A broadband high-power combiner

Abstract

The application relates to a broadband high-power synthesizer which comprises a transformer printed circuit board, a first transformer, a second transformer, a third transformer, a signal output interface and an impedance transformer are arranged on the printed circuit board respectively; the first transformer comprises a first signal input interface for receiving a first signal and a second signal input interface for receiving a second signal; the second transformer comprises a third signal input interface for receiving a third signal and a fourth signal input interface for receiving a fourth signal; the third transformer comprises an input end for receiving the output of the first transformer and the output of the second transformer; the input end of the impedance transformer is connected with the output end of the third transformer; the output end of the impedance transformer is connected with the signal output interface; the transmission lines of the first transformer, the second transformer, the third transformer and the impedance transformer are connected by radio frequency transmission lines. The application has the effect of matching the input end and the output end of the synthesizer.

Description

Technical Field

[0001] This application relates to the field of synthesizers, and in particular to a broadband high-power synthesizer. Background Technology

[0002] Wideband high-power combiners play a crucial role in fields such as power sources and RF power supplies. With the continuous development of electronic technology, the performance requirements for combiners are also increasing, such as wider operating frequency ranges, more stable impedance, and higher combining efficiency. Improvements in the performance of wideband high-power combiners can significantly optimize the operation of related equipment, driving the entire industry towards a higher level of development.

[0003] Traditional broadband high-power synthesizers based on in-phase transmission line transformer synthesis technology generally use in-phase transmission line transformer synthesis technology. However, in practical applications, this traditional technology often causes high-frequency signals to be reflected at impedance abrupt changes due to the inconsistency between the characteristic impedance of the transmission line and the actual impedance of the synthesizer's input or output terminals. This results in energy loss and signal distortion, and impedance mismatch between the synthesizer's input and output terminals.

[0004] Therefore, how to achieve impedance matching between the input and output terminals of a synthesizer has become an urgent problem to be solved in this field. Utility Model Content

[0005] To achieve impedance matching between the input and output terminals of the synthesizer, this application provides a broadband high-power synthesizer.

[0006] The broadband high-power combiner provided in this application adopts the following technical solution: A broadband high-power combiner includes a transformer printed circuit board. The circuit board is equipped with a first transformer, a second transformer, a third transformer, a first compensation capacitor, a second compensation capacitor, a signal output interface, and an impedance converter. The first transformer includes a first signal input interface for receiving a first signal and a second signal input interface for receiving a second signal. The second transformer includes a third signal input interface for receiving a third signal and a fourth signal input interface for receiving a fourth signal. The third transformer includes an input terminal for receiving the outputs of the first and second transformers. The output terminal of the third transformer is connected to the first compensation capacitor. The input terminal of the impedance converter is connected to the output terminal of the third transformer. The output terminal of the impedance converter is connected to the second compensation capacitor and the signal output interface. The transmission lines of the first transformer, the second transformer, the third transformer, and the impedance converter are all connected using radio frequency transmission lines.

[0007] By adopting the above technical solution, each transformer has two input terminals and one output terminal. The two input terminals of the first transformer are respectively connected to the output terminals of the first signal input interface and the second signal input interface, and the output terminal of the first transformer is connected to one input terminal of the third transformer. The two input terminals of the second transformer are respectively connected to the output terminals of the third signal input interface and the fourth input interface, and the output terminal of the second transformer is connected to the other input terminal of the third transformer. The output terminal of the third transformer is connected to the first compensation capacitor, and after compensation, it enters the impedance transformer, and then is output from the signal output interface after passing through the second compensation capacitor. The transmission lines of the first transformer, the second transformer, the third transformer and the impedance transformer are all connected by radio frequency transmission lines, which eliminates impedance mismatch and prevents energy loss and signal distortion.

[0008] Preferably, the output terminals of the first signal input interface and the second signal input interface are respectively connected in parallel to the input terminal of the first transformer via 50Ω radio frequency lines, and a first balancing resistor is connected between the output terminals of the first signal input interface and the second signal input interface via silver-plated copper wire.

[0009] By adopting the above technical solution, two of the four signals are input from the first signal input interface and the second signal input interface, respectively, and enter the first transformer after passing through the first balancing resistor, where they are balanced.

[0010] Preferably, the output terminals of the third signal input interface and the fourth signal input interface are respectively connected in parallel to the input terminal of the second transformer via 50Ω radio frequency lines, and the output terminals of the third signal input interface and the fourth signal input interface are connected to a second balancing resistor via silver-plated copper wire.

[0011] By adopting the above technical solution, the other two signals of the four signals are input from the third signal input interface and the fourth signal input interface respectively, and enter the second transformer after passing through the second balancing resistor, and are balanced by the second balancing resistor.

[0012] Preferably, the output terminals of the first transformer and the second transformer are respectively connected in parallel to the input terminal of the third transformer via two 50Ω radio frequency lines, and the output terminals of the first transformer and the second transformer are connected to a third balancing resistor via a silver-plated copper wire.

[0013] By adopting the above technical solution, the signals output from the first transformer and the second transformer enter the third transformer after passing through the third balancing resistor, and are balanced using the third balancing resistor.

[0014] Preferably, the third transformer further includes a first compensation capacitor, and the output terminal of the third transformer is connected in parallel to the input terminal of the impedance transformer via two 50Ω radio frequency lines and two 75Ω radio frequency lines.

[0015] By adopting the above technical solution, the signal output by the third transformer enters the impedance converter after being compensated by the first compensation capacitor. The impedance formed by the parallel connection of two 50Ω RF lines and two 75Ω RF lines is 15Ω.

[0016] Preferably, the signals input through the first signal input interface and the second signal input interface respectively pass through the first balancing resistor and enter the first transformer, and the first transformer outputs a first composite signal; the signals input through the third signal input interface and the fourth signal input interface pass through the second balancing resistor and enter the second transformer, and the second transformer outputs a second composite signal.

[0017] By adopting the above technical solution, the first synthesized signal and the second synthesized signal enter the third transformer after passing through the third balancing resistor, and are then balanced by the third balancing resistor to serve as the input signal of the third transformer.

[0018] Preferably, the first synthesized signal and the second synthesized signal are respectively fed into the third transformer through the third balancing resistor, and the third synthesized signal is output by the third transformer. The third synthesized signal is then compensated by the first compensation capacitor and enters the impedance transformer. The impedance transformer outputs the transformed signal, and the transformed signal is then compensated by the second compensation capacitor and output by the signal output interface.

[0019] By adopting the above technical solution, the third synthesized signal enters the impedance transformer after the first compensation, and after the impedance transformer outputs the signal, it is output through the signal output interface after the second compensation.

[0020] Preferably, the first balancing resistor and the second balancing resistor are both 100Ω, and the third balancing resistor is 50Ω.

[0021] By adopting the above technical solution, the input of the first signal input interface is 50Ω, and the input of the second signal input interface is also 50Ω. Therefore, a 100Ω balancing resistor is selected as the first balancing resistor, and the same applies to the second balancing resistor. The theoretical value of the output signal of the first transformer should be 25Ω, and the theoretical value of the output signal of the second transformer is also 25Ω. Therefore, a 50Ω balancing resistor is selected as the third balancing resistor.

[0022] Preferably, the first balancing resistor, the second balancing resistor, and the third balancing resistor are all mounted on a balancing resistor printed circuit board.

[0023] By adopting the above technical solution, through the use of a balanced resistor printed circuit board, the number of vias and leads is reduced, parasitic parameters are lowered, and the impedance matching accuracy of high-frequency signals is improved.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The transmission line between the second-stage transmission transformer and the 1:4 impedance converter uses two 50Ω RF lines and two 75Ω RF lines connected in parallel, with a transmission line impedance of 15Ω to meet high-frequency impedance matching.

[0025] 2. A new type of broadband high-power synthesizer, with an operating frequency range of 20MHz-50MHz in the low frequency range, a synthesizing power of up to 10kW, stable impedance, and high synthesizing efficiency.

[0026] 3. Using a balanced resistor printed circuit board as the balanced resistor reduces vias and leads, lowers parasitic parameters, and improves the impedance matching accuracy of high-frequency signals. Attached Figure Description

[0027] Figure 1 This is a circuit diagram of a broadband high-power synthesizer according to this application; Figure 2 This is a detailed drawing of a broadband high-power combiner according to this application; Figure 3 This is an installation diagram of the first transformer of a broadband high-power synthesizer according to this application; Figure 4 This is an installation diagram of the second transformer of a broadband high-power synthesizer according to this application; Figure 5 This is an installation diagram of the third transformer of a broadband high-power synthesizer according to this application; Figure 6 This is an installation diagram of a broadband high-power synthesizer impedance converter according to this application. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0029] This application discloses a broadband high-power synthesizer. Example 1

[0030] Reference Figure 1A broadband high-power combiner includes a transformer printed circuit board. The circuit board is equipped with a first transformer, a second transformer, a third transformer, a first compensation capacitor, a second compensation capacitor, a signal output interface, and an impedance converter. The first transformer includes a first signal input interface for receiving a first signal and a second signal input interface for receiving a second signal. The second transformer includes a third signal input interface for receiving a third signal and a fourth signal input interface for receiving a fourth signal. The third transformer includes an input terminal for receiving the outputs of the first and second transformers. The output terminal of the third transformer is connected to the first compensation capacitor. The input terminal of the impedance converter is connected to the output terminal of the third transformer. The output terminal of the impedance converter is connected to the second compensation capacitor and the signal output interface. The transmission lines of the first, second, and third transformers and the impedance converter are all connected using radio frequency transmission lines. Coaxial cables have a fixed impedance, and coaxial cables support a wider frequency band.

[0031] Reference Figure 2 and Figure 3 The output terminals of the first signal input interface and the second signal input interface are respectively connected in parallel to the input terminal of the first transformer via 50Ω radio frequency lines, and the output terminals of the first signal input interface and the second signal input interface are connected to a first balancing resistor via silver-plated copper wire.

[0032] Reference Figure 1 and Figure 4 The output terminals of the third signal input interface and the fourth signal input interface are respectively connected in parallel to the input terminal of the first transformer via 50Ω radio frequency lines, and the output terminals of the third signal input interface and the fourth signal input interface are connected to a second balancing resistor via silver-plated copper wire; impedance matching is performed by combining magnetic core and transmission line, and the magnetic core compensates for low-frequency inductive reactance to improve low-frequency performance.

[0033] Reference Figure 1 and Figure 5 The output terminals of the first transformer and the second transformer are respectively connected in parallel to the input terminal of the third transformer via two 50Ω radio frequency lines. The output terminals of the first transformer and the second transformer are connected to a third balancing resistor via silver-plated copper wire. The theoretical value of the transmission line between the first transformer and the third transformer should be 25Ω, and two 50Ω radio frequency lines are used for transmission. Similarly, the transmission line between the second transformer and the third transformer also uses two 50Ω radio frequency lines in parallel for transmission.

[0034] Reference Figure 1The third transformer also includes a first compensation capacitor. The output of the third transformer is connected to the input of the impedance converter in parallel via two 50Ω RF lines and two 75Ω RF lines. The theoretical value of the transmission line between the third transformer and the impedance converter should be 12.5Ω. However, after testing, a 15Ω impedance improves the high-frequency return loss index of the 40MHz-50MHz trace. Therefore, this section of the transmission line uses two 50Ω and two 75Ω RF lines in parallel.

[0035] Reference Figure 1 The signals input through the first signal input interface and the second signal input interface pass through the first balancing resistor and enter the first transformer, and the first transformer outputs the first composite signal; the signals input through the third signal input interface and the fourth signal input interface pass through the second balancing resistor and enter the second transformer, and the second transformer outputs the second composite signal. The first transformer and the second transformer combine the two signals and output them, and then the third transformer is used to combine the first composite signal and the second composite signal.

[0036] Reference Figure 1 and Figure 6 The first synthesized signal and the second synthesized signal respectively enter the third transformer through the third balancing resistor. The third transformer outputs the third synthesized signal. The third synthesized signal is compensated by the first compensation capacitor and then enters the impedance transformer. The impedance transformer outputs the transformed signal. The transformed signal is then compensated by the second compensation capacitor and then output by the signal output interface. Before entering the impedance transformer, the third synthesized signal is compensated by the first capacitor. Before the signal is output, it also needs to be compensated by the second capacitor.

[0037] To balance the four signals, the first and second balancing resistors are both set to 100Ω, and the third balancing resistor is set to 50Ω.

[0038] In this embodiment, the transmission of the first transformer, the second transformer, the third transformer, and the impedance transformer all employ a combination of microstrip line and radio frequency (RF) transmission line technology. The balancing resistor connects to the transformer, and the use of transmission lines on the transformer printed circuit board ensures convenient and reliable transformer soldering and installation, as well as consistent transmission phase. The use of RF transmission lines for the connections between the first transformer, the second transformer, and the third transformer, as well as the connection between the third transformer and the impedance transformer, facilitates adjustments to the RF impedance during debugging and testing, allowing for optimal impedance matching within the operating frequency band.

[0039] In this embodiment, the input power combining transformer of the novel broadband high-power combiner utilizes a unique layout structure of the inner and outer conductors of two RF coaxial cables with externally inserted PTFE tubing. This design ensures high amplitude and phase consistency in the insertion loss at the combiner's RF input, improving its withstand voltage. An adjustable-length anti-surge sleeve connects the balancing resistor plate to the input power combining transformer, introducing inductance to reduce the influence of distributed parameters and improve the overall performance of the broadband high-power combiner. Furthermore, all components and raw materials used in the combiner are manufactured and supplied by domestic companies.

[0040] The implementation principle of a broadband high-power combiner according to an embodiment of this application is as follows: When four signals are input to the first signal input interface, the second signal input interface, the third signal input interface, and the fourth signal input interface respectively, the signals through the first signal input interface and the second signal input interface pass through the first balancing resistor and enter the first transformer, from which the first transformer outputs the first synthesized signal; the signals through the third signal interface and the fourth signal interface pass through the second balancing resistor and enter the second transformer, from which the second transformer outputs the second synthesized signal. The first synthesized signal and the second synthesized signal pass through the third balancing resistor and enter the third transformer, from which the third transformer outputs the third synthesized signal. The third synthesized signal is compensated by the first compensation capacitor and then enters the impedance transformer. The signal output by the impedance transformer is compensated by the second compensation capacitor and then output through the signal output interface.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A broadband high-power combiner, characterized in that: It includes a transformer printed circuit board, on which a first transformer, a second transformer, a third transformer, a first compensation capacitor, a second compensation capacitor, a signal output interface, and an impedance converter are respectively provided; The first transformer includes a first signal input interface for receiving a first signal and a second signal input interface for receiving a second signal; The second transformer includes a third signal input interface for receiving a third signal and a fourth signal input interface for receiving a fourth signal; The third transformer includes an input terminal for receiving the output of the first transformer and the output of the second transformer; the output terminal of the third transformer is connected to a first compensation capacitor. The input terminal of the impedance transformer is connected to the output terminal of the third transformer; the output terminal of the impedance transformer is connected to the second compensation capacitor and the signal output interface. The transmission lines of the first transformer, the second transformer, the third transformer, and the impedance converter are all connected by radio frequency transmission lines.

2. A broadband high-power combiner according to claim 1, characterized in that: The output terminals of the first signal input interface and the second signal input interface are respectively connected in parallel to the input terminal of the first transformer via 50Ω radio frequency lines, and a first balancing resistor is connected between the output terminals of the first signal input interface and the second signal input interface via silver-plated copper wire.

3. A broadband high-power combiner according to claim 2, characterized in that: The output terminals of the third signal input interface and the fourth signal input interface are respectively connected in parallel to the input terminal of the second transformer via 50Ω radio frequency lines, and the output terminals of the third signal input interface and the fourth signal input interface are connected to a second balancing resistor via silver-plated copper wire.

4. A broadband high-power combiner according to claim 3, characterized in that: The output terminals of the first transformer and the second transformer are respectively connected in parallel to the input terminal of the third transformer via two 50Ω radio frequency lines. The output terminals of the first transformer and the second transformer are connected to a third balancing resistor via silver-plated copper wire.

5. A broadband high-power combiner according to claim 1, characterized in that: The third transformer also includes a first compensation capacitor, and the output terminal of the third transformer is connected to the input terminal of the impedance transformer in parallel via two 50Ω radio frequency lines and two 75Ω radio frequency lines.

6. A broadband high-power combiner according to claim 4, characterized in that: Signals input through the first signal input interface and the second signal input interface pass through the first balancing resistor and enter the first transformer, from which the first transformer outputs a first composite signal; signals input through the third signal input interface and the fourth signal input interface pass through the second balancing resistor and enter the second transformer, from which the second transformer outputs a second composite signal.

7. A broadband high-power combiner according to claim 6, characterized in that: The first synthesized signal and the second synthesized signal respectively enter the third transformer through the third balancing resistor. The third transformer outputs the third synthesized signal. After being compensated by the first compensation capacitor, the third synthesized signal enters the impedance transformer. The impedance transformer outputs the transformed signal. After being compensated by the second compensation capacitor, the transformed signal is output from the signal output interface.

8. A broadband high-power combiner according to claim 4, characterized in that: The first balancing resistor and the second balancing resistor are both 100Ω, and the third balancing resistor is 50Ω.

9. A broadband high-power combiner according to claim 4, characterized in that: The first balancing resistor, the second balancing resistor, and the third balancing resistor are all mounted on a balancing resistor printed circuit board.

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