A power divider and amplifier combined circuit with manual attenuation adjustment function

Abstract

The utility model discloses a kind of power divider and amplifier combined circuit with manual attenuation adjustment, including input, multiple power divider unit, multiple amplifier unit, manual attenuation unit and output end.Power divider evenly divides into N paths with input radio frequency signal;Each amplifier attenuates compensation corresponding branch;Manual attenuation unit can independently adjust the attenuation of each path signal in 0-20dB range, prevent signal too strong or too weak.The design integrates power division, amplification and attenuation function, compact structure, reduce system volume and cost, optimize impedance matching and anti-interference, can simultaneously provide stable signal for multiple receiving equipment, applicable to satellite communication, GPS navigation and various scenes, strong adaptability.

Description

Technical Field

[0001] This utility model belongs to the technical field of satellite signal transmission systems, specifically a power divider and amplifier combination circuit with manual attenuation adjustment function. Background Technology

[0002] In satellite signal transmission systems, power dividers are a core component, responsible for splitting a single input radio frequency signal into multiple parallel signals for simultaneous use by multiple receiving devices. However, signal loss is inevitable during transmission, and traditional power dividers lack signal compensation capabilities, resulting in significant signal attenuation after splitting, making it difficult to meet the signal quality requirements of receiving devices.

[0003] To address signal attenuation, existing technologies typically employ an additional series amplifier outside the power divider for compensation. However, this discrete design suffers from complex wiring and poor compatibility. Furthermore, existing technologies lack a dynamic signal strength adjustment mechanism. When input signal strength fluctuates or receiving equipment requirements change, the signal attenuation cannot be flexibly adjusted, easily leading to distortion due to excessively strong signals or reception failure due to excessively weak signals. This severely limits the flexibility of signal processing and the system's adaptability.

[0004] Furthermore, traditional combinational circuits often employ a fixed number of branches, resulting in poor scalability and inadequate impedance matching between modules, further impacting the stability and reliability of signal transmission. Therefore, there is an urgent need for an integrated, flexibly adjustable combinational circuit with excellent compensation capabilities to address the aforementioned problems in existing technologies. Utility Model Content

[0005] The purpose of this invention is to provide a power divider and amplifier combination circuit with manual attenuation adjustment function to solve the problems of insufficient signal attenuation compensation, lack of dynamic adjustment capability, and poor compatibility in satellite signal transmission in the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A power divider and amplifier combination circuit with manual attenuation adjustment includes an input terminal, a multi-channel power divider unit, multiple amplifier units, multiple manual attenuation units, and an output terminal. The input terminal is used to receive external radio frequency signals. The multi-channel power divider unit is connected after the input terminal and is used to divide the external radio frequency signal into N parallel signals. The multiple amplifier units are connected one-to-one with the N output terminals of the multi-channel power divider unit and are used to perform attenuation compensation for each signal. The multiple manual attenuation units are connected one-to-one with the multiple amplifier units and are used to adjust the attenuation of the corresponding signal. The output terminal is connected to the output terminals of the multiple manual attenuation units respectively and is used to output the processed N signals.

[0008] According to the above technical solution, the multi-channel power divider unit includes at least one main power divider chip, several capacitors, inductors and resistors; the main power divider chip can realize the distribution of N signals in a cascaded or parallel manner. When N=4, the multi-channel power divider unit includes the main power divider chip CX2 and auxiliary power divider chips CX1 and CX3. The three work together to divide the input signal into 4 parallel signals.

[0009] According to the above technical solution, the connection logic of the multi-channel power divider unit is as follows: the input terminal is connected to one end of the filter capacitor and the power supply inductor respectively; the other end of the power supply inductor is connected to the filter capacitor bank and the power supply respectively, and the other end of the filter capacitor bank is grounded; the other end of the filter capacitor is connected to the signal input pin of the main power divider chip, and the ground pin of the main power divider chip is grounded; the signal output pin of the main power divider chip is connected to the signal input pin of the auxiliary power divider chip through a capacitor and a resistor, and the signal output pin of the auxiliary power divider chip is connected to the corresponding amplifier unit through a capacitor.

[0010] According to the above technical solution, each amplifier unit includes an amplifier, a bias resistor, a filter capacitor, and a power supply inductor; the signal input pin of the amplifier is connected to the corresponding output terminal of the power divider unit through a capacitor and a resistor, and impedance matching is achieved through a grounding resistor; the grounding pin of the amplifier is grounded; the signal output pin of the amplifier is connected to one end of the power supply inductor and the filter capacitor respectively; the other end of the power supply inductor is connected to the power supply filter capacitor bank and the power supply respectively, and the other end of the power supply filter capacitor bank is grounded; the other end of the filter capacitor is connected to the corresponding manual attenuation unit through an output resistor, and load matching is achieved through a grounding resistor.

[0011] According to the above technical solution, it also includes an operational amplifier IC1. Multiple manual attenuation units are connected to the operational amplifier IC1. The operational amplifier IC1 is used to receive feedback signals from each manual attenuation unit and implement attenuation control logic.

[0012] According to the above technical solution, each manual attenuation unit includes an attenuator, several capacitors, resistors and inductors; the signal input pin of the attenuator is connected to the output resistor of the corresponding amplifier unit through a capacitor; the signal output pin of the attenuator is connected to the output terminal through a capacitor and a resistor, and impedance matching is achieved through a grounding resistor; the feedback pin of the attenuator outputs a feedback signal to the corresponding pin of the operational amplifier IC1 through an inductor and a resistor; the power supply pin of the attenuator is connected to the power supply through a resistor and a capacitor, and the other end of the capacitor is grounded.

[0013] According to the above technical solution, the pin connection logic of the operational amplifier IC1 is as follows: the feedback signal output terminal of each manual attenuation unit is connected to a signal input pin of the operational amplifier IC1, and signal coupling is achieved through a bridging resistor; the power supply pin of the operational amplifier IC1 is connected to the power supply and the filter capacitor respectively, and the other end of the filter capacitor is grounded; the ground pin of the operational amplifier IC1 is grounded.

[0014] According to the above technical solution, it also includes N signal input circuits, which are connected one-to-one with the N control pins of the operational amplifier IC1. Each signal input circuit includes a fixed resistor and a variable resistor connected in series. One end of the fixed resistor is connected to the power supply, and the other end of the variable resistor is grounded. The connection node between the fixed resistor and the variable resistor outputs a control signal to the operational amplifier IC1.

[0015] According to the above technical solution, the filter capacitors and power supply filter capacitors in the amplifier unit are high-frequency filter capacitors, used to suppress noise interference in the radio frequency signal; the power supply inductor is a high-frequency choke inductor, used to isolate the radio frequency signal from the power supply circuit.

[0016] According to the above technical solution, the attenuator in the manual attenuation unit is a programmable attenuator or a mechanically adjustable attenuator. The attenuation amount is adjusted by the control signal received by the operational amplifier IC1, so as to realize the independent attenuation adjustment of each signal.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In this invention, a multi-channel power divider unit achieves uniform signal splitting. Combined with a high-gain, low-noise amplifier unit, it effectively compensates for attenuation losses during signal transmission, ensuring consistent signal strength after splitting. Simultaneously, a manual attenuation unit allows for flexible signal attenuation adjustment within a 0-20dB range, preventing excessive signal distortion or failure due to insufficient signal strength, significantly improving signal transmission stability. Integrating the power divider, amplifier, manual attenuator, and control circuit into a single unit simplifies wiring, reduces system size and cost, and optimizes impedance matching between modules, reducing signal interference and enhancing circuit compatibility and reliability. The splitting design allows for simultaneous signal supply to multiple receiving devices and supports processing of satellite RF signals in different frequency bands, making it suitable for various scenarios such as satellite communication systems and GPS navigation systems, demonstrating strong adaptability.

[0019] The circuit in this invention allows for manual control of attenuation via a variable resistor in the signal input circuit. Combined with the logic control of the operational amplifier, it enables independent adjustment of each branch signal. The circuit is simple to operate, responds quickly, and meets the personalized signal requirements of different receiving devices. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the combined circuit of this utility model;

[0021] Figure 2 This is a circuit diagram of the multi-channel power divider unit of this utility model;

[0022] Figure 3 This is a circuit diagram of the first amplifier unit of this utility model;

[0023] Figure 4 This is a circuit diagram of the second amplifier unit of this utility model;

[0024] Figure 5 This is the circuit diagram of the third amplifier unit of this utility model;

[0025] Figure 6 This is the circuit diagram of the fourth amplifier unit of this utility model;

[0026] Figure 7 This is the circuit diagram of the first manual attenuation unit of this utility model;

[0027] Figure 8 This is the circuit diagram of the second manual attenuation unit of this utility model;

[0028] Figure 9 This is the circuit diagram of the third manual attenuation unit of this utility model;

[0029] Figure 10 This is the circuit diagram of the fourth manual attenuation unit of this utility model;

[0030] Figure 11 This is the circuit diagram of the operational amplifier IC1 in this application.

[0031] Figure 12 This is a circuit diagram of the four signal inputs of this utility model. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example 1

[0034] like Figure 1As shown, a power divider and amplifier combination circuit with manual attenuation adjustment function includes an input terminal, a multi-channel power divider unit, multiple amplifier units, multiple manual attenuation units, and an output terminal. The input terminal is used to receive external radio frequency signals. The multi-channel power divider unit is connected after the input terminal and is used to divide the external radio frequency signal into N parallel signals. The multiple amplifier units are connected one-to-one with the N output terminals of the multi-channel power divider unit and are used to perform attenuation compensation for each signal. The multiple manual attenuation units are connected one-to-one with the multiple amplifier units and are used to adjust the attenuation of the corresponding signal. The output terminal is connected to the output terminals of the multiple manual attenuation units respectively and is used to output the processed N signals.

[0035] In this invention, a multi-channel power divider unit achieves uniform signal splitting. Combined with a high-gain, low-noise amplifier unit, it effectively compensates for attenuation losses during signal transmission, ensuring consistent signal strength after splitting. Simultaneously, a manual attenuation unit allows for flexible signal attenuation adjustment within a 0-20dB range, preventing excessive signal distortion or failure due to insufficient signal strength, significantly improving signal transmission stability. Integrating the power divider, amplifier, manual attenuator, and control circuit into a single unit simplifies wiring, reduces system size and cost, and optimizes impedance matching between modules, reducing signal interference and enhancing circuit compatibility and reliability. The splitting design allows for simultaneous signal supply to multiple receiving devices and supports processing of satellite RF signals in different frequency bands, making it suitable for various scenarios such as satellite communication systems and GPS navigation systems, demonstrating strong adaptability.

[0036] The circuit in this invention allows for manual control of attenuation via a variable resistor in the signal input circuit. Combined with the logic control of the operational amplifier, it enables independent adjustment of each branch signal. The circuit is simple to operate, responds quickly, and meets the personalized signal requirements of different receiving devices.

[0037] Example 2

[0038] This embodiment is a further refinement of Embodiment 1. This embodiment provides a specific implementation of a 1-to-4 power divider and amplifier combination circuit.

[0039] A satellite signal 4-way power divider and amplifier combination circuit with manual attenuation adjustment function includes an input terminal, a multi-way power divider unit, 4 amplifier units, 4 manual attenuation units, an operational amplifier IC1, 4 signal input circuits, and an output terminal.

[0040] Input terminal: Used to receive external satellite radio frequency signals, providing a signal source for the entire circuit;

[0041] Multi-channel power divider unit: connected after the input terminal, including main power divider chip CX2, auxiliary power divider chips CX1 and CX3, as well as capacitors C9, C16, C19, C24, C25, C29, C32, C33, C40, C53, inductor L5, and resistors R18, R54, and R56; its core function is to divide the single RF signal received at the input terminal into four parallel signals to achieve uniform signal distribution;

[0042] Four amplifier units: namely the first to the fourth amplifier units, which are connected one-to-one with the four output terminals of the multi-channel power divider unit; each amplifier unit includes an amplifier (U1-U4), a bias resistor, a filter capacitor and a power supply inductor, which are used to compensate for the attenuation of the corresponding branch signal and improve the signal strength.

[0043] Four manual attenuation units: These are the first to fourth manual attenuation units, each corresponding to one of the four amplifier units. Each manual attenuation unit includes an attenuator (X1-X4), several capacitors, resistors, and inductors, used to manually adjust the attenuation of the corresponding signal, with an adjustment range of 0dB to 20dB.

[0044] Operational amplifier IC1: Model LM324, is connected to 4 manual attenuation units and 4 signal input circuits respectively. It is used to receive feedback signals from each manual attenuation unit and implement attenuation adjustment logic according to the control signals of the signal input circuits.

[0045] Four signal input circuits: each is connected to one of the four control pins of the operational amplifier IC1. Each signal input circuit includes a fixed resistor and an adjustable resistor, used to output an adjustable control signal to the operational amplifier IC1.

[0046] Output terminals: Includes 4 output interfaces (RF_OUT1-RF_OUT4), which are connected to the output terminals of 4 manual attenuation units respectively, and are used to output stable signals after splitting, amplification and attenuation adjustment.

[0047] like Figure 2 As shown, the multi-channel power divider unit includes chip CX1, chip CX2 and chip CX3; wherein, chip CX1, chip CX2 and chip CX3 divide the input external radio frequency signal into 4 parallel signals;

[0048] Capacitors C9, C16, C19, C24, C25, C29, C32, C33, C40, C53, inductor L5, resistors R18, R56, and R14.

[0049] The input terminal is connected to one end of capacitor C19 and one end of inductor L5 respectively. The other end of resistor L5 is connected to one end of capacitor C29, capacitor C32 and capacitor C33 respectively and the power supply. The other ends of capacitor C29, capacitor C32 and capacitor C33 are all grounded.

[0050] The other end of capacitor C19 is connected to pins 2, 5, and 6 of chip CX2, and pin 1 of chip CX2 is grounded; pin 4 of chip CX2 is connected to one end of resistor R18 and capacitor C16.

[0051] The other end of capacitor C16 is connected to pins 2, 5, and 6 of chip CX1, and pin 1 of chip CX1 is grounded.

[0052] Pin 4 of chip CX1 is connected to one end of capacitor C9 and resistor R14 respectively;

[0053] The other end of resistor R14 is connected to pin 3 of chip CX1 and one end of capacitor C25.

[0054] The other end of capacitor C9 and the other end of capacitor C25 are respectively connected to the amplifier unit;

[0055] Pin 3 of chip CX2 is connected to the other end of resistor R18 and one end of capacitor C24, and the other end of capacitor C24 is connected to pins 2, 5 and 6 of chip CX3.

[0056] Pin 4 of chip CX3 is connected to one end of resistor R56 and capacitor C40 respectively; pin 3 of chip CX3 is connected to the other end of resistor R56 and capacitor C53 respectively; the other ends of capacitor C40 and capacitor C53 are connected to the amplifier unit respectively.

[0057] Pin 1 of chip CX3 is grounded.

[0058] The amplifier unit includes a first amplifier unit, a second amplifier unit, a third amplifier unit, and a fourth amplifier unit; wherein, the first amplifier unit is connected to capacitor C9; the second amplifier unit is connected to capacitor C25; the third amplifier unit is connected to capacitor C40; and the fourth amplifier unit is connected to capacitor C53.

[0059] like Figure 3 As shown, the first amplifier unit includes amplifier U1, resistors R7, R8, R10, R11, R12, inductor L2, capacitors C1, C3, C10, and C11.

[0060] One end of resistors R10 and R7 is connected to capacitor C9; the other end of resistor R10 is grounded.

[0061] The other end of resistor R7 is connected to one end of capacitor C10 and one end of resistor R11; the other end of capacitor C10 is connected to pin 1 of amplifier U1; the other end of resistor R11 is grounded; pin 2 of amplifier U1 is grounded.

[0062] Pin 3 of amplifier U1 is connected to one end of inductor L2 and capacitor C11 respectively; the other end of inductor L2 is connected to one end of capacitor C1, capacitor C3 and power supply respectively; the other end of capacitor C11 is connected to one end of resistor R8 and resistor R12 respectively; the other end of resistor R8 is connected to manual attenuation unit.

[0063] The other ends of capacitors C1 and C3, as well as resistor R12, are all grounded.

[0064] like Figure 4 As shown, the second amplifier unit includes amplifier U2, resistors R24, R25, R27, R28, R29, inductor L4, capacitors C18, C20, C26, and C27.

[0065] One end of both resistor R27 and resistor R24 ​​is connected to capacitor C25; the other end of resistor R27 is grounded.

[0066] The other end of resistor R24 ​​is connected to one end of capacitor C26 and one end of resistor R28; the other end of capacitor C26 is connected to pin 1 of amplifier U2; the other end of resistor R28 is grounded; pin 2 of amplifier U2 is grounded.

[0067] Pin 3 of amplifier U2 is connected to one end of inductor L4 and capacitor C27 respectively; the other end of inductor L4 is connected to one end of capacitor C18, capacitor C20 and the power supply respectively; the other end of capacitor C27 is connected to one end of resistor R29 and resistor R25 respectively; the other end of resistor R25 is connected to the manual attenuation unit.

[0068] The other ends of capacitors C18 and C20, as well as resistor R29, are all grounded.

[0069] like Figure 5 As shown, the third amplifier unit includes amplifier U3, resistors R43, R44, R46, R47, R48, inductor L7, capacitors C35, C36, C41, and C42.

[0070] One end of resistors R43 and R46 is connected to capacitor C40; the other end of resistor C46 is grounded.

[0071] The other end of resistor R43 is connected to one end of capacitor C41 and one end of resistor R47; the other end of capacitor C26 is connected to pin 1 of amplifier U3; the other end of resistor R47 is grounded; pin 2 of amplifier U2 is grounded.

[0072] Pin 3 of amplifier U2 is connected to one end of inductor L7 and capacitor C42; the other end of inductor L7 is connected to one end of capacitors C35 and C36 and the power supply; the other end of capacitor C42 is connected to one end of resistors R44 and R48; the other end of resistor R48 is connected to the manual attenuation unit.

[0073] The other ends of capacitors C35 and C36, as well as resistor R48, are all grounded.

[0074] like Figure 6 As shown, the fourth amplifier unit includes amplifier U4, resistors R68, R69, R71, R72, R75, inductor L9, capacitors C48, C49, C54, and C55.

[0075] One end of resistors R71 and R68 is connected to capacitor C53; the other end of resistor R71 is grounded.

[0076] The other end of resistor R68 is connected to one end of capacitor C54 and one end of resistor R72; the other end of capacitor C54 is connected to pin 1 of amplifier U4; the other end of resistor R72 is grounded; pin 2 of amplifier U4 is grounded.

[0077] Pin 3 of amplifier U4 is connected to one end of inductor L9 and capacitor C55; the other end of inductor L9 is connected to one end of capacitors C48 and C49 and the power supply; the other end of capacitor C55 is connected to one end of resistors R69 and R75; the other end of resistor R69 is connected to the manual attenuation unit.

[0078] The other ends of capacitors C48 and C49, as well as resistor R75, are all grounded.

[0079] The manual attenuation unit includes an operational amplifier IC1, a first signal input circuit, a second signal input circuit, a third signal input circuit, a fourth signal input circuit, a first manual attenuation unit, a second manual attenuation unit, a third manual attenuation unit, and a fourth manual attenuation unit. The first signal input circuit, the second signal input circuit, the third signal input circuit, the fourth signal input circuit, the first manual attenuation unit, the second manual attenuation unit, the third manual attenuation unit, and the fourth manual attenuation unit are all connected to the operational amplifier IC1.

[0080] like Figure 7As shown, the first manual attenuation unit includes attenuator X1, capacitors C4, C5, C7, C12, C13, C15, C17, resistors R1, R2, R4, R5, R6, R9, R15, R16, R17, and inductor L1.

[0081] One end of capacitor C12 is connected to resistors R8 and R13 respectively, and the other end of capacitor C12 is connected to resistor R6 and pin 1 of attenuator X1 respectively; the other end of resistor R6 is connected to one end of capacitor C13; the other end of capacitor C13 is connected to attenuator X1 and one end of resistor R16 respectively, the other end of resistor R16 is connected to one end of resistor R15 and resistor R17 respectively, the other end of resistor R15 is connected to pin 4 of attenuator X1 and one end of capacitor C15 respectively; the other end of resistor R17 is connected to one end of capacitor C17 and the power supply respectively; the other end of capacitor C17 is grounded.

[0082] The other end of capacitor C15 is connected to one end of resistor R9. The other end of resistor R9 is connected to one end of capacitor C7 and pin 3 of attenuator X1. The other end of capacitor C7 is connected to one end of resistor R4 and one end of resistor R1. The other end of resistor R1 is connected to one end of capacitor C5 and one end of resistor R5. The other end of capacitor C5 is connected to the output terminal to output the processed signal. The other ends of resistors R5 and R4 are both grounded.

[0083] Pin 2 of attenuator X1 is connected to one end of resistor R2, the other end of resistor R2 is connected to one end of inductor L1, the other end of inductor L1 is connected to one end of capacitor C4, and the other end of capacitor C4 is grounded.

[0084] The other end of inductor L1 also outputs an OUT1 to pin 1 of operational amplifier IC1.

[0085] like Figure 8 As shown, the second manual attenuation unit includes attenuator X2, capacitors C21, C22, C23, C28, C30, C31, and C34, resistors R19, R20, R21, R22, R23, R26, R31, R32, and R33, and inductor L3;

[0086] One end of capacitor C28 is connected to resistors R25 and R30 respectively; the other end of capacitor C12 is connected to resistor R23 and pin 1 of attenuator X2 respectively; the other end of resistor R23 is connected to one end of capacitor C30; the other end of capacitor C30 is connected to attenuator X2 and one end of resistor R32 respectively; the other end of resistor R32 is connected to one end of resistors R31 and R33 respectively; the other end of resistor R31 is connected to pin 4 of attenuator X2 and one end of capacitor C31 respectively; the other end of resistor R33 is connected to one end of capacitor C34 and the power supply respectively; the other end of capacitor C34 is grounded.

[0087] The other end of capacitor C31 is connected to one end of resistor R26. The other end of resistor R26 is connected to one end of capacitor C23 and pin 3 of attenuator X2. The other end of capacitor C23 is connected to one end of resistor R21 and resistor R19. The other end of resistor R19 is connected to one end of capacitor C22 and resistor R22. The other end of capacitor C22 is connected to the output terminal to output the processed signal. The other ends of resistors R21 and R22 are both grounded.

[0088] Pin 2 of attenuator X2 is connected to one end of resistor R20, the other end of resistor R20 is connected to one end of inductor L3, the other end of inductor L3 is connected to one end of capacitor C21, and the other end of capacitor C21 is grounded.

[0089] The other end of inductor L3 also outputs OUT2 to pin 7 of operational amplifier IC1.

[0090] like Figure 9 As shown, the third manual attenuation unit includes attenuator X3, capacitors C37, C38, C39, C43, C45, C46, ​​C47, resistors R34, R35, R38, R39, R40, R45, R50, R53, R55, and inductor L6.

[0091] One end of capacitor C43 is connected to resistors R44 and R49 respectively; the other end of capacitor C43 is connected to resistor R40 and pin 1 of attenuator X3 respectively; the other end of resistor R40 is connected to one end of capacitor C45; the other end of capacitor C45 is connected to attenuator X3 and one end of resistor R53 respectively; the other end of resistor R53 is connected to one end of resistors R50 and R55 respectively; the other end of resistor R50 is connected to pin 4 of attenuator X3 and one end of capacitor C46 respectively; the other end of resistor R55 is connected to one end of capacitor C47 and the power supply respectively; the other end of capacitor C47 is grounded.

[0092] The other end of capacitor C46 is connected to one end of resistor R45. The other end of resistor R45 is connected to one end of capacitor C39 and pin 3 of attenuator X3. The other end of capacitor C39 is connected to one end of resistor R35 and one end of resistor R38. The other end of resistor R35 is connected to one end of capacitor C38 and one end of resistor R39. The other end of capacitor C38 is connected to the output terminal to output the processed signal. The other ends of resistors R39 and R38 are both grounded.

[0093] Pin 2 of attenuator X3 is connected to one end of resistor R34, the other end of resistor R34 is connected to one end of inductor L6, the other end of inductor L6 is connected to one end of capacitor C37, and the other end of capacitor C37 is grounded.

[0094] The other end of inductor L6 also outputs OUT3 to pin 8 of operational amplifier IC1.

[0095] like Figure 10 As shown, the fourth manual attenuation unit includes attenuator X4, capacitors C50, C51, C52, C56, C57, C58, and C59, resistors R60, R61, R64, R65, R66, R70, R78, R79, and R80, and inductor L8.

[0096] One end of capacitor C56 is connected to resistors R69 and R76 respectively, and the other end of capacitor C56 is connected to resistor R66 and pin 1 of attenuator X4 respectively; the other end of resistor R66 is connected to one end of capacitor C57; the other end of capacitor C57 is connected to attenuator X4 and one end of resistor R79 respectively, the other end of resistor R79 is connected to one end of resistor R78 and resistor R80 respectively, the other end of resistor R78 is connected to pin 4 of attenuator X4 and one end of capacitor C58 respectively; the other end of resistor R80 is connected to one end of capacitor C59 and the power supply respectively; the other end of capacitor C59 is grounded.

[0097] The other end of capacitor C58 is connected to one end of resistor R70. The other end of resistor R70 is connected to one end of capacitor C52 and pin 3 of attenuator X4. The other end of capacitor C52 is connected to one end of resistor R61 and one end of resistor R64. The other end of resistor R61 is connected to one end of capacitor C51 and one end of resistor R65. The other end of capacitor C51 is connected to the output terminal to output the processed signal. The other ends of resistors R65 and R64 are both grounded.

[0098] Pin 2 of attenuator X4 is connected to one end of resistor R60, the other end of resistor R60 is connected to one end of inductor L8, the other end of inductor L8 is connected to one end of capacitor C50, and the other end of capacitor C50 is grounded.

[0099] The other end of inductor L8 also outputs OUT4 to pin 14 of operational amplifier IC1.

[0100] like Figure 11 As shown, pin 1 of operational amplifier IC1 is connected to one end of resistor R36, and the other end of resistor R36 is connected to pin 2 of operational amplifier IC1; pin 3 of operational amplifier IC1 is connected to the first signal input circuit.

[0101] Pin 4 of operational amplifier IC1 is connected to the power supply and one end of capacitor C44, while the other end of capacitor C44 is grounded.

[0102] Pin 5 of operational amplifier IC1 is connected to the second signal input circuit; pin 6 of operational amplifier IC1 is connected to one end of resistor R41, and the other end of resistor R41 is connected to pin 7 of operational amplifier IC1.

[0103] Pin 8 of operational amplifier IC1 is connected to one end of resistor R42, and the other end of resistor R42 is connected to pin 9 of operational amplifier IC1; pin 10 of operational amplifier IC1 is connected to the third signal input circuit.

[0104] Pin 11 of operational amplifier IC1 is grounded;

[0105] Pin 12 of operational amplifier IC1 is connected to the fourth signal input circuit; pin 13 of operational amplifier IC1 is connected to one end of resistor R37, and the other end of resistor R37 is connected to pin 14 of operational amplifier IC1.

[0106] like Figure 12 As shown, the first signal input circuit includes resistors R51, R52, and R54; one end of resistor R51 is connected to the power supply; the other end of resistor R51 is connected to one end of resistors R52 and R54 respectively, and the other ends of resistors R52 and R54 are both grounded; resistor R54 is a variable resistor and is used to output the first input signal.

[0107] like Figure 12As shown, the second signal input circuit includes resistors R57, R58, and R59; one end of resistor R57 is connected to the power supply; the other end of resistor R57 is connected to one end of resistors R58 and R59 respectively, and the other ends of resistors R58 and R59 are grounded; resistor R59 is a variable resistor and is used to output the first input signal.

[0108] like Figure 12 As shown, the third signal input circuit includes resistors R62, R63, and R67; one end of resistor R62 is connected to the power supply; the other end of resistor R62 is connected to one end of resistors R63 and R67 respectively, and the other ends of resistors R63 and R67 are grounded; resistor R67 is a variable resistor and is used to output the first input signal.

[0109] like Figure 12 As shown, the fourth signal input circuit includes resistors R73, R74, and R77; one end of resistor R73 is connected to the power supply; the other end of resistor R73 is connected to one end of resistors R74 and R77 respectively, and the other ends of resistors R74 and R77 are grounded; resistor R77 is a variable resistor and is used to output the first input signal.

[0110] Example 3

[0111] This embodiment is a further refinement of Embodiment 2. This embodiment provides an implementation method for specific component selection, as detailed below:

[0112] Multi-channel power divider unit: The power divider chips CX1, CX2, and CX3 are all dual-channel power divider chips of model H2TCP-2-33W+. This chip supports wide-band signal splitting and has low insertion loss. The capacitors C9, C16, and C19 are all high-frequency ceramic capacitors. Among them, the filter capacitor is 102 (1nF) and the power supply filter capacitor is 10μF. The inductor L5 is a 1μH high-frequency choke inductor. The resistors R18 and R54 are metal film resistors with a precision of 1%.

[0113] Amplifier Unit: Amplifiers U1-U4 are all low-noise amplifiers of model ADL561 with a gain of 20dB, low noise figure and excellent compensation effect; resistors R7, R8 and other are metal film resistors, capacitors C1, C3 and other are high-frequency ceramic capacitors, and inductor L2 is a 1μH high-frequency choke inductor.

[0114] Manual attenuation unit: Attenuators X1-X4 are HM16 adjustable attenuators with an adjustment range of 0-20dB; resistors R1, R2, etc. are metal film resistors; capacitors C4, C5, etc. are high-frequency ceramic capacitors; and inductor L1 is a high-frequency choke inductor.

[0115] Control circuit: Operational amplifier IC1 is a quad operational amplifier of model LM324, which supports multi-channel signal processing; fixed resistors R51, R57, etc. in the signal input circuit are 100KΩ metal film resistors, R52, R58, etc. are 1KΩ metal film resistors, and variable resistors R54, R59, etc. are 10KΩ adjustable resistors.

[0116] The working principle of this utility model is as follows: Signal input and splitting: The external satellite radio frequency signal is input to the circuit through the input terminal. After being filtered by capacitor C19, it is input to pins 2, 5, and 6 of the main power divider chip CX2. Chip CX2 splits the signal into two paths: one path is input to the auxiliary power divider chip CX1 through capacitor C16, and the other path is input to the auxiliary power divider chip CX3 through capacitor C24. Chip CX1 splits the received signal into two paths again, and outputs them to the first and second amplifier units through capacitors C9 and C25 respectively. Chip CX3 also splits the signal into two paths, and outputs them to the third and fourth amplifier units through capacitors C40 and C53, ultimately realizing the distribution from one input signal to four parallel signals.

[0117] Signal amplification and compensation: Taking the first amplifier unit as an example, the shunt signal input by capacitor C9 is impedance matched by resistors R7 and R10, and then input to pin 1 of amplifier U1 through capacitor C10; the amplified signal output from pin 3 of amplifier U1 is filtered by capacitor C11 and then output to the first manual attenuation unit through resistor R8; inductor L2, capacitors C1 and C3 form a power supply filter circuit to provide stable power supply to amplifier U1, while isolating the RF signal from the power supply loop; the second to fourth amplifier units amplify and compensate the corresponding shunt signals using the same principle.

[0118] Manual attenuation adjustment: After receiving the signal output from amplifier U1, the first manual attenuation unit filters and matches it through capacitor C12 and resistor R6 before inputting it to attenuator X1. By adjusting the variable resistor R54 in the signal input circuit, the strength of the control signal input to operational amplifier IC1 can be changed. IC1 adjusts the attenuation of attenuator X1 through feedback terminal OUT1 according to the control signal. The adjusted signal is impedance matched through capacitor C7, resistors R1 and R4, and then output through capacitor C5. The second to fourth manual attenuation units achieve attenuation adjustment of the corresponding signal using the same principle, and each branch adjustment is performed independently without interference.

[0119] Control Logic: Pin 4 of operational amplifier IC1 is connected to a 5V power supply, which is filtered by capacitor C44 to provide a stable power supply to IC1; pin 11 is grounded; four signal input circuits provide four independent control signals to IC1. By adjusting the variable resistors in each circuit, the attenuation of the corresponding manual attenuation unit can be controlled respectively; IC1 receives feedback signals from each manual attenuation unit through pins 1, 7, 8, and 14, and combines them with the control signals to achieve precise adjustment of the attenuation.

[0120] After the circuit is assembled, connect a 5V DC power supply and input the satellite radio frequency signal through the input terminal. Use an oscilloscope to detect the signal strength of the four output terminals RF_OUT1-RF_OUT4 respectively, and adjust the variable resistors in each signal input circuit to make the signal strength of each output terminal reach the preset value. When the input signal strength fluctuates, the attenuation can be dynamically adjusted by adjusting the variable resistor of the corresponding manual attenuation unit to ensure the stability of the output signal.

[0121] This utility model achieves stable splitting, effective compensation, and flexible adjustment of satellite signals through integrated design. It has a compact structure, is easy to operate, and can be widely used in various satellite signal transmission scenarios, with significant practical value and promising prospects for promotion.

[0122] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0123] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A power divider and amplifier combination circuit with manual attenuation adjustment function, characterized in that: It includes an input terminal, a multi-channel power divider unit, multiple amplifier units, multiple manual attenuation units, and an output terminal; The input terminal is used to receive external radio frequency signals; After the multi-channel power divider unit is connected to the input terminal, it is used to divide the external radio frequency signal into N parallel signals; multiple amplifier units are connected one-to-one with the N output terminals of the multi-channel power divider unit to perform attenuation compensation for each signal. Multiple manual attenuation units are connected one-to-one with multiple amplifier units to adjust the attenuation of the corresponding signal; the output terminals are connected to the output terminals of multiple manual attenuation units to output the processed N signals.

2. The power divider and amplifier combination circuit with manual attenuation adjustment function according to claim 1, characterized in that: The multi-channel power divider unit includes at least one main power divider chip, several capacitors, inductors, and resistors; the main power divider chip can be cascaded or paralleled to achieve N-channel signal distribution.

3. The power divider and amplifier combination circuit with manual attenuation adjustment function according to claim 2, characterized in that: The connection logic of the multi-channel power divider unit is as follows: the input terminal is connected to one end of the filter capacitor and the power supply inductor respectively; the other end of the power supply inductor is connected to the filter capacitor bank and the power supply respectively, and the other end of the filter capacitor bank is grounded; the other end of the filter capacitor is connected to the signal input pin of the main power divider chip, and the ground pin of the main power divider chip is grounded; the signal output pin of the main power divider chip is connected to the signal input pin of the auxiliary power divider chip through a capacitor and a resistor, and the signal output pin of the auxiliary power divider chip is connected to the corresponding amplifier unit through a capacitor.

4. The power divider and amplifier combination circuit with manual attenuation adjustment function according to claim 3, characterized in that: Each amplifier unit includes an amplifier, a bias resistor, a filter capacitor, and a power supply inductor. The amplifier's signal input pins are connected to the corresponding output terminals of the power divider unit via capacitors and resistors, and impedance matching is achieved through a grounding resistor. The amplifier's grounding pin is grounded. The amplifier's signal output pins are connected to one end of the power supply inductor and the filter capacitor, respectively. The other end of the power supply inductor is connected to the power supply filter capacitor bank and the power supply, and the other end of the power supply filter capacitor bank is grounded. The other end of the filter capacitor is connected to the corresponding manual attenuation unit via an output resistor, and load matching is achieved through a grounding resistor.

5. A power divider and amplifier combination circuit with manual attenuation adjustment function according to claim 4, characterized in that: It also includes an operational amplifier IC1, to which multiple manual attenuation units are connected. The operational amplifier IC1 is used to receive feedback signals from each manual attenuation unit and implement attenuation control logic.

6. The power divider and amplifier combination circuit with manual attenuation adjustment function according to claim 5, characterized in that: Each manual attenuation unit includes an attenuator, several capacitors, resistors, and inductors; the signal input pin of the attenuator is connected to the output resistor of the corresponding amplifier unit through a capacitor; the signal output pin of the attenuator is connected to the output terminal through a capacitor and a resistor, and impedance matching is achieved through a grounding resistor; the feedback pin of the attenuator outputs a feedback signal to the corresponding pin of the operational amplifier IC1 through an inductor and a resistor; the power supply pin of the attenuator is connected to the power supply through a resistor and a capacitor, and the other end of the capacitor is grounded.

7. A power divider and amplifier combination circuit with manual attenuation adjustment function according to claim 5, characterized in that: The pin connection logic of operational amplifier IC1 is as follows: the feedback signal output terminal of each manual attenuation unit is connected to one signal input pin of operational amplifier IC1, and signal coupling is achieved through a bridging resistor; the power supply pin of operational amplifier IC1 is connected to the power supply and the filter capacitor respectively, and the other end of the filter capacitor is grounded; the ground pin of operational amplifier IC1 is grounded.

8. A power divider and amplifier combination circuit with manual attenuation adjustment function according to claim 7, characterized in that: It also includes N signal input circuits, which are connected one-to-one with the N control pins of the operational amplifier IC1. Each signal input circuit includes a fixed resistor and a variable resistor connected in series. One end of the fixed resistor is connected to the power supply, and the other end of the variable resistor is grounded. The connection node between the fixed resistor and the variable resistor outputs a control signal to the operational amplifier IC1.

9. A power divider and amplifier combination circuit with manual attenuation adjustment function according to claim 4, characterized in that: The filter capacitors and power supply filter capacitors in the amplifier unit are all high-frequency filter capacitors, used to suppress noise interference in the radio frequency signal; the power supply inductor is a high-frequency choke inductor, used to isolate the radio frequency signal from the power supply circuit.

10. A power divider and amplifier combination circuit with manual attenuation adjustment function according to claim 6, characterized in that: The attenuator in the manual attenuation unit is a programmable attenuator or a mechanically adjustable attenuator. The attenuation amount is adjusted by the control signal received by the operational amplifier IC1, so as to realize independent attenuation adjustment of each signal.

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