CN204886886U

CN204886886U - RF power amplifying modular

Info

Publication number: CN204886886U
Application number: CN201520591880.4U
Authority: CN
Inventors: 王云辉; 喻德财; 王定军
Original assignee: CHONGQING ZHONGKE ZHANCHU ELECTRONICS Co Ltd
Current assignee: CHONGQING ZHONGKE ZHANCHU ELECTRONICS Co Ltd
Priority date: 2015-08-07
Filing date: 2015-08-07
Publication date: 2015-12-16
Anticipated expiration: 2025-08-07

Abstract

The utility model relates to a power amplifier technical field specifically discloses a RF power amplifying modular, and it includes that power module reaches and power module electric connection's power tube, the power includes a first power and a second source, and the power tube includes first order power tube and second level power tube, first order power tube and second level power tube are divided equally otherly and this first power and second source electric connection, and this first order power tube one end electric connection in proper order has input coupling electric capacity and attenuator, and second level power tube one end electric connection has the output matching network circuit, and it has an interstage coupling capacitance to go back electric connection between this first order power tube and the second level power tube. The utility model discloses the stability that can improve the transistor can keep good radio -frequency performance again.

Description

Radio frequency power amplification module

Technical field

The utility model relates to power amplifier technology field, particularly relates to a kind of radio frequency power amplification modules.

Background technology

Radio-frequency power amplifier (RFPA) is the important component part of various transmitting set.In the front stage circuits of transmitter, the RF signal power that modulation oscillator circuit produces is very little, need, through a series of amplification one buffer stage, interstage amplifier section, final power amplifying stage, after obtaining enough radio-frequency powers, just can be fed on antenna and radiate.In order to obtain enough large radio frequency power output, radio-frequency power amplifier must be adopted.

In the desirable radio circuit course of work, electric current can be divided equally in multiple HBT transistor, and therefore the problem of local overheating can not produce.But can have between the actual each transistor of HBT device that some are slight asymmetric, in actual radio frequency circuit working, the working temperature of certain transistor higher than the working temperature of other transistors, and may produce large electric current.There is the crystal pipe of high temperature because produce too much heat during operation thus may heat loss be caused, and damage transistor due to the increase of base current, the whole power amplifier integrated circuit of final damage.Operationally there is unstable risk in a lot of power amplifier circuit of the prior art, there will be the phenomenon of circuit concussion.Therefore, the stability that we need a kind of circuit structure can improve transistor can keep good radio-frequency performance again.

Utility model content

The purpose of this utility model is, proposes a kind of radio frequency power amplification module, and its stability that can improve transistor can keep good radio-frequency performance again.

For achieving the above object, the utility model provides a kind of radio frequency power amplification module, it comprises: power module and the power tube be electrically connected with power module, described power supply comprises one first power supply and second source, power tube comprises first order power tube and second level power tube, described first order power tube and second level power tube are electrically connected with this first power supply and second source respectively, this first order power tube one end is electrically connected with input coupling capacitance and attenuator successively, power tube one end, the second level is electrically connected with output matching network circuit, a blocking condenser is also electrically connected with between this first order power tube and second level power tube.

Wherein, electric capacity C6, the resistance R11 of electric connection, resistance R9, resistance R8, resistance R7, resistance R6 and electric capacity C5 is included in described first power supply; The electric capacity C17 of connection parallel with one another, electric capacity C10, electric capacity C11, inductance L 4 and electric capacity C9 is included in described second source.

In the utility model, in described first order power tube, include an enhancement mode field effect transistor D1, the resistance R4 of electric connection mutually, electric capacity C4 and resistance R5; The enhancement mode field effect transistor D2 and resistance R10 that are mutually electrically connected is included in the power tube of the described second level; Described resistance R4, electric capacity C4 form the feedback network of first order power tube.

Concrete, the inductance L 1 comprising an electric capacity C2 in described input coupling capacitance and be connected in series with electric capacity C2, also be electrically connected with the electric capacity C3 of a ground connection between this electric capacity C2 and inductance L 1, this electric capacity C2 one end and attenuator are electrically connected, and inductance L 1 one end and first order power tube are electrically connected.

Optionally, described attenuator can be a π type resistance attenuator.

Further, described π type resistance attenuator and a radio-frequency (RF) signal input end are electrically connected, and include resistance R1, the electric capacity C1 of electric connection, resistance R2 and resistance R3 in this π type resistance attenuator.

Moreover described output matching network circuit and a RF signal output are electrically connected, in this output matching network circuit, include the inductance L 2 be electrically connected successively and inductance L 3; Also be connected in parallel to electric capacity C15 and electric capacity C16 between described inductance L 2 and inductance L 3, inductance L 3 two ends are also connected in parallel to an electric capacity C14, are also connected in parallel to electric capacity C12 and electric capacity C13 between this inductance L 3 and RF signal output.

In the utility model, described blocking condenser comprises the electric capacity C7 of an electric capacity C8 and a ground connection.

Radio frequency power amplification module of the present utility model, it passes through the feedback network arranged in first order power amplifier, can improve stability during power tube work, avoid problem out of control in power tube work; Meanwhile, the setting of the circuit of its output matching network, can ensure that the output impedance of power amplifier module reaches 50 Ω, makes the input stage impedance balance of itself and rear class working cell, also ensures signal amplifying power and the job stability of power amplifier module self simultaneously.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the module frame chart of radio frequency power amplification module in the utility model;

Fig. 2 is the circuit diagram of a kind of specific embodiment of radio frequency power amplification module in the utility model.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

As Fig. 1, shown in 2, the utility model provides a kind of radio frequency power amplification module, it comprises: power module and the power tube be electrically connected with power module, described power supply comprises one first power supply 10 and second source 20, power tube comprises first order power tube 30 and second level power tube 40, described first order power tube 30 and second level power tube 40 are electrically connected with this first power supply 10 and second source 20 respectively, this first order power tube 30 one end is electrically connected with input coupling capacitance 50 and attenuator successively, second level power tube 40 one end is electrically connected with output matching network circuit 60, a blocking condenser 70 is also electrically connected with between this first order power tube 30 and second level power tube 40.Radio frequency power amplification module of the present utility model, its stability that can improve transistor can keep good radio-frequency performance again.

Wherein, electric capacity C6, the resistance R11 of electric connection, resistance R9, resistance R8, resistance R7, resistance R6 and electric capacity C5 is included in described first power supply 10; The electric capacity C17 of connection parallel with one another, electric capacity C10, electric capacity C11, inductance L 4 and electric capacity C9 is included in described second source 20.

In the utility model, in described first order power tube 30, include an enhancement mode field effect transistor D1, the resistance R4 of electric connection mutually, electric capacity C4 and resistance R5; The enhancement mode field effect transistor D2 and resistance R10 that are mutually electrically connected is included in described second level power tube 40; Described resistance R4, electric capacity C4 form the feedback network of first order power tube, and its Main Function is the stability for improving during power tube work, avoids problem out of control in power tube work.Described second level power tube 40, according to real work needs, does not add capacitance-resistance feedback network.

As a kind of specific embodiment of the present utility model, the inductance L 1 comprising an electric capacity C2 in described input coupling capacitance 50 and be connected in series with electric capacity C2, the electric capacity C3 of a ground connection is also electrically connected with between this electric capacity C2 and inductance L 1, this electric capacity C2 one end and attenuator are electrically connected, and inductance L 1 one end and first order power tube 30 are electrically connected.

As a kind of selectivity embodiment of the present utility model, described attenuator can be a π type resistance attenuator 80.Further, described π type resistance attenuator 80 and a radio-frequency (RF) signal input end RF-IN are electrically connected, and include resistance R1, the electric capacity C1 of electric connection, resistance R2 and resistance R3 in this π type resistance attenuator 80.

Moreover described output matching network circuit 60 and a RF signal output RF-OUT are electrically connected, and include the inductance L 2 and inductance L 3 that are electrically connected successively in this output matching network 60 circuit; Also be connected in parallel to electric capacity C15 and electric capacity C16 between described inductance L 2 and inductance L 3, inductance L 3 two ends are also connected in parallel to an electric capacity C14, are also connected in parallel to electric capacity C12 and electric capacity C13 between this inductance L 3 and RF signal output RF-OUT.

As a kind of specific embodiment of the present utility model, described blocking condenser 70 comprises the electric capacity C7 of an electric capacity C8 and a ground connection.

Radio frequency power amplification module of the present utility model is when specific works, first, the voltage required for work is provided to power amplifier module, VCC1 by bleeder circuit for first order power tube 30 and second level power tube 40 provide grid working power VGG, VCC2 by a filter circuit for power amplifier module provides VDD drain drives power supply, then, input signal is by π type resistance attenuator 80, improve the impedance matching of signal generating circuit and power amplifier module input stage, by input coupling capacitance 50, play an effect every straight-through friendship, leach the flip-flop in input signal, after improving the impedance matching with first order power tube 30 further by an inductance L 1 again, signal is sent into first order power tube 30 amplifying power signal, by blocking condenser 70, signal is sent into second level power tube 40 again to amplify, power signal after second level power tube 40 amplifies, pass out to output matching network circuit 60, then the signal matched is outputted to next complete machine working cell.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.

Claims

1. a radio frequency power amplification module, the power tube comprising power module and be electrically connected with power module, it is characterized in that, described power supply comprises one first power supply and second source, power tube comprises first order power tube and second level power tube, described first order power tube and second level power tube are electrically connected with this first power supply and second source respectively, this first order power tube one end is electrically connected with input coupling capacitance and attenuator successively, power tube one end, the second level is electrically connected with output matching network circuit, a blocking condenser is also electrically connected with between this first order power tube and second level power tube.

2. radio frequency power amplification module as claimed in claim 1, is characterized in that, include the electric capacity C6 of electric connection, resistance R11, resistance R9, resistance R8, resistance R7, resistance R6 and electric capacity C5 in described first power supply; The electric capacity C17 of connection parallel with one another, electric capacity C10, electric capacity C11, inductance L 4 and electric capacity C9 is included in described second source.

3. radio frequency power amplification module as claimed in claim 1, is characterized in that, includes an enhancement mode field effect transistor D1, the resistance R4 of electric connection mutually, electric capacity C4 and resistance R5 in described first order power tube; The enhancement mode field effect transistor D2 and resistance R10 that are mutually electrically connected is included in the power tube of the described second level; Described resistance R4, electric capacity C4 form the feedback network of first order power tube.

4. radio frequency power amplification module as claimed in claim 1, it is characterized in that, the inductance L 1 comprising an electric capacity C2 in described input coupling capacitance and be connected in series with electric capacity C2, the electric capacity C3 of a ground connection is also electrically connected with between this electric capacity C2 and inductance L 1, this electric capacity C2 one end and attenuator are electrically connected, and inductance L 1 one end and first order power tube are electrically connected.

5. radio frequency power amplification module as claimed in claim 1, it is characterized in that, described attenuator is a π type resistance attenuator.

6. radio frequency power amplification module as claimed in claim 5, it is characterized in that, described π type resistance attenuator and a radio-frequency (RF) signal input end are electrically connected, and include resistance R1, the electric capacity C1 of electric connection, resistance R2 and resistance R3 in this π type resistance attenuator.

7. radio frequency power amplification module as claimed in claim 1, it is characterized in that, described output matching network circuit and a RF signal output are electrically connected, and include the inductance L 2 be electrically connected successively and inductance L 3 in this output matching network circuit; Also be connected in parallel to electric capacity C15 and electric capacity C16 between described inductance L 2 and inductance L 3, inductance L 3 two ends are also connected in parallel to an electric capacity C14, are also connected in parallel to electric capacity C12 and electric capacity C13 between this inductance L 3 and RF signal output.

8. radio frequency power amplification module as claimed in claim 1, it is characterized in that, described blocking condenser comprises the electric capacity C7 of an electric capacity C8 and a ground connection.