CN103795431B - Wireless transceiver device with frequency band matching adjustment function and adjustment method thereof - Google Patents

Abstract

The invention provides a wireless transceiver with frequency band matching adjustment function and an adjustment method thereof, mainly comprising a plurality of transmitting circuits, a plurality of receiving circuits, a frequency band matching adjustment circuit and a radio frequency signal transceiving end, wherein the transmitting circuits and/or the receiving circuits are connected with the radio frequency signal transceiving end through the frequency band matching adjustment circuit. When (before) the radio frequency signal is transmitted or received, the impedance of the frequency band matching adjusting circuit can be adjusted according to the frequency band of the radio frequency signal, so that the frequency band matching adjusting circuit is high impedance or low impedance relative to the frequency band of the received or transmitted radio frequency signal, and the loss of the radio frequency signal during the receiving or transmitting process is reduced.

Description

Wireless transceiver device with frequency band matching adjustment function and adjustment method thereof

technical field

The invention relates to a wireless transceiver device with a frequency band matching adjustment function and an adjustment method thereof, which can reduce the loss of radio frequency signals during reception or transmission.

Background technique

Please refer to FIG. 1 , which is a schematic block diagram of a conventional wireless transceiver device. The wireless transceiver device (transceiver) 10 is used to transmit and receive wireless signals, and includes an antenna unit 11, a plurality of radio frequency switch units 12, a plurality of transmitting matching units 13, a plurality of receiving matching units 14, a plurality of transmitting lines 15 and a plurality of A receiving line 17, wherein the antenna unit 11 is connected to the transmitting line 15 through a part of the radio frequency switch unit 12 and the transmitting matching unit 13, and is connected to the receiving line 17 through other radio frequency switching units 12 and the receiving matching unit 14.

When the radio frequency signal is transmitted by the wireless transceiver device 10, the first radio frequency switch unit 121 can be turned on, so that the first transmission line 151 is connected to the antenna unit 11 through the first transmission matching unit 131 and the first radio frequency switch unit 121, and the radio frequency signal is transmitted to the antenna unit 11. When the first radio frequency switch unit 121 is turned on, the second radio frequency switch unit 123, the third radio frequency switch unit 125 and the fourth radio frequency switch unit 127 will be closed, thereby isolating the second transmission line 153, the first reception line 171 and the The second receiving line 173 is used to improve the efficiency of transmitting radio frequency signals from the first transmitting line 151 to the antenna unit 11 .

When transmitting radio frequency signals of different frequency bands, the second radio frequency switch unit 123 can be turned on, and the first radio frequency switch unit 121, the third radio frequency switch unit 125 and the fourth radio frequency switch unit 127 can be closed, so that the radio frequency signal is transmitted by the second transmission line 153 is transmitted to the antenna unit 11 through the second transmission matching unit 133 and the second radio frequency switch unit 123 .

When receiving a radio frequency signal, the third radio frequency switch unit 125 can be turned on, and the first radio frequency switch unit 121, the second radio frequency switch unit 123 and the fourth radio frequency switch unit 127 can be turned off, so that the radio frequency signal received by the antenna unit 11 passes through the first radio frequency switch unit The three radio frequency switch units 125 and the first receiving matching unit 141 transmit to the first receiving circuit 171 . In addition, the fourth radio frequency switch unit 127 can be turned on, and the first radio frequency switch unit 121, the second radio frequency switch unit 123 and the third radio frequency switch unit 125 can be turned off, so that the radio frequency signal received by the antenna unit 11 passes through the fourth radio frequency switch unit 127 And the second receiving matching unit 143 transmits to the second receiving circuit 173, so as to receive radio frequency signals of different frequency bands.

By switching each radio frequency switch unit 12 of the wireless transceiver device 10, radio frequency signal reception and transmission can be performed. However, the wireless transceiver device 10 needs to be provided with a plurality of radio frequency switch units 12 , a plurality of transmitting matching units 13 and a plurality of receiving matching units 14 , so that the area and manufacturing cost of the wireless transceiver device 10 cannot be effectively reduced. In addition, during the process of transmitting or receiving a radio frequency signal, the radio frequency signal will pass through a radio frequency switch unit 12, resulting in loss of the radio frequency signal.

Contents of the invention

An object of the present invention is to provide a wireless transceiver device with a frequency band matching adjustment function, which mainly includes a plurality of receiving lines, a plurality of transmitting lines, a radio frequency signal transceiver end, a frequency band matching adjustment circuit and a plurality of frequency band matching circuits, The frequency band matching adjustment circuit is connected to the receiving line or the transmitting line, and the frequency band matching circuit is connected to the receiving line or the transmitting line not connected to the frequency band matching adjustment circuit. During the process of transmitting or receiving radio frequency signals, the frequency band matching adjustment circuit adjusts the impedance according to the frequency band of the radio frequency signals, thereby reducing the loss of the received or transmitted radio frequency signals.

An object of the present invention is to provide a wireless transceiver device with a frequency band matching adjustment function, which mainly includes a plurality of receiving lines, a plurality of transmitting lines, a radio frequency signal transceiver end, a first frequency band matching adjustment circuit and a second frequency band The matching adjustment circuit, wherein the first frequency band matching adjustment circuit is connected to the receiving line, and the second frequency band matching adjustment circuit is connected to the transmitting line. During the process of transmitting or receiving radio frequency signals, the first frequency band matching adjustment circuit and the second frequency band matching adjustment circuit adjust the impedance according to the frequency band of the radio frequency signal, so as to reduce the loss of the received or transmitted radio frequency signal.

An object of the present invention is to provide a method for adjusting the frequency band matching of a wireless transceiver device, which mainly adjusts the impedance of the frequency band matching adjustment circuit connected to the receiving line and/or the transmitting line according to the frequency band of the received or transmitted radio frequency signal, so that the frequency band The matching adjustment circuit has high impedance or low impedance relative to the frequency band of the received or transmitted radio frequency signal, thereby reducing the loss of the received or transmitted radio frequency signal.

An object of the present invention is to provide a method for adjusting the frequency band matching of a wireless transceiver device, which mainly adjusts the frequency band matching adjustment circuit connected to the receiving line and/or the transmitting line according to the frequency band of the received or transmitted radio frequency signal, so that the frequency band matching adjustment The circuit becomes a band-stop filter (notch filter) with adjustment function, and can be used to filter out a specific frequency band signal of one time, two times, three times or any multiple.

In order to achieve the above object, the present invention provides a wireless transceiver device with a frequency band matching adjustment function, which is used to receive and transmit a radio frequency signal, including: a plurality of transmitting lines; a plurality of receiving lines; a frequency band matching adjustment circuit, connected to a plurality of The receiving line or multiple transmitting lines, and adjust the impedance of the frequency band matching adjustment circuit according to the frequency band of the received or transmitted radio frequency signal; multiple frequency band matching circuits are respectively connected to multiple transmitting lines or multiple receiving lines that are not connected to the frequency band matching adjustment circuit A circuit, wherein a plurality of frequency band matching circuits respectively have lower impedances to radio frequency signals of different frequency bands; and a radio frequency signal transceiver end connected to the frequency band matching adjustment circuit and the frequency band matching circuit.

In addition, the present invention also provides another wireless transceiver device with a frequency band matching adjustment function, which is used to receive or transmit a radio frequency signal, including: a plurality of transmitting lines; a plurality of receiving lines; a first frequency band matching adjustment circuit, connected to multiple a transmitting line, and adjust the impedance according to the frequency band of the radio frequency signal; a second frequency band matching adjustment circuit, connected to multiple receiving lines, and adjust the impedance according to the frequency band of the radio frequency signal; and a radio frequency signal receiving end, connected to the first frequency band matching adjustment circuit And the second frequency band matching adjustment circuit.

The present invention also provides a method for adjusting frequency band matching of a wireless transceiver device, wherein the wireless transceiver device includes a plurality of transmitting lines, a plurality of frequency band matching circuits, a plurality of receiving lines, a frequency band matching adjustment circuit and a radio frequency signal transceiver end, the frequency band The matching adjustment circuit is connected to the transmitting line or the receiving line, and the frequency band matching circuit is connected to the transmitting line or the receiving line not connected to the frequency band matching adjustment circuit, including the following steps: adjusting the frequency band matching adjustment circuit according to the frequency band of a radio frequency signal to be received or transmitted Impedance; and receive or transmit radio frequency signals.

The present invention also provides another method for adjusting frequency band matching of a wireless transceiver device, wherein the wireless transceiver device includes a plurality of transmitting lines, a plurality of receiving lines, a first frequency band matching adjustment circuit, a second frequency band matching adjustment circuit and a radio frequency The signal transceiver end, the first frequency band matching adjustment circuit and the second frequency band matching adjustment circuit are respectively connected to the transmitting line and the receiving line, and includes the following steps: according to the frequency band of a radio frequency signal to be received or transmitted, adjusting the first frequency band matching adjustment circuit and Impedance of the second frequency band matching adjustment circuit; and receiving or transmitting radio frequency signals of the frequency band

In an embodiment of the wireless transceiver device of the present invention, the frequency band matching adjustment circuit includes a variable capacitor, at least one inductor and a switch unit, the variable capacitor is connected in series with the inductor, one end of the switch unit is connected to the variable capacitor or inductor, and the switch unit The other end is connected to ground.

In an embodiment of the wireless transceiver device of the present invention, the frequency band matching adjustment circuit adjusts the impedance through a variable capacitor and a switch unit.

In an embodiment of the wireless transceiver device of the present invention, the frequency band matching adjustment circuit includes at least one capacitor, a variable inductor and a switch unit, the capacitor is connected in series with the variable inductor, and one end of the switch unit is connected to the variable inductor or capacitor. The other end of the switch unit is connected to ground.

In an embodiment of the wireless transceiver device of the present invention, the first frequency band matching adjustment circuit includes a first variable capacitor, at least one first inductor and a first switch unit, the first variable capacitor is connected in series with the first inductor, and the first One end of the switch unit is connected to the first variable capacitor or the first inductor, the other end of the first switch unit is connected to the ground, and the second frequency band matching adjustment circuit includes a second variable capacitor, at least one second inductor and a first Two switch units, the second variable capacitor is connected in series with the second inductor, one end of the second switch unit is connected to the second variable capacitor or the second inductor, and the other end of the second switch unit is connected to ground.

In an embodiment of the adjustment method of the present invention, the frequency band matching adjustment circuit includes a variable capacitor, at least one inductor and a switch unit, the variable capacitor is connected to the inductor, one end of the switch unit is connected to the variable capacitor or inductor, and the switch unit The other end is connected to ground.

In an embodiment of the adjustment method of the present invention, wherein the frequency band matching adjustment circuit is connected to the receiving line, and the frequency band matching circuit is connected to the transmitting line, and includes the following steps: turning on the switch unit, so that the variable capacitor and the inductor are connected to ground through the switch unit; The frequency band of the radio frequency signal to be transmitted by the transmission line, adjust the capacitance value of the variable capacitor, so that the frequency band matching adjustment circuit is high impedance relative to the frequency band of the radio frequency signal to be transmitted by the transmission line; and one of the transmission lines is connected via the frequency band matching circuit , to transmit the radio frequency signal to the radio frequency signal transceiver end.

In an embodiment of the adjustment method of the present invention, the following steps are included: closing the switch unit, so that the radio frequency signal transceiver end is connected to the receiving line via a variable capacitor and an inductance; adjusting the capacitance of the variable capacitor according to the frequency band of the radio frequency signal to be received by the receiving line value, so that the frequency band matching adjustment circuit has a low impedance relative to the frequency band of the radio frequency signal to be received by the receiving line; and the receiving line receives the radio frequency signal from the radio frequency signal transceiver end through the frequency band matching adjustment circuit.

In an embodiment of the adjustment method of the present invention, the frequency band matching adjustment circuit is connected to the transmitting line, and the frequency band matching circuit is connected to the receiving line, and includes the following steps: closing the switch unit, so that the radio frequency signal receiving end is connected to the transmitting line via a variable capacitor and an inductance line; adjust the capacitance value of the variable capacitor according to the frequency band of the radio frequency signal to be transmitted by the transmission line, so that the frequency band matching adjustment circuit is low impedance relative to the frequency band of the radio frequency signal to be transmitted by the transmission line; and one of the transmission lines is adjusted by frequency band matching The circuit transmits the radio frequency signal to the radio frequency signal transceiver end.

In an embodiment of the adjustment method of the present invention, the following steps are included: turn on the switch unit, so that the variable capacitor and the inductor are connected to the ground through the switch unit; adjust the capacitance value of the variable capacitor according to the frequency band of the radio frequency signal to be received by the receiving line, so that The frequency band matching adjustment circuit is high impedance relative to the frequency band of the radio frequency signal to be received by the receiving line; and the radio frequency signal transceiver end transmits the radio frequency signal to the receiving line through one of the frequency band matching circuits.

In an embodiment of the adjustment method of the present invention, the first frequency band matching adjustment circuit includes a first variable capacitor, at least one first inductor, and a first switch unit, the first variable capacitor is connected to the first inductor, and the first switch One end of the unit is connected to the first variable capacitor or the first inductor, the other end of the first switch unit is connected to the ground, and the second frequency band matching adjustment circuit includes a second variable capacitor, at least one second inductor and a second switch unit, the second variable capacitor is connected to the second inductor, one end of the second switch unit is connected to the second variable capacitor or the second inductor, and the other end of the second switch unit is connected to ground.

In an embodiment of the adjustment method of the present invention, the following steps are included: closing the first switch unit; opening the second switch unit, so that the radio frequency signal transceiver end is connected to ground through the second variable capacitor, the second inductor and the second switch unit; according to The frequency band of the radio frequency signal to be transmitted by the transmission line, adjust the capacitance values of the first variable capacitor and the second variable capacitor, so that the first frequency band matching adjustment circuit is low impedance relative to the frequency band of the radio frequency signal to be transmitted by the transmission line, and make The second frequency band matching adjustment circuit has high impedance relative to the frequency band of the radio frequency signal to be transmitted by the transmission line; and one of the transmission lines transmits the radio frequency signal to the radio frequency signal receiving end through the connected first frequency band matching adjustment circuit.

In an embodiment of the adjustment method of the present invention, the following steps are included: turning on the first switch unit, so that the radio frequency signal transceiver end is connected to ground through the first variable capacitor, the first inductor and the first switch unit; closing the second switch unit; The frequency band of the radio frequency signal to be received by the receiving line is adjusted, and the capacitance values of the first variable capacitor and the second variable capacitor are adjusted so that the first frequency band matching adjustment circuit is high impedance relative to the frequency band of the radio frequency signal to be received by the receiving line, and the The second frequency band matching adjustment circuit has low impedance relative to the frequency band of the radio frequency signal to be received by the receiving line; and one of the receiving lines receives the radio frequency signal from the radio frequency signal transceiver end through the second frequency band matching adjustment circuit.

Description of drawings

FIG. 1 is a schematic block diagram of an existing wireless transceiver;

FIG. 2 is a structural schematic diagram of an embodiment of a wireless transceiver device with a frequency band matching adjustment function according to the present invention;

FIG. 3 is a flow chart of the steps of an embodiment of an adjustment method for frequency band matching of the wireless transceiver device of the present invention;

FIG. 4 is a structural schematic diagram of another embodiment of a wireless transceiver device with a frequency band matching adjustment function according to the present invention;

FIG. 5 is a flow chart of the steps of another embodiment of the frequency band matching adjustment method of the wireless transceiver device of the present invention;

FIG. 6 is a schematic structural diagram of another embodiment of a wireless transceiver device with a frequency band matching adjustment function according to the present invention;

FIG. 7 is a schematic structural diagram of another embodiment of a wireless transceiver device with a frequency band matching adjustment function according to the present invention;

FIG. 8 is a structural schematic diagram of another embodiment of a wireless transceiver device with a frequency band matching adjustment function according to the present invention;

FIG. 9 is a flow chart of the steps of another embodiment of the frequency band matching adjustment method of the wireless transceiver device of the present invention;

FIG. 10 is a schematic structural diagram of another embodiment of a wireless transceiver device with a frequency band matching adjustment function according to the present invention;

FIG. 11 is a structural schematic diagram of another embodiment of a wireless transceiver device with a frequency band matching adjustment function according to the present invention; and

FIG. 12 is a schematic structural diagram of another embodiment of a wireless transceiver device with a frequency band matching adjustment function according to the present invention.

While specific embodiments of the invention have been shown by way of example in the drawings and described in detail herein, the invention is susceptible to various modifications and alternative forms. The content of the accompanying drawings of the present invention may be in different proportions, and the accompanying drawings and their detailed descriptions are only disclosures of specific types, and are not intended to limit the present invention. On the contrary, modifications and equalization are made within the spirit and scope of the claims Components and their replacements are within the scope of the present invention.

reference sign

10: Wireless transceiver device 11: Antenna unit

12: radio frequency switch unit 121: first radio frequency switch unit

123: second radio frequency switch unit 125: third radio frequency switch unit

127: fourth radio frequency switch unit 13: transmitting matching unit

131: the first transmission matching unit 133: the second transmission matching unit

14: receiving matching unit 141: the first receiving matching unit

143: second receiving matching unit 15: transmitting line

151: the first transmission line 153: the second transmission line

17: Receive line 171: First receive line

173: Second receiving line

20: Wireless transceiver device 21: RF signal transceiver

22: Antenna unit 23: Frequency band matching circuit

231: first frequency band matching circuit 233: second frequency band matching circuit

24: Frequency band matching adjustment circuit 25: Transmission line

251: the first transmission line 253: the second transmission line

27: Receiving line 271: First receiving line

273: second receiving line 29: amplifier

50: wireless transceiver device 500: wireless transceiver device

54: Frequency band matching adjustment circuit 541: Inductor

543: variable capacitor 545: switch unit

74: Frequency band matching adjustment circuit 741: Variable inductance

743: capacitor 745: switch unit

80: wireless transceiver

83: The first frequency band matching adjustment circuit

831: first inductor 833: first variable capacitor

835: First switch unit

84: Second frequency band matching adjustment circuit

841: second inductance 843: second variable capacitor

845: Second switch unit

detailed description

Please refer to FIG. 2 , which is a structural diagram of an embodiment of a wireless transceiver device with a frequency band matching adjustment function according to the present invention. As shown in the figure, the wireless transceiver device 20 according to the embodiment of the present invention includes a radio frequency signal transceiver terminal 21, a plurality of frequency band matching circuits 23, a frequency band matching adjustment circuit 24, a plurality of transmitting lines 25 and a plurality of receiving lines 27, The frequency band matching adjustment circuit 24 is connected to multiple receiving lines 27 or multiple transmitting lines 25 , while the multiple frequency band matching circuits 23 are respectively connected to multiple transmitting lines 25 or multiple receiving lines 27 not connected to the frequency band matching adjustment circuit 24 . In this embodiment, the receiving line 27 is connected to the radio frequency signal transceiver end 21 through the frequency band matching adjustment circuit 24 , and each transmitting line 25 is connected to the radio frequency signal transceiver end 21 through different frequency band matching circuits 23 .

The impedance of the frequency band matching adjustment circuit 24 can be adjusted. In an embodiment of the present invention, please refer to FIG. 3 , the frequency band connected to the receiving line 27 or the transmitting line 25 can be adjusted according to the frequency band of the radio frequency signal to be received or transmitted. Match the impedance of the adjustment circuit 24 , as shown in step 31 . After the impedance adjustment of the frequency band matching adjustment circuit 24 is completed, the radio frequency signal of the frequency band can be received or transmitted, as shown in step 33 .

For the convenience of description, the frequency band matching circuit 23, the number of transmitting lines 25 and the number of receiving lines 27 in the embodiment of the present invention are all taken as two examples. In addition, the radio frequency signal transceiver end 21 can also be connected to an antenna unit 22, and through the antenna The unit 22 transmits or receives radio frequency signals, as shown in FIG. 2 . Of course, in different embodiments, the number of the frequency band matching circuit 23 , the transmitting line 25 and the receiving line 27 can also be more than two, as shown in FIG. 4 .

In the embodiment of the present invention, the frequency band matching circuit 23 includes a first frequency band matching circuit 231 and a second frequency band matching circuit 233; the transmitting line 25 includes a first transmitting line 251 and a second transmitting line 253; the receiving line 27 then It includes a first receiving circuit 271 and a second receiving circuit 273 . The first transmission line 251 is connected to the radio frequency signal transceiver end 21 through the first frequency band matching circuit 231, the second transmission line 253 is connected to the radio frequency signal transceiver end 21 through the second frequency band matching circuit 233, and the first receiving line 271 and the second receiving line 273 are all connected to the RF signal transceiver end 21 through the frequency band matching adjustment circuit 24 .

The first frequency band matching circuit 231 and the second frequency band matching circuit 233 have different or lower impedances to radio frequency signals of different frequency bands. In an embodiment of the present invention, the first frequency band matching circuit 231 has a low impedance to the RF signal of the first frequency band, and the second frequency band matching circuit 233 has a high impedance to the RF signal of the first frequency band. On the contrary, the second frequency band matching circuit 233 has a low impedance to the RF signal of the second frequency band, and the first frequency band matching circuit 231 has a high impedance to the RF signal of the second frequency band. The first frequency band and the second frequency band may be multiples, for example, if the first frequency band is a radio frequency signal of 900 MHz, then the second frequency band may be a radio frequency signal of 1800 MHz.

In an embodiment of the present invention, the first transmitting line 251 is used to transmit radio frequency signals of the first frequency band, since the first frequency band matching circuit 231 has low impedance to the radio frequency signals of the first frequency band, and the first transmitting line 251 is compatible with the radio frequency signals No switch unit is provided between the transceiver terminals 21 , so the signal loss generated during the process of the first transmission line 251 transmitting the RF signal to the RF signal transceiver terminal 21 can be reduced. In addition, the second frequency band matching circuit 233 has a high impedance to the radio frequency signal of the first frequency band generated by the first transmission line 251, which can also prevent the radio frequency signal of the first frequency band from being transmitted to the second transmission line 253 through the second frequency band matching circuit 233. , which is also beneficial to reduce the loss of the radio frequency signal in the first frequency band.

In an embodiment of the present invention, the second transmission line 253 can be used to transmit radio frequency signals of the second frequency band, because the second frequency band matching circuit 233 has low impedance to the radio frequency signals of the second frequency band, and the second transmission line 253 and the radio frequency signal No switch unit is provided between the transceiver terminals 21 , so the signal loss generated during the process of transmitting the RF signal to the RF signal transceiver terminal 21 by the second transmission line 253 can be reduced. In addition, the first frequency band matching circuit 231 is high impedance to the radio frequency signal of the second frequency band generated by the second transmission line 253, which can prevent the radio frequency signal of the second frequency band from being transmitted to the first transmission line 251 through the first frequency band matching circuit 231, and also It is beneficial to reduce the loss of the radio frequency signal of the second frequency band.

In a more detailed embodiment of receiving and transmitting radio frequency signals of the present invention, please refer to that shown in FIG. Impedance, so that the frequency band matching adjustment circuit 24 has a high impedance relative to the frequency band of the radio frequency signal to be transmitted by the transmitting line 25, as shown in step 41.

At least one transmission line 25 transmits a radio frequency signal of a specific frequency band to the radio frequency transceiver end 21 via the connected frequency band matching circuit 23 , as shown in step 43 . Since the frequency band matching adjustment circuit 24 is high impedance relative to the frequency band of the radio frequency signal transmitted by the transmission line 25, the radio frequency signal transmitted by the radio frequency line 25 will not be transmitted to the receiving line 27 through the frequency band matching adjustment circuit 24, and the transmission line can be reduced. 25 Signal loss generated during the process of transmitting the radio frequency signal to the radio frequency signal transceiver end 21 .

In one embodiment of the present invention, if the first transmission line 251 intends to transmit a radio frequency signal of the first frequency band, the impedance of the frequency band matching adjustment circuit 24 can be adjusted so that the frequency band matching adjustment circuit 24 has a high impedance to the radio frequency signal of the first frequency band In order to prevent the radio frequency signal of the first frequency band from being transmitted to the receiving circuit 27 through the frequency band matching adjustment circuit 24 . Conversely, if the second transmission line 253 intends to transmit the radio frequency signal of the second frequency band, the impedance of the frequency band matching adjustment circuit 24 can be adjusted so that the frequency band matching adjustment circuit 24 is high impedance to the radio frequency signal of the second frequency band, so as to avoid the second frequency band The radio frequency signal is transmitted to the receiving line 27 through the frequency band matching adjustment circuit 24 .

In addition, the impedance of the frequency band matching adjustment circuit 24 connected to the receiving line 27 can also be adjusted according to the frequency band of the radio frequency signal that the radio frequency signal transceiver terminal 21 intends to transmit to the receiving line 27, so that the frequency band matching adjustment circuit 24 is relative to the frequency band that the receiving line 27 wants to receive. The frequency band of the RF signal is low impedance. For example, the impedance of the frequency band matching adjustment circuit 24 is adjusted so that the frequency band matching adjustment circuit 24 has a low impedance for the RF signal of the first frequency band or the second frequency band, as shown in step 45 .

At least one receiving circuit 27 receives a radio frequency signal of a specific frequency band from the radio frequency transceiver end 21 via the connected frequency band matching adjustment circuit 24 , as shown in step 47 . Since the frequency band matching adjustment circuit 24 has a low impedance relative to the frequency band of the radio frequency signal received by the receiving line 27, the signal loss generated during the process of the radio frequency signal transceiver terminal 21 transmitting the radio frequency signal to the receiving line 27 through the frequency band matching adjustment circuit 24 can be reduced. .

In an embodiment of the present invention, each transmitting line 25 can also be connected to an amplifier 29 respectively, as shown in FIG. The amplifier 29 prevents the received radio frequency signal from being transmitted to the transmission line 25, and also avoids possible signal loss during the process of receiving the radio frequency signal.

Please refer to FIG. 7 , which is a schematic structural diagram of another embodiment of a wireless transceiver device with a frequency band matching adjustment function according to the present invention. As shown in the figure, the wireless transceiver device 50 according to the embodiment of the present invention includes a radio frequency signal transceiver terminal 21, a plurality of frequency band matching circuits 23, a frequency band matching adjustment circuit 54, a plurality of transmitting lines 25 and a plurality of receiving lines 27, Each transmitting line 25 is connected to the radio frequency signal receiving end 21 through a different frequency band matching circuit 23 , and the receiving line 27 is connected to the radio frequency signal receiving end 21 through a frequency band matching adjustment circuit 54 .

For the convenience of description, the number of the frequency band matching circuit 23 , the transmission line 25 and the number of the reception line 27 in the embodiment of the present invention is taken as an example, as shown in FIG. 7 . Of course, in different embodiments, the number of the frequency band matching circuit 23 , the transmitting line 25 and the receiving line 27 may be more than two, as shown in FIG. 8 .

In the embodiment of the present invention, the frequency band matching circuit 23 includes a first frequency band matching circuit 231 and a second frequency band matching circuit 233; the transmitting line 25 includes a first transmitting line 251 and a second transmitting line 253; the receiving line 27 then It includes a first receiving circuit 271 and a second receiving circuit 273 . The first transmission line 251 is connected to the radio frequency signal transceiver end 21 through the first frequency band matching circuit 231, the second transmission line 253 is connected to the radio frequency signal transceiver end 21 through the second frequency band matching circuit 233, and the first receiving line 271 and the second receiving line 273 is connected to the radio frequency signal transceiver end 21 through the frequency band matching adjustment circuit 54 .

The impedance of the frequency band matching adjustment circuit 54 can be adjusted. In the embodiment of the present invention, the frequency band matching adjustment circuit 54 includes at least one inductor 541, a variable capacitor 543 and a switch unit 545, wherein the inductor 541 is connected in series with the variable capacitor 543 One end of the switch unit 545 is connected to the inductor 541 and/or the variable capacitor 543 , and the other end of the switch unit 545 is connected to the ground. In actual application, the impedance of the frequency band matching adjustment circuit 54 can be changed by adjusting the capacitance value of the variable capacitor 543 and switching the switch unit 545 to control whether the inductance 541 and/or the variable capacitor 543 are grounded, so that the frequency band matching adjustment circuit 54 is different. RF signals in different frequency bands have different impedances.

Since the switch unit 12 in the prior art needs to have the characteristic of isolating high-voltage radio frequency signals, the size and manufacturing cost of the switch unit 12 cannot be effectively reduced. In contrast, the switch unit 545 in the frequency band matching adjustment circuit 54 of the present invention is used to switch whether the variable capacitor 543 and the inductor 541 are grounded, and the two ends of the switch unit 545 do not need to load high-voltage radio frequency signals, so that the present invention uses The structure and manufacturing method of the switch unit 545 are relatively simple, which is beneficial to reduce the manufacturing cost.

In an embodiment of the present invention for receiving and transmitting radio frequency signals, please refer to FIG. 9 , when the wireless transceiver device 50 intends to transmit radio frequency signals through the transmission line 25, the switch unit 545 in the frequency band matching adjustment circuit 54 can be turned on, Connect the inductor 541 and the variable capacitor 543 to ground through the switch unit 545 , as shown in step 61 . The capacitance value of the variable capacitor 543 of the frequency band matching adjustment circuit 54 can be adjusted according to the frequency band of the radio frequency signal to be transmitted by the transmission line 25, so that the frequency band matching adjustment circuit 54 is high impedance with respect to the frequency band of the radio frequency signal to be transmitted by the transmission line 25 , can prevent the radio frequency signal transmitted by the transmitting line 25 from being transmitted to the receiving line 27 through the frequency band matching adjustment circuit 54 , and can reduce the loss of the radio frequency signal, as shown in step 62 . Then at least one transmission line 25 transmits the radio frequency signal to the radio frequency signal transceiver end 21 via the connected frequency band matching circuit 23 to perform radio frequency signal transmission, as shown in step 63 .

Before the wireless transceiver device 50 intends to receive the radio frequency signal from the radio frequency signal transceiver terminal 21 through the receiving line 27, the switch unit 545 in the frequency band matching adjustment circuit 54 can be closed, so that the inductance 541 and the variable capacitor 543 are not connected to ground, and the radio frequency signal is transmitted and received. The terminal 21 is connected to the receiving line 27 via the inductor 541 and the variable capacitor 543 , as shown in step 64 . The capacitance value of the variable capacitor 543 of the frequency band matching adjustment circuit 54 can be adjusted according to the frequency band of the radio frequency signal that the radio frequency signal transceiver terminal 21 intends to transmit to the receiving line 27, so that the frequency band matching adjustment circuit 54 is about to be connected to the receiving line 27. The frequency band of the RF signal is low impedance to reduce signal loss during the transmission of the RF signal from the RF signal transceiver end 21 to the receiving line 27 via the frequency band matching adjustment circuit 54 , as shown in step 65 . Then at least one receiving line 27 receives the radio frequency signal from the radio frequency signal transceiver end 21 via the connected frequency band matching adjustment circuit 54 to perform the radio frequency signal receiving action, as shown in step 66 .

In the above embodiments of the present invention, the receiving circuit 27 is mainly connected to the radio frequency signal transceiver end 21 through the frequency band matching adjustment circuit 24 / 54 as an illustrative embodiment. In different embodiments, please refer to FIG. 10 , the frequency band matching adjustment circuit 24/54 of the wireless transceiver device 500 is set between the transmitting line 25 and the radio frequency signal transceiver end 21, and each receiving line 27 passes through different frequency bands respectively. The matching circuit 23 is connected to the radio frequency signal transceiver end 21 . In the process of transmitting or receiving radio frequency signals, the impedance of the frequency band matching adjustment circuit 24/54 can be adjusted, such as switching the switch unit 545 and adjusting the capacitance value of the variable capacitor 543, and can avoid generating loss of signal.

Before the wireless transceiver device 500 intends to transmit radio frequency signals through the transmission line 25 , the switch unit 545 in the frequency band matching adjustment circuit 54 can be turned off, so that the radio frequency signal transceiver end 21 is connected to the transmission line 25 through the inductor 541 and the variable capacitor 543 . According to the frequency band of the radio frequency signal to be transmitted by the transmission line 25, adjust the capacitance value of the variable capacitor 543 of the frequency band matching adjustment circuit 54, so that the frequency band matching adjustment circuit 54 is low impedance relative to the frequency band of the radio frequency signal to be transmitted by the transmission line 25. Then, the radio frequency signal of this frequency band is transmitted to the radio frequency signal transceiver end 21 by one of the transmission lines 25 through the frequency band matching adjustment circuit 54, so that the radio frequency signal can be reduced by the transmission line 25 through the frequency band matching adjustment circuit 54 and transmitted to the radio frequency signal transceiver. Loss occurs in the process of end 21.

Before receiving the RF signal from the RF signal transceiver end 21 through the receiving line 27 , the switch unit 545 in the frequency band matching adjustment circuit 54 can be turned on, so that the inductor 541 and the variable capacitor 543 are connected to ground through the switch unit 545 . According to the frequency band of the radio frequency signal to be received by the receiving line 27, the capacitance value of the variable capacitor 543 of the frequency band matching adjustment circuit 54 is adjusted so that the frequency band matching adjustment circuit 54 is high impedance relative to the frequency band of the radio frequency signal to be received by the receiving line 27. Then the radio frequency signal transceiver 21 can transmit the radio frequency signal to the receiving line 27 through at least one frequency band matching circuit 23, thereby reducing the loss of the radio frequency signal caused by the received radio frequency signal being transmitted to the transmitting line 25 through the frequency band matching adjustment circuit 54.

In the above embodiments of the present invention, the frequency band matching adjustment circuit 54 includes at least one inductor 541 and a variable capacitor 543 connected in series, and the impedance of the frequency band matching adjustment circuit 54 is adjusted by adjusting the capacitance of the variable capacitor 543 . However, in different embodiments, please refer to FIG. 11, the frequency band matching adjustment circuit 74 may also include a variable inductor 741, at least one capacitor 743 and a switch unit 745, and by adjusting the inductance of the variable inductor 741 value to adjust the impedance of the band matching adjustment circuit 74. The operation of the switch unit 745 is similar to the operation of the switch unit 545 shown in FIG. 7 , and will not be repeated here.

Please refer to FIG. 12 , which is a schematic structural diagram of another embodiment of a wireless transceiver device with a frequency band matching adjustment function according to the present invention. As shown in the figure, the wireless transceiver device 80 according to the embodiment of the present invention includes a radio frequency signal transceiver terminal 21, a first frequency band matching adjustment circuit 83, a second frequency band matching adjustment circuit 84, a plurality of transmission lines 25 and a plurality of The receiving line 27, wherein the transmitting line 25 is connected to the radio frequency signal transceiver end 21 through the first frequency band matching adjustment circuit 83, and the receiving line 27 is connected to the radio frequency signal receiving end 21 through the second frequency band matching adjustment circuit 84, and the first frequency band matching adjustment circuit 83 and the second frequency band matching adjustment circuit 84 adjust the impedance according to the frequency band of the radio frequency signal to be received or transmitted, and then receive or transmit the radio frequency signal of the frequency band.

The first frequency band matching adjustment circuit 83 includes at least a first inductor 831, a first variable capacitor 833, and a first switch unit 835, wherein the first variable capacitor 833 is connected in series with the first inductor 831, and one end of the first switch unit 835 The first variable capacitor 833 and/or the first inductor 831 are connected, and the other end of the first switch unit 835 is connected to ground. The second frequency band matching adjustment circuit 84 includes at least a second inductor 841, a second variable capacitor 843, and a second switch unit 845, wherein the second variable capacitor 843 is connected in series with the second inductor 841, and the second switch unit 845 One end is connected to the second variable capacitor 843 and/or the second inductor 841 , and the other end of the second switch unit 845 is connected to the ground.

Before the wireless transceiver 80 transmits the radio frequency signal, the first switch unit 835 can be turned off, so that the transmission line 25 is connected to the radio frequency signal transceiver end 21 through the first inductor 831 and the first variable capacitor 833, and the second switch unit 845 can also be turned on. , so that the RF signal transceiving end 21 is connected to the ground through the second inductor 841 , the second variable capacitor 843 and the second switch unit 845 .

According to the frequency band of the radio frequency signal that the transmission line 25 intends to transmit, adjust the capacitance value of the first variable capacitor 833, so that the first frequency band matching adjustment circuit 83 is low impedance relative to the frequency band of the radio frequency signal that the transmission line 25 intends to transmit, to reduce Loss occurs in the process of the radio frequency signal passing through the first frequency band matching adjustment circuit 83 .

According to the frequency band of the radio frequency signal to be transmitted, the capacitance of the second variable capacitor 843 is adjusted so that the second frequency band matching adjustment circuit 84 has a high impedance relative to the frequency band of the radio frequency signal to be transmitted by the transmission line 25 . When one of the transmitting lines 25 transmits the radio frequency signal to the radio frequency signal transceiver end 21 via the connected first frequency band matching adjustment circuit 83, the transmitted radio frequency signal will not be transmitted to the receiving line 27 through the second frequency band matching adjustment circuit 84 , which can reduce the signal loss generated in the process of transmitting radio frequency signals.

Before receiving the radio frequency signal, the wireless transceiver 80 can turn on the first switch unit 835, so that the radio frequency signal transceiver end 21 is connected to the ground through the first inductor 831, the first variable capacitor 833 and the first switch unit 835, and can turn off the second switch unit 835. The switch unit 845 connects the receiving line 27 to the radio frequency signal transceiver end 21 through the second inductor 841 and the second variable capacitor 843 .

According to the frequency band of the radio frequency signal that the receiving line 27 wants to receive, adjust the capacitance value of the first variable capacitor 833, so that the first frequency band matching adjustment circuit 83 is high impedance relative to the frequency band of the radio frequency signal that the receiving line 27 wants to receive, to reduce The received radio frequency signal enters the transmission line 25 from the first frequency band matching adjustment circuit 83, thereby causing loss of the received radio frequency signal.

Adjust the capacitance value of the second variable capacitor 843 according to the frequency band of the radio frequency signal that the receiving line 27 wants to receive, so that the second frequency band matching adjustment circuit 84 is low impedance relative to the frequency band of the radio frequency signal that the receiving line 27 wants to receive, to reduce Signal loss generated when the received radio frequency signal passes through the second frequency band matching adjustment circuit 84 .

The frequency band matching adjustment circuit 24/54/74/83/84 described in the present invention can also become a band-stop filter (notch filter) with adjustment function, and can be used to filter out one time, two times, three times or any multiple Specific frequency bands, which will further reduce the loss of received or transmitted radio frequency signals.

The connection mentioned in the present invention refers to a direct connection or an indirect connection between one or more objects or components, for example, there may be one or more intermediate connections between one or more objects or components.

Words such as may, must and changes described in the system of the specification are not limitations of the present invention. The technical terms used in the specification are mainly used to describe specific embodiments, and are not intended to limit the present invention. A single quantity value (such as one and the one) used in the specification can also be multiple, unless it is clearly stated in the content of the specification. For example, a device mentioned in the specification may include a combination of two or more devices, while a substance mentioned in the specification may include a mixture of multiple substances.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, all equivalent changes and modifications made according to the shape, structure, characteristics and spirit of the claims of the present invention, All should be included in the scope of the claims 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.