of receiving lines 27 is sent to via frequency band match Circuit tuning 54 by radiofrequency signal sending and receiving end 21, as shown at step 65 to reduce radiofrequency signal.Then at least one receiving lines 27 via the frequency band match Circuit tuning 54 be connected by radiofrequency signal sending and receiving end 21 received RF signal, to carry out the action of rf signal reception, as shown in step 66.
State on the invention in embodiment, mainly make receiving lines 27 connect radiofrequency signal sending and receiving end 21 as the embodiment illustrated by frequency band match Circuit tuning 24/54.In different embodiment, please coordinate with reference to shown in Figure 10, the frequency band match Circuit tuning 24/54 of wireless transmitter 500 is arranged on to be launched between circuit 25 and radiofrequency signal sending and receiving end 21, and each receiving lines 27 then connects radiofrequency signal sending and receiving end 21 respectively by different band matching circuit 23.Launch or received RF signal process in, the impedance of adjustable frequency band match Circuit tuning 24/54, the such as capacitance of diverter switch unit 545 and adjustment variable capacitance 543, and can avoid receive or emitting radio frequency signal process in produce the loss of signal.
When wireless transmitter 500 is for by before launching circuit 25 emitting radio frequency signal, the switch element 545 in frequency band match Circuit tuning 54 can be closed, radiofrequency signal sending and receiving end 21 is connected via inductance 541 and variable capacitance 543 and launches circuit 25.According to the frequency range of launching the radiofrequency signal that circuit 25 tendency to develop is sent, the capacitance of the variable capacitance 543 of adjustment frequency band match Circuit tuning 54, making frequency band match Circuit tuning 54 relative to the frequency range of launching the radiofrequency signal that circuit 25 tendencies to develop are sent is Low ESR.Then again by wherein one launching circuit 25, via frequency band match Circuit tuning 54, the radiofrequency signal of this frequency range being sent to radiofrequency signal sending and receiving end 21, radiofrequency signal can be reduced whereby and produce consume by launching circuit 25 and being sent to via frequency band match Circuit tuning 54 in the process of radiofrequency signal sending and receiving end 21.
For passing through receiving lines 27 by before the received RF signal of radiofrequency signal sending and receiving end 21, the switch element 545 in frequency band match Circuit tuning 54 can be opened, make inductance 541 and variable capacitance 543 connect ground connection by switch element 545.According to the frequency range of radiofrequency signal of receiving lines 27 for receiving, the capacitance of the variable capacitance 543 of adjustment frequency band match Circuit tuning 54, makes frequency band match Circuit tuning 54 be high impedance relative to receiving lines 27 institute for the frequency range of the radiofrequency signal of reception.Then radiofrequency signal can be sent to receiving lines 27 via at least one band matching circuit 23 by radiofrequency signal sending and receiving end 21, is sent to transmitting circuit 25 whereby, and causes the loss of radiofrequency signal to reduce the radiofrequency signal received via frequency band match Circuit tuning 54.
State on the invention in embodiment, frequency band match Circuit tuning 54 comprises the series connection of at least one inductance 541 and a variable capacitance 543, and adjusts the impedance of frequency band match Circuit tuning 54 by the capacitance adjusting variable capacitance 543.But in different embodiments, please coordinate with reference to shown in Figure 11, frequency band match Circuit tuning 74 also can comprise a variable inductance 741, at least one electric capacity 743 and a switch element 745, and adjusts the impedance of frequency band match Circuit tuning 74 by the inductance value adjusting variable inductance 741.The mode of operation of switch element 745 is then similar to the mode of operation of the switch element 545 shown in Fig. 7, just repeats no more at this.
Please refer to Figure 12, there is for the present invention the organigram of the another embodiment of wireless transmitter of frequency band match adjustment function.As shown in the figure, wireless transmitter 80 described in the embodiment of the present invention comprises a radiofrequency signal sending and receiving end 21, one first frequency band match Circuit tuning 83, one second frequency band match Circuit tuning 84, multiple transmitting circuit 25 and multiple receiving lines 27, wherein launch circuit 25 and connect radiofrequency signal sending and receiving end 21 by the first frequency band match Circuit tuning 83, receiving lines 27 then connects radiofrequency signal sending and receiving end 21 by the second frequency band match Circuit tuning 84, and the first frequency band match Circuit tuning 83 and the second frequency band match Circuit tuning 84 receive according to wish or the frequency range adjustment impedance of the radiofrequency signal of transmitting, then receive or launch the radiofrequency signal of this frequency range again.
First frequency band match Circuit tuning 83 comprises at least one first inductance 831,1 first variable capacitance 833 and one first switch element 835, wherein the first variable capacitance 833 is connected the first inductance 831, the other end that one end of first switch element 835 connects the first variable capacitance 833 and/or the first inductance 831, first switch element 835 then connects ground connection.Second frequency band match Circuit tuning 84 comprises at least one second inductance 841,1 second variable capacitance 843 and second switch unit 845, wherein the second variable capacitance 843 is connected the second inductance 841, one end of second switch unit 845 connects the second variable capacitance 843 and/or the second inductance 841, and the other end of second switch unit 845 then connects ground connection.
Wireless transmitter 80 is before emitting radio frequency signal, the first switch element 835 can be closed, make to launch circuit 25 and connect radiofrequency signal sending and receiving end 21 by the first inductance 831 and the first variable capacitance 833, in addition also can open second switch unit 845, make radiofrequency signal sending and receiving end 21 connect ground connection via the second inductance 841, second variable capacitance 843 and second switch unit 845.
According to launching the frequency range of circuit 25 for the radiofrequency signal of transmitting, adjust the capacitance of the first variable capacitance 833, the frequency range of the radiofrequency signal that the first frequency band match Circuit tuning 83 is sent relative to 25 tendencies to develop of transmitting circuit is Low ESR, to reduce radiofrequency signal by producing loss in the process of the first frequency band match Circuit tuning 83.
According to the frequency range of the radiofrequency signal for launching, adjust the capacitance of the second variable capacitance 843, making the second frequency band match Circuit tuning 84 relative to the frequency range of launching the radiofrequency signal that circuit 25 tendencies to develop are sent is high impedance.When one of them launches circuit 25 via the first frequency band match Circuit tuning 83 be connected, when radiofrequency signal being sent to radiofrequency signal sending and receiving end 21, the radiofrequency signal of launching can not be sent to receiving lines 27 via the second frequency band match Circuit tuning 84, can be reduced in the loss of signal produced in the process of emitting radio frequency signal.
Wireless transmitter 80 is before received RF signal, the first switch element 835 can be opened, radiofrequency signal sending and receiving end 21 is made to connect ground connection via the first inductance 831, first variable capacitance 833 and the first switch element 835, and second switch unit 845 can be closed, make receiving lines 27 connect radiofrequency signal sending and receiving end 21 by the second inductance 841 and the second variable capacitance 843.
According to the frequency range of receiving lines 27 for the radiofrequency signal of reception, adjust the capacitance of the first variable capacitance 833, make the first frequency band match Circuit tuning 83 relative to receiving lines 27 be high impedance for the frequency range of radiofrequency signal that receives, to be entered by the first frequency band match Circuit tuning 83 launch circuit 25 to reduce the radiofrequency signal that receives, and then cause the loss of radiofrequency signal of reception.
According to the frequency range of receiving lines 27 for the radiofrequency signal of reception, adjust the capacitance of the second variable capacitance 843, make the second frequency band match Circuit tuning 84 relative to receiving lines 27 be Low ESR for the frequency range of radiofrequency signal that receives, to reduce the radiofrequency signal of reception in the loss of signal by producing during the second frequency band match Circuit tuning 84.
Frequency band match Circuit tuning 24/54/74/83/84 of the present invention also can become the band stop filter (notchfilter) that has adjustment function, and in order to the characteristic frequency wave band of filtering one times, twice, three times or any multiples, can reduce the loss of the radiofrequency signal received or launch whereby further.
Connection described in the present invention refers to the direct connection between one or more object or component or indirectly connects, such as, can have one or more intermediate link between one or more object or component.
Described in the system of specification perhaps, must and the not restriction of the present invention of the wording such as change.The technical term that specification uses, mainly in order to carry out the description of specific embodiment, is not restriction of the present invention.Odd number value that specification uses (as one and this) also can be multiple, unless had explicitly bright in specification.A device such as mentioned by specification can include the combination of two or more device, and the material that specification is carried then can include the mixing of many kinds of substance.
The foregoing is only preferred embodiment of the present invention, not be used for limiting scope of the invention process, namely all equalizations of doing according to the shape described in claims of the present invention, structure, feature and spirit change and modify, and all should be included in right of the present invention.
Claims (10)
1. there is a wireless transmitter for frequency band match adjustment function, it is characterized in that, in order to receive and to launch a radiofrequency signal, comprising:
Multiple transmitting circuit;
Multiple receiving lines;
One frequency band match Circuit tuning, connects the plurality of receiving lines or the plurality of transmitting circuit, and foundation receives or the frequency range of the radiofrequency signal of transmitting, adjusts the impedance of this frequency band match Circuit tuning;
Multiple band matching circuit, do not connect the plurality of transmitting circuit of this frequency band match Circuit tuning or the plurality of receiving lines respectively, wherein the plurality of band matching circuit has lower impedance to the radiofrequency signal of different frequency range respectively; And
One radiofrequency signal sending and receiving end, connects this frequency band match Circuit tuning and this band matching circuit;
This frequency band match Circuit tuning comprises a variable capacitance, at least one inductance and a switch element, and this variable capacitance is connected this inductance, and one end of this switch element connects this variable capacitance or this inductance, and the other end of this switch element then connects ground connection;
This variable capacitance of connecting in this frequency band match Circuit tuning and this inductance are arranged on this radiofrequency signal sending and receiving end and receiving lines or launch between circuit;
By adjusting the capacitance of this variable capacitance and switching this switch element and control inductance and/or variable capacitance whether ground connection, change the impedance of this frequency band match Circuit tuning.
2. there is a wireless transmitter for frequency band match adjustment function, it is characterized in that, in order to receive or to launch a radiofrequency signal, comprising:
Multiple transmitting circuit;
Multiple receiving lines;
One first frequency band match Circuit tuning, connects the plurality of transmitting circuit, and adjusts impedance according to the frequency range of this radiofrequency signal;
One second frequency band match Circuit tuning, connects the plurality of receiving lines, and adjusts impedance according to the frequency range of this radiofrequency signal; And
One radiofrequency signal sending and receiving end, connects this first frequency band match Circuit tuning and this second frequency band match Circuit tuning;
This the first frequency band match Circuit tuning comprises one first variable capacitance, at least one first inductance and one first switch element, this first variable capacitance is connected this first inductance, one end of this first switch element connects this first variable capacitance or this first inductance, the other end of this first switch element then connects ground connection, this the second frequency band match Circuit tuning then comprises one second variable capacitance, at least one second inductance and a second switch unit, this second variable capacitance is connected this second inductance, one end of this second switch unit connects this second variable capacitance or this second inductance, the other end of this second switch unit then connects ground connection,
This first variable capacitance of connecting in this first frequency band match adjustment unit and this first inductance are arranged on this radiofrequency signal sending and receiving end and launch between circuit;
This second variable capacitance of connecting in this second frequency band match adjustment unit and this second inductance are arranged between this radiofrequency signal sending and receiving end and receiving lines;
By the capacitance that adjusts this first variable capacitance and this second variable capacitance with switch this first switch element and this second switch unit controls inductance and/or variable capacitance whether ground connection, change the impedance of this frequency band match Circuit tuning.
3. the method for adjustment of the frequency band match of a wireless transmitter, it is characterized in that, this wireless transmitter comprises multiple transmitting circuit, multiple band matching circuit, multiple receiving lines, a frequency band match Circuit tuning and a radiofrequency signal sending and receiving end, this frequency band match Circuit tuning connects this transmitting circuit or this receiving lines, this band matching circuit does not then connect this transmitting circuit or this receiving lines of this frequency band match Circuit tuning, comprises the following steps:
According to the frequency range of the radiofrequency signal for receiving or launch, adjust the impedance of this frequency band match Circuit tuning; And
Receive or launch the radiofrequency signal of this frequency range;
This frequency band match Circuit tuning comprises a variable capacitance, at least one inductance and a switch element, and this variable capacitance connects this inductance, and one end of this switch element connects this variable capacitance or this inductance, and the other end of this switch element then connects ground connection;
This variable capacitance of connecting in this frequency band match Circuit tuning and this inductance are arranged on this radiofrequency signal sending and receiving end and receiving lines or launch between circuit;
By adjusting the capacitance of this variable capacitance and switching this switch element and control inductance and/or variable capacitance whether ground connection, change the impedance of this frequency band match Circuit tuning.
4. the method for adjustment of the frequency band match of wireless transmitter according to claim 3, is characterized in that, this frequency band match Circuit tuning connects this receiving lines, and this band matching circuit then connects this transmitting circuit, and comprises the following steps:
Open this switch element, make this variable capacitance and this inductance connect ground connection via this switch element;
According to the frequency range of this transmitting circuit for this radiofrequency signal of transmitting, adjust the capacitance of this variable capacitance, make this frequency band match Circuit tuning be high impedance relative to the frequency range of this radiofrequency signal of being launched by this transmitting circuit wish; And
Wherein this transmitting circuit is via the band matching circuit connected, and this radiofrequency signal is sent to this radiofrequency signal sending and receiving end.
5. the method for adjustment of the frequency band match of wireless transmitter according to claim 4, is characterized in that, comprises the following steps:
Close this switch element, make this radiofrequency signal sending and receiving end connect this receiving lines via this variable capacitance and this inductance;
According to the frequency range of this receiving lines for this radiofrequency signal of reception, adjust the capacitance of this variable capacitance, make this frequency band match Circuit tuning be Low ESR relative to the frequency range of this radiofrequency signal received by this receiving lines wish; And
This receiving lines receives this radiofrequency signal via this frequency band match Circuit tuning by this radiofrequency signal sending and receiving end.
6. the method for adjustment of the frequency band match of wireless transmitter according to claim 3, is characterized in that, this frequency band match Circuit tuning connects this transmitting circuit, and this band matching circuit then connects this receiving lines, and comprises the following steps:
Close this switch element, make this radiofrequency signal sending and receiving end connect this transmitting circuit via this variable capacitance and this inductance;
According to the frequency range of this transmitting circuit for this radiofrequency signal of transmitting, adjust the capacitance of this variable capacitance, the frequency range of this radiofrequency signal that this frequency band match Circuit tuning is launched relative to this transmitting circuit wish is Low ESR; And
Wherein this transmitting circuit is via this frequency band match Circuit tuning, this radiofrequency signal is sent to this radiofrequency signal sending and receiving end.
7. the method for adjustment of the frequency band match of wireless transmitter according to claim 6, is characterized in that, comprises the following steps:
Open this switch element, make this variable capacitance and this inductance connect ground connection via this switch element;
According to the frequency range of this receiving lines for this radiofrequency signal of reception, adjust the capacitance of this variable capacitance, the frequency range of this radiofrequency signal that this frequency band match Circuit tuning is received relative to this receiving lines wish is high impedance; And
This radiofrequency signal is sent to this receiving lines via wherein this band matching circuit by this radiofrequency signal sending and receiving end.
8. the method for adjustment of the frequency band match of a wireless transmitter, it is characterized in that, this wireless transmitter comprises multiple transmitting circuit, multiple receiving lines, one first frequency band match Circuit tuning, one second frequency band match Circuit tuning and a radiofrequency signal sending and receiving end, this the first frequency band match Circuit tuning and this second frequency band match Circuit tuning connect this transmitting circuit and this receiving lines respectively, and comprise the following steps:
According to the frequency range of the radiofrequency signal for receiving or launch, adjust the impedance of this first frequency band match Circuit tuning and this second frequency band match Circuit tuning; And
Receive or launch the radiofrequency signal of this frequency range;
This the first frequency band match Circuit tuning comprises one first variable capacitance, at least one first inductance and one first switch element, this first variable capacitance connects this first inductance, one end of this first switch element connects this first variable capacitance or this first inductance, the other end of this first switch element then connects ground connection, and this second frequency band match Circuit tuning comprises one second variable capacitance, at least one second inductance and a second switch unit, this second variable capacitance connects this second inductance, one end of this second switch unit connects this second variable capacitance or this second inductance, the other end of this second switch unit then connects ground connection,
This first variable capacitance of connecting in this first frequency band match adjustment unit and this first inductance are arranged on this radiofrequency signal sending and receiving end and launch between circuit;
This second variable capacitance of connecting in this second frequency band match adjustment unit and this second inductance are arranged between this radiofrequency signal sending and receiving end and receiving lines;
By the capacitance that adjusts this first variable capacitance and this second variable capacitance with switch this first switch element and this second switch unit controls inductance and/or variable capacitance whether ground connection, change the impedance of this frequency band match Circuit tuning.
9. the method for adjustment of the frequency band match of wireless transmitter according to claim 8, is characterized in that, comprises the following steps:
Close this first switch element;
Open this second switch unit, make this radiofrequency signal sending and receiving end connect ground connection via this second variable capacitance, this second inductance and second switch unit;
According to the frequency range of this transmitting circuit for this radiofrequency signal of transmitting, adjust the capacitance of this first variable capacitance and this second variable capacitance, the frequency range of this radiofrequency signal that this first frequency band match Circuit tuning is launched relative to this transmitting circuit wish is Low ESR, and the frequency range of this radiofrequency signal that this second frequency band match Circuit tuning is launched relative to this transmitting circuit wish is high impedance; And
Wherein this transmitting circuit is via the first frequency band match Circuit tuning be connected, and this radiofrequency signal is sent to this radiofrequency signal sending and receiving end.
10. the method for adjustment of the frequency band match of wireless transmitter according to claim 8, is characterized in that, comprises the following steps:
Open this first switch element, make this radiofrequency signal sending and receiving end connect ground connection via this first variable capacitance, this first inductance and this first switch element;
Close this second switch unit;
According to the frequency range of this receiving lines for this radiofrequency signal of reception, adjust the capacitance of this first variable capacitance and this second variable capacitance, the frequency range of this radiofrequency signal that this first frequency band match Circuit tuning is received relative to this receiving lines wish is high impedance, and the frequency range of this radiofrequency signal that this second frequency band match Circuit tuning is received relative to this receiving lines wish is Low ESR; And
Wherein this receiving lines receives this radiofrequency signal via this second frequency band match Circuit tuning by this radiofrequency signal sending and receiving end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410041256.7A CN103795431B (en) | 2014-01-28 | 2014-01-28 | There is wireless transmitter and the method for adjustment thereof of frequency band match adjustment function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410041256.7A CN103795431B (en) | 2014-01-28 | 2014-01-28 | There is wireless transmitter and the method for adjustment thereof of frequency band match adjustment function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103795431A CN103795431A (en) | 2014-05-14 |
| CN103795431B true CN103795431B (en) | 2016-02-17 |
Family
ID=50670792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410041256.7A Active CN103795431B (en) | 2014-01-28 | 2014-01-28 | There is wireless transmitter and the method for adjustment thereof of frequency band match adjustment function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103795431B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI112561B (en) * | 1999-06-10 | 2003-12-15 | Nokia Corp | Transmitter / receiver for transmitting and receiving RF signal on at least two frequency ranges |
| CN201479119U (en) * | 2009-02-25 | 2010-05-19 | 惠州Tcl移动通信有限公司 | Radio-frequency signal processing device and terminal |
| CN102510297A (en) * | 2011-11-04 | 2012-06-20 | 中兴通讯股份有限公司 | Power amplification module, multi-mode radio frequency transceiver, duplexer and multi-mode terminal |
| CN202713287U (en) * | 2012-05-18 | 2013-01-30 | 青岛海信移动通信技术股份有限公司 | Radio frequency circuit and mobile communication terminal |
| CN103227657B (en) * | 2013-03-25 | 2015-05-20 | 络达科技股份有限公司 | Radio frequency front-end module |
| CN103338054B (en) * | 2013-06-09 | 2017-11-28 | 华为终端（东莞）有限公司 | Multifrequency community antenna system, radio-frequency front-end and multi-band communication device |
-
2014
- 2014-01-28 CN CN201410041256.7A patent/CN103795431B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103795431A (en) | 2014-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9799444B2 (en) | Reconfigurable directional coupler | |
| US20150188225A1 (en) | Antenna assembly and wireless communication device using the same | |
| CN103957024B (en) | Radio frequency transmitting and receiving switch and operating method thereof | |
| WO2015124090A1 (en) | Radio-frequency circuit and terminal device | |
| CN101312354A (en) | Aerial matching circuit and aerial matching method | |
| CN102611393B (en) | Radio frequency power amplifier system having waveband switching function | |
| CN103904433A (en) | Tunable multi-band antenna and wireless communication device | |
| CN105720339A (en) | Dual-band adjustable band-pass filter | |
| CN103227657B (en) | Radio frequency front-end module | |
| CN202759442U (en) | Radio frequency front-end circuit of multifrequency terminal and multifrequency terminal | |
| CN107493082A (en) | A kind of dual-passband amplifier | |
| CN203522706U (en) | Multi-band frequency source | |
| CN104993235A (en) | Antenna apparatus and electronic equipment | |
| CN103856271A (en) | Adjustable harmonic wave filtering device | |
| CN105762487B (en) | A kind of aerial matching method, antenna assembly and mobile terminal based on mobile terminal | |
| CN108172956B (en) | A kind of microwave combiner | |
| CN106374964A (en) | Wireless communication module and radiation emission reduction method thereof | |
| CN103795431B (en) | There is wireless transmitter and the method for adjustment thereof of frequency band match adjustment function | |
| CN108206331B (en) | Antenna device and mobile terminal thereof | |
| CN104320101A (en) | Antenna self-adaptation control matching circuit | |
| CN104202009A (en) | Distributed matching circuit | |
| CN105871408A (en) | Front-end circuit of radio-frequency chip and signal transmission method | |
| WO2015085594A1 (en) | Transmitter | |
| TWI544754B (en) | A wireless transceiver device with frequency band matching adjustment function and its adjustment method | |
| CN208353306U (en) | Gain circuitry |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Science Park, Hsinchu, Taiwan, China Road 6-5, building 5 Patentee after: Dafa Technology Co.,Ltd. Address before: Science Park, Hsinchu, Taiwan, China Road 6-5, building 5 Patentee before: AIROHA TECHNOLOGY CORP. |