Multi-frequency signal output device

Abstract

The invention discloses a multi-frequency signal output device. The device comprises a different frequency band matching network; each frequency band matching network comprises a switch unit and a matching network; each matching network is a low-pass matching network or a high-pass matching network; the matching network comprises a matching network first part and a matching network second part; the matching network first part is connected with the matching network second part through the switch unit; the first part of each matching network is multiplexed to one point; or the second part of each matching network is multiplexed to one point; and the switch units are used for being closed in the matching frequency bands of the respective matching networks and being disconnected in the matching frequency bands of the other matching networks. According to the scheme, the output of the ultra-wideband signal under the condition that each matching network is a low-pass network or a high-pass network is realized.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of amplifiers, and in particular to a multi-frequency signal output device. Background Art

[0002] A multi-frequency signal output device (such as a multi-frequency amplifier) ​​is a device that can output signals within multiple frequency ranges. Compared with traditional single-frequency signal output devices, multi-frequency signal output devices have higher flexibility and adaptability, and can work at different frequencies to meet a variety of communication and application requirements. Multi-frequency amplifiers are widely used in various modern communication systems, such as CDMA, GSM, LTE, UWB and other technologies, and are also an important part of wireless LAN applications such as WiFi, Bluetooth, Zigbee, etc.

[0003] At present, in the multi-frequency signal output device of the RF front end of the communication terminal, generally, ultra-wideband is achieved through the impedance matching conditions of each matching network; for example, a frequency RF signal is low-pass in the first matching network, but high-impedance in the second matching network, and cannot pass; another frequency RF signal is high-impedance in the first matching network, and cannot pass, but is low-pass in the second matching network; that is, the first matching network and the second matching network are a combination of low-pass and high-pass; similarly, in some other combinations, such as low-pass + bandpass; high-pass + bandpass; bandpass + bandpass, the signals of each frequency band do not pass each other; but considering that if each matching network is a low-pass matching network, or a high-pass matching network; this will cause the signals of each frequency band to pass each other, so that it is impossible to output a valid signal at a specific frequency, and it is impossible to achieve the output of valid signals at each frequency, thereby limiting the signal coverage of each frequency band of the signal output device, and unable to achieve ultra-wideband signal output. Summary of the invention

[0004] The present invention provides a multi-frequency signal output device to achieve the output of ultra-wideband signals when each matching network is a low-pass network or a high-pass network.

[0005] To achieve the above objectives, an embodiment of the present invention provides a multi-frequency signal output device, the multi-frequency signal output device comprising: matching networks of different frequency bands; each of the frequency band matching networks comprises a switch unit and a matching network; each of the matching networks is a low-pass matching network or a high-pass matching network;

[0006] The matching network includes a first matching network part and a second matching network part; the first matching network part is connected to the second matching network part through the switch unit; each of the first matching network parts is multiplexed at one point; or each of the second matching network parts is multiplexed at one point;

[0007] The switch unit is used to close within the matching frequency band of each matching network and to open within the matching frequency bands of other matching networks.

[0008] Optionally, the multi-frequency signal output device further comprises: a plurality of parallel switches; the parallel switches correspond to the switch units one by one; the input end of the switch unit is electrically connected to the first end of the parallel switch; the second end of the parallel switch is grounded;

[0009] The parallel switch is used to be disconnected in the matching frequency band corresponding to the matching network and to be turned on in the matching frequency bands of other matching networks.

[0010] Optionally, when the first parts of the matching networks are multiplexed at one point, the multi-frequency signal output device further comprises: a selection switch for each signal channel;

[0011] The number of the signal channel selection switches corresponds to the number of the switch units; the first end of the signal channel selection switch is connected to the second part of each matching network; and the second ends of the signal channel selection switches serve as multi-channel output ends.

[0012] Optionally, the switch unit is replaced by a wire; the first part of the matching network is connected to the first end of the signal channel selection switch; each second end of the signal channel selection switch is connected to each second part of the matching network and serves as a multi-way output end.

[0013] Optionally, the multi-frequency signal output device further includes: a first amplifier; an input end of the first amplifier, used to receive radio frequency signals of each frequency; and an output end of the first amplifier is electrically connected to the first part of each matching network.

[0014] Optionally, the multi-frequency signal output device further includes: a common matching network; the first amplifier is connected to the first part of each matching network through the common matching network.

[0015] Optionally, when the second parts of each matching network are multiplexed at one point, the multi-frequency signal output device further includes: a second amplifier;

[0016] The second part of each matching network is electrically connected to the input end of the second amplifier; the output end of the second amplifier outputs radio frequency signals of different frequency bands.

[0017] Optionally, when the second parts of the matching networks are multiplexed at one point, the multi-frequency signal output device further comprises: a multi-stage third amplifier and a fourth amplifier;

[0018] The input end of each of the third amplifiers is used to receive radio frequency signals of different frequencies; the output end of each of the third amplifiers is electrically connected to the first part of each of the matching networks; the second part of each of the matching networks is electrically connected to the input end of the fourth amplifier; the output end of the fourth amplifier is used to output radio frequency signals of different frequency bands.

[0019] Optionally, when the first parts of the matching networks are reconnected at one point, the first parts of the matching networks include a first inductor; the second parts of the matching networks include a first capacitor;

[0020] When the second parts of the matching networks are connected to one point, the first part of the matching network includes a first capacitor; the second part of the matching network includes a first inductor.

[0021] Optionally, the device further comprises: a series inductor and a decoupling capacitor;

[0022] The first end of the series inductor is connected to the first part of each matching network; or the first end of the series inductor is connected to the second part of each matching network;

[0023] The second end of the series inductor is electrically connected to the first end of the decoupling capacitor and the AC power supply; the second end of the decoupling capacitor is grounded.

[0024] In an embodiment of the present invention, when each matching network is a low-pass matching network or a high-pass matching network, the switch unit is controlled to be closed in the matching frequency band of each matching network and disconnected in the matching frequency band of other matching networks. In this way, the RF input signal of each frequency band can output the RF signal of each frequency band correspondingly through the first part of each matching network, the switch unit, and the second part of each matching network, thereby realizing the output of ultra-wideband signals when each matching network is a low-pass matching network or a high-pass matching network. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a multi-frequency signal output device provided by an embodiment of the present invention;

[0026] Figure 2 is a structural schematic diagram of another multi-frequency signal output device provided by an embodiment of the present invention;

[0027] Figure 3 is a structural schematic diagram of another multi-frequency signal output device provided by an embodiment of the present invention;

[0028] Figure 4 is a structural schematic diagram of another multi-frequency signal output device provided by an embodiment of the present invention;

[0029] Figure 5 is a structural schematic diagram of another multi-frequency signal output device provided by an embodiment of the present invention;

[0030] Figure 6 is a structural schematic diagram of another multi-frequency signal output device provided by an embodiment of the present invention;

[0031] Figure 7 is a structural schematic diagram of another multi-frequency signal output device provided by an embodiment of the present invention;

[0032] Figure 8 is a structural schematic diagram of another multi-frequency signal output device provided by an embodiment of the present invention;

[0033] Fig. 9 is a specific circuit diagram of a multi-frequency signal output device provided by an embodiment of the present invention;

[0034] Fig.10 This is a specific circuit diagram of another multi-frequency signal output device provided by an embodiment of the present invention.

[0035] Fig.11 is a specific circuit diagram of another multi-frequency signal output device provided by an embodiment of the present invention;

[0036] Fig.12 is a specific circuit diagram of another multi-frequency signal output device provided by an embodiment of the present invention;

[0037] Fig.13 is a structural schematic diagram of another multi-frequency signal output device provided by an embodiment of the present invention;

[0038] Fig.14 It is a structural schematic diagram of another multi-frequency signal output device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] Figure 1 is a structural diagram of a multi-frequency signal output device provided by an embodiment of the present invention, Figure 2 is a schematic diagram of the structure of another multi-frequency signal output device provided by an embodiment of the present invention; Figure 1-2As shown, the multi-frequency signal output device includes: matching networks 10 of different frequency bands; each matching network of the frequency band includes a switch unit 11 and a matching network 12; each matching network 12 is a low-pass matching network or a high-pass matching network; the matching network 12 includes a first matching network part 121 and a second matching network part 122; the first matching network part 121 is connected to the second matching network part 122 through the switch unit 11; each first matching network part 121 is multiplexed at a point (such as Figure 1 ); or, each matching network second part 122 is multiplexed at one point (such as Figure 2 ); a switch unit 11, used to close within the matching frequency band of each matching network and to open within the matching frequency band of other matching networks.

[0041] Among them, in this embodiment, the multi-frequency signal output device is suitable for each matching network 12 to be a low-pass matching network, or a high-pass matching network; a low-pass matching network is a network that can pass signals below the cut-off frequency; when the cut-off frequency signal passes, the impedance of the matching network is a passband matching impedance; a high-pass matching network is a network that can pass signals above the cut-off frequency, and when the cut-off frequency signal passes, the impedance of the matching network is a passband matching impedance; exemplarily, a matching network is a low-pass matching network with a frequency of 800MHz; that is, signals within the frequency range of (0-800MHz) can pass; at a frequency of 800MHz, the impedance of the matching network is a passband matching impedance; that is, when a signal corresponding to a frequency of 800MHz is input, the insertion loss of the signal corresponding to a frequency of 800MHz output through the matching network is small; exemplarily, a matching network is a low-pass matching network with a frequency of 30 00MHz low-pass matching network; that is, signals within the frequency range of (0-3000MHz) can pass through; at a frequency of 300MHz, the impedance of the matching network is a passband matching impedance, that is, when a signal corresponding to a frequency of 3000MHz is input, the insertion loss of the signal corresponding to a frequency of 3000MHz output through the matching network is small; if the input ends of the two matching networks are multiplexed at one point, at this time, since both matching networks are low-pass matching networks, when the signal corresponding to a frequency of 800MHz passes through the multiplexed point, it will pass through the 800MHz low-pass matching network and the 3000MHz low-pass matching network at the same time, which will cause the energy of the signal corresponding to the frequency of 800MHz to be shunted, resulting in the attenuation of the output signal corresponding to the frequency of 800MHz, thus limiting the output of the signals corresponding to each frequency; or if the output ends of the two matching networks are multiplexed at one point, The signals corresponding to the 800MHz and 3000MHz frequencies are respectively connected to one point after passing through the matching networks. At this time, since both matching networks are low-pass matching networks, the 800MHz frequency will also pass through the multiplexing point to enter the matching network corresponding to the 3000MHz frequency. Finally, the energy of the signal corresponding to the 800MHz frequency is split, resulting in the attenuation of the output signal corresponding to the 800MHz frequency.

[0042] In view of the specific technical problems caused when the above-mentioned matching networks 12 are all low-pass matching networks or high-pass matching networks, in this solution, the first part 121 of the matching network is connected to the second part 122 of the matching network through the switch unit 11, so that the switch unit 11 is closed in the matching frequency band of each matching network 12 and is disconnected in the matching frequency band of other matching networks 12; it can be understood that the first part 121 of the matching network and the second part 122 of the matching network are two parts constituting the matching network, and the overall matching network constituted can play the role of impedance matching; the first part 121 of the matching network alone, or the second part 122 of the matching network alone cannot play the role of impedance matching; the following also takes two matching networks as a low-pass matching network with a frequency of 800MHz; a low-pass matching network with a frequency of 3000MHz as an example for explanation;

[0043] When the input signal is an RF input signal of 800MHz, the corresponding switch unit 11 is turned on, and the switch unit 11 corresponding to the low-pass matching network with a frequency of 3000MHz is turned off, then the RF input signal of 800MHz passes through the first part 121 of the corresponding matching network, the switch unit 11, and the second part 122 of the corresponding matching network to output an RF signal of 800MHz; when the frequency band RF input signal is an RF input signal of 3000MHz, the corresponding switch unit 11 is turned on, and the switch unit 11 corresponding to the low-pass matching network with a frequency of 800MHz is turned off, then the RF input signal of 3000MHz passes through the first part 121 of the corresponding matching network, the switch unit 11, and the second part 122 of the corresponding matching network to output an RF signal of 3000MHz. Similarly, a first part 121 of a multi-band matching network, each switch unit 11, and a second part 122 of a multi-band matching network are provided; this avoids the problem in the prior art that no switch unit is provided, and the input end or output end of each matching network is directly connected to one point, thereby limiting the output of the signal corresponding to each frequency. This solution realizes the output of ultra-wideband signals when each matching network is a low-pass matching network or a high-pass matching network.

[0044] Optionally, based on the above embodiment, the device is further optimized. Figure 3 is a schematic structural diagram of another multi-frequency signal output device provided by an embodiment of the present invention, Figure 4 is a schematic diagram of the structure of another multi-frequency signal output device provided by an embodiment of the present invention. Figure 3-4 As shown, the multi-frequency signal output device also includes: a plurality of parallel switches 40; the parallel switches 40 correspond to the switch units 11 one by one; the input end of the switch unit 11 is electrically connected to the first end of the parallel switch 40; the second end of the parallel switch 40 is connected to the AC ground; the parallel switch 40 is used to disconnect in the matching frequency band of the corresponding matching network 12 and to conduct in the matching frequency bands of other matching networks 12.

[0045] The switch unit 11 is closed in the matching frequency band of each matching network 12, and the switch unit 11 is disconnected in the matching frequency band of other matching networks 12, so that the impedance of the matching network is a passband matching impedance in the matching frequency band of any matching network, and the impedance is a high impedance state in other matching networks; in some embodiments, the parallel switch 40 is disconnected in the matching frequency band of each matching network 12; the parallel switch 40 is turned on in the matching frequency band of other matching networks 12; so that the impedance of the matching network is a passband matching impedance in the matching frequency band of any matching network, and the impedance is a high impedance state in other matching networks; Here, two matching networks are used as examples to illustrate that the two matching networks are low-pass matching networks with a frequency of 800MHz and low-pass matching networks with a frequency of 3000MHz; when the frequency band RF input signal is an RF input signal of 800MHz, the corresponding switch unit 11 is turned on and the parallel switch 40 is turned off; and the switch unit 11 corresponding to the low-pass matching network with a frequency of 3000MHz is turned off and the parallel switch 40 is closed, then the RF input signal of 800MHz passes through the first part 121 of the corresponding matching network, the switch unit 11, and the second part 122 of the corresponding matching network, and then outputs an RF signal of 800MHz. Similarly, a multi-band matching network is set, so that the output of ultra-wideband signals when each matching network is a low-pass matching network or a high-pass matching network is also achieved.

[0046] Optionally, based on the above embodiment, Figure 3 The first part of each matching network is reconnected to a point corresponding to the embodiment for optimization, Figure 5 is a schematic diagram of the structure of another multi-frequency signal output device provided by an embodiment of the present invention. Figure 5 As shown, when the first parts of each matching network are multiplexed at one point, the multi-frequency signal output device also includes: each signal channel selection switch 50; the number of the signal channel selection switches 50 corresponds to the number of the switch units 11; the first end of the signal channel selection switch 50 is connected to the second part 122 of each matching network; and the second ends of the signal channel selection switches 50 serve as multi-channel output ends.

[0047] Among them, on the basis of realizing ultra-wideband RF signals, each signal channel selection switch 50 is set to realize multi-channel output of RF signals in each frequency band to meet the application requirements of different scenarios, such as the signal requirements of different filters; the signal frequencies of different filters are within the surrounding range of the matching frequency of the matching network corresponding to the corresponding signal channel selection switch 50; if the matching frequency of the matching network is 800MHz, the multi-channel output end of the signal channel selection switch 50 can be 750-800MHz; it can also be 800-820MHz; it can be understood that in order to meet the RF signal requirements of any filter, when the switch unit 11 is closed, the corresponding signal channel selection switch can be switched to any output end.

[0048] Optional, in Figure 5 Based on the embodiment, further optimization is performed. Figure 6 is a schematic diagram of the structure of another multi-frequency signal output device provided by an embodiment of the present invention. Figure 6 As shown, the switch unit 11 is replaced by a wire; the first part 121 of the matching network is connected to the first end of the signal channel selection switch 50; each second end of the signal channel selection switch 50 is connected to each second part 122 of the matching network and serves as a multi-way output end.

[0049] Among them, in order to achieve multi-channel output of ultra-wideband RF signals and RF signals of various frequency bands, in other embodiments, the switch unit 11 can be replaced by a wire; the first part 121 of the matching network is connected to the first end of the signal channel selection switch 50; each second end of the signal channel selection switch 50 is connected to each second part 122 of the matching network, and serves as a multi-channel output end. In this way, in order to meet the RF signal requirements of any filter, it is necessary to control any output end of the corresponding signal channel selection switch to be closed, and the other output ends of the signal channel selection switch to be disconnected; at the same time, the other signal channel selection switches are all disconnected; in this way, the RF amplification signal requirements of any filter can be met; since the switch unit 11 is replaced by a wire in this embodiment, the line loss is also reduced.

[0050] Optionally, further optimization is performed based on the above embodiments in which the first part of the matching network is multiplexed at one point. Figure 7 is a schematic diagram of the structure of another multi-frequency signal output device provided by an embodiment of the present invention. Figure 7 As shown, the multi-frequency signal output device also includes: a first amplifier 60; an input end of the first amplifier 60, for receiving radio frequency signals of each frequency; and an output end of the first amplifier 60 is electrically connected to each matching network first part 121. In the actual scenario, the radio frequency input signals of different frequency bands are processed by the first amplifier 60 and then output as radio frequency amplified signals of each frequency band, and the radio frequency amplified signals of each frequency band are output after passing through the corresponding matching network first part 121, the switch unit 11, and the corresponding matching network second part 122. In this way, in combination with the specific scenario, the output of ultra-wideband amplified signals is achieved when each matching network is a low-pass matching network or a high-pass matching network.

[0051] Optional, in Figure 7 Further optimization based on the embodiment, Figure 8 is a schematic diagram of the structure of another multi-frequency signal output device provided by an embodiment of the present invention; Figure 8As shown, the multi-frequency signal output device also includes: a common matching network 70; the first amplifier 60 is connected to the first part of each matching network 121 through the common matching network 70. The bandwidth of the common matching network 60 can cover all frequency bands, so that the common matching network 70 and each matching network 12 can also achieve ultra-wide bandwidth RF amplified signal output.

[0052] The matching impedance of each matching network is described below with a specific circuit structure diagram; Fig. 9 is a specific circuit diagram of a multi-frequency signal output device provided by an embodiment of the present invention; Fig. 9 As shown, when the first parts of the matching networks are reconnected at one point, the first part 121 of the matching network includes a first inductor L1; the second part 122 of the matching network includes a first capacitor C1; Fig.10 is a specific circuit diagram of another multi-frequency signal output device provided by an embodiment of the present invention; Fig.10 As shown, when the second part of each matching network is reconnected to one point, or, the first part 121 of the matching network includes the first capacitor C1; the second part 122 of the matching network includes the first inductor L1. Among them, the LC structure composed of the first inductor L1 and the first capacitor C1 is a low-pass matching network; when the first inductor L1 and the first capacitor C1 in each matching network 12 are set to different parameters, the low-pass matching network is a matching network of different frequency bands; for example, when the first inductor L1 is 2.1nH; the first capacitor C1 is 14pF, a low-pass matching network of 800MHz is formed; when the first inductor is 0.38nH; the first capacitor C1 is 2.5pF; a low-pass matching network of 3000MHz is formed.

[0053] Optional, in Fig. 9 Based on the embodiment, the specific circuit diagram is optimized. Fig.11 is a specific circuit diagram of another multi-frequency signal output device provided by an embodiment of the present invention; Fig.11 As shown, the multi-frequency signal output device also includes: a series inductor L2 and a decoupling capacitor C2; the first end of the series inductor L2 is connected to the first part 121 of each matching network; the second end of the series inductor L2 is electrically connected to the first end of the decoupling capacitor C2 and the AC power supply; the second end of the decoupling capacitor C2 is grounded.

[0054] Similarly, in Fig.10 Based on the embodiment, the specific circuit diagram is optimized. Fig.12 is a specific circuit diagram of another multi-frequency signal output device provided by an embodiment of the present invention; Fig.12As shown, the multi-frequency signal output device also includes: a series inductor L2 and a decoupling capacitor C2; the first end of the series inductor L2 is connected to the second part 122 of each matching network; the second end of the series inductor L2 is electrically connected to the first end of the decoupling capacitor C2 and the AC power supply; the second end of the decoupling capacitor C2 is grounded.

[0055] It should be noted that, based on the above embodiment, when the frequency band RF signal is an RF input signal of 800MHz, the corresponding switch unit 11 is turned on and the parallel switch 40 is disconnected; and the switch unit 11 corresponding to the low-pass matching network with a frequency of 3000MHz is disconnected, and the parallel switch 40 is closed. At this time, the parallel switch 40 is closed, resulting in the series inductor L2, the decoupling capacitor C2 and the first inductor L1 forming an impedance matching network. The impedance matching network can better enable the 800MHz low-pass matching network to achieve better impedance matching, thereby further enabling the 800MHz RF input signal to be output.

[0056] Optionally, in some other embodiments, when the second parts of the matching networks are multiplexed at one point, the multi-frequency signal output device further includes: a second amplifier 80; Fig.13 is a schematic diagram of the structure of another multi-frequency signal output device provided by an embodiment of the present invention. Fig.13 As shown, each second part 122 of the matching network is electrically connected to the input end of the second amplifier 80; the output end of the second amplifier 80 outputs radio frequency amplified signals of different frequency bands.

[0057] Among them, the matching network is a low-pass matching network with a frequency of 800MHz; a low-pass matching network with a frequency of 3000MHz is used as an example for explanation; in a specific scenario, when the frequency band RF input signal is an RF input signal of 800MHz, the switch unit 11 in the corresponding 800MHz low-pass matching network is turned on; and the switch unit 11 in the corresponding 3000MHz low-pass matching network is turned off; the 800MHz RF input signal passes through the 800MHz low-pass matching network, and then is amplified by the second amplifier 80 to output an 800MHz RF input amplified signal, so that the 800MHz RF input amplified signal is output; when the frequency band RF input signal is an RF input signal of 3000MHz, at this time due to the The switch unit 11 in the corresponding 3000MHz low-pass matching network is turned on; and the switch unit in the corresponding 800MHz low-pass matching network is turned off; the 3000MHz RF input signal passes through the 3000MHz low-pass matching network, and then is amplified by the second amplifier 80 to output the 3000MHz RF input amplified signal, so that the 3000MHz RF input amplified signal is output; and so on, multiple matching networks are set, and the RF input signals IN1, IN2, IN3... of each frequency band pass through the multiple matching networks and the second amplifier respectively, and then output the RF amplified signals OUT1, OUT2, OUT3... of each frequency band, so that the output of the ultra-wideband amplified signal under each matching network is achieved when the matching network is a low-pass matching network or a high-pass matching network.

[0058] Optionally, in some other embodiments, when the second parts of the matching networks are multiplexed at one point, the multi-frequency signal output device further includes: a multi-stage third amplifier 90 and a fourth amplifier 100; Fig.14 is a schematic diagram of the structure of another multi-frequency signal output device provided by an embodiment of the present invention. Fig.14 As shown, the input end of each third amplifier 90 is used to receive RF signals of different frequencies; the output end of each third amplifier 90 is electrically connected to the first part 121 of each matching network; the second part 122 of each matching network is electrically connected to the input end of the fourth amplifier 100; the output end of the fourth amplifier 100 is used to output RF amplified signals of different frequency bands.

[0059] Among them, the matching network is a low-pass matching network with a frequency of 800MHz; the low-pass matching network with a frequency of 3000MHz is taken as an example for explanation; in another scenario, when the frequency band RF input signal is an RF input signal of 800MHz, the switch unit 11 in the corresponding 800MHz low-pass matching network is turned on; and the switch unit 11 in the corresponding 3000MHz low-pass matching network is turned off; the 800MHz RF input signal passes through the third amplifier 90 to output an 800MHz RF amplified input signal, and then passes through the 800MHz low-pass matching network, and then passes through the fourth amplifier 100 for amplification again to output an 800MHz RF input amplified signal, so that the 800MHz RF input amplified signal output ; When the frequency band RF input signal is a 3000MHz RF input signal, at this time, the switch unit in the corresponding 3000MHz low-pass matching network is turned on, and the switch unit in the corresponding 800MHz low-pass matching network is turned off; the 3000MHz RF input signal outputs an 800MHz RF amplified input signal after passing through the third amplifier 90, and then passes through the 3000MHz low-pass matching network, and then is amplified again by the fourth amplifier 100 to output a 3000MHz RF input amplified signal, so that the 3000MHz RF input amplified signal is output; and so on, multiple matching networks are set, so that the output of ultra-wideband amplified signals is achieved when each matching network is a low-pass matching network or a high-pass matching network.

[0060] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A multi-frequency signal output device, characterized in that: include: Different frequency band matching networks; each of the frequency band matching networks comprises a switch unit and a matching network; each of the matching networks is a low-pass matching network or a high-pass matching network; The matching network includes a first matching network part and a second matching network part; the first matching network part is connected to the second matching network part through the switch unit; each of the first matching network parts is multiplexed at one point; or each of the second matching network parts is multiplexed at one point; The switch unit is used to close within the matching frequency band of each matching network and to open within the matching frequency bands of other matching networks.

2. The multi-frequency signal output device according to claim 1, characterized in that: Also includes: A plurality of parallel switches; the parallel switches correspond to the switch units one by one; the input end of the switch unit is electrically connected to the first end of the parallel switch; the second end of the parallel switch is grounded; The parallel switch is used to be disconnected in the matching frequency band corresponding to the matching network and to be turned on in the matching frequency bands of other matching networks.

3. The multi-frequency signal output device according to claim 1, characterized in that: When the first parts of the matching networks are multiplexed at one point, the multi-frequency signal output device further comprises: a selection switch for each signal channel; The number of the signal channel selection switches corresponds to the number of the switch units; the first end of the signal channel selection switch is connected to the second part of each matching network; and the second ends of the signal channel selection switches serve as multi-channel output ends.

4. The multi-frequency signal output device according to claim 3, characterized in that: The switch unit is replaced by a wire; the first part of the matching network is connected to the first end of the signal channel selection switch; each second end of the signal channel selection switch is connected to each second part of the matching network and serves as a multi-way output end.

5. The multi-frequency signal output device according to any one of claims 3 to 4, characterized in that: Also includes: A first amplifier; an input end of the first amplifier is used to receive radio frequency signals of various frequencies; an output end of the first amplifier is electrically connected to the first part of each matching network.

6. The multi-frequency signal output device according to claim 5, characterized in that: Also includes: Public matching network; The first amplifier is connected to each of the first parts of the matching networks through the common matching network.

7. The multi-frequency signal output device according to claim 1, characterized in that: When the second parts of each matching network are multiplexed at one point, the multi-frequency signal output device further includes: a second amplifier; The second part of each matching network is electrically connected to the input end of the second amplifier; the output end of the second amplifier outputs radio frequency signals of different frequency bands.

8. The multi-frequency signal output device according to claim 1, characterized in that: When the second parts of the matching networks are multiplexed at one point, the multi-frequency signal output device further comprises: a multi-stage third amplifier and a fourth amplifier; The input end of each of the third amplifiers is used to receive radio frequency signals of different frequencies; the output end of each of the third amplifiers is electrically connected to the first part of each of the matching networks; the second part of each of the matching networks is electrically connected to the input end of the fourth amplifier; the output end of the fourth amplifier is used to output radio frequency signals of different frequency bands.

9. The multi-frequency signal output device according to claim 1, characterized in that: When the first parts of the matching networks are connected to one point, the first parts of the matching networks include a first inductor; the second parts of the matching networks include a first capacitor; When the second parts of the matching networks are connected to one point, the first part of the matching network includes a first capacitor; the second part of the matching network includes a first inductor.

10. The multi-frequency signal output device according to claim 9, characterized in that: Also includes: Series inductor and decoupling capacitor; The first end of the series inductor is connected to the first part of each matching network; or the first end of the series inductor is connected to the second part of each matching network; The second end of the series inductor is electrically connected to the first end of the decoupling capacitor and the AC power supply; the second end of the decoupling capacitor is grounded.

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