CN119543848A - Multi-frequency amplifying device - Google Patents
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Abstract
The invention discloses a multi-frequency amplifying device. The device comprises a plurality of matching networks, a front-stage driving amplifying module and an output-stage amplifying module of different frequency bands, wherein the matching networks, the front-stage driving amplifying module and the output-stage amplifying module form multi-frequency band radio frequency signal channels, radio frequency input signals of all the frequency bands correspondingly output radio frequency amplified signals of all the frequency bands through the multi-frequency band radio frequency signal channels, the matching networks of all the frequency bands achieve required matching impedance in respective working frequency bands, and the matching networks of all the frequency bands are out-of-band rejection characteristics in other working frequency bands. According to the scheme, the matching networks with a plurality of different frequency bands are arranged, so that the ultra-large bandwidth output of multiple frequency bands is realized, and the physical limitation of bandwidth bottleneck in the prior art is broken through.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a multi-frequency amplifying device.
Background
The multi-frequency amplifying device is a device capable of amplifying in a plurality of frequency ranges. Compared with the traditional single-frequency amplifier, the multi-frequency amplifying device has higher flexibility and adaptability, can work at different frequencies, and meets various communication and application requirements. The multi-frequency amplifier is widely applied to various modern communication systems, such as CDMA, GSM, LTE, UWB and other technologies, and is also an important part of wireless local area network applications such as WiFi, bluetooth, zigbee and the like. In addition, the multi-frequency amplifying device is also used for miniaturized power amplifier design, and has special practical value .
In the radio frequency front-end system of the communication terminal, the upper bandwidth limit of a matching network is 25-30%, all required frequency bands can not be covered by an Ultra-wideband amplifier, the upper bandwidth limit of the matching network is limited by physics, only adjacent frequency bands can be grouped, for example, the upper bandwidth limit is referred to as Low-band from 660MHz to 915MHz, the lower bandwidth limit is referred to as Mid-band from 1710MHz to 2025MHz, the upper bandwidth limit is referred to as High-band from 2300MHz to 2690MHz, the lower bandwidth limit is referred to as Ultra-High-band from 3300MHz, and then a signal amplifying function is realized by using relatively wideband amplifiers in each frequency band group.
Disclosure of Invention
The invention provides a multi-frequency amplifying device, which realizes multi-frequency ultra-large bandwidth output by arranging a plurality of matching networks with different frequency bands, and breaks through the physical limitation of bandwidth bottleneck in the prior art.
In order to achieve the above purpose, the embodiment of the invention provides a multi-frequency amplifying device, which comprises a plurality of matching networks with different frequency bands, a front-stage driving amplifying module and an output-stage amplifying module;
each frequency band radio frequency input signal respectively outputs each frequency band radio frequency output signal through each multi-frequency band radio frequency signal channel;
The matching network of each frequency band realizes the required matching impedance in each working frequency band, and the matching network has out-of-band inhibition characteristics in other working frequency bands.
Optionally, the pre-stage driving amplification module comprises a pre-stage driving amplifier, the output stage amplification module comprises an output stage amplifier, and the matching network comprises an output matching network;
The input ends of the output matching networks are connected to a multiplexing point, the input ends of the front-stage driving amplifiers receive radio frequency input signals, the output ends of the front-stage driving amplifiers are electrically connected with the input ends of the output-stage amplifiers, the output ends of the output-stage amplifiers are connected with the multiplexing point, and the output ends of the output matching networks output radio frequency output signals of various frequency bands.
Optionally, the pre-stage driving amplification module comprises a pre-stage driving amplifier, the output stage amplification module comprises an output stage amplifier, and the matching network comprises an input matching network;
The input ends of the input matching networks are used for receiving radio frequency input signals of various frequency bands, the output ends of the input matching networks are connected to a multiplexing point, the multiplexing point is connected with the input end of the pre-stage driving amplifier, the output end of the pre-stage driving amplifier is electrically connected with the input end of the output stage amplifier, and the output end of the output stage amplifier outputs radio frequency output signals of various frequency bands.
Optionally, the pre-stage driving amplification module comprises a multi-stage pre-stage driving amplifier, the output stage amplification module comprises an output stage amplifier, and the matching network comprises an inter-stage matching network;
The input end of each front-stage driving amplifier receives radio frequency input signals of each frequency range, the output end of each front-stage driving amplifier is correspondingly and electrically connected with the input end of each inter-stage matching network, the output end of each inter-stage matching network is connected with a multiplexing point, the multiplexing point is connected with the input end of the output-stage amplifier, and the output end of the output-stage amplifier outputs radio frequency output signals of each frequency range.
Optionally, the device further comprises a public matching network;
the public matching network is connected between the output end of the output stage amplifier and the multiple connection point.
Optionally, the device further comprises a plurality of first subsequent matching networks with different frequency bands;
each first subsequent matching network is correspondingly connected with each output matching network.
Optionally, the output matching network includes a first frequency band output matching network and a second frequency band output matching network;
The first frequency band output matching network comprises a first inductor and a first capacitor, and the second frequency band output matching network comprises a second inductor and a second capacitor;
The first end of the first inductor is connected with the multiple connection point, the second end of the first inductor is electrically connected with the first end of the first capacitor, the second end of the first capacitor is grounded, and the first end of the first capacitor is used as an output end of the first frequency band output matching network;
The first end of the second capacitor is connected with the multiple connection point, the second end of the second capacitor is electrically connected with the first end of the second inductor, the second end of the second inductor is grounded, and the second end of the second inductor is used as an output end of the second frequency band output matching network.
Optionally, the input matching network includes a first frequency band input matching network and a second frequency band input matching network;
the first frequency band input matching network comprises a third inductor and a third capacitor, and the second frequency band input matching network comprises a fourth inductor and a fourth capacitor;
The first end of the third inductor is used as an input end of the first frequency band input matching network, and the second end of the third inductor is connected with the multiple connection point;
the first end of the fourth capacitor is used as an input end of the second frequency band input matching network, the second end of the fourth capacitor is connected with the multiple connection point, the first end of the fourth capacitor is electrically connected with the first end of the fourth inductor, and the second end of the fourth inductor is grounded.
Optionally, the device also comprises a multi-stage second subsequent matching network with different frequency bands;
Each second subsequent matching network is correspondingly connected with each input matching network.
Optionally, the inter-stage matching network includes a first frequency band inter-stage matching network and a second frequency band inter-stage matching network;
the first frequency band interstage matching network comprises a fifth inductor and a fifth capacitor, and the second frequency band interstage matching network comprises a sixth inductor and a sixth capacitor;
the first end of the fifth inductor is connected with the output end of the first-stage front-stage driving amplifier; the second end of the fifth inductor is connected with the multiple connection point, the first end of the fifth inductor is electrically connected with the first end of the fifth capacitor, and the second end of the fifth capacitor is grounded;
The first end of the sixth capacitor is connected with the output end of the second-stage front-stage driving amplifier, the second end of the sixth capacitor is connected with the multiple connection point, the first end of the sixth capacitor is electrically connected with the first end of the sixth inductor, and the second end of the sixth inductor is grounded.
According to the embodiment of the invention, the multi-frequency band radio frequency signal channel is formed by the matching networks, the front-stage driving amplifying module and the output-stage amplifying module, and as the matching networks of the frequency bands realize required matching impedance in the respective working frequency bands and have out-of-band rejection characteristics in other working frequency bands, the radio frequency input signals of the frequency bands correspondingly output radio frequency amplified signals of the frequency bands through the multi-frequency band radio frequency signal channel, and the ultra-large bandwidth output of the multi-frequency bands is realized by arranging the matching networks of the different frequency bands, so that the physical limitation of bandwidth bottleneck in the prior art is broken through.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a multi-frequency amplifying device according to an embodiment of the present invention;
Fig. 2 is a schematic diagram of a specific structure of a multi-frequency amplifying device according to an embodiment of the present invention;
Fig. 3 is a schematic diagram of a specific structure of another multi-frequency amplifying device according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of another multi-frequency amplifying device according to an embodiment of the present invention;
Fig. 5 is a schematic circuit diagram of a multi-frequency amplifying device according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a specific structure of another multi-frequency amplifying device according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of another multi-frequency amplifying device according to an embodiment of the present invention;
Fig. 8 is a schematic diagram of a specific structure of another multi-frequency amplifying device according to an embodiment of the present invention;
Fig. 9 is a schematic diagram of a specific structure of another multi-frequency amplifying device according to an embodiment of the present invention;
Fig. 10 is a schematic circuit diagram of another multi-frequency amplifying device according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any creative effort, shall fall within the protection scope of the invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a multi-frequency amplifying device according to an embodiment of the present invention, as shown IN fig. 1, the multi-frequency amplifying device includes a plurality of matching networks 10, a front-stage driving amplifying module 20 and an output-stage amplifying module 30 with different frequency bands, wherein each matching network 10, the front-stage driving amplifying module 20 and the output-stage amplifying module 30 form multi-frequency band radio frequency signal channels N1 and N2, and each frequency band radio frequency input signal IN1 and IN2 corresponds to each frequency band radio frequency signal channel N1 and N2, and each frequency band radio frequency amplified signal OUT1, OUT2 is outputted.
The front-stage driving amplifying module 20 can play a role in driving, the output-stage amplifying module 30 can play a role in output amplification, and the front-stage driving amplifying module 20 and the output-stage amplifying module 30 can form an amplifier;
The matching networks 10 of different frequency bands are designed to achieve the required matching impedance in the respective operating frequency band, but are designed to have out-of-band rejection characteristics in the operating frequency band of the other matching networks, and the impedance is high-impedance or specific. Taking the example that the matching networks of different frequency bands comprise a first frequency band matching network and a second frequency band matching network, namely when the amplifier formed by the front-stage driving amplifying module 20 and the output-stage amplifying module 30 works IN the first frequency band, the impedance of the second frequency band matching network IN the first frequency band is high-impedance or specific-impedance, so that the second frequency band matching network cannot influence the first frequency band matching network, when the amplifier works IN the second frequency band, the impedance of the first frequency band matching network IN the second frequency band is high-impedance or specific-impedance, so that the first frequency band matching network cannot influence the second frequency band matching network, the characteristic is applied to each matching network, so that each matching network 10, the front-stage driving amplifying module 20 and the output-stage amplifying module 30 can form a multi-frequency band radio frequency signal channel N, and thus, each frequency band radio frequency input signal IN1, IN2.
In this embodiment, the matching networks 10, the pre-stage driving amplifying module 20 and the output stage amplifying module 30 form a multi-band radio frequency signal channel, and because the matching networks of each band achieve the required matching impedance in each working band and are out-of-band rejection characteristics in other working bands, the radio frequency input signals of each band correspondingly output radio frequency amplified signals of each band through the radio frequency signal channels of each multi-band, and thus by setting the matching networks of a plurality of different bands, the ultra-large bandwidth output of the multi-band is realized, and the physical limitation of bandwidth bottleneck in the prior art is broken through. Meanwhile, the signals output by the radio frequency amplified signals OUT1, OUT2 of each frequency band are not mutually influenced, so that the output power and the efficiency of the radio frequency amplified signals of each frequency band are maintained.
Optionally, on the basis of the above embodiment, the specific types of the matching network 10, the pre-driving amplifying module 20 and the output stage amplifying module 30 in a plurality of different frequency bands in the multi-frequency amplifying device and how to form the multi-frequency band signal channels are further described; in this embodiment, the matching networks of a plurality of different frequency bands in the multi-frequency amplifying device are used as output matching networks, and the output matching networks, the front-stage driving amplifying module 20 and the output-stage amplifying module 30 form a multi-frequency signal channel for illustration, fig. 2 is a schematic diagram of a specific structure of the multi-frequency amplifying device provided in the embodiment of the invention, as shown in fig. 2, in some embodiments, the front-stage driving amplifying module 20 includes a front-stage driving amplifier 21, the output-stage amplifying module 30 includes an output-stage amplifier 31, and the matching network 10 includes an output matching network 11;
the input ends of the output matching networks 11 are connected to a multiplexing point a, the input ends of the front-stage driver amplifier 21 receive the radio frequency input signals IN1, IN2, the output ends of the front-stage driver amplifier 21 are electrically connected to the input ends of the output-stage amplifier 31, the output ends of the output-stage amplifier 31 are connected to the multiplexing point a, and the output ends of the output matching networks 11 output the radio frequency amplified signals OUT1, OUT2, IN frequency ranges.
The output matching networks 11 achieve the required matching impedance in the respective working frequency bands, and the other matching networks have out-of-band rejection characteristics in the working frequency bands, and the impedance is high-impedance or specific impedance. Taking the example that each output matching network 11 comprises a first frequency band output matching network and a second frequency band output matching network, when the front-stage driving amplifier 21 and the output-stage amplifier 31 work in the first frequency band, the second frequency band output matching network presents high impedance or specific impedance, the second frequency band output matching network does not influence the first frequency band output matching network, the radio frequency input signal of the first frequency band is directly fed into the first frequency band output matching network to output the radio frequency amplified signal of the first frequency band after being amplified by the front-stage driving amplifier 21 and the output-stage amplifier 31, when the front-stage driving amplifier 21 and the output-stage amplifier 31 work in the second frequency band, the first frequency band output matching network presents high impedance or specific impedance, the first frequency band output matching network does not influence the second frequency band output matching network, the radio frequency input signal of the second frequency band is directly amplified by the second frequency band output matching network after being amplified by the front-stage driving amplifier 21 and the output-stage amplifier 31, and the like, the various output matching networks of different frequency bands are arranged, thereby realizing the multi-band multi-frequency ultra-band ultra-bandwidth output and the wide bandwidth of the prior art with high bandwidth being widened. Meanwhile, the signals output by the radio frequency amplified signals OUT1, OUT2 of each frequency band are not mutually influenced, so that the output power and the efficiency of the radio frequency amplified signals of each frequency band are maintained.
It should be noted that, in this embodiment, the output end of the output stage amplifier 31 is connected to each output matching network through the multiplexing point a, so that the output end of the output stage amplifier 31 is prevented from being connected to each output matching network by using a signal gating switch in the prior art, and the output power and efficiency of the radio frequency amplified signals in each frequency band are further improved by using the multiplexing point. Optionally, further optimization is performed based on the embodiment of fig. 2, and fig. 3 is a schematic diagram of a specific structure of another multi-frequency amplifying device according to an embodiment of the present invention, where, as shown in fig. 3, the multi-frequency amplifying device further includes a common matching network 40, and the common matching network 40 is connected between the output end of the output stage amplifier 31 and the multiple connection point a. The public matching network 40 is arranged in front of the multiplexing point A, and the bandwidth of the public matching network 40 can cover each frequency band, so that the ultra-large bandwidth output of multiple frequency bands can be realized through the public matching network 40 and each output matching network, and the output power and the efficiency of the radio frequency amplified signals of each frequency band are improved.
Optionally, further optimization is performed on the basis of the embodiment of fig. 2, and fig. 4 is a schematic diagram of a specific structure of another multi-frequency amplifying device provided by the embodiment of the present invention, where, as shown in fig. 4, the multi-frequency amplifying device further includes a plurality of first subsequent matching networks 50 with different frequency bands, and each first subsequent matching network 50 is correspondingly connected to each output matching network 11. Each output matching network 11 may be further followed by each first subsequent matching network 50, and after the impedance constraint condition of the corresponding output matching network 11 is met, the first subsequent matching network 50 has a smaller influence on the output matching network, so that the matching impedance of the first subsequent matching network 50 is less limited.
The following description will be made of specific circuit structure diagrams of matching impedance of each output matching network, fig. 5 is a specific circuit diagram of a multi-frequency amplifying device provided by the embodiment of the present invention, as shown in fig. 5, the input matching network 11 includes a first frequency band input matching network 111 and a second frequency band input matching network 112, the first frequency band input matching network 111 includes a first inductor L1 and a first capacitor C1, the second frequency band input matching network 112 includes a second inductor L2 and a second capacitor C2, a first end of the first inductor L1 is connected to a multiplexing point a, a second end of the first inductor L1 is electrically connected to a first end of the first capacitor C1, a second end of the first capacitor C1 is used as an output end of the first frequency band output matching network 111, a first end of the second capacitor C2 is connected to a multiplexing point a, a second end of the second capacitor C2 is electrically connected to a first end of the second inductor L2, a second end of the second inductor L2 is grounded, and a second end of the second inductor L2 is used as an output end of the second frequency band output matching network 112.
Specifically, the first frequency band output matching network 111 formed by the first inductor L1 and the first capacitor C1 is a first frequency band (low frequency band) output matching network, the second frequency band (high frequency band) output matching network 111 formed by the second inductor L2 and the second capacitor C2 is a high frequency band matching network, when the first frequency band works, the first element is the second capacitor C2, the frequency response of the first element is high-pass, and the first frequency band presents high-resistance characteristics when the first frequency band works from the multiple connection point a to the second frequency band output matching network. When the second frequency band works, the first element is connected in series with the first inductor L1 when the first frequency band is seen from the multiple connection point A to the first frequency band output matching network, the frequency response is low-pass, and the second frequency band presents high-resistance characteristics, so that the radio frequency amplified signals of the frequency bands output by the two output matching networks are not influenced by each other. It will be understood, of course, that the output matching network of each frequency band may also change the impedance matching size by other topologies (LLC topologies), or by changing the internal parameter size, which is not particularly limited in this embodiment.
It should be understood that the frequency response characteristic combinations of the first band output matching network 111 and the second band output matching network 112 may be, in addition to the low-pass and high-pass combinations in the above embodiments, low-pass and band-pass, high-pass and band-pass, band-pass and band-pass, and the like, which are not limited in this embodiment.
Optionally, in other embodiments, the matching network 10 with multiple different frequency bands in the multi-frequency amplifying device may also be used as an input matching network, where the input matching network, the front-stage driving amplifying module 20 and the output-stage amplifying module 30 may also form a multi-frequency signal channel, fig. 6 is a schematic diagram of another multi-frequency amplifying device according to an embodiment of the present invention, and as shown in fig. 6, the front-stage driving amplifying module 20 includes a front-stage driving amplifier 21, the output-stage amplifying module 30 includes an output-stage amplifier 31, and the matching network 11 includes an input matching network 12;
Each input end of each input matching network 12 receives each frequency band radio frequency input signal IN1, IN2, each output end of each input matching network 12 is connected to a multiplexing point B, the multiplexing point B is connected to an input end of the pre-stage driver amplifier 21, an output end of the pre-stage driver amplifier 21 is electrically connected to an input end of the output stage amplifier 31, and an output end of the output stage amplifier 31 outputs each frequency band radio frequency amplified signal OUT1, OUT 2.
Each input matching network 12 is designed to achieve a desired matching impedance in a respective operating frequency band, and is designed to have an out-of-band rejection characteristic in the operating frequency band of the other matching networks, and the impedance is high-impedance or specific. Taking the example that each input matching network 12 includes a first frequency band input matching network and a second frequency band input matching network as the examples, when the first frequency band radio frequency signal is input, the second frequency band input matching network presents high impedance or specific impedance, the second frequency band input matching network does not influence the first frequency band input matching network, after the radio frequency input signal of the first frequency band is directly fed into the first frequency band output matching network, the radio frequency amplified signal of the first frequency band is amplified by the pre-driver amplifier 21 and the output stage amplifier 31, and the embodiment also realizes the ultra-large bandwidth output of multiple frequency bands by setting each input matching network of multiple different frequency bands, and the flexibility of broadband broadening is high, thereby breaking through the physical limitation of bandwidth bottleneck in the prior art. Meanwhile, the signals output by the radio frequency amplified signals OUT1, OUT2 of each frequency band are not mutually influenced, so that the output power and the efficiency of the radio frequency amplified signals of each frequency band are maintained.
It should be noted that, in this embodiment, the input terminal of the front stage driving amplifier 21 is connected through the multiplexing point B, so that the signal gating switch is avoided from being connected with the input terminal of the front stage driving amplifier 21 in the prior art, and the output power and efficiency of the rf amplified signals in each frequency band are further improved by using the multiplexing point.
Optionally, on the basis of the embodiment of fig. 6, a specific circuit diagram is further described for each frequency band input matching network 121, fig. 7 is a schematic circuit structure diagram of another multi-frequency amplifying device provided by the embodiment of the present invention, as shown in fig. 7, the input matching network 12 includes a first frequency band input matching network 121 and a second frequency band input matching network 122, the first frequency band input matching network 121 includes a third inductor L3 and a third capacitor C3, the second frequency band input matching network 122 includes a fourth inductor L4 and a fourth capacitor C4, a first end of the third inductor L3 is used as an input end of the first frequency band input matching network 121, a second end of the third inductor L3 is connected with the complex point B, a first end of the third inductor L3 is electrically connected with a first end of the third capacitor C3, a second end of the third capacitor C3 is grounded, a first end of the fourth capacitor C4 is used as an input end of the second frequency band input matching network 122, a second end of the fourth capacitor C4 is connected with the complex point B, and a first end of the fourth inductor L4 is electrically connected with a second end of the fourth inductor L4.
Specifically, the first frequency band input matching network 111 formed by the third inductor L3 and the third capacitor C3 is a first frequency band (low frequency band) matching network, and the second frequency band (high frequency band) input matching network 111 formed by the fourth inductor L4 and the fourth capacitor C4 is a high frequency band matching network, so that the radio frequency amplified signals of the frequency bands output by the two input matching networks do not affect each other. It will be understood, of course, that the input matching network of each frequency band may also change the impedance matching size by other topologies (LLC topologies), or by changing the internal parameter size, which is not particularly limited in this embodiment.
It should be further understood that the frequency response characteristic combinations of the first band input matching network 121 and the second band input matching network 1222 may be, in addition to the low-pass+high-pass combinations in the above embodiments, low-pass+band-pass, high-pass+band-pass, band-pass+band-pass, and the like, which are not limited in this embodiment.
Optionally, based on the embodiment of fig. 6, fig. 8 is a schematic diagram of a specific structure of another multi-frequency amplifying device according to the embodiment of the present invention, and as shown in fig. 8, the multi-frequency amplifying device further includes multiple-stage input second subsequent matching networks 60 with different frequency bands, where each second subsequent matching network 60 is correspondingly connected to each input matching network 12. Likewise, since the impedance matching of the input matching network satisfies the condition, the matching impedance condition of the second subsequent matching network is not limited.
Optionally, IN some embodiments, the matching network 10 with multiple different frequency bands IN the multi-frequency amplifying device may be further used as an inter-stage matching network, where the pre-stage driving amplifying module 20, the inter-stage matching network, and the output stage amplifying module 30 form a multi-frequency band signal channel for illustration, fig. 9 is a schematic structural diagram of another multi-frequency amplifying device provided IN an embodiment of the present invention, where the pre-stage driving amplifying module 20 includes a multi-stage pre-stage driving amplifier 21, the output stage amplifying module 30 includes an output stage amplifier 31, the matching network 11 includes an inter-stage matching network 13, an input terminal of each pre-stage driving amplifier 21 receives radio frequency input signals IN1 and IN2 of each frequency band, an output terminal of each pre-stage driving amplifier 21 is electrically connected to an input terminal of the inter-stage matching network 13, an output terminal of the inter-stage matching network 13 is connected to a multiplexing point C, the multiplexing point C is connected to an input terminal of the output stage amplifier 31, and an output terminal of the output stage amplifier 31 outputs radio frequency amplified signals OUT1 and OUT2 of each frequency band.
The inter-stage matching network 13 is configured to achieve a desired matching impedance in each operating frequency band, and is configured to have an out-of-band rejection characteristic in the operating frequency band of the other matching networks, and the impedance is high-impedance or specific impedance. Taking the case that the inter-stage matching network 13 includes a first frequency band inter-stage matching network and a second frequency band inter-stage matching network as an example, when a first frequency band radio frequency signal is input, the second frequency band inter-stage matching network presents high impedance or specific impedance, the radio frequency input signal of the first frequency band is directly fed into the corresponding front-stage driving amplifier 21 and the first frequency band inter-stage matching network 13 and is output after passing through the output-stage amplifier 31, when a second frequency band radio frequency signal is input, the first frequency band inter-stage matching network presents high impedance or specific impedance, the radio frequency input signal of the second frequency band is directly fed into the corresponding front-stage driving amplifier 21 and the second frequency band inter-stage matching network 13 and is output after passing through the output-stage amplifier 31, and so on, a plurality of inter-stage matching networks of different frequency bands are arranged, so that ultra-large bandwidth output of the frequency band is also realized.
In addition, when the first frequency band radio frequency signal is fed into the first frequency band radio frequency primary amplified signal which is output after corresponding to the front-stage driving amplifier and the first frequency inter-stage matching network, the second frequency band input matching network does not influence the influence of the first frequency band input matching network because the second frequency band inter-stage matching network presents high impedance or specific impedance, so that when the first frequency band radio frequency primary amplified signal is amplified again through the rear-stage driving amplifier to output the first frequency band radio frequency amplified signal, the output power and the efficiency of the first frequency band radio frequency amplified signal are realized. And so on, the output power and the efficiency of the radio frequency amplified signals of each frequency band are also realized.
It should be noted that, in this embodiment, the input terminal of the output stage amplifier 31 is connected to the multiplexing point C, so that the signal gating switch is avoided from being connected to the input terminal of the output stage amplifier 31 in the prior art, and the output power and efficiency of the rf amplified signals in each frequency band are further improved by using the multiplexing point.
Optionally, on the basis of the embodiment of fig. 9, each frequency band inter-stage matching network 13 is further described with a specific circuit diagram, fig. 10 is a specific circuit diagram of another multi-frequency amplifying device provided by the embodiment of the present invention, as shown in fig. 10, the inter-stage matching network 13 includes a first frequency band inter-stage matching network 131 and a second frequency band inter-stage matching network 132, the first frequency band inter-stage matching network 131 includes a fifth inductor L5 and a fifth capacitor C5, the second frequency band inter-stage matching network 132 includes a sixth inductor L6 and a sixth capacitor C6, a first end of the fifth inductor L5 is connected to an output end of the first stage pre-stage driving amplifier 211, a second end of the fifth inductor L5 is connected to the complex junction C, a first end of the fifth inductor L5 is electrically connected to a first end of the fifth capacitor C5, a second end of the fifth capacitor C5 is grounded, a first end of the sixth capacitor C6 is connected to an output end of the second stage pre-stage driving amplifier 212, a second end of the sixth capacitor C6 is connected to the complex junction C6, and a first end of the sixth inductor C6 is electrically connected to a second end of the sixth inductor L6.
Specifically, the first frequency band inter-stage matching network 131 formed by the fifth inductor L5 and the fifth capacitor C5 is a first frequency band (low frequency band) inter-stage matching network, and the second frequency band (high frequency band) inter-stage matching network 132 formed by the sixth inductor L6 and the sixth capacitor C6 is a high frequency band matching network, so that the radio frequency amplified signals of the frequency bands output by the two inter-stage matching networks do not affect each other. It will be understood that the inter-stage matching network of each frequency band may also be changed by other topologies (LLC topologies), or by changing the internal parameter size, so as to change the impedance matching size, which is not particularly limited in this embodiment.
It should be understood that the frequency response characteristics of the first frequency band interstage matching network 131 and the second frequency band interstage matching network 132 may be a combination of low pass and high pass in the above embodiment, such as low pass and band pass, high pass and band pass, and band pass.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
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