High-efficiency high-harmonic-suppression high-power amplifier circuit with switching function

Abstract

The invention discloses a high-efficiency high-harmonic-suppression high-power amplifier circuit with a switching function. The high-efficiency high-harmonic-suppression high-power amplifier circuit comprises a radio frequency input port, a first amplification module, a second amplification module, a first bias unit, a second bias unit, an output matching network, a first radio frequency output port and a second radio frequency output port, the radio frequency input port is used for receiving a radio frequency input signal; the first amplification module is used for performing first-stage amplification on a radio frequency input signal to obtain a first-stage amplification signal; the second amplification module is used for performing second-stage amplification on the radio frequency input signal to obtain a second-stage amplification signal; the first radio frequency output port and the second radio frequency output port are used for outputting a second-stage amplification signal; and the first bias unit and the second bias unit are respectively connected with the first amplification module and the second amplification module and are used for supplying power to the first amplification module and the second amplification module. High power, high harmonic suppression and high efficiency can be realized, the problem of insufficient efficiency of an amplifier circuit is solved, and output channel selection is realized.

Description

Technical Field

[0001] The invention belongs to the field of microwave integrated circuits, and in particular relates to a high-efficiency, high-harmonic suppression, high-power amplifier circuit with a switching function. Background Art

[0002] High power and high efficiency are the core indicators of power amplifiers. Generally speaking, on the one hand, higher output power means larger transistor size, and larger size will lead to poor frequency characteristics; on the other hand, higher output power also means greater heat dissipation requirements, so higher efficiency is required. However, amplifiers in the prior art have the following problems: due to the increase in frequency, the amplifier efficiency decreases, and due to the increase in output power, the high-frequency efficiency of the amplifier further decreases.

[0003] The switching power amplifier chip requires the integration of a high-performance power amplifier and a single-pole double-throw switch. The traditional design method is to design the above two devices separately and then integrate them in a direct cascade manner. The cascade of microwave circuits needs to consider the problem of port impedance matching. If the port impedances of the two devices cannot be perfectly matched, it will cause energy loss such as signal reflection, which will seriously affect the working efficiency of the switching power amplifier. Summary of the invention

[0004] The purpose of the present invention is to provide a high-efficiency, high-harmonic suppression, high-power amplifier circuit with a switching function, which can solve the problem of insufficient efficiency of the amplifier circuit under high power in the prior art and realize output channel selection at the same time.

[0005] In order to achieve the above-mentioned object, one aspect of the present invention provides a high-efficiency, high-harmonic suppression, high-power amplifier circuit with a switching function, comprising a radio frequency input port, a first amplification module, a second amplification module, a first bias unit, a second bias unit, an output matching network, a first radio frequency output port, and a second radio frequency output port; The RF input port is used to receive an RF input signal; the first amplifying module is used to perform a first-stage amplification on the RF input signal to obtain a first-stage amplified signal; the second amplifying module is used to perform a second-stage amplification on the RF input signal to obtain a second-stage amplified signal; the first RF output port and the second RF output port are used to output the second-stage amplified signal; the first bias unit and the second bias unit are respectively connected to the first amplifying module and the second amplifying module, and are used to supply power to the first amplifying module and the second amplifying module; The second amplification module includes an amplification network and an output matching network, wherein the amplification network is used to perform a second-stage amplification on the RF input signal, and the output matching network connects the amplification network with the first RF output port and the second RF output port, and includes first to fourth switch tubes, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a thirty-fourth capacitor, a twenty-ninth inductor, a thirtieth inductor, a fifty-seventh inductor, and a fifty-eighth inductor; Wherein, the first end of the sixteenth capacitor is connected to the output end of the amplification network; the second end of the sixteenth capacitor is connected to the first end of the seventeenth capacitor; the second end of the seventeenth capacitor is grounded; the first end of the twenty-ninth inductor is connected to the second end of the sixteenth capacitor; the second end of the twenty-ninth inductor is connected to the first end of the eighteenth capacitor; the second end of the eighteenth capacitor is grounded; the first end of the eighteenth capacitor is connected to the first end of the thirtieth inductor; the second end of the thirtieth inductor is connected to the first RF output port; the gate of the first switch tube is connected to the first switch control bit; the source of the first switch tube is connected to the second end of the thirtieth inductor; the drain of the first switch tube is grounded; the gate of the second switch tube is connected to the first switch control bit; the second The source of the switching tube is connected to the first end of the thirtieth inductor; the drain of the second switching tube is grounded; the first end of the fifty-seventh inductor is connected to the second end of the sixteenth capacitor; the second end of the fifty-seventh inductor is connected to the first end of the thirty-fourth capacitor; the second end of the thirty-fourth capacitor is grounded; the first end of the thirty-fourth capacitor is connected to the first end of the fifty-eighth inductor; the second end of the fifty-eighth inductor is connected to the second RF output port; the gate of the third switching tube is connected to the second switch control bit; the source of the third switching tube is connected to the second end of the fifty-eighth inductor; the drain of the third switching tube is grounded; the gate of the fourth switching tube is connected to the second switch control bit; the source of the fourth switching tube is connected to the first end of the fifty-eighth inductor; the drain of the fourth switching tube is grounded.

[0006] The high-efficiency, high-harmonic-suppression, high-power amplifier circuit with a switching function of the above aspect of the present invention jointly designs the power amplifier and the switch, uses the switch as a part of the output network of the power amplifier, reduces the switch insertion loss and increases the power capacity, thereby improving the working efficiency of the switching power amplifier and solving the problem of insufficient efficiency of the amplifier circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work: Figure 1It is a structural block diagram of a high-efficiency, high-harmonic suppression, high-power amplifier circuit with a switching function according to an embodiment of the present invention; Figure 2 The present invention is a circuit diagram of a high-efficiency, high-harmonic suppression, high-power amplifier circuit with a switching function according to an embodiment of the present invention. DETAILED DESCRIPTION

[0008] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0009] The embodiments of the present invention provide a high-efficiency, high-harmonic suppression, high-power amplifier circuit with a switching function. Figure 1 It is a structural block diagram of a high-efficiency, high-harmonic suppression, high-power amplifier circuit with a switching function according to an embodiment of the present invention; Figure 2 The present invention is a circuit diagram of a high-efficiency, high-harmonic suppression, high-power amplifier circuit with a switching function according to an embodiment of the present invention.

[0010] like Figure 1 As shown, the amplifier circuit of the embodiment of the present invention includes: a radio frequency input port RFin, a first amplifying module 100, a second amplifying module 200, a first bias unit 101, a second bias unit 201, a first radio frequency output port RFout1 and a second radio frequency output port RFout2. The radio frequency input port RFin is used to receive a radio frequency input signal. The input end of the first amplifying module 100 is connected to the radio frequency input port RFin, and is used to perform a first-stage amplification on the radio frequency input signal to obtain a first-stage amplified signal; the input end of the second amplifying module 200 is connected to the output end of the first amplifying module 100, and is used to perform a second-stage amplification on the first-stage output signal to obtain a second-stage amplified signal; the first radio frequency output port RFout1 and the second radio frequency output port RFout2 are connected to the output end of the second amplifying module 200, and are used to output the second-stage amplified signal; the first bias unit 101 and the second bias unit 201 are respectively connected to the first amplifying module 100 and the second amplifying module 200, and are used to power the first amplifying module 100 and the second amplifying module 200. The matching circuit with a switch function of the second amplifying module 200 can effectively improve the efficiency characteristics of the high power amplifier.

[0011] The modules and units included in the amplifier circuit according to the embodiment of the present invention are described in detail below.

[0012] 1. First amplification module 100 The first amplifying module 100 is a conventional module. The first amplifying module 100 includes: a first amplifying unit M1, a second amplifying unit M2, a first inductor L1, a second inductor L2, a fourth inductor L4, a thirty-first inductor L31, a thirty-third inductor L33, a first capacitor C1, a second capacitor C2, a nineteenth capacitor C19, a twentieth capacitor C20, a first resistor R1, and a sixth resistor R6. Preferably, the first amplifying unit M1 and the second amplifying unit M2 are high electron mobility transistors.

[0013] Among them, the first end of the first inductor L1 is connected to the RF input port RFin; the first end of the first resistor R1 of the first amplification module 100 is connected to the first end of the third inductor L3 of the first bias unit 101; the fourth inductor L4 is connected to the first end of the fifth inductor L5 of the first bias unit 101; the first end of the sixth resistor R6 is connected to the first end of the thirty-second inductor L32 of the first bias unit 101; the thirty-third inductor L33 is connected to the first end of the thirty-fourth inductor L34 of the first bias unit 101.

[0014] 2. First bias unit 101 The first bias unit 101 is a conventional module. The first bias unit 101 provides a gate voltage and a drain voltage for the first amplifying unit M1 and the second amplifying unit M2 in the first amplifying module 100 through its gate power supply terminal VG1 and drain power supply terminal VD1. The first bias unit 101 includes a third inductor L3, a fifth inductor L5, a thirty-second inductor L32, a thirty-fourth inductor L34, a second resistor R2, a fifth resistor R5, a third capacitor C3, a ninth capacitor C9, a twenty-first capacitor C21, and a twenty-third capacitor C23.

[0015] Among them, the first end of the first resistor R1 of the first amplifying module 100 is connected to the first end of the third inductor L3; the fourth inductor L4 of the first amplifying module 100 is connected to the first end of the fifth inductor L5; the first end of the sixth resistor R6 of the first amplifying module 100 is connected to the first end of the thirty-second inductor L32; the thirty-third inductor L33 of the first amplifying module 100 is connected to the first end of the thirty-fourth inductor L34.

[0016] 3. The second amplification module 200 The second amplification module 200 includes an amplification network and an output matching network. The amplification network is used to perform a second-stage amplification on the RF input signal, and includes a third amplification unit M3, a fourth amplification unit M4, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a sixth inductor L6, a seventh inductor L7, an eighth inductor L8, and a ninth inductor L9. Preferably, the third amplification unit M3 and the fourth amplification unit M4 are high electron mobility transistors.

[0017] Among them, the first end of the fourth capacitor C4 is connected to the first end of the fourth inductor L4 of the first amplifying module 100 (the first output end of the first amplifying module 100); the second end of the fourth capacitor C4 is connected to the first end of the sixth inductor L6; the second end of the sixth inductor L6 is connected to the first end of the fifth capacitor C5; the second end of the fifth capacitor C5 is grounded; the second end of the seventh inductor L7 is connected to the first end of the fifth capacitor C5; the first end of the seventh inductor L7 is connected to the first end of the sixth capacitor C6; the second end of the sixth capacitor C6 is grounded; the first end of the seventh inductor L7 is connected to the first end of the tenth inductor L10 of the second biasing unit 201 (the gate power supply end VG2 of the second biasing unit 201); the first end of the sixth capacitor C6 is connected to the first end of the eighth inductor L8 and the first end of the ninth inductor L9; the second end of the eighth inductor L8 is connected to the gate of the third amplifying unit M3; the second end of the ninth inductor L9 is connected to the gate of the fourth amplifying unit M4.

[0018] The amplification network of the second amplification module 200 further includes a fifth amplification unit M5, a sixth amplification unit M6, an eleventh inductor L11, a twelfth inductor L12, a thirteenth inductor L13, a fourteenth inductor L14, a fifteenth inductor L15, a seventh capacitor C7, an eighth capacitor C8, an eleventh capacitor C11, a twenty-sixth capacitor, and a fourth resistor R4. Preferably, the fifth amplification unit M5 and the sixth amplification unit M6 are high electron mobility transistors.

[0019] The second end of the fourth capacitor C4 is connected to the first end of the eleventh inductor L11; the second end of the eleventh inductor L11 is connected to the first end of the seventh capacitor C7; the second end of the seventh capacitor C7 is grounded; the second end of the twelfth inductor L12 is connected to the first end of the seventh capacitor C7; the first end of the twelfth inductor L12 is connected to the first end of the eighth capacitor C8; the second end of the eighth capacitor C8 is grounded; the first end of the twelfth inductor L12 is connected to the first end of the fifteenth inductor L15; the second end of the fifteenth inductor L15 is connected to the fourth inductor L12; the second end of the twelfth inductor L12 is connected to the first end of the fifteenth inductor L15; the second end of the twelfth inductor L15 is connected to the fourth inductor L12; the second end of the twelfth inductor L12 is connected to the first end of the seventh capacitor C7; the first end of the twelfth inductor L12 is connected to the first end of the eighth capacitor C8; the second end of the eighth capacitor C8 is grounded; the first end of the twelfth inductor L12 is connected to the first end of the fifteenth inductor L15; the second end of the twelfth inductor L15 is connected to the fourth inductor L12; the second end of the twelfth inductor L15 is connected to the first end of the fifteenth inductor L15; the second end of the twelfth inductor L15 is connected to the fourth inductor L12; the second end of the twelfth inductor L12 is connected to the first end of the seventh capacitor C7; the first end of the twelfth inductor L12 is connected to the first end of the eighth capacitor C8; the The first end of the resistor R4 is connected; the second end of the fourth resistor R4 is connected to the first end of the eleventh capacitor C11; the second end of the eleventh capacitor C11 is grounded; the first end of the eleventh capacitor C11 is connected to the first end of the twenty-sixth capacitor C26; the second end of the twenty-sixth capacitor C26 is grounded; the first end of the eighth capacitor C8 is connected to the first end of the thirteenth inductor L13 and the first end of the fourteenth inductor L14; the second end of the thirteenth inductor L13 is connected to the gate of the fifth amplifying unit M5; the second end of the fourteenth inductor L14 is connected to the gate of the sixth amplifying unit M6.

[0020] The amplification network of the second amplification module 200 further includes a ninth amplification unit M9, a tenth amplification unit M10, a twenty-second capacitor C22, a twenty-seventh capacitor C27, a twenty-eighth capacitor C28, a thirty-fifth inductor L35, a thirty-eighth inductor L38, a thirty-ninth inductor L39, and a fifty-ninth inductor L59. Preferably, the ninth amplification unit M9 and the tenth amplification unit M10 are high electron mobility transistors.

[0021] The first end of the 22nd capacitor C22 is connected to the first end of the 33rd inductor L33 of the first amplifying module 100 (the second output end of the first amplifying module 100); the second end of the 22nd capacitor C22 is connected to the first end of the 35th inductor L35; the second end of the 35th inductor L35 is connected to the first end of the 27th capacitor C27; the second end of the 27th capacitor C27 is grounded; the second end of the 59th inductor L59 is connected to the first end of the 27th capacitor C27; the first end of the 59th inductor L59 is connected to the 28th capacitor C27; the second end of the 59th inductor L59 is connected to the first end of ... The first end of the container C28 is connected; the second end of the twenty-eighth capacitor C28 is grounded; the first end of the fifty-ninth inductor L59 is connected to the first end of the thirty-sixth inductor L36 of the second bias unit 201 (the gate power supply terminal VG2 of the second bias unit 201); the first end of the twenty-eighth capacitor C28 is connected to the first end of the thirty-eighth inductor L38 and the first end of the thirty-ninth inductor L39; the second end of the thirty-eighth inductor L38 is connected to the gate of the ninth amplifying unit M9; the second end of the thirty-ninth inductor L39 is connected to the gate of the tenth amplifying unit M10.

[0022] The amplification network of the second amplification module 200 further includes a seventh amplification unit M7, an eighth amplification unit M8, a twenty-fourth capacitor C24, a twenty-fifth capacitor C25, a twenty-sixth capacitor C26, a fortieth inductor L40, a forty-first inductor L41, a forty-second inductor L42, a forty-third inductor L43, and a seventh resistor R7. Preferably, the seventh amplification unit M7 and the eighth amplification unit M8 are high electron mobility transistors.

[0023] Wherein, the second end of the 22nd capacitor C22 is connected to the first end of the 39th inductor L39; the second end of the 39th inductor L39 is connected to the first end of the 24th capacitor C24; the second end of the 24th capacitor C24 is grounded; the second end of the 40th inductor L40 is connected to the first end of the 24th capacitor C24; the first end of the 40th inductor L40 is connected to the first end of the 25th capacitor C25; the second end of the 25th capacitor C25 is grounded; the first end of the 40th inductor L40 is connected to the first end of the 41st inductor L41; the second end of the 41st inductor L41 is connected to the first end of the 7th resistor R7; the second end of the 7th resistor R7 is connected to the first end of the 26th capacitor C26; the second end of the 26th capacitor C26 is grounded; the first end of the 11th capacitor C11 is connected to the first end of the 26th capacitor C26; The first end of the 25th capacitor C25 is connected to the first end of the 42nd inductor L42 and the first end of the 43rd inductor L43; the second end of the 42nd inductor L42 is connected to the gate of the seventh amplifying unit M7; the second end of the 43rd inductor L43 is connected to the gate of the eighth amplifying unit M8.

[0024] The amplifying network of the second amplifying module 200 further includes a sixteenth inductor L16, a seventeenth inductor L17, an eighteenth inductor L18, a twenty-second inductor L22, a twenty-third inductor L23, a twenty-fifth inductor L25, a twenty-sixth inductor L26, and a thirteenth capacitor C13.

[0025] The drain of the third amplifying unit M3 is connected to the first end of the sixteenth inductor L16; the second end of the sixteenth inductor L16 is connected to the first end of the eighteenth inductor L18; the drain of the fourth amplifying unit M4 is connected to the first end of the seventeenth inductor L17; the second end of the seventeenth inductor L17 is connected to the first end of the eighteenth inductor L18; the second end of the eighteenth inductor L18 is connected to the first end of the twenty-fourth inductor L24 of the second biasing unit 201 (the drain power supply end VD2 of the second biasing unit 201) The second end of the eighteenth inductor L18 is connected to the first end of the twenty-third inductor L23; the second end of the twenty-third inductor L23 is connected to the first end of the twenty-fifth inductor L25; the second end of the twenty-fifth inductor L25 is connected to the first end of the thirteenth capacitor C13; the second end of the thirteenth capacitor C13 is grounded; the second end of the twenty-third inductor L23 is connected to the first end of the twenty-second inductor L22; the second end of the twenty-third inductor L23 is connected to the first end of the twenty-sixth inductor L26.

[0026] The amplifying network of the second amplifying module 200 further includes a nineteenth inductor L19, a twentieth inductor L20, a twenty-first inductor L21, a twenty-second inductor L22, a twenty-eighth inductor L28, a fifty-fourth inductor L54, a fifteenth capacitor C15, and a thirtieth capacitor C30.

[0027] Among them, the drain of the fifth amplifying unit M5 is connected to the first end of the nineteenth inductor L19; the second end of the nineteenth inductor L19 is connected to the first end of the twenty-first inductor L21; the drain of the sixth amplifying unit M6 is connected to the first end of the twentieth inductor L20; the second end of the twentieth inductor L20 is connected to the first end of the twenty-first inductor L21; the second end of the twenty-first inductor L21 is connected to the second end of the twenty-second inductor L22; the second end of the twenty-first inductor L21 is connected to the first end of the twenty-eighth inductor L28; the second end of the twenty-eighth inductor L28 is connected to the first end of the fifteenth capacitor C15; the second end of the fifteenth capacitor C15 is grounded; the first end of the fifteenth capacitor C15 is connected to the first end of the thirtieth capacitor C30; the second end of the thirtieth capacitor C30 is grounded; the first end of the fifty-fourth inductor L54 is connected to the first end of the thirtieth capacitor C30.

[0028] The amplifying network of the second amplifying module 200 also includes a forty-fourth inductor L44, a forty-fifth inductor L45, a forty-eighth inductor L48, a fifty-first inductor L51, a fifty-second inductor L52, a fifty-third inductor L53, a fifty-fourth inductor L54, a fifty-fifth inductor L55, and a thirty-first capacitor C31.

[0029] Among them, the drain of the seventh amplifier unit M7 is connected to the first end of the forty-fourth inductor L44; the second end of the forty-fourth inductor L44 is connected to the first end of the forty-eighth inductor L48; the drain of the eighth amplifier unit M8 is connected to the first end of the forty-fifth inductor L45; the second end of the forty-fifth inductor L45 is connected to the first end of the forty-eighth inductor L48; the second end of the forty-eighth inductor L48 is connected to the second end of the fifty-fourth inductor L54; the second end of the forty-eighth inductor L48 is connected to the first end of the fifty-third inductor L53; the second end of the fifty-third inductor L53 is connected to the first end of the fifty-second inductor L52; the second end of the fifty-second inductor L52 is connected to the first end of the thirty-first capacitor C31; the second end of the thirty-first capacitor C31 is grounded; the first end of the fifty-first inductor L51 is connected to the second end of the fifty-third inductor L53; the second end of the fifty-third inductor L53 is connected to the first end of the fifty-fifth inductor L55.

[0030] The amplifying network of the second amplifying module 200 further includes a forty-sixth inductor L46, a forty-seventh inductor L47, a forty-ninth inductor L49, and a fifty-first inductor L51.

[0031] Among them, the drain of the ninth amplifying unit M9 is connected to the first end of the forty-sixth inductor L46; the second end of the forty-sixth inductor L46 is connected to the first end of the forty-ninth inductor L49; the drain of the tenth amplifying unit M10 is connected to the first end of the forty-seventh inductor L47; the second end of the forty-seventh inductor L47 is connected to the first end of the forty-ninth inductor L49; the second end of the forty-ninth inductor L49 is connected to the first end of the fiftieth inductor L50 of the second bias unit 201 (the drain power supply terminal VD2 of the second bias unit 201); the second end of the forty-ninth inductor L49 is connected to the second end of the fifty-first inductor L51.

[0032] The output matching network connects the amplifying network with the first RF output port RFout1 and the second RF output port RFout2, and includes first to fourth switching tubes SW1 to SW4, a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, a thirty-fourth capacitor C34, a twenty-ninth inductor L29, a thirtieth inductor L30, a fifty-seventh inductor L57, and a fifty-eighth inductor L58.

[0033] Wherein, the first end of the sixteenth capacitor C16 is connected to the first end of the fifty-sixth inductor L56 (the output end of the amplifying network); the second end of the sixteenth capacitor C16 is connected to the first end of the seventeenth capacitor C17; the second end of the seventeenth capacitor C17 is grounded; the first end of the twenty-ninth inductor L29 is connected to the second end of the sixteenth capacitor C16; the second end of the twenty-ninth inductor L29 is connected to the first end of the eighteenth capacitor C18; the second end of the eighteenth capacitor C18 is grounded; the first end of the eighteenth capacitor C18 is connected to the first end of the thirtieth inductor L30; the second end of the thirtieth inductor L30 is connected to the first RF output port RFout1; the gate of the first switch tube SW1 is connected to the first switch control bit VSW1; the source of the first switch tube SW1 is connected to the second end of the thirtieth inductor L30; the drain of the first switch tube SW1 is grounded; the gate of the second switch tube SW2 is connected to the first switch control bit VSW1; The source of the second switch tube SW2 is connected to the first end of the thirtieth inductor L30; the drain of the second switch tube SW2 is grounded; the first end of the fifty-seventh inductor L57 is connected to the second end of the sixteenth capacitor C16; the second end of the fifty-seventh inductor L57 is connected to the first end of the thirty-fourth capacitor C34; the second end of the thirty-fourth capacitor C34 is grounded; the first end of the thirty-fourth capacitor C34 is connected to the first end of the fifty-eighth inductor L58; the second end of the fifty-eighth inductor L58 is connected to the second RF output port RFout2; the gate of the third switch tube SW3 is connected to the second switch control bit VSW2; the source of the third switch tube SW3 is connected to the second end of the fifty-eighth inductor L58; the drain of the third switch tube SW3 is grounded; the gate of the fourth switch tube SW4 is connected to the second switch control bit VSW2; the source of the fourth switch tube SW4 is connected to the first end of the fifty-eighth inductor L58; the drain of the fourth switch tube SW4 is grounded.

[0034] The output matching network also includes a twenty-sixth inductor L26, a twenty-seventh inductor L27, a fifty-fifth inductor L55, a fifty-sixth inductor L56, a fourteenth capacitor C14, and a thirty-third capacitor C33.

[0035] Among them, the second end of the twenty-sixth inductor L26 is connected to the first end of the fourteenth capacitor C14; the second end of the fourteenth capacitor C14 is grounded; the second end of the twenty-sixth inductor L26 is connected to the first end of the twenty-seventh inductor L27; the second end of the twenty-seventh inductor L27 is connected to the first end of the fifty-sixth inductor L56; the second end of the fifty-sixth inductor L56 is connected to the first end of the thirty-third capacitor C33; the second end of the thirty-third capacitor C33 is grounded; the second end of the fifty-fifth inductor L55 is connected to the first end of the thirty-third capacitor C33.

[0036] 4. The second bias unit 201 The second bias unit 201 is a conventional module, and provides gate voltage and drain voltage for the third to tenth amplifying units M3 to M10 in the second amplifying module 200, and includes a thirty-sixth inductor L36, a fiftieth inductor L50, a tenth inductor L10, and a twenty-fourth inductor L24.

[0037] Among them, the first end of the fifty-ninth inductor L59 of the second amplifying module 200 is connected to the first end of the thirty-sixth inductor L36; the fifty-first inductor L51 of the second amplifying module 200 is connected to the first end of the fiftieth inductor L50; the first end of the seventh inductor L7 of the second amplifying module 200 is connected to the first end of the tenth inductor L10; the twenty-third inductor L23 of the second amplifying module 200 is connected to the first end of the twenty-fourth inductor L24.

[0038] Optionally, the gate power supply terminal VG1 of the first bias unit 101 and the gate power supply terminal VG2 of the second bias unit 201 can be combined into one gate power supply; the drain power supply terminal VD1 of the first bias unit 101 and the drain power supply terminal VD2 of the second bias unit 201 can be combined into one drain power supply.

[0039] The high-power amplifier circuit of the above-mentioned embodiment of the present invention can improve the circuit efficiency of the high-power amplifier under high-frequency conditions, and can solve the problem of decreased amplifier efficiency due to increased frequency in the prior art. Ultimately, while maintaining the high-power output unchanged, output channel selection can be achieved to solve the problem of insufficient high-frequency amplifier efficiency.

[0040] The second amplification module 200 is the core module of the high power amplifier circuit of the embodiment of the present invention. This module is the final stage of amplification, has the largest number of transistors, the largest matching network scale and complexity, and is the core factor restricting power efficiency and chip area.

[0041] The switching power amplifier chip requires the integration of a high-performance power amplifier and a single-pole double-throw switch. The traditional design method is to design the above two devices separately, and then integrate them in a direct cascade manner. The cascading of microwave circuits needs to consider the problem of port impedance matching. If the port impedances of the two devices cannot be perfectly matched, it will cause energy losses such as signal reflection, which seriously affects the working efficiency of the switching power amplifier. The present invention creatively integrates the output matching network of the power amplifier with the switching circuit, and uses the seventeenth capacitor C17, the twenty-ninth inductor L29, the fifty-seventh inductor L57, the eighteenth capacitor C18, and the thirty-fourth capacitor C34 as part of the output network of the power amplifier to participate in the matching, and as part of the switching circuit to realize the switching function, thereby reducing the switch insertion loss and increasing the output power, thereby improving the working efficiency.

[0042] The key to whether a power amplifier can achieve maximum power and maximum efficiency at the same time lies in whether the input and output of the final transistor can be matched to the optimal impedance. The present invention creatively introduces the eighteenth capacitor C18 and the thirty-fourth capacitor C34 as compensation capacitors to simultaneously match the final transistor to the position of the optimal output fundamental wave and harmonics, thereby obtaining the optimal efficiency. At the same time, the eighteenth capacitor C18 and the thirty-fourth capacitor C34 also serve as compensation capacitors to improve the parasitic capacitance Cgs of the switch tubes SW2 and SW3, making the switch tubes easier to match, and the bandwidth of the switch circuit can be appropriately widened and the insertion loss reduced.

[0043] In addition, the fourteenth capacitor C14 and the thirty-third capacitor C33 simulate the parasitic capacitance in the transmission line, reduce the length of the transmission line in the matching network, and thus reduce the area of ​​the matching network. The twenty-fifth inductor L25, the thirteenth capacitor C13 and the fifty-second inductor L52, and the thirty-first capacitor C31 are harmonic suppression networks, realizing the second harmonic suppression function.

[0044] The amplifier circuit of the above-mentioned embodiment of the present invention can realize output channel selection, high power and high efficiency, has strong engineering value, and can give full play to its advantage of high output power in the fields of radar, base station, electronic countermeasure and so on.

[0045] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-efficiency, high-harmonic suppression, high-power amplifier circuit with a switching function, characterized in that: It includes a radio frequency input port, a first amplification module, a second amplification module, a first bias unit, a second bias unit, an output matching network, a first radio frequency output port and a second radio frequency output port; The RF input port is used to receive a RF input signal; The first amplifying module is used to perform a first-stage amplification on the RF input signal to obtain a first-stage amplified signal; the second amplifying module is used to perform a second-stage amplification on the RF input signal to obtain a second-stage amplified signal; the first RF output port and the second RF output port are used to output the second-stage amplified signal; the first bias unit and the second bias unit are respectively connected to the first amplifying module and the second amplifying module, and are used to supply power to the first amplifying module and the second amplifying module; The second amplification module includes an amplification network and an output matching network, wherein the amplification network is used to perform a second-stage amplification on the RF input signal, and the output matching network connects the amplification network with the first RF output port and the second RF output port, and includes first to fourth switch tubes, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a thirty-fourth capacitor, a twenty-ninth inductor, a thirtieth inductor, a fifty-seventh inductor, and a fifty-eighth inductor; Wherein, the first end of the sixteenth capacitor is connected to the output end of the amplification network; the second end of the sixteenth capacitor is connected to the first end of the seventeenth capacitor; the second end of the seventeenth capacitor is grounded; the first end of the twenty-ninth inductor is connected to the second end of the sixteenth capacitor; the second end of the twenty-ninth inductor is connected to the first end of the eighteenth capacitor; the second end of the eighteenth capacitor is grounded; the first end of the eighteenth capacitor is connected to the first end of the thirtieth inductor; the second end of the thirtieth inductor is connected to the first RF output port; the gate of the first switch tube is connected to the first switch control bit; the source of the first switch tube is connected to the second end of the thirtieth inductor; the drain of the first switch tube is grounded; the gate of the second switch tube is connected to the first switch control bit; the second The source of the switching tube is connected to the first end of the thirtieth inductor; the drain of the second switching tube is grounded; the first end of the fifty-seventh inductor is connected to the second end of the sixteenth capacitor; the second end of the fifty-seventh inductor is connected to the first end of the thirty-fourth capacitor; the second end of the thirty-fourth capacitor is grounded; the first end of the thirty-fourth capacitor is connected to the first end of the fifty-eighth inductor; the second end of the fifty-eighth inductor is connected to the second RF output port; the gate of the third switching tube is connected to the second switch control bit; the source of the third switching tube is connected to the second end of the fifty-eighth inductor; the drain of the third switching tube is grounded; the gate of the fourth switching tube is connected to the second switch control bit; the source of the fourth switching tube is connected to the first end of the fifty-eighth inductor; the drain of the fourth switching tube is grounded.

2. The amplifier circuit according to claim 1, characterized in that The output matching network further includes a twenty-sixth inductor, a twenty-seventh inductor, a fifty-fifth inductor, a fifty-sixth inductor, a fourteenth capacitor, and a thirty-third capacitor; Among them, the second end of the twenty-sixth inductor is connected to the first end of the fourteenth capacitor; the second end of the fourteenth capacitor is grounded; the second end of the twenty-sixth inductor is connected to the first end of the twenty-seventh inductor; the second end of the twenty-seventh inductor is connected to the first end of the fifty-sixth inductor; the second end of the fifty-sixth inductor is connected to the first end of the thirty-third capacitor; the second end of the thirty-third capacitor is grounded; the second end of the fifty-fifth inductor is connected to the first end of the thirty-third capacitor.

3. The amplifier circuit according to claim 1 or 2, characterized in that: The amplifying network of the second amplifying module includes a third amplifying unit, a fourth amplifying unit, a fourth capacitor, a fifth capacitor, a sixth capacitor, a sixth inductor, a seventh inductor, an eighth inductor, and a ninth inductor; Among them, the first end of the fourth capacitor is connected to the first output end of the first amplification module; the second end of the fourth capacitor is connected to the first end of the sixth inductor; the second end of the sixth inductor is connected to the first end of the fifth capacitor; the second end of the fifth capacitor is grounded; the second end of the seventh inductor is connected to the first end of the fifth capacitor; the first end of the seventh inductor is connected to the first end of the sixth capacitor; the second end of the sixth capacitor is grounded; the first end of the seventh inductor is connected to the gate power supply end of the second bias unit; the first end of the sixth capacitor is connected to the first end of the eighth inductor and the first end of the ninth inductor; the second end of the eighth inductor is connected to the gate of the third amplification unit; the second end of the ninth inductor is connected to the gate of the fourth amplification unit.

4. The amplifier circuit according to claim 3, characterized in that The amplifying network of the second amplifying module further includes a fifth amplifying unit, a sixth amplifying unit, an eleventh inductor, a twelfth inductor, a thirteenth inductor, a fourteenth inductor, a fifteenth inductor, a seventh capacitor, an eighth capacitor, an eleventh capacitor, a twenty-sixth capacitor, and a fourth resistor; Among them, the second end of the fourth capacitor is connected to the first end of the eleventh inductor; the second end of the eleventh inductor is connected to the first end of the seventh capacitor; the second end of the seventh capacitor is grounded; the second end of the twelfth inductor is connected to the first end of the seventh capacitor; the first end of the twelfth inductor is connected to the first end of the eighth capacitor; the second end of the eighth capacitor is grounded; the first end of the twelfth inductor is connected to the first end of the fifteenth inductor; the second end of the fifteenth inductor is connected to the first end of the fourth resistor; the second end of the fourth resistor is connected to the first end of the eleventh capacitor; the second end of the eleventh capacitor is grounded; the first end of the eleventh capacitor is connected to the first end of the twenty-sixth capacitor; the second end of the twenty-sixth capacitor is grounded; the first end of the eighth capacitor is connected to the first end of the thirteenth inductor and the first end of the fourteenth inductor; the second end of the thirteenth inductor is connected to the gate of the fifth amplifying unit; the second end of the fourteenth inductor is connected to the gate of the sixth amplifying unit.

5. The amplifier circuit according to claim 4, characterized in that The amplifying network of the second amplifying module further includes a ninth amplifying unit, a tenth amplifying unit, a twenty-second capacitor, a twenty-seventh capacitor, a twenty-eighth capacitor, a thirty-fifth inductor, a thirty-eighth inductor, a thirty-ninth inductor, and a fifty-ninth inductor; Among them, the first end of the 22nd capacitor is connected to the second output end of the first amplifying module; the second end of the 22nd capacitor is connected to the first end of the 35th inductor; the second end of the 35th inductor is connected to the first end of the 27th capacitor; the second end of the 27th capacitor is grounded; the second end of the 59th inductor is connected to the first end of the 27th capacitor; the first end of the 59th inductor is connected to the first end of the 28th capacitor; the second end of the 28th capacitor is grounded; the first end of the 59th inductor is connected to the gate power supply end of the second biasing unit; the first end of the 28th capacitor is connected to the first end of the 38th inductor and the first end of the 39th inductor; the second end of the 38th inductor is connected to the gate of the ninth amplifying unit; the second end of the 39th inductor is connected to the gate of the tenth amplifying unit.

6. The amplifier circuit according to claim 5, characterized in that The amplifying network of the second amplifying module further includes a seventh amplifying unit, an eighth amplifying unit, a twenty-fourth capacitor, a twenty-fifth capacitor, a twenty-sixth capacitor, a fortieth inductor, a forty-first inductor, a forty-second inductor, a forty-third inductor, and a seventh resistor; Among them, the first end of the 24th capacitor is connected to the second end of the 39th inductor; the second end of the 24th capacitor is grounded; the second end of the 40th inductor is connected to the first end of the 24th capacitor; the first end of the 40th inductor is connected to the first end of the 25th capacitor; the second end of the 25th capacitor is grounded; the first end of the 40th inductor is connected to the first end of the 41st inductor; the second end of the 41st inductor is connected to the first end of the seventh resistor; the second end of the seventh resistor is connected to the first end of the 26th capacitor; the second end of the 26th capacitor is grounded; the first end of the 11th capacitor is connected to the first end of the 26th capacitor; the first end of the 25th capacitor is connected to the first end of the 42nd inductor and the first end of the 43rd inductor; the second end of the 42nd inductor is connected to the gate of the seventh amplifier unit; the second end of the 43rd inductor is connected to the gate of the eighth amplifier unit.

7. The amplifier circuit according to claim 6, characterized in that The amplifying network of the second amplifying module further includes a sixteenth inductor, a seventeenth inductor, an eighteenth inductor, a twenty-second inductor, a twenty-third inductor, a twenty-fifth inductor, a twenty-sixth inductor, and a thirteenth capacitor; Among them, the drain of the third amplifying unit is connected to the first end of the sixteenth inductor; the second end of the sixteenth inductor is connected to the first end of the eighteenth inductor; the drain of the fourth amplifying unit is connected to the first end of the seventeenth inductor; the second end of the seventeenth inductor is connected to the first end of the eighteenth inductor; the second end of the eighteenth inductor is connected to the drain power supply end of the second biasing unit; the second end of the eighteenth inductor is connected to the first end of the twenty-third inductor; the second end of the twenty-third inductor is connected to the first end of the twenty-fifth inductor; the second end of the twenty-fifth inductor is connected to the first end of the thirteenth capacitor; the second end of the thirteenth capacitor is grounded; the second end of the twenty-third inductor is connected to the first end of the twenty-second inductor; the second end of the twenty-third inductor is connected to the first end of the twenty-sixth inductor.

8. The amplifier circuit according to claim 7, characterized in that The amplifying network of the second amplifying module further includes a nineteenth inductor, a twentieth inductor, a twenty-first inductor, a twenty-second inductor, a twenty-eighth inductor, a fifty-fourth inductor, a fifteenth capacitor, and a thirtieth capacitor; Among them, the drain of the fifth amplifier unit is connected to the first end of the nineteenth inductor; the second end of the nineteenth inductor is connected to the first end of the twenty-first inductor; the drain of the sixth amplifier unit is connected to the first end of the twentieth inductor; the second end of the twentieth inductor is connected to the first end of the twenty-first inductor; the second end of the twenty-first inductor is connected to the second end of the twenty-second inductor; the second end of the twenty-first inductor is connected to the first end of the twenty-eighth inductor; the second end of the twenty-eighth inductor is connected to the first end of the fifteenth capacitor; the second end of the fifteenth capacitor is grounded; the first end of the fifteenth capacitor is connected to the first end of the thirtieth capacitor; the second end of the thirtieth capacitor is grounded; the first end of the fifty-fourth inductor is connected to the first end of the thirtieth capacitor.

9. The amplifier circuit according to claim 8, characterized in that The amplifying network of the second amplifying module further includes a forty-fourth inductor, a forty-fifth inductor, a forty-eighth inductor, a fifty-first inductor, a fifty-second inductor, a fifty-third inductor, a fifty-fourth inductor, a fifty-fifth inductor, and a thirty-first capacitor; Among them, the drain of the seventh amplifier unit is connected to the first end of the forty-fourth inductor; the second end of the forty-fourth inductor is connected to the first end of the forty-eighth inductor; the drain of the eighth amplifier unit is connected to the first end of the forty-fifth inductor; the second end of the forty-fifth inductor is connected to the first end of the forty-eighth inductor; the second end of the forty-eighth inductor is connected to the second end of the fifty-fourth inductor; the second end of the forty-eighth inductor is connected to the first end of the fifty-third inductor; the second end of the fifty-third inductor is connected to the first end of the fifty-second inductor; the second end of the fifty-second inductor is connected to the first end of the thirty-first capacitor; the second end of the thirty-first capacitor is grounded; the first end of the fifty-first inductor is connected to the second end of the fifty-third inductor; the second end of the fifty-third inductor is connected to the first end of the fifty-fifth inductor.

10. The amplifier circuit according to claim 9, characterized in that The amplifying network of the second amplifying module further includes a forty-sixth inductor, a forty-seventh inductor, a forty-ninth inductor, and a fifty-first inductor; Among them, the drain of the ninth amplifier unit is connected to the first end of the forty-sixth inductor; the second end of the forty-sixth inductor is connected to the first end of the forty-ninth inductor; the drain of the tenth amplifier unit is connected to the first end of the forty-seventh inductor; the second end of the forty-seventh inductor is connected to the first end of the forty-ninth inductor; the second end of the forty-ninth inductor is connected to the drain power supply end of the second bias unit; the second end of the forty-ninth inductor is connected to the second end of the fifty-first inductor.

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