CN210431354U - High-power double-differential voltage transformation synthesis power amplifier - Google Patents
High-power double-differential voltage transformation synthesis power amplifier Download PDFInfo
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Abstract
The utility model discloses a synthetic power amplifier of high power double differential vary voltage, including input power distribution matching network, first double-stage feedback amplifier network, second double-stage feedback amplifier network, third double-stage feedback amplifier network, fourth double-stage feedback amplifier network and output four ways power synthesis matching network, the utility model discloses the core framework adopts first double-stage feedback amplifier network, second double-stage feedback amplifier network, third double-stage feedback amplifier network, fourth double-stage feedback amplifier network, utilizes differential amplifier at the good parasitic parameter rejection nature of microwave frequency channel, utilizes double-stage feedback amplifier at the high power of microwave section, high-gain characteristic simultaneously, combines together with the good power synthesis characteristic of distributed transformer network for whole power amplifier has obtained good high gain, high efficiency and high power output ability.
Description
Technical Field
The utility model relates to a field effect transistor radio frequency power amplifier and integrated circuit field, especially to the synthetic power amplifier of a high power double difference vary voltage that the terminal emission module of radio frequency microwave transceiver used.
Background
With the rapid development of wireless communication systems and rf microwave circuits, rf front-end transceivers are also developing in the direction of high performance, high integration, and low power consumption. Therefore, the rf and microwave power amplifiers of the transmitter are urgently required to have high output power, high gain, high efficiency, low cost and other performances in the market, and the integrated circuit is a key technology expected to meet the market demand.
However, when the integrated circuit process design is adopted to realize the chip circuit of the radio frequency and microwave power amplifier, the performance and the cost are limited to a certain extent, and the method mainly comprises the following steps:
(1) high power, high efficiency capability is limited: the traditional power amplifier adopts a multi-path parallel synthesis structure or a distributed structure, the synthesis efficiency of the two structures is limited, a part of power is lost in a synthesis network, and the high-power and high-efficiency capability is limited.
(2) Low power consumption, high gain amplification capability is limited: the power amplifier of the traditional single-ended common-source transistor is influenced by parasitic parameters of the transistor, has lower gain when working at high frequency, is greatly limited in power capability, and has higher difficulty in realizing low power consumption.
The circuit structures of common high-gain and high-power amplifiers are many, most typically, a multi-stage and multi-path synthesis single-ended power amplifier, but it is very difficult for a conventional multi-stage and multi-path synthesis single-ended power amplifier to simultaneously meet the requirements of various parameters, mainly because:
① the output impedance of the traditional multi-stage, multi-path synthesis single-ended power amplifier is low when it adopts multi-path parallel synthesis structure, therefore the output synthesis network needs to realize the impedance matching of high impedance transformation ratio, which often needs to sacrifice the gain of the amplifier and reduce the power, thus limiting the high power and high efficiency capability.
② in the traditional amplifier based on the active transformer synthesis network, the amplifier unit usually adopts a single-stage common-source amplifier or a Cascode amplifier, but the gains of the two amplifiers are relatively limited, and the output power is relatively limited by a single tube.
Therefore, the design difficulty of the high-gain and high-power amplifier based on the integrated circuit process is as follows: high power and high efficiency output difficulty is large; the traditional single transistor structure or the multiplex synthesis structure of Cascode transistors has many limitations in amplifiers based on active transformer synthesis networks.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a high power double differential vary voltage synthesis power amplifier is provided, the advantage of doublestage feedback amplification technique, differential amplifier technique, distributed transformer synthesis technique has at microwave frequency channel high power, high-gain and advantage such as with low costs.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a high-power double-differential transformation synthesis power amplifier comprises an input power distribution matching network, a first double-stage feedback amplification network, a second double-stage feedback amplification network, a third double-stage feedback amplification network, a fourth double-stage feedback amplification network and an output four-path power synthesis matching network.
The input end of the input power distribution matching network is the input end of the whole power amplifier, the first output end of the input power distribution matching network is connected with the input end of the first double-stage feedback amplification network, the second output end of the input power distribution matching network is connected with the input end of the fourth double-stage feedback amplification network, the third output end of the input power distribution matching network is connected with the input end of the second double-stage feedback amplification network, and the fourth output end of the input power distribution matching network is connected with the input end of the third double-stage feedback amplification network;
the output end of the first double-stage feedback amplification network is connected with the first input end of the output four-path power synthesis matching network; the output end of the second double-stage feedback amplification network is connected with the third input end of the output four-path power synthesis matching network; the output end of the third double-stage feedback amplification network is connected with the fourth input end of the output four-path power synthesis matching network; the output end of the fourth double-stage feedback amplification network is connected with the second input end of the output four-path power synthesis matching network;
and the output end of the output four-path power synthesis matching network is the output end of the whole power amplifier.
Furthermore, the input end of the input power distribution matching network is connected with the microstrip line TL1And microstrip line TL4Microstrip line TL1The other end of the microstrip line T is connected withL2Microstrip line TL2The other end of the microstrip line T is connected withL3And a ground capacitor C1Microstrip line TL3The other end of the transformer T is connected with1Primary coil of (2), transformer (T)1The non-homonymous end of the primary coil of (1) is grounded; microstrip line TL4The other end of the microstrip line T is connected withL5Microstrip line TL5The other end of the microstrip line T is connected withL6And a ground capacitor C2Microstrip line TL6The other end of the transformer T is connected with2Of the primary coil, transformer T2The dotted terminal of the primary coil of (2) is grounded; transformer T1The same-name end of the secondary coil is connected with the first output end of the input power distribution matching network, and a transformer T1The non-homonymous terminal of the secondary coil is connected with the second output terminal of the input power distribution matching network, and a transformer T2Secondary wire ofThe non-homonymous end of the coil is connected with the third output end of the input power distribution matching network, and the transformer T2The dotted terminal of the secondary coil of (a) is connected to the fourth output terminal of the input power distribution matching network.
The beneficial effects of the further scheme are as follows: the utility model discloses an input power distribution matching network except can realizing the power distribution of input radio frequency signal, can also carry out impedance match and phase adjustment to radio frequency input signal, guarantees differential signal's phase difference.
Furthermore, the input end of the Nth double-stage feedback amplification network is connected with a capacitor CmjCapacitor CmjIs connected with the microstrip line TL at the other endpjMicrostrip line TLpjIs connected with the microstrip line TL at the other endqjInductor LpjAnd a field effect transistor MpjOf the grid, microstrip line TLqjThe other end of the connecting rod is connected with a fan-shaped open-circuit branch line STpjAnd a bias voltage VgInductance LpjAnother end of the inductor L is connected with the inductor LqjAnd a ground capacitor CpjField effect transistor MpjThe source of (1) is grounded, and an inductor LqjThe other end of the capacitor C is connected with a capacitor CqjAnd microstrip line TLrjCapacitor CqjIs connected with the microstrip line TL at the other endsjAnd microstrip line TLtjMicrostrip line TLsjIs connected with the field effect transistor M at the other endpjDrain electrode of, microstrip line TLtjThe other end of the connecting rod is connected with a fan-shaped open-circuit branch line STqjAnd a bias voltage VdMicrostrip line TLrjIs connected with the field effect transistor M at the other endqjOf a field effect transistor MqjSource of (3) is grounded, MqjDrain connected microstrip line TLvjMicrostrip line TLvjAnd the other end of the first amplifier is connected with the output end of the second two-stage feedback amplifying network, wherein N is one, two, three and four, and j is 1,2, 3 and 4.
The beneficial effects of the further scheme are as follows: the utility model discloses a doublestage feedback amplifier network can show the gain and the power capacity of lift amplifier, adopts the feedback structure to improve impedance match characteristic between the stage simultaneously, extends the amplifier bandwidth.
Furthermore, the output four-path power synthesis matching network comprises sequentially coupled transformers T3、T4Transformer T3Of the secondary winding and transformer T4The non-homonymous terminal of the secondary coil passes through a capacitor Cout1Connection, transformer T4Secondary winding of the transformer has a center tap point connected with an inductor Lvd2Inductance Lvd2The other end of the capacitor is connected with a grounding capacitor Cvd2And a bias voltage Vd(ii) a Transformer T4Of the secondary winding and transformer T3The non-homonymous terminal of the secondary coil passes through a capacitor Cout2Connection, transformer T3Secondary winding of the transformer has a center tap point connected with an inductor Lvd1Inductance Lvd1The other end of the capacitor is connected with a grounding capacitor Cvd1And a bias voltage Vd(ii) a Simultaneous transformer T3The homonymous terminal of the primary coil is connected with the output terminal of the output four-path power synthesis matching network, and a transformer T4The same name end of the primary coil is connected with a transformer T3Of the primary coil, transformer T4The non-homonymous end of the primary coil of (1) is grounded; transformer T3The homonymous end and the non-homonymous end of the secondary coil are respectively connected with the first input end and the second input end of the output four-path power synthesis matching network, and the transformer T4The non-homonymous end and the homonymous end of the secondary coil are respectively connected with the third input end and the fourth input end of the output double-differential-to-single-ended synthesis network.
The beneficial effects of the further scheme are as follows: the utility model discloses an output four ways power synthesis matching network except can realizing four ways difference radio frequency signal's power synthesis, can also convert four ways difference signal into single-ended signal, the insertion loss of introducing is less, has ensured simultaneously the output and the efficiency of amplifier.
Drawings
Fig. 1 is a schematic block diagram of a power amplifier of the present invention;
fig. 2 is a circuit diagram of the power amplifier of the present invention.
Detailed Description
Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It is to be understood that the embodiments shown and described in the drawings are merely exemplary and are intended to illustrate the principles and spirit of the invention, not to limit the scope of the invention.
The embodiment of the utility model provides a high power double difference vary voltage synthesis power amplifier, including input power distribution matching network, first double-stage feedback amplifier network, second double-stage feedback amplifier network, third double-stage feedback amplifier network, fourth double-stage feedback amplifier network and output four ways power synthesis matching network.
As shown in fig. 1, an input end of the input power distribution matching network is an input end of the entire power amplifier, a first output end of the input power distribution matching network is connected to an input end of the first dual-stage feedback amplification network, a second output end of the input power distribution matching network is connected to an input end of the fourth dual-stage feedback amplification network, a third output end of the input power distribution matching network is connected to an input end of the second dual-stage feedback amplification network, and a fourth output end of the input power distribution matching network is connected to an input end of the third dual-stage feedback amplification network;
the output end of the first double-stage feedback amplification network is connected with the first input end of the output four-path power synthesis matching network; the output end of the second double-stage feedback amplification network is connected with the third input end of the output four-path power synthesis matching network; the output end of the third double-stage feedback amplification network is connected with the fourth input end of the output four-path power synthesis matching network; the output end of the fourth double-stage feedback amplification network is connected with the second input end of the output four-path power synthesis matching network;
the output end of the four-path power synthesis matching network is the output end of the whole power amplifier;
as shown in fig. 2, the input end of the input power distribution matching network is connected to the microstrip line TL1And microstrip line TL4Microstrip line TL1The other end of the microstrip line T is connected withL2Microstrip line TL2The other end of the microstrip line T is connected withL3And a ground capacitor C1Microstrip line TL3The other end of the transformer T is connected with1Primary coil of (2), transformer (T)1The non-homonymous end of the primary coil of (1) is grounded; microstrip line TL4The other end of the microstrip line T is connected withL5Microstrip line TL5The other end of the microstrip line T is connected withL6And a ground capacitor C2Microstrip line TL6The other end of the transformer T is connected with2Of the primary coil, transformer T2The dotted terminal of the primary coil of (2) is grounded; transformer T1The same-name end of the secondary coil is connected with the first output end of the input power distribution matching network, and a transformer T1The non-homonymous terminal of the secondary coil is connected with the second output terminal of the input power distribution matching network, and a transformer T2The non-homonymous terminal of the secondary coil is connected with the third output terminal of the input power distribution matching network, and a transformer T2The dotted terminal of the secondary coil of (a) is connected to the fourth output terminal of the input power distribution matching network.
The input end of the Nth double-stage feedback amplification network is connected with a capacitor CmjCapacitor CmjIs connected with the microstrip line TL at the other endpjMicrostrip line TLpjIs connected with the microstrip line TL at the other endqjInductor LpjAnd a field effect transistor MpjOf the grid, microstrip line TLqjThe other end of the connecting rod is connected with a fan-shaped open-circuit branch line STpjAnd a bias voltage VgInductance LpjAnother end of the inductor L is connected with the inductor LqjAnd a ground capacitor CpjField effect transistor MpjThe source of (1) is grounded, and an inductor LqjThe other end of the capacitor C is connected with a capacitor CqjAnd microstrip line TLrjCapacitor CqjIs connected with the microstrip line TL at the other endsjAnd microstrip line TLtjMicrostrip line TLsjIs connected with the field effect transistor M at the other endpjDrain electrode of, microstrip line TLtjThe other end of the connecting rod is connected with a fan-shaped open-circuit branch line STqjAnd a bias voltage VdMicrostrip line TLrjIs connected with the field effect transistor M at the other endqjOf a field effect transistor MqjSource of (3) is grounded, MqjDrain connected microstrip line TLvjMicrostrip line TLvjThe other end of the second amplifier is connected with the output end of the Nth double-stage feedback amplifying network, wherein N is one, two, three or four,j is 1,2, 3 and 4.
The output four-path power synthesis matching network comprises a transformer T coupled in sequence3、T4Transformer T3Of the secondary winding and transformer T4The non-homonymous terminal of the secondary coil passes through a capacitor Cout1Connection, transformer T4Secondary winding of the transformer has a center tap point connected with an inductor Lvd2Inductance Lvd2The other end of the capacitor is connected with a grounding capacitor Cvd2And a bias voltage Vd(ii) a Transformer T4Of the secondary winding and transformer T3The non-homonymous terminal of the secondary coil passes through a capacitor Cout2Connection, transformer T3Secondary winding of the transformer has a center tap point connected with an inductor Lvd1Inductance Lvd1The other end of the capacitor is connected with a grounding capacitor Cvd1And a bias voltage Vd(ii) a Simultaneous transformer T3The homonymous terminal of the primary coil is connected with the output terminal of the output four-path power synthesis matching network, and a transformer T4The same name end of the primary coil is connected with a transformer T3Of the primary coil, transformer T4The non-homonymous end of the primary coil of (1) is grounded; transformer T3The homonymous end and the non-homonymous end of the secondary coil are respectively connected with the first input end and the second input end of the output four-path power synthesis matching network, and the transformer T4The non-homonymous end and the homonymous end of the secondary coil are respectively connected with the third input end and the fourth input end of the output double-differential-to-single-ended synthesis network.
The following introduces the specific working principle and process of the present invention with reference to fig. 2:
the radio frequency input signal enters the circuit through the input end RFin, after impedance transformation matching is carried out through the input power distribution matching network, the radio frequency input signal simultaneously enters the input ends of the first to fourth bipolar feedback amplifying networks in the form of differential signals, after power amplification is carried out through the bipolar feedback amplifying networks, the radio frequency input signal is simultaneously output from the output ends of the first to fourth bipolar feedback amplifying networks in the form of differential signals, after the radio frequency input signal is subjected to power amplification through the bipolar feedback amplifying networks, the radio frequency input signal is synthesized into a single-ended signal through the output end RF from the four power synthesis matching networks, and the four signals areOUTAnd (6) outputting.
Based on above-mentioned circuit analysis, the utility model provides a high power double difference vary voltage synthesis power amplifier and the difference of the amplifier structure based on integrated circuit technology in the past lies in the bipolar feedback amplifier that the core framework adopted differential signal:
the bipolar feedback amplifier is different from the conventional single transistor in structure, and is not described herein;
bipolar feedback amplifiers differ from Cascode differential amplifiers in that: the stacked grid compensation capacitor of the common grid tube of the Cascode transistor is a capacitor with a large capacitance value and is used for realizing alternating current grounding of the grid, the bipolar feedback amplifier adopts a two-stage common source amplifier combined with a negative feedback structure, the gain of the circuit is greatly improved, the circuit structure is simple, and simulation debugging is easy.
In the whole high-power double-differential transformation synthesis power amplifier, the size of a transistor and the sizes of other resistors and capacitors are determined after the gain, bandwidth, output power and other indexes of the whole circuit are comprehensively considered, and through later-stage layout design and reasonable layout, the required indexes can be better realized, and the high-power output capacity, high-power gain and good input-output matching characteristic are realized.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (4)
1. A high-power double-differential transformation synthesis power amplifier is characterized by comprising an input power distribution matching network, a first double-stage feedback amplification network, a second double-stage feedback amplification network, a third double-stage feedback amplification network, a fourth double-stage feedback amplification network and an output four-path power synthesis matching network;
the input end of the input power distribution matching network is the input end of the whole power amplifier, the first output end of the input power distribution matching network is connected with the input end of the first double-stage feedback amplification network, the second output end of the input power distribution matching network is connected with the input end of the fourth double-stage feedback amplification network, the third output end of the input power distribution matching network is connected with the input end of the second double-stage feedback amplification network, and the fourth output end of the input power distribution matching network is connected with the input end of the third double-stage feedback amplification network;
the output end of the first double-stage feedback amplification network is connected with the first input end of the output four-path power synthesis matching network; the output end of the second double-stage feedback amplification network is connected with the third input end of the output four-path power synthesis matching network; the output end of the third double-stage feedback amplification network is connected with the fourth input end of the output four-path power synthesis matching network; the output end of the fourth double-stage feedback amplification network is connected with the second input end of the output four-path power synthesis matching network;
and the output end of the output four-path power synthesis matching network is the output end of the whole power amplifier.
2. The high-power double-differential transformation synthesis power amplifier according to claim 1, wherein the input end of the input power distribution matching network is connected with a microstrip line TL1And microstrip line TL4Microstrip line TL1The other end of the microstrip line T is connected withL2Microstrip line TL2The other end of the microstrip line T is connected withL3And a ground capacitor C1Microstrip line TL3The other end of the transformer T is connected with1Primary coil of (2), transformer (T)1The non-homonymous end of the primary coil of (1) is grounded; microstrip line TL4The other end of the microstrip line T is connected withL5Microstrip line TL5The other end of the microstrip line T is connected withL6And a ground capacitor C2Microstrip line TL6The other end of the transformer T is connected with2Primary coil of (2), transformer (T)2The non-homonymous end of the primary coil of (1) is grounded; transformer T1The same-name end of the secondary coil is connected with the first output end of the input power distribution matching network, and a transformer T1The non-homonymous terminal of the secondary coil is connected with the second output terminal of the input power distribution matching network and the transformerT2The non-homonymous terminal of the secondary coil is connected with the third output terminal of the input power distribution matching network, and a transformer T2The dotted terminal of the secondary coil of (a) is connected to the fourth output terminal of the input power distribution matching network.
3. The high power double differential transformer combining power amplifier of claim 1, wherein the input ends of the first, second, third and fourth double-stage feedback amplifying networks are connected with a capacitor CmjCapacitor CmjIs connected with the microstrip line TL at the other endpjMicrostrip line TLpjIs connected with the microstrip line TL at the other endqjInductor LpjAnd a field effect transistor MpjOf the grid, microstrip line TLqjThe other end of the connecting rod is connected with a fan-shaped open-circuit branch line STpjAnd a bias voltage VgInductance LpjAnother end of the inductor L is connected with the inductor LqjAnd a ground capacitor CpjField effect transistor MpjThe source of (1) is grounded, and an inductor LqjThe other end of the capacitor C is connected with a capacitor CqjAnd microstrip line TLrjCapacitor CqjIs connected with the microstrip line TL at the other endsjAnd microstrip line TLtjMicrostrip line TLsjIs connected with the field effect transistor M at the other endpjDrain electrode of, microstrip line TLtjThe other end of the connecting rod is connected with a fan-shaped open-circuit branch line STqjAnd a bias voltage VdMicrostrip line TLrjIs connected with the field effect transistor M at the other endqjOf a field effect transistor MqjSource of (3) is grounded, MqjDrain connected microstrip line TLvjMicrostrip line TLvjThe other end of the first double-stage feedback amplifying network, the second double-stage feedback amplifying network, the third double-stage feedback amplifying network and the fourth double-stage feedback amplifying network, wherein j is 1,2, 3 and 4.
4. The high power double differential transformer synthesis power amplifier of claim 1, wherein the output four-way power synthesis matching network comprises sequential couplingCombined transformer T3、T4Transformer T3Of the secondary winding and transformer T4The non-homonymous terminal of the secondary coil passes through a capacitor Cout1Connection, transformer T4Secondary winding of the transformer has a center tap point connected with an inductor Lvd2Inductance Lvd2The other end of the capacitor is connected with a grounding capacitor Cvd2And a bias voltage Vd(ii) a Transformer T4Of the secondary winding and transformer T3The non-homonymous terminal of the secondary coil passes through a capacitor Cout2Connection, transformer T3Secondary winding of the transformer has a center tap point connected with an inductor Lvd1Inductance Lvd1The other end of the capacitor is connected with a grounding capacitor Cvd1And a bias voltage Vd(ii) a Simultaneous transformer T3The homonymous terminal of the primary coil is connected with the output terminal of the output four-path power synthesis matching network, and a transformer T4The same name end of the primary coil is connected with a transformer T3Of the primary coil, transformer T4The non-homonymous end of the primary coil of (1) is grounded; transformer T3The homonymous end and the non-homonymous end of the secondary coil are respectively connected with the first input end and the second input end of the output four-path power synthesis matching network, and the transformer T4The non-homonymous end and the homonymous end of the secondary coil are respectively connected with the third input end and the fourth input end of the output four-path power synthesis matching network.
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