A high power low phase noise cascode amplifier

Abstract

This utility model discloses a high-power, low-phase-noise cascaded amplifier, including a low-noise amplifier PA5 disposed at the input end and a high-power amplifier PA6 disposed at the final stage; a first attenuation unit is disposed between the low-noise amplifier PA5 and the input end, and a second attenuation unit is disposed between the low-noise amplifier PA5 and the high-power amplifier PA6, and a connection circuit corresponding to the attenuation unit is also included; this solution cascades the low-noise amplifier and the high-power amplifier to form a cascaded amplification link that satisfies both low phase-noise performance and high power performance, thereby achieving better performance indicators while meeting performance requirements.

Description

Technical Field

[0001] This utility model relates to the field of low phase noise communication technology, and in particular to a high-power low phase noise cascaded amplifier. Background Technology

[0002] In communication equipment, especially high-power transmitters, it is desirable for the system phase noise to not deteriorate during communication. The phase noise requirements for the signal source are usually quite strict, and the demand for localization is becoming increasingly urgent. Therefore, meeting the low phase noise target under the background of localization is a great challenge.

[0003] Conventional domestically produced devices can only achieve -132dBm@100KHz when the module output power is 20dBm, but the industry currently has a higher requirement of -136dBm@100KHz, which is a huge gap. Therefore, it is necessary to bridge this gap. Existing technical solutions for domestically produced devices can meet the low phase noise amplification performance for small signals, but cannot meet it in high-power conditions; large-signal power transistors cannot meet the low phase noise requirements. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a high-power, low-phase-noise cascaded amplifier.

[0005] This utility model is achieved using the following technical solution:

[0006] A high-power, low-phase-noise cascaded amplifier includes a low-noise amplifier PA5 disposed at the input terminal and a high-power amplifier PA6 disposed at the final stage; a first attenuation unit is disposed between the low-noise amplifier PA5 and the input terminal, and a second attenuation unit is disposed between the low-noise amplifier PA5 and the high-power amplifier PA6; and a connection circuit corresponding to the attenuation unit is also included.

[0007] Specifically, the first attenuation unit and its corresponding connection circuit include a resistor R66 and a capacitor C104 connected in series at the input terminal, the capacitor C104 being connected to the low-noise amplifier PA5, and a grounded capacitor C106 being provided in the middle; a resistor R65 and a capacitor C112 are connected in parallel between the input terminal and the output terminal of the low-noise amplifier PA5.

[0008] Specifically, the low-noise amplifier PA5 also includes a parallel attenuation circuit I between its input and output terminals. The circuit includes a series resistor R55, capacitor module I, resistor module I, capacitor module II, and inductor L13. Capacitor module I includes capacitors C92, C95, and C97 connected in parallel, with one end of each capacitor connected to the circuit and the other end connected to and grounded. Resistor module I includes resistors R40, R42, R44, and R45 connected in parallel. Capacitor module II includes capacitors C94, C96, and C99 connected in parallel, with one end of each capacitor connected to the circuit and the other end connected to and grounded.

[0009] Specifically, an inductor L4 and a capacitor C23 are connected in series and in parallel between the capacitor module and the resistor module, with the other end of the capacitor C23 grounded; after the low-noise amplifier PA5 is connected in parallel with the attenuation circuit, a capacitor C102 is connected in series near the second attenuation unit and a grounded capacitor C107 is connected in parallel.

[0010] Specifically, the second attenuation unit and its corresponding connection circuit include capacitor module three, capacitor module four, capacitor module five, and attenuation circuit two, which are disposed between capacitor C102 and the input terminal of high-power amplifier PA6; capacitor module three consists of capacitor R67 and capacitor C113 connected in series, with one end of capacitor R67 connected to the circuit and the other end of capacitor C113 grounded; capacitor module four includes capacitors C100 and C101 connected in parallel, with one end of the two capacitors connected to the circuit and the other end connected and grounded; capacitor module five includes capacitors C110 and C111 connected in parallel, with one end of the two capacitors connected to the circuit and the other end connected and grounded.

[0011] Specifically, the second attenuation circuit includes an inductor L2, a resistor R37, a capacitor module six, and a resistor R47 connected in sequence; the other end of the inductor L2 is connected to a voltage source VG, and a resistor R36 is connected in parallel between the resistor R37 and the capacitor module six, with the other end of the resistor R36 grounded; the capacitor module six includes capacitors C25, C91, and C93 connected in parallel, with one end of the three capacitors connected to the circuit and the other end connected together and grounded; the resistor R47 is connected to the input terminal of the high-power amplifier PA6 in the circuit.

[0012] Specifically, the output terminal of the high-power amplifier PA6 is also provided with two parallel branches. Branch one includes capacitor C98, capacitor module seven, and diode D8. Capacitor C98 and diode D8 are connected in parallel to branch one, and their other ends are grounded. Capacitor module seven includes capacitors C27, C43, C55, C71, C72, C88, C89, and C90 connected in parallel. One end of each of the eight capacitors is connected to the circuit, and the other end is connected together and two grounding points are provided.

[0013] Specifically, the second branch includes capacitor module eight and capacitor C105. The capacitor module eight includes capacitors C108, C103 and C109 connected in parallel. One end of the three capacitors is connected to the loop, and the other end is connected to and grounded.

[0014] The beneficial effects of this utility model are as follows: This utility model cascades a low-noise amplifier and a high-power amplifier to form a cascaded amplification link that satisfies both low phase noise performance and high power performance, thereby achieving better performance indicators while meeting the requirements. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a circuit diagram of a high-power, low-phase-noise cascaded amplifier in an embodiment of this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] The following is in conjunction with the appendix Figure 1 The following describes some embodiments of the present invention in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0020] This invention proposes a high-power, low-phase-noise cascaded amplifier, specifically as follows: Figure 1 As shown, it includes a low-noise amplifier PA5 located at the input terminal and a high-power amplifier PA6 located at the final stage; a first attenuation unit is provided between the low-noise amplifier PA5 and the input terminal, and a second attenuation unit is provided between the low-noise amplifier PA5 and the high-power amplifier PA6; it also includes connection circuits corresponding to the attenuation units.

[0021] In a preferred embodiment, the first attenuation unit and its corresponding connection circuit include a resistor R66 and a capacitor C104 connected in series at the input terminal. The capacitor C104 is connected to the low-noise amplifier PA5, and a grounded capacitor C106 is provided in the middle. A resistor R65 and a capacitor C112 are connected in parallel between the input and output terminals of the low-noise amplifier PA5. An attenuation circuit one is also connected in parallel between the input and output terminals of the low-noise amplifier PA5. The circuit includes a resistor R55, a capacitor module one, a resistor module one, a capacitor module two, and an inductor L13 connected in series. The capacitor module one includes capacitors C92, C95, and C97 connected in parallel, with one end of each capacitor connected to the circuit and the other end connected and grounded. The resistor module one includes resistors R40, R42, R44, and R45 connected in parallel. The capacitor module two includes capacitors C94, C96, and C99 connected in parallel, with one end of each capacitor connected to the circuit and the other end connected and grounded.

[0022] In this embodiment, an inductor L4 and a capacitor C23 are connected in series in parallel between capacitor module one and resistor module one, and the other end of capacitor C23 is grounded; after the low noise amplifier PA5 is connected in parallel with attenuation circuit one, a capacitor C102 is connected in series near one end of the second attenuation unit and a grounded capacitor C107 is connected in parallel.

[0023] In a preferred embodiment, the second attenuation unit and its corresponding connection circuit include capacitor module three, capacitor module four, capacitor module five, and attenuation loop two disposed between capacitor C102 and the input terminal of high-power amplifier PA6; capacitor module three consists of capacitors R67 and C113 connected in series, with one end of capacitor R67 connected to the circuit and the other end of capacitor C113 grounded; capacitor module four includes capacitors C100 and C101 connected in parallel, with one end of the two capacitors connected to the loop and the other end connected and grounded; capacitor module five includes capacitors C110 and C111 connected in parallel, with one end of the two capacitors connected to the loop and the other end connected and grounded.

[0024] In a preferred embodiment, the second attenuation loop includes an inductor L2, a resistor R37, a capacitor module six, and a resistor R47 connected in sequence; the other end of the inductor L2 is connected to a voltage source VG, and a resistor R36 is connected in parallel between the resistor R37 and the capacitor module six, with the other end of the resistor R36 grounded; the capacitor module six includes capacitors C25, C91, and C93 connected in parallel, with one end of the three capacitors connected to the loop and the other end connected together and grounded; the resistor R47 is connected to the input terminal of the high-power amplifier PA6 in the circuit.

[0025] In a preferred embodiment, the output terminal of the high-power amplifier PA6 is further provided with two parallel branches. Branch one includes capacitor C98, capacitor module seven, and diode D8. Capacitor C98 and diode D8 are connected in parallel to branch one, and their other ends are grounded. Capacitor module seven includes capacitors C27, C43, C55, C71, C72, C88, C89, and C90 connected in parallel. One end of each of the eight capacitors is connected to the circuit, and the other end is connected to two grounding points. Branch two includes capacitor module eight and capacitor C105. Capacitor module eight includes capacitors C108, C103, and C109 connected in parallel. One end of each of the three capacitors is connected to the circuit, and the other end is connected to and grounded.

[0026] In this design, the first attenuation unit improves input standing wave ratio (VSWR) and provides 3dB attenuation; the low-noise amplifier PA5 provides low phase noise amplifier functionality with a noise figure of 1.0dB; the second attenuation unit improves interstage VSWR and provides 3dB attenuation; and the high-power amplifier PA6 provides high power capacity to meet high intermodulation requirements, and is a 20W amplifier with the following technical specifications:

[0027] Operating frequency: 3-30MHz;

[0028] Output power: 20dBm;

[0029] Gain: 40dB;

[0030] Phase noise: -140dBm@100KHz;

[0031] Operating voltage: +12V;

[0032] Current: 1A;

[0033] Size: 60-40-20mm;

[0034] RF input, RF output: SMA;

[0035] Operating temperature: -40℃~+105℃;

[0036] Application environments: base stations, ground-based, vehicle-mounted, shipborne, and airborne.

[0037] In one embodiment, such as Figure 1 As shown, the high-power, low-phase-noise cascaded amplifier proposed in this invention employs a low-noise amplifier at the input stage and a high-power amplifier in the final stage, cascading together to form a high-gain, high-power, low-phase-noise amplifier. The input stage uses a SIA3024T3 low-noise amplifier to reduce input signal noise, thereby minimizing signal noise degradation. The final stage uses a YP07272030 high-power amplifier for fallback. This solution addresses the high phase-noise requirement, achieving both high phase-noise and high-power requirements through domestic production.

[0038] For the foregoing embodiments, in order to simplify the description, they are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, because according to this application, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to this application.

[0039] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A high-power, low-phase-noise cascaded amplifier, characterized in that, It includes a low-noise amplifier PA5 located at the input terminal and a high-power amplifier PA6 located at the final stage; a first attenuation unit is provided between the low-noise amplifier PA5 and the input terminal, and a second attenuation unit is provided between the low-noise amplifier PA5 and the high-power amplifier PA6; it also includes connection circuits corresponding to the attenuation units.

2. The high-power, low-phase-noise cascaded amplifier as described in claim 1, characterized in that, The first attenuation unit and its corresponding connection circuit include a resistor R66 and a capacitor C104 connected in series at the input terminal, the capacitor C104 being connected to the low noise amplifier PA5, and a grounded capacitor C106 being provided in the middle; a resistor R65 and a capacitor C112 are connected in parallel between the input terminal and the output terminal of the low noise amplifier PA5.

3. A high-power, low-phase-noise cascaded amplifier as described in claim 2, characterized in that, The low-noise amplifier PA5 also has a parallel attenuation circuit I between its input and output terminals. The circuit includes a series resistor R55, capacitor module I, resistor module I, capacitor module II, and inductor L13. Capacitor module I includes capacitors C92, C95, and C97 connected in parallel, with one end of each capacitor connected to the circuit and the other end connected to ground. Resistor module I includes resistors R40, R42, R44, and R45 connected in parallel. Capacitor module II includes capacitors C94, C96, and C99 connected in parallel, with one end of each capacitor connected to the circuit and the other end connected to ground.

4. A high-power, low-phase-noise cascaded amplifier as described in claim 3, characterized in that, The capacitor module and the resistor module are connected in parallel and in series with an inductor L4 and a capacitor C23, and the other end of the capacitor C23 is grounded; the low noise amplifier PA5 is connected in parallel with the attenuation circuit, and a capacitor C102 is connected in series near the second attenuation unit and a grounded capacitor C107 is connected in parallel.

5. A high-power, low-phase-noise cascaded amplifier as described in claim 4, characterized in that, The second attenuation unit and its corresponding connection circuit include capacitor module three, capacitor module four, capacitor module five, and attenuation loop two, which are disposed between capacitor C102 and the input terminal of high-power amplifier PA6; capacitor module three consists of capacitor R67 and capacitor C113 connected in series, with one end of capacitor R67 connected to the circuit and the other end of capacitor C113 grounded; capacitor module four includes capacitors C100 and C101 connected in parallel, with one end of the two capacitors connected to the loop and the other end connected and grounded; capacitor module five includes capacitors C110 and C111 connected in parallel, with one end of the two capacitors connected to the loop and the other end connected and grounded.

6. A high-power, low-phase-noise cascaded amplifier as described in claim 5, characterized in that, The second attenuation circuit includes an inductor L2, a resistor R37, a capacitor module six, and a resistor R47 connected in sequence. The other end of the inductor L2 is connected to a voltage source VG. A resistor R36 is also connected in parallel between the resistor R37 and the capacitor module six, and the other end of the resistor R36 is grounded. The capacitor module six includes capacitors C25, C91, and C93 connected in parallel. One end of the three capacitors is connected to the circuit, and the other end is connected together and grounded. The resistor R47 is connected to the input terminal of the high-power amplifier PA6 in the circuit.

7. A high-power, low-phase-noise cascaded amplifier as described in claim 6, characterized in that, The output terminal of the high-power amplifier PA6 is also provided with two parallel branches. Branch one includes capacitor C98, capacitor module seven, and diode D8. Capacitor C98 and diode D8 are connected in parallel to branch one, and their other ends are grounded. Capacitor module seven includes capacitors C27, C43, C55, C71, C72, C88, C89, and C90 connected in parallel. One end of the eight capacitors is connected to the loop, and the other end is connected together and set with two grounding points.

8. A high-power, low-phase-noise cascaded amplifier as described in claim 7, characterized in that, Branch 2 includes capacitor module 8 and capacitor C105. Capacitor module 8 includes capacitors C108, C103 and C109 connected in parallel. One end of the three capacitors is connected to the loop, and the other end is connected to ground.

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