阅读说明：本技术 一种宽带频率可重构功率放大器 (Broadband frequency reconfigurable power amplifier ) 是由 杨涛 黄轲 于 2021-07-14 设计创作，主要内容包括：本发明提供一种宽带频率可重构功率放大器,包括依次连接的输入匹配网络模块、驱动级放大器、级间匹配网络模块、功率级放大器以及输出匹配网络模块；输入匹配网络模块包括两个依次串联的电容器C1、电容器C2,电感器L1的一端连接在电容器C1和电容器C2之间,另一端接地,电感器L2、电感器L3的一端分别通过开关S1、开关S2连接在电容器C1和电容器C2之间,另一端接地。通过多个电感器和分别将电感器进行连接的开关管共同构成了一个可重构电感器,通过控制不同开关管的通断,改变等效电感的值,从而实现频率的连续可重构,改变输入输出级间匹配的频率实现功率放大器的频带可重构。(The invention provides a broadband frequency reconfigurable power amplifier, which comprises an input matching network module, a drive stage amplifier, an interstage matching network module, a power stage amplifier and an output matching network module which are connected in sequence; the input matching network module comprises a capacitor C1 and a capacitor C2 which are sequentially connected in series, one end of an inductor L1 is connected between the capacitor C1 and the capacitor C2, the other end of the inductor L3526 is grounded, one ends of an inductor L2 and an inductor L3 are respectively connected between the capacitor C1 and the capacitor C2 through a switch S1 and a switch S2, and the other end of the inductor L2 and the other end of the inductor L3 are grounded. A reconfigurable inductor is formed by a plurality of inductors and switching tubes which respectively connect the inductors, and the value of equivalent inductance is changed by controlling the on-off of different switching tubes, so that the continuous reconfiguration of frequency is realized, and the frequency matched between an input stage and an output stage is changed to realize the frequency band reconfiguration of the power amplifier.)

1. A broadband frequency reconfigurable power amplifier is characterized by comprising an input matching network module, a drive stage amplifier, an interstage matching network module, a power stage amplifier and an output matching network module which are sequentially connected;

the input matching network module receives a radio frequency input signal, and the output matching network module outputs a radio frequency output signal;

the input matching network module comprises a capacitor C1 and a capacitor C2 which are sequentially connected in series, one end of an inductor L1 is connected between the capacitor C1 and the capacitor C2, the other end of the inductor L3526 is grounded, one ends of an inductor L2 and an inductor L3 are respectively connected between the capacitor C1 and the capacitor C2 through a switch S1 and a switch S2, and the other end of the inductor L2 and the other end of the inductor L3 are grounded;

the input matching network module further includes a first bias circuit having one end connected between the capacitor C2 and the driver stage amplifier.

2. The wideband frequency reconfigurable power amplifier according to claim 1, wherein the interstage matching network module comprises two capacitors C3 and C4 connected in series in sequence, one end of an inductor L7 is connected between the capacitor C3 and the capacitor C4, the other end is grounded, an inductor L8 is connected between the capacitor C3 and the capacitor C4 through a switch S3, and the other end is grounded;

the inter-stage matching network module further comprises a second bias circuit having one end connected between the capacitor C3 and the driver stage power amplifier;

the interstage matching network further comprises a capacitor C11 and a capacitor C21 which are sequentially connected in series, one end of an inductor L11 is connected between the capacitor C11 and the capacitor C21, the other end of the inductor L3526 is grounded, one ends of an inductor L21 and an inductor L31 are respectively connected between the capacitor C11 and the capacitor C21 through a switch S11 and a switch S21, and the other end of the inductor L3683 is grounded;

the second input module further comprises a third bias circuit having one end connected between the capacitor C21 and the power stage amplifier.

3. The wideband frequency reconfigurable power amplifier according to claim 2, wherein the output matching network module comprises two capacitors C31 and C41 connected in series in sequence, one end of an inductor L71 is connected between the capacitor C31 and the capacitor C41, the other end is grounded, an inductor L81 is connected between the capacitor C31 and the capacitor C41 through a switch S31, and the other end is grounded;

one end of the capacitor C7 is connected between the capacitor C31 and the capacitor C41 through the switch S4, and the other end is grounded;

the second output module further includes a fourth bias circuit having one end connected between the capacitor C31 and the power stage amplifier.

4. The wideband frequency reconfigurable power amplifier of claim 3, wherein the bias circuit comprises an inductor and a capacitor, one end of the capacitor is connected to the bias supply input of the inductor, and the other end is connected to ground.

5. The wideband frequency reconfigurable power amplifier according to claim 1, wherein the input matching network module further comprises a first stabilization circuit connected in series between a first bias circuit and a driver stage amplifier; the first stabilizing circuit includes a capacitor C5 and a resistor R1 connected in parallel.

6. The wideband frequency reconfigurable power amplifier according to claim 2, wherein the interstage matching network module further comprises a second stabilizing circuit connected in series between a third biasing circuit and the power stage amplifier; the second stabilizing circuit includes a capacitor C51 and a resistor R11 connected in parallel.

7. The wideband frequency reconfigurable power amplifier according to claim 2, wherein the interstage matching network module further comprises a first resonant circuit connected in series between the driver stage amplifier and the second biasing circuit; the first resonant circuit includes a capacitor C6 and an inductor L5 in parallel.

8. The wideband frequency reconfigurable power amplifier according to claim 3, wherein the output matching network module further comprises a second resonant circuit connected in series between the power stage amplifier and the fourth bias circuit; the second resonant circuit includes a capacitor C61 and an inductor L51 in parallel.

9. The wideband frequency reconfigurable power amplifier according to claim 1, characterized in that the switch S is a switching tube.

10. The wideband frequency reconfigurable power amplifier according to claim 1, wherein the driver stage amplifier is a transistor;

the power stage amplifier is a transistor.

Technical Field

The invention relates to the technical field of power amplifiers, in particular to a broadband frequency reconfigurable power amplifier.

Background

In the research of 5G communication systems, due to the shortage of spectrum resources, the 5G communication systems will face a more serious challenge of spectrum resource shortage than the 4G era. Meanwhile, the traditional microwave system has the defects of complex structure, large volume, single function and the like, so that the development requirement of a 5G communication system cannot be met. The development of rf power amplifiers is also constantly ongoing to meet various technical requirements. The radio frequency power amplifier also needs to work in a multi-band and multi-mode, the power consumption and the size of the wireless receiving and transmitting module can be further reduced, the development trend of the current technology is adapted, and the reconfigurable technology has great research significance as a key technology for realizing multiple functions.

In recent years, research on reconfigurable power amplifiers at home and abroad is gradually on the rise, most frequency reconfigurable power amplifiers are narrowband discrete reconfigurable in the current research at home and abroad, a multiband power amplifier is taken as a main part, most frequency reconfigurable power amplifiers are hybrid integrated circuits in the form, and continuous broadband reconfigurable MMIC (monolithic integrated circuit) power amplifiers do not appear yet.

Disclosure of Invention

In order to solve the above problems, the present application provides a wideband frequency reconfigurable power amplifier, which includes an input matching network module, a driver stage amplifier, an inter-stage matching network module, a power stage amplifier, and an output matching network module, which are connected in sequence;

the input matching network module receives a radio frequency input signal, and the output matching network module outputs a radio frequency output signal;

the input matching network module comprises a capacitor C1 and a capacitor C2 which are sequentially connected in series, one end of an inductor L1 is connected between the capacitor C1 and the capacitor C2, the other end of the inductor L3526 is grounded, one ends of an inductor L2 and an inductor L3 are respectively connected between the capacitor C1 and the capacitor C2 through a switch S1 and a switch S2, and the other end of the inductor L2 and the other end of the inductor L3 are grounded;

the input matching network module further includes a first bias circuit having one end connected between the capacitor C2 and the driver stage amplifier.

Further, the inter-stage matching network module comprises a capacitor C3 and a capacitor C4 which are connected in series in sequence, one end of an inductor L7 is connected between the capacitor C3 and the capacitor C4, the other end of the inductor L8 is grounded, the inductor L8 is connected between the capacitor C3 and the capacitor C4 through a switch S3, and the other end of the inductor L8 is grounded;

the inter-stage matching network module further comprises a second bias circuit having one end connected between the capacitor C3 and the driver stage power amplifier;

the interstage matching network further comprises a capacitor C11 and a capacitor C21 which are sequentially connected in series, one end of an inductor L11 is connected between the capacitor C11 and the capacitor C21, the other end of the inductor L3526 is grounded, one ends of an inductor L21 and an inductor L31 are respectively connected between the capacitor C11 and the capacitor C21 through a switch S11 and a switch S21, and the other end of the inductor L3683 is grounded;

the second input module further comprises a third bias circuit having one end connected between the capacitor C21 and the power stage amplifier.

Further, the output matching network module comprises a capacitor C31 and a capacitor C41 which are sequentially connected in series, one end of an inductor L71 is connected between the capacitor C31 and the capacitor C41, the other end of the inductor L81 is grounded, and the other end of the inductor L81 is connected between the capacitor C31 and the capacitor C41 through a switch S31, and the other end of the inductor L81 is grounded;

one end of the capacitor C7 is connected between the capacitor C31 and the capacitor C41 through the switch S4, and the other end is grounded;

the second output module further includes a fourth bias circuit having one end connected between the capacitor C31 and the power stage amplifier.

Further, the bias circuit includes an inductor and a capacitor, one end of the capacitor is connected to the bias power input terminal of the inductor, and the other end is grounded.

Further, the input matching network module further comprises a first stabilizing circuit connected in series between the first biasing circuit and the driver stage amplifier; the first stabilizing circuit includes a capacitor C5 and a resistor R1 connected in parallel.

Further, the interstage matching network module further comprises a second stabilizing circuit connected in series between the third biasing circuit and the power stage amplifier; the second stabilizing circuit includes a capacitor C51 and a resistor R11 connected in parallel.

Further, the interstage matching network module further comprises a first resonant circuit connected in series between the driver stage amplifier and the second bias circuit; the first resonant circuit includes a capacitor C6 and an inductor L5 in parallel.

Further, the output matching network module further comprises a second resonant circuit connected in series between the power stage amplifier and the fourth bias circuit; the second resonant circuit includes a capacitor C61 and an inductor L51 in parallel.

Further, the switch S is a switch tube.

Further, the driver stage amplifier is a transistor;

the power stage amplifier is a transistor.

The invention has the beneficial effects that:

the invention forms a reconfigurable inductor by a plurality of inductors and switch tubes which respectively connect the inductors, and changes the value of equivalent inductance by controlling the on-off of different switch tubes, thereby realizing the continuous reconfiguration of frequency, and changing the frequency matched between an input stage and an output stage to realize the frequency band reconfiguration of a power amplifier;

the structure of two-stage LC matching realizes wider bandwidth; the drive-stage amplifier and the power-stage amplifier are cascaded, so that high gain and wide frequency band of signals are realized;

and a monolithic circuit form is adopted, so that the structure is simple and the size is small.

Drawings

Fig. 1 is a block diagram of a wideband frequency reconfigurable power amplifier provided by the present invention;

fig. 2 is a schematic structural diagram of a wideband frequency reconfigurable power amplifier provided by the present invention;

fig. 3 is a schematic structural division diagram of a wideband frequency reconfigurable power amplifier provided by the present invention;

fig. 4 is a diagram of a power added efficiency simulation result of a wideband frequency reconfigurable power amplifier provided by the invention;

fig. 5 is a diagram of a power output power simulation result of the wideband frequency reconfigurable power amplifier provided by the invention.

The reference numbers illustrate:

the device comprises an input matching network module 1, a driving stage amplifier 2, an inter-stage matching network module 3, a power stage amplifier 4 and an output matching network module 5.

Detailed Description

The technical scheme of the invention is clearly and completely described in the following with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection can be mechanical connection, and also can be electrical connection and signal connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

as shown in fig. 1 to fig. 3, the wideband frequency reconfigurable power amplifier provided by this embodiment includes an input matching network module 1, a driver stage amplifier 2, an inter-stage matching network module 2, a power stage amplifier 4, and an output matching network module 5, which are connected in sequence;

the input matching network module 1 receives a radio frequency input signal and transmits an input matching network to the drive stage amplifier 2, the interstage matching network module is in signal connection with a signal output end of the drive stage amplifier 2 and transmits the interstage matching network to the power stage amplifier 4, and the output matching network module 5 is in signal connection with a signal output end of the power stage amplifier 4 and outputs a radio frequency output signal;

the input matching network module 1 comprises a capacitor C1 and a capacitor C2 which are sequentially connected in series, one end of an inductor L1 is connected between the capacitor C1 and the capacitor C2, the other end of the inductor L3526 is grounded, one ends of an inductor L2 and an inductor L3 are respectively connected between a capacitor C1 and the capacitor C2 through a switch S1 and a switch S2, and the other end of the inductor L3683 is grounded;

the input matching network module 1 further comprises a first bias circuit having one end connected between the capacitor C2 and the driver stage amplifier 2.

The switch S is a switch tube, in particular an MOSFET switch tube.

The driver-stage amplifier 2 is a transistor, a 4X125um gate-width transistor is adopted, the bias voltage is selected to be VG-1.8V, and VD-14V; the power stage amplifier 4 is a transistor, and a 6X125um gate width transistor is used, and the bias voltage VG is-1.8V and VD is 28V.

Preferably, a dc bias power supply is used as the control voltage for the switching tube and the bias circuit.

It should be noted that the invention provides a wideband frequency reconfigurable power amplifier, wherein L1, L2, L3 and switching tubes S1, S2 constitute a reconfigurable equivalent inductor, when S1, S2 are both off, the equivalent inductance value is L1, when S1 is on, S2 is off, the equivalent inductance value is L1// L2, when S1, S2 are both on, the equivalent inductance value is L1// L2// L3. The frequency of the input matching network can be reconfigured by changing the value of the equivalent inductance.

The invention can be realized by adopting a stable diligent.25 umGaN process. In addition, the single-chip circuit is adopted, so that the structure is simple, and the size is small.

The capacitor C1, the inductor L1, the capacitor C2 and the inductor L4 form a two-stage LC structure, so that the input matching network module 1 has wider bandwidth;

example 2:

the embodiment is implemented on the basis of embodiment 1, and specifically includes: the inter-stage matching network module 2 comprises a capacitor C3 and a capacitor C4 which are sequentially connected in series, one end of an inductor L7 is connected between the capacitor C3 and the capacitor C4, the other end of the inductor L3526 is grounded, an inductor L8 is connected between the capacitor C3 and the capacitor C4 through a switch S3, and the other end of the inductor L8 is grounded;

the inter-stage matching network module 2 further comprises a second bias circuit having one end connected between the capacitor C3 and the driver stage power amplifier;

the interstage matching network further comprises a capacitor C11 and a capacitor C21 which are sequentially connected in series, one end of an inductor L11 is connected between the capacitor C11 and the capacitor C21, the other end of the inductor L3526 is grounded, one ends of an inductor L21 and an inductor L31 are respectively connected between the capacitor C11 and the capacitor C21 through a switch S11 and a switch S21, and the other end of the inductor L3683 is grounded;

the second input module further comprises a third biasing circuit having one end connected between the capacitor C21 and the power stage amplifier 4.

The inter-stage matching network module 2 is connected with inductors L8, L11, L21 and L31 and switches S3, S11 and S21 to form a reconfigurable equivalent inductor, and the frequency of the inter-stage matching network is reconfigurable by changing the value of the equivalent inductor.

The inductor L6, the capacitor C3, the inductor L7 and the capacitor C4 form a two-stage LC structure, so that the interstage matching network module 2 has a wider bandwidth;

the capacitor C11, the inductor L11, the capacitor C21 and the inductor L41 form a two-stage LC structure, and a wider bandwidth of the network in the second input module is realized.

Example 3:

the embodiment is implemented on the basis of embodiment 2, and specifically includes: the output matching network module 5 comprises a capacitor C31 and a capacitor C41 which are sequentially connected in series, one end of an inductor L71 is connected between the capacitor C31 and the capacitor C41, the other end of the inductor L3526 is grounded, an inductor L81 is connected between the capacitor C31 and the capacitor C41 through a switch S31, and the other end of the inductor L81 is grounded;

one end of the capacitor C7 is connected between the capacitor C31 and the capacitor C41 through the switch S4, and the other end is grounded;

the second output module further comprises a fourth bias circuit having one end connected between the capacitor C31 and the power stage amplifier 4.

The output matching network module 5 is connected with the inductors L71 and L81 and the switch S31 to form a reconfigurable equivalent inductance, and the frequency of the output matching network is reconfigurable by changing the value of the equivalent inductance.

The inductor L61, the capacitor C31, the inductor L71 and the capacitor C41 form a two-stage LC structure, so that the interstage matching network module 2 has a wider bandwidth;

specifically, when the switches S of the driver stage amplifier 2 and the power stage amplifier 4 are all in the off state, the entire reconfigurable power amplifier operates at 2-4.5 GHz. When the switch S1 of the driver stage amplifier 2 and the switches S11, S31 of the power stage amplifier 4 are simultaneously on, the reconfigurable power amplifier operates at 4-7 GHz. When all the switches of the driving stage and the power stage are conducted, the reconfigurable power amplifier works at 6.5-10 GHz. The continuous adjustable frequency reconfiguration of the 2-10GHz broadband is realized.

Example 4:

the embodiment is implemented on the basis of embodiment 3, and specifically includes: the bias circuit comprises an inductor and a capacitor, wherein one end of the capacitor is connected to the bias power supply input end of the inductor, and the other end of the capacitor is grounded. That is, the first bias circuit, the second bias circuit, the third bias circuit, and the fourth bias circuit all have the same configuration, and the transistor is set to a desired potential by inputting a dc bias voltage to the other end of the bias circuit inductor.

Example 5:

the embodiment is implemented on the basis of embodiment 1, and specifically includes: the input matching network module 1 further comprises a first stabilizing circuit, which is connected in series between the first biasing circuit and the driver stage amplifier 2; the first stabilizing circuit includes a capacitor C5 and a resistor R1 connected in parallel. To improve the stability of the amplifier.

Example 6:

the embodiment is implemented on the basis of embodiment 2, and specifically includes: the inter-stage matching network module 2 further comprises a second stabilizing circuit connected in series between the third biasing circuit and the power stage amplifier 4; the second stabilizing circuit includes a capacitor C51 and a resistor R11 connected in parallel. To improve the stability of the amplifier.

Example 7:

the embodiment is implemented on the basis of embodiment 2, and specifically includes: the interstage matching network module 2 further comprises a first resonant circuit connected in series between the driver stage amplifier 2 and the second bias circuit; the first resonant circuit includes a capacitor C6 and an inductor L5 in parallel. The resonant circuit formed by the inductor L5 and the capacitor C6 in parallel has the function of harmonic control, and on the other hand, the resonant circuit can form an LC structure with the parasitic capacitance of the drain of the transistor, and has the optimization function on both efficiency and bandwidth.

Example 8:

the embodiment is implemented on the basis of embodiment 3, and specifically includes: the output matching network module 5 further comprises a second resonant circuit connected in series between the power stage amplifier 4 and the fourth bias circuit; the second resonant circuit includes a capacitor C61 and an inductor L51 in parallel. The resonant circuit formed by the inductor L51 and the capacitor C61 in parallel has the function of harmonic control, and on the other hand, the resonant circuit can form an LC structure with the parasitic capacitance of the drain of the transistor, and has the optimization function on both efficiency and bandwidth.

It should be noted that the invention can adopt ADS simulation software to perform design simulation on the layout of the reconfigurable power amplifier. Fig. 4 shows a simulation result of Power Added Efficiency (PAE), and the power amplifier can be switched in three frequency bands by the switching tube, which are final results of 2-4.5GHz, 4-7GHz, and 6.5-10GHz, respectively, and as shown in the figure, the efficiency of the full frequency band of 2-10GHz is basically achieved to be greater than 30%. 28% at a minimum at 2GHz and 43% at a peak at 2.6 GHz. The frequency band 1, the frequency band 2, and the frequency band 3 recorded in the figure correspond to the frequency bands 2-4.5GHz, 4-7GHz, and 6.5-10GHz in the present application, respectively.

Fig. 5 shows the simulation result of the output power (Pout), the input power (Pin) is 18dBm, and it can be seen from the simulation result that the power amplifier basically realizes the output power larger than 33dBm (2W) in the frequency band of 2-10 GHz. The frequency band 1, the frequency band 2, and the frequency band 3 recorded in the figure correspond to the frequency bands 2-4.5GHz, 4-7GHz, and 6.5-10GHz in the present application, respectively.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.