CN109412617B

CN109412617B - Radio frequency broadband amplification equipment and radio frequency gain control method

Info

Publication number: CN109412617B
Application number: CN201811379182.2A
Authority: CN
Inventors: 宗瑞朝; 余波; 熊连平; 刘玉玲; 杜泽永; 熊英; 孙贤勇
Original assignee: Chengdu Kt Electronic Hi Tech Co ltd
Current assignee: Chengdu Kt Electronic Hi Tech Co ltd
Priority date: 2018-11-19
Filing date: 2018-11-19
Publication date: 2020-12-04
Anticipated expiration: 2038-11-19
Also published as: CN109412617A

Abstract

The application provides radio frequency broadband amplification equipment and a radio frequency gain control method. The apparatus comprises: a first amplifying circuit externally connected with a radio frequency input signal; the second amplifying circuit is electrically connected with the first amplifying circuit through the attenuation regulating circuit and is used for obtaining a radio frequency output signal, wherein the attenuation regulating circuit is used for carrying out attenuation regulation on output gain between the radio frequency output signal and a radio frequency input signal; the first sampling circuit and the second sampling circuit are respectively used for carrying out signal sampling on the radio frequency input signal and the radio frequency output signal; the first temperature detection circuit and the second temperature detection circuit are respectively used for detecting the working temperatures of the first amplification circuit and the second amplification circuit; and the gain control circuit is used for sending an attenuation regulation instruction to the attenuation regulation circuit so as to enable the output gain regulated by the attenuation regulation circuit to be matched with the target gain. The equipment can automatically perform high-precision gain compensation according to the ambient temperature, and the influence of the ambient temperature on the equipment is weakened.

Description

Radio frequency broadband amplification equipment and radio frequency gain control method

Technical Field

The application relates to the technical field of radio frequency broadband amplification processing, in particular to radio frequency broadband amplification equipment and a radio frequency gain regulation and control method.

Background

With the continuous development of scientific technology, the radio frequency broadband amplification processing technology is widely applied to the fields of mobile communication systems, cable broadcast television systems, test instruments and the like, and the radio frequency broadband amplifier manufactured based on the video broadband amplification processing technology has the advantages of wide frequency band, high gain and the like, but most of the components of the common radio frequency broadband amplifier belong to power devices, so that the overall environmental adaptability is extremely weak, the phenomenon of large temperature drift caused by the influence of the external environmental temperature is easily caused, and the stable operation of the communication system applying the radio frequency broadband amplifier is threatened.

Disclosure of Invention

In order to overcome the above defects in the prior art, an object of the present application is to provide a radio frequency broadband amplification device and a radio frequency gain control method, where the radio frequency broadband amplification device can perform high-precision gain compensation according to the ambient temperature change, so as to weaken the influence of the ambient temperature on the device and ensure the environmental adaptability and the operation stability of the device.

As for a device, an embodiment of the present application provides a radio frequency broadband amplification device, including:

the first amplifying circuit is externally connected with a radio frequency input signal and is used for amplifying the radio frequency input signal by using the signal gain of the first amplifying circuit at the current working temperature;

the second amplifying circuit is electrically connected with the first amplifying circuit through an attenuation regulating and controlling circuit and is used for amplifying the radio frequency input signal amplified by the first amplifying circuit by using the signal gain of the second amplifying circuit at the current working temperature to obtain a radio frequency output signal, wherein the attenuation regulating and controlling circuit is used for carrying out attenuation regulation and control on the output gain between the radio frequency output signal and the radio frequency input signal;

the first sampling circuit is used for carrying out signal sampling on the radio frequency input signal;

the second sampling circuit is used for carrying out signal sampling on the radio frequency output signal;

the first temperature detection circuit is used for detecting the working temperature of the first amplification circuit;

the second temperature detection circuit is used for detecting the working temperature of the second amplification circuit;

and the gain control circuit is electrically connected with the first sampling circuit, the second sampling circuit, the first temperature detection circuit, the second temperature detection circuit and the attenuation regulation and control circuit, wherein the gain control circuit is used for sending an attenuation regulation and control instruction to the attenuation regulation and control circuit according to the output gain between the radio frequency output signal and the radio frequency input signal, the working temperature of the first amplification circuit, the working temperature of the second amplification circuit and the gain attenuation value currently provided by the attenuation regulation and control circuit, so that the output gain regulated and controlled by the attenuation regulation and control circuit is matched with the target gain.

As a method, an embodiment of the present application provides a radio frequency gain control method, applied to a gain control circuit in a radio frequency broadband amplification device, where the device stores signal gains of a first amplification circuit and a second amplification circuit at different operating temperatures, and the method includes:

acquiring respective corresponding working temperatures of the first amplifying circuit and the second amplifying circuit, and acquiring current corresponding signal gains of the first amplifying circuit and the second amplifying circuit according to the acquired working temperatures;

calculating output gain between the sampled radio frequency output signal and the radio frequency input signal, and comparing the output gain with a target gain;

when the output gain is not equal to the target gain, generating a corresponding attenuation regulation instruction according to a gain difference value between the output gain and the target gain, the current signal gain of the first amplifying circuit, the current signal gain of the second amplifying circuit and a gain attenuation value currently provided by an attenuation regulation and control circuit, and sending the attenuation regulation and control instruction to the attenuation regulation and control circuit so that the attenuation regulation and control circuit performs attenuation regulation and control according to the attenuation regulation and control instruction.

Compared with the prior art, the radio frequency broadband amplification device and the radio frequency gain control method provided by the embodiment of the application have the following beneficial effects: the radio frequency broadband amplification equipment can perform high-precision gain compensation according to the change of the ambient temperature, weaken the influence of the ambient temperature on the equipment and ensure the environmental adaptability and the operation stability of the equipment. A first amplifying circuit in the radio frequency broadband amplifying device is externally connected with a radio frequency input signal and is connected with a second amplifying circuit through an attenuation regulating circuit, wherein the first amplifying circuit is used for carrying out signal amplification on the radio frequency input signal by using the signal gain of the first amplifying circuit at the current working temperature, the second amplifying circuit is used for carrying out signal amplification on the radio frequency input signal amplified by the first amplifying circuit by using the signal gain of the second amplifying circuit at the current working temperature to obtain a corresponding radio frequency output signal, and the attenuation regulating circuit is used for carrying out attenuation regulation on the output gain between the radio frequency output signal and the radio frequency input signal. A first sampling circuit and a second sampling circuit in the radio frequency broadband amplification device are respectively used for carrying out signal sampling on the radio frequency input signal and the radio frequency output signal, and a first temperature detection circuit and a second temperature detection circuit are respectively used for detecting the working temperatures of the first amplification circuit and the second amplification circuit. The gain control circuit in the radio frequency broadband amplifying device is electrically connected with the first sampling circuit, the second sampling circuit, the first temperature detection circuit, the second temperature detection circuit and the attenuation regulation and control circuit, the attenuation control circuit is used for sending an attenuation control instruction to the attenuation control circuit according to the sampled output gain between the radio frequency output signal and the radio frequency input signal, the working temperature of the first amplifying circuit, the working temperature of the second amplifying circuit and the gain attenuation value currently provided by the attenuation control circuit so as to enable the output gain regulated by the attenuation control circuit to be matched with a target gain, therefore, the influence of the ambient temperature on the equipment is weakened, the equipment can be ensured to carry out high-precision gain compensation according to the ambient temperature change, and the environmental adaptability and the running stability of the equipment are improved.

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments are briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope of the claims of the present application, and it is obvious for those skilled in the art that other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic block diagram of a radio frequency broadband amplifying device according to an embodiment of the present disclosure.

Fig. 2 is another block diagram of a radio frequency broadband amplification device according to an embodiment of the present disclosure.

Fig. 3 is a schematic flowchart of a radio frequency gain control method according to an embodiment of the present disclosure.

Fig. 4 is another schematic flow chart of a radio frequency gain adjustment and control method according to an embodiment of the present application.

Icon: 100-radio frequency broadband amplification equipment; 110-a first amplification circuit; 120-attenuation regulation and control circuit; 130-a second amplification circuit; 140-a first sampling circuit; 150-a second sampling circuit; 160-a first temperature detection circuit; 170-a second temperature detection circuit; 180-gain control circuitry; 121-coarse attenuation controller; 122-attenuation fine tuning controller.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is noted that the terms "first", "second", "third", and the like are used merely for distinguishing between descriptions and are not intended to indicate or imply relative importance.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Fig. 1 is a block diagram of a radio frequency broadband amplifying device 100 according to an embodiment of the present disclosure. In the embodiment of the present application, the radio frequency broadband amplification device 100 can perform high-precision gain compensation according to the ambient temperature change, weaken the influence of the ambient temperature on the device, and ensure the environmental adaptability and the operation stability of the device. The operating frequency range of the radio frequency broadband amplification device 100 is 87 MHz-1250 MHz, the radio frequency broadband amplification device 100 can control the precision of gain compensation within 0.3dB, and stably regulate and control the output gain of the radio frequency broadband amplification device 100 when the external environment temperature is within the range of-40 ℃ to +80 ℃, and the output gain is the signal gain of the radio frequency signal obtained after the amplification processing by the radio frequency broadband amplification device 100 relative to the signal gain of the radio frequency signal just accessed to the radio frequency broadband amplification device 100.

In this embodiment, the radio frequency broadband amplification device 100 includes a first amplification circuit 110, an attenuation regulation circuit 120, a second amplification circuit 130, a first sampling circuit 140, a second sampling circuit 150, a first temperature detection circuit 160, a second temperature detection circuit 170, and a gain control circuit 180. Radio frequency broadband amplification equipment 100 passes through first amplifier circuit 110, decay regulation and control circuit 120 and the mutual cooperation of second amplifier circuit 130 realizes the amplification of radio frequency signal and handles, radio frequency broadband amplification equipment 100 passes through decay regulation and control circuit 120, first sampling circuit 140 second sampling circuit 150 first temperature detect circuit 160 second temperature detect circuit 170 and the cooperation between the gain control circuit 180 ensures that self can carry out the gain compensation of high accuracy according to the ambient temperature change by oneself, weakens the influence of ambient temperature to self output gain.

In this embodiment, the first amplifying circuit 110 is externally connected to a radio frequency input signal, so as to perform signal amplification processing on the radio frequency input signal through a signal gain of the first amplifying circuit at the current operating temperature. The first amplifying circuit 110 can access a radio frequency input signal connected to a radio frequency input port by connecting to a radio frequency component including the radio frequency input port.

In this embodiment, the first amplifying circuit 110 includes a signal amplifier, and the first amplifying circuit 110 performs signal amplification processing on the accessed radio frequency input signal through the signal amplifier, where a signal gain of the signal amplifier is a signal gain of the first amplifying circuit 110.

In this embodiment, the first amplifying circuit 110 is electrically connected to the attenuation regulating circuit 120, and is configured to transmit the radio frequency input signal amplified by the first amplifying circuit 110 to the attenuation regulating circuit 120, and perform signal attenuation processing on the amplified radio frequency input signal by the attenuation regulating circuit 120.

In this embodiment, the attenuation control circuit 120 is electrically connected to the second amplifying circuit 130, and is configured to send the radio frequency input signal attenuated by the attenuation control circuit 120 to the second amplifying circuit 130, and perform signal amplification on the attenuated radio frequency input signal by the second amplifying circuit 130 to obtain a corresponding radio frequency output signal. The current output gain between the rf output signal and the rf input signal is equal to a sum of a signal gain value provided by the first amplifying circuit 110 at the corresponding current operating temperature, a gain attenuation value currently provided by the attenuation regulating circuit 120, and a signal gain value provided by the second amplifying circuit 130 at the corresponding current operating temperature.

The second amplifying circuit 130 may output the radio frequency output signal obtained by processing the radio frequency input signal by the radio frequency broadband amplifying device 100 in a manner of being connected to a radio frequency component including a radio frequency output port.

In this embodiment, the second amplifying circuit 130 includes a signal amplifier, and the second amplifying circuit 130 performs signal amplification processing on the radio frequency input signal processed by the first amplifying circuit 110 and the attenuation regulating and controlling circuit 120 through the signal amplifier to obtain a corresponding radio frequency output signal, where a signal gain of the signal amplifier is a signal gain of the second amplifying circuit 130.

In this embodiment, the first sampling circuit 140 is configured to perform signal sampling on the radio frequency input signal externally connected to the first amplifying circuit 110, and the second sampling circuit 150 is configured to perform signal sampling on the radio frequency output signal output by the second amplifying circuit 130.

In this embodiment, the first temperature detection circuit 160 is configured to detect an operating temperature of the first amplification circuit 110, and the second temperature detection circuit 170 is configured to detect an operating temperature of the second amplification circuit 130.

The first temperature detection circuit 160 includes at least one temperature sensor, and the temperature sensor included in the first temperature detection circuit 160 is disposed around the first amplification circuit 110 to detect an operating temperature of the first amplification circuit 110. When the first temperature detection circuit 160 includes a plurality of temperature sensors, the radio frequency broadband amplification device 100 takes an average value between respective temperature values detected by the plurality of temperature sensors as an operating temperature of the first amplification circuit 110.

Wherein the second temperature detection circuit 170 includes at least one temperature sensor, and the temperature sensor included in the second temperature detection circuit 170 is disposed around the second amplification circuit 130 to detect the operating temperature of the second amplification circuit 130. When the second temperature detection circuit 170 includes a plurality of temperature sensors, the radio frequency broadband amplification device 100 takes an average value between respective temperature values detected by the plurality of temperature sensors as an operating temperature of the second amplification circuit 130.

In this embodiment, the gain control circuit 180 stores the signal gains of the first amplifier circuit 110 and the second amplifier circuit 130 at different operating temperatures. The gain control circuit 180 is electrically connected to the first sampling circuit 140 and the second sampling circuit 150, and is configured to obtain the sampled radio frequency output signal and the sampled radio frequency input signal, and calculate an output gain between the radio frequency output signal and the radio frequency input signal.

The gain control circuit 180 is electrically connected to the first temperature detection circuit 160 and the second temperature detection circuit 170, and is configured to obtain a current working temperature of the first amplification circuit 110 and a current working temperature of the second amplification circuit 130, and obtain a current corresponding signal gain of the first amplification circuit 110 and a current corresponding signal gain of the second amplification circuit 130 based on the obtained working temperatures.

In this embodiment, the gain control circuit 180 is further electrically connected to the attenuation control circuit 120, and is configured to obtain a gain attenuation value currently provided by the attenuation control circuit 120, generate an attenuation control instruction for controlling a current gain attenuation value of the radio frequency broadband amplification device 100 according to the current output gain, the currently provided gain attenuation value, a currently corresponding signal gain of the first amplification circuit 110, a currently corresponding signal gain of the second amplification circuit 130, and a target gain, and send the attenuation control instruction to the attenuation control circuit 120, so that the attenuation control circuit 120 controls the currently provided gain attenuation value according to the attenuation control instruction, and thus the output gain controlled by the attenuation control circuit 120 is the same as the target gain and is matched with the target gain. The target gain is a signal gain that the radio frequency broadband amplification apparatus 100 finally achieves for the radio frequency input signal.

In the present embodiment, it is assumed that the output gain of the radio frequency broadband amplification device 100 in the normal temperature environment is equal to the target gain, when the radio frequency broadband amplification device 100 enters a high temperature environment from a normal temperature environment, the signal gains corresponding to the first amplification circuit 110 and the second amplification circuit 130 will decrease, and if the gain attenuation value provided by the attenuation control circuit 120 remains unchanged, the obtained output gain is smaller than the target gain, and the gain difference between the output gain and the target gain is negative, so that the gain attenuation value provided by the attenuation control circuit 120 needs to be reduced, so that the sum of the adjusted gain attenuation value, the signal gain corresponding to the first amplifier circuit 110, and the signal gain corresponding to the second amplifier circuit 130, i.e., the adjusted output gain, is the same as the target gain.

When the radio frequency broadband amplification device 100 enters a low-temperature environment from a normal-temperature environment, the signal gains corresponding to the first amplification circuit 110 and the second amplification circuit 130 will rise, at this time, if the gain attenuation value provided by the attenuation control circuit 120 remains unchanged, the corresponding obtained output gain will be greater than the target gain, at this time, the gain difference between the output gain and the target gain is a positive number, and the gain attenuation value provided by the attenuation control circuit 120 needs to be increased, so that the adjusted gain attenuation value, the sum value between the signal gain corresponding to the first amplification circuit 110 and the signal gain corresponding to the second amplification circuit 130, that is, the adjusted output gain, is the same as and matched with the target gain.

Fig. 2 is a block diagram of another radio frequency broadband amplifying device 100 according to an embodiment of the present disclosure. In the embodiment of the present application, the attenuation regulation circuit 120 includes a coarse attenuation controller 121 and a fine attenuation controller 122, and the attenuation regulation instruction includes a coarse attenuation instruction for the coarse attenuation controller 121 and a fine attenuation instruction for the fine attenuation controller 122.

In this embodiment, the attenuation fine-tuning controller 122 is electrically connected to the gain control circuit 180, and is configured to provide a fine-tuned gain attenuation value to the rf input signal according to the attenuation fine-tuning instruction sent by the gain control circuit 180. The fine tuning precision corresponding to the attenuation fine tuning controller 122 can be within 0.3 dB.

In this embodiment, the coarse attenuation controller 121 is electrically connected to the gain control circuit 180, and is configured to provide a coarse gain attenuation value to the rf input signal according to the coarse attenuation instruction sent by the gain control circuit 180. Wherein, the coarse attenuation controller 121 defaults to provide a 15dB gain attenuation value during initial operation, and the coarse tuning accuracy corresponding to the coarse attenuation controller 121 can reach 1dB or 0.5 dB.

In this embodiment, the coarse attenuation controller 121 is electrically connected to the fine attenuation controller 122, and the amplified rf input signal is transmitted between the coarse attenuation controller 121 and the fine attenuation controller 122. In an implementation manner of this embodiment, the coarse attenuation controller 121 is electrically connected to the first amplifying circuit 110, the fine attenuation controller 122 is electrically connected to the second amplifying circuit 130, and the rf input signal amplified by the first amplifying circuit 110 is processed by the coarse attenuation controller 121 and the fine attenuation controller 122 in sequence and then transmitted to the second amplifying circuit 130. In another implementation manner of this embodiment, the fine attenuation controller 122 is electrically connected to the first amplifying circuit 110, the coarse attenuation controller 121 is electrically connected to the second amplifying circuit 130, and the rf input signal amplified by the first amplifying circuit 110 is processed by the fine attenuation controller 122 and the coarse attenuation controller 121 in sequence and then transmitted to the second amplifying circuit 130.

In this embodiment, the gain control circuit 180 stores a preset gain offset value, and the gain control circuit 180 performs a difference operation on the output gain between the sampled rf output signal and the sampled rf input signal and the target gain to obtain a gain difference between the output gain and the target gain. The gain control circuit 180 compares the absolute value of the gain difference with the preset gain offset value, and determines whether to control the coarse attenuation controller 121 and the fine attenuation controller 122 to adjust the gain attenuation value or to control the coarse attenuation controller 121 and the fine attenuation controller 122 to adjust the gain attenuation value. The preset gain offset value may be 0.5dB, or 0.4dB, or 0.6dB, and the specific value may be configured differently according to the requirement.

Optionally, when the absolute value of the gain difference between the output gain and the target gain is not less than a preset gain offset value, the gain control circuit 180 sends a coarse attenuation instruction and a fine attenuation instruction matching the gain difference to the coarse attenuation controller 121 and the fine attenuation controller 122, respectively, so as to control both the coarse attenuation controller 121 and the fine attenuation controller 122 to adjust the gain attenuation value.

Alternatively, when the absolute value of the gain difference between the output gain and the target gain is smaller than a preset gain offset value, the gain control circuit 180 sends an attenuation fine-tuning instruction matched with the gain difference to the attenuation fine-tuning controller 122 to control the attenuation fine-tuning controller 122 to adjust the gain attenuation value.

In this embodiment, the radio frequency broadband amplification device 100 implements amplification processing on radio frequency signals through the mutual cooperation of the first amplification circuit 110, the attenuation regulation and control circuit 120 and the second amplification circuit 130, and the radio frequency broadband amplification device 100 ensures that it can perform high-precision gain compensation according to the change of ambient temperature by itself through the cooperation among the attenuation regulation and control circuit 120, the first sampling circuit 140, the second sampling circuit 150, the first temperature detection circuit 160, the second temperature detection circuit 170 and the gain control circuit 180, so as to weaken the influence of ambient temperature on its output gain, thereby ensuring the environmental adaptability and the operation stability of the device.

Fig. 3 is a schematic flow chart of a radio frequency gain adjustment and control method according to an embodiment of the present application. In the embodiment of the present application, the radio frequency gain control method is applied to the gain control circuit 180 in the radio frequency broadband amplification device 100, and the radio frequency broadband amplification device 100 stores signal gains of the first amplification circuit 110 and the second amplification circuit 130 at different operating temperatures. The specific process and steps of the rf gain control method shown in fig. 3 are explained in detail below.

Step S210, obtaining respective corresponding operating temperatures of the first amplifying circuit 110 and the second amplifying circuit 130, and obtaining current corresponding signal gains of the first amplifying circuit 110 and the second amplifying circuit 130 according to the obtained operating temperatures.

In this embodiment, the gain control circuit 180 obtains the current corresponding signal gain of the first amplifying circuit 110 by searching the signal gain matching the operating temperature detected by the first temperature detecting circuit 160 from the stored signal gains of the first amplifying circuit 110 at different operating temperatures. The gain control circuit 180 obtains the current corresponding signal gain of the second amplifier circuit 130 by searching the signal gain matched with the operating temperature detected by the second temperature detection circuit 170 from the stored signal gains of the second amplifier circuit 130 at different operating temperatures.

Step S220, calculating an output gain between the sampled rf output signal and the rf input signal, and comparing the output gain with a target gain.

In this embodiment, the gain control circuit 180 obtains the rf input signal through the first sampling circuit 140, and the gain control circuit 180 obtains the rf output signal through the second sampling circuit 150.

Step S230, when the output gain is not equal to the target gain, generating a corresponding attenuation control instruction according to a gain difference between the output gain and the target gain, the current signal gain of the first amplifying circuit 110, the current signal gain of the second amplifying circuit 130, and a gain attenuation value currently provided by the attenuation control circuit 120, and sending the attenuation control instruction to the attenuation control circuit 120.

In this embodiment, after the gain control circuit 180 sends the attenuation regulation instruction to the attenuation regulation circuit 120, the attenuation regulation circuit 120 adjusts the currently provided gain attenuation value according to the attenuation regulation instruction, so that the output gain regulated by the attenuation regulation circuit 120 is equal to and matched with the target gain.

Optionally, in this embodiment, the attenuation regulating and controlling circuit 120 includes a coarse attenuation controller 121 and a fine attenuation controller 122, and the attenuation regulating and controlling instruction includes a coarse attenuation instruction for the coarse attenuation controller 121 and a fine attenuation instruction for the fine attenuation controller 122. The step of generating a corresponding attenuation control command according to the gain difference between the output gain and the target gain, the current signal gain of the first amplifier circuit 110, the current signal gain of the second amplifier circuit 130, and the gain attenuation value currently provided by the attenuation control circuit 120 includes:

if the gain difference value is a positive number, comparing the absolute value of the gain difference value with a preset gain offset value;

when the absolute value is smaller than the preset gain offset value, calculating a current signal gain sum value between the first amplifier circuit 110 and the second amplifier circuit 130, and generating an attenuation fine-tuning instruction for instructing the attenuation fine-tuning controller 122 to increase the attenuation according to the target gain, the signal gain sum value, and a gain attenuation value currently provided by the attenuation control circuit 120.

In this embodiment, the step of generating the corresponding attenuation control command according to the gain difference between the output gain and the target gain, the current signal gain of the first amplifier circuit 110, the current signal gain of the second amplifier circuit 130, and the gain attenuation value currently provided by the attenuation control circuit 120 further includes:

when the gain difference is a positive number and the absolute value is not less than the preset gain offset value, calculating a current signal gain sum between the first amplifier circuit 110 and the second amplifier circuit 130, and generating a coarse attenuation command and a fine attenuation command for instructing the coarse attenuation controller 121 and the fine attenuation controller 122 to increase attenuation according to the target gain, the signal gain sum, and a gain attenuation value currently provided by the attenuation control circuit 120.

if the gain difference value is a negative number, comparing the absolute value of the gain difference value with a preset gain offset value;

when the absolute value is smaller than the preset gain offset value, calculating a current signal gain sum value between the first amplifier circuit 110 and the second amplifier circuit 130, and generating an attenuation fine-tuning instruction for instructing the attenuation fine-tuning controller 122 to reduce the attenuation according to the target gain, the signal gain sum value, and a gain attenuation value currently provided by the attenuation control circuit 120.

when the gain difference is a negative number and the absolute value is not less than the preset gain offset value, calculating a current signal gain sum between the first amplifier circuit 110 and the second amplifier circuit 130, and generating a coarse attenuation command and a fine attenuation command for instructing the coarse attenuation controller 121 and the fine attenuation controller 122 to reduce the attenuation according to the target gain, the signal gain sum and a gain attenuation value currently provided by the attenuation control circuit 120.

Fig. 4 is a schematic flow chart of a radio frequency gain adjustment and control method according to an embodiment of the present application. In this embodiment of the application, before the step S210, the method for adjusting and controlling the rf gain may further include:

step S209, configure and store the preset gain offset value and the target gain.

In summary, in the radio frequency broadband amplification device and the radio frequency gain control method provided in the embodiments of the present application, the radio frequency broadband amplification device can perform high-precision gain compensation according to the ambient temperature change, so as to weaken the influence of the ambient temperature on the device and ensure the environmental adaptability and the operation stability of the device. A first amplifying circuit in the radio frequency broadband amplifying device is externally connected with a radio frequency input signal and is connected with a second amplifying circuit through an attenuation regulating circuit, wherein the first amplifying circuit is used for carrying out signal amplification on the radio frequency input signal by using the signal gain of the first amplifying circuit at the current working temperature, the second amplifying circuit is used for carrying out signal amplification on the radio frequency input signal amplified by the first amplifying circuit by using the signal gain of the second amplifying circuit at the current working temperature to obtain a corresponding radio frequency output signal, and the attenuation regulating circuit is used for carrying out attenuation regulation on the output gain between the radio frequency output signal and the radio frequency input signal. A first sampling circuit and a second sampling circuit in the radio frequency broadband amplification device are respectively used for carrying out signal sampling on the radio frequency input signal and the radio frequency output signal, and a first temperature detection circuit and a second temperature detection circuit are respectively used for detecting the working temperatures of the first amplification circuit and the second amplification circuit. The gain control circuit in the radio frequency broadband amplifying device is electrically connected with the first sampling circuit, the second sampling circuit, the first temperature detection circuit, the second temperature detection circuit and the attenuation regulation and control circuit, the attenuation control circuit is used for sending an attenuation control instruction to the attenuation control circuit according to the sampled output gain between the radio frequency output signal and the radio frequency input signal, the working temperature of the first amplifying circuit, the working temperature of the second amplifying circuit and the gain attenuation value currently provided by the attenuation control circuit so as to enable the output gain regulated by the attenuation control circuit to be matched with a target gain, therefore, the influence of the ambient temperature on the equipment is weakened, the equipment can be ensured to carry out high-precision gain compensation according to the ambient temperature change, and the environmental adaptability and the running stability of the equipment are improved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A radio frequency broadband amplification device, the device comprising:

the gain control circuit is electrically connected with the first sampling circuit, the second sampling circuit, the first temperature detection circuit, the second temperature detection circuit and the attenuation regulation and control circuit, wherein the gain control circuit is used for sending an attenuation regulation and control instruction to the attenuation regulation and control circuit according to the output gain between the radio frequency output signal and the radio frequency input signal obtained by sampling, the working temperature of the first amplification circuit, the working temperature of the second amplification circuit and the gain attenuation value currently provided by the attenuation regulation and control circuit, so that the output gain regulated and controlled by the attenuation regulation and control circuit is matched with a target gain;

the sampled output gain between the radio frequency output signal and the radio frequency input signal is equal to a sum of a signal gain value provided by the first amplifying circuit at a corresponding working temperature, a gain attenuation value currently provided by the attenuation regulating and controlling circuit and a signal gain value provided by the second amplifying circuit at a corresponding working temperature, and the target gain is a signal gain which is finally achieved by the radio frequency broadband amplifying device for the radio frequency input signal.

2. The apparatus of claim 1, wherein the attenuation regulation circuitry comprises an attenuation coarse control and an attenuation fine control, and wherein the attenuation regulation instructions comprise an attenuation coarse adjustment instruction and an attenuation fine adjustment instruction;

the attenuation fine-tuning controller is electrically connected with the gain control circuit and used for providing a fine-tuned gain attenuation value for the radio frequency input signal according to an attenuation fine-tuning instruction sent by the gain control circuit;

the coarse attenuation controller is electrically connected with the gain control circuit and used for providing a coarse gain attenuation value for the radio frequency input signal according to a coarse attenuation instruction sent by the gain control circuit;

the coarse attenuation controller is electrically connected with the fine attenuation controller, and the amplified radio frequency input signal is transmitted between the coarse attenuation controller and the fine attenuation controller;

when the absolute value of the gain difference between the output gain and the target gain is not less than a preset gain offset value, the gain control circuit sends a coarse attenuation instruction and a fine attenuation instruction which are matched with the gain difference to the coarse attenuation controller and the fine attenuation controller respectively; and the gain control circuit sends an attenuation fine adjustment instruction matched with the gain difference value to the attenuation fine adjustment controller when the absolute value of the gain difference value between the output gain and the target gain is smaller than a preset gain offset value.

3. The apparatus of claim 1 or 2, wherein the first temperature detection circuit comprises at least one temperature sensor, the temperature sensor comprised by the first temperature detection circuit being disposed around the first amplification circuit to detect an operating temperature of the first amplification circuit.

4. The apparatus of claim 3, wherein the second temperature detection circuit comprises at least one temperature sensor, the temperature sensor comprised by the second temperature detection circuit being disposed around a second amplification circuit to detect an operating temperature of the second amplification circuit.

5. A method for adjusting and controlling gain of radio frequency, applied to a gain control circuit in a radio frequency broadband amplification device as claimed in any one of claims 1 to 4, wherein the device stores signal gains of a first amplification circuit and a second amplification circuit at different operating temperatures, and the method comprises:

6. The method of claim 5, wherein the attenuation control circuit comprises a coarse attenuation controller and a fine attenuation controller, the attenuation control commands comprise a coarse attenuation command and a fine attenuation command, and the step of generating the corresponding attenuation control commands according to the gain difference between the output gain and the target gain, the current signal gain of the first amplifying circuit, the current signal gain of the second amplifying circuit, and the gain attenuation value currently provided by the attenuation control circuit comprises:

and when the absolute value is smaller than the preset gain deviation value, calculating a current signal gain sum value between the first amplifying circuit and the second amplifying circuit, and generating an attenuation fine-tuning instruction for instructing the attenuation fine-tuning controller to increase the attenuation according to the target gain, the signal gain sum value and a gain attenuation value currently provided by the attenuation regulating and controlling circuit.

7. The method of claim 6, wherein the step of generating the corresponding attenuation control command according to the gain difference between the output gain and the target gain, the current signal gain of the first amplifying circuit, the current signal gain of the second amplifying circuit, and the gain attenuation value currently provided by the attenuation control circuit further comprises:

and when the gain difference value is a positive number and the absolute value is not less than the preset gain offset value, calculating the current signal gain sum value between the first amplifying circuit and the second amplifying circuit, and generating a coarse attenuation instruction and a fine attenuation instruction for instructing the coarse attenuation controller and the fine attenuation controller to increase the attenuation according to the target gain, the signal gain sum value and the gain attenuation value currently provided by the attenuation regulating and controlling circuit.

8. The method according to claim 6 or 7, wherein the step of generating the corresponding attenuation control command according to the gain difference between the output gain and the target gain, the current signal gain of the first amplifying circuit, the current signal gain of the second amplifying circuit, and the gain attenuation value currently provided by the attenuation control circuit further comprises:

and when the absolute value is smaller than the preset gain offset value, calculating a current signal gain sum value between the first amplifying circuit and the second amplifying circuit, and generating an attenuation fine-tuning instruction for instructing the attenuation fine-tuning controller to reduce the attenuation according to the target gain, the signal gain sum value and a gain attenuation value currently provided by the attenuation regulating and controlling circuit.

9. The method of claim 8, wherein the step of generating the corresponding attenuation control command according to the gain difference between the output gain and the target gain, the current signal gain of the first amplifying circuit, the current signal gain of the second amplifying circuit, and the gain attenuation value currently provided by the attenuation control circuit further comprises:

and when the gain difference value is a negative number and the absolute value is not smaller than the preset gain offset value, calculating the current signal gain sum value between the first amplifying circuit and the second amplifying circuit, and generating a coarse attenuation instruction and a fine attenuation instruction for instructing the coarse attenuation controller and the fine attenuation controller to reduce the attenuation according to the target gain, the signal gain sum value and the gain attenuation value currently provided by the attenuation regulating and controlling circuit.

10. The method of claim 9, further comprising:

and configuring and storing the preset gain deviation value and the target gain.