An arrayed multi-path frequency-locked phase-locked magnetron monitoring system

Abstract

The application discloses an arrayed multi-path frequency-locked magnetron monitoring system, which comprises an arrayed multi-path magnetron, a multi-path coupling mixer capable of receiving signals emitted by the arrayed multi-path magnetron, a multi-path filter-amplifier assembly connected with an output end of the multi-path coupling mixer, a time-division multi-selection switch connected with an output end of the multi-path filter-amplifier assembly, an output end of an AD sampling assembly is connected with a data processing system and a multi-path frequency synthesis source respectively, an output end of the multi-path frequency synthesis source is connected with a mixing frequency input end of the multi-path coupling mixer, and the monitoring system further comprises a reference clock connected with the AD sampling assembly and the multi-path frequency synthesis source. The application adopts multi-path coupling mixing, multi-path switching, AD acquisition and data processing on multi-path signals in time division, obtains multi-path magnetron parameter information in time division, and improves sampling accuracy by adopting multi-path frequency synthesis source feedback, and reduces equipment volume and power consumption.

Description

Technical Field

[0001] This invention belongs to the field of electronic technology, specifically microwave technology, and more specifically to an arrayed multi-channel frequency-locked phase-locked magnetron monitoring system. Background Technology

[0002] In recent years, research on the theoretical system of microwave directed energy and the development of related systems have become increasingly diversified. Among them, the arrayed multi-channel frequency-locked phase-locked magnetron system has become one of the representatives of new microwave directed energy systems due to its advantages such as low cost of magnetrons, ease of debugging, stable high power output, and high duty cycle. For example, existing related patents such as CN202210097801.9, CN202210099180.8, and CN202211516258.8 all involve arrayed multi-channel frequency-locked phase-locked technology.

[0003] After the arrayed multi-channel frequency-locked phase-locked magnetron system is built, it is necessary to monitor the signal output of each magnetron. The monitoring parameters include, but are not limited to, microwave power (amplitude), frequency, and phase. The common monitoring methods for a single magnetron output are as follows: power or amplitude is tested using a water load or dry load, or a low-power measurement can be performed using a directional coupler coupled with attenuated signals; frequency and phase can be acquired and measured using a spectrum analyzer or a high-speed oscilloscope.

[0004] However, if the multi-channel magnetron signals are also measured in the above manner, the monitoring system will be extremely large and expensive. Summary of the Invention

[0005] To overcome the technical defects of the existing technology, this invention discloses an arrayed multi-channel frequency-locked phase-locked magnetron monitoring system.

[0006] The arrayed multi-channel frequency-locked phase-locked magnetron monitoring system of the present invention includes an arrayed multi-channel magnetron, a multi-channel coupling mixer capable of receiving signals transmitted by the arrayed multi-channel magnetron, a multi-channel filtering and amplifying component connected to the output of the multi-channel coupling mixer, a time-division multiplexer connected to the output of the multi-channel filtering and amplifying component, the output of the time-division multiplexer connected to an AD sampling component, the output of the AD sampling component connected to a data processing system and a multi-channel frequency synthesis source respectively, the output of the multi-channel frequency synthesis source connected to the phase-stable frequency input of the multi-channel coupling mixer, and the monitoring system further includes a reference clock that simultaneously provides clock signals to the AD sampling component and the multi-channel frequency synthesis source.

[0007] Preferably, the monitoring system uses a mixer to process the microwave signal to obtain an intermediate frequency signal with a frequency between 10MHz and 200MHz.

[0008] Preferably, the multi-channel frequency synthesis source is a direct digital frequency synthesis source.

[0009] Preferably, the time-division multiple-selector switch performs time-division acquisition of the intermediate frequency signal and inputs it to the AD sampling component.

[0010] The arrayed multi-channel frequency-locked phase-locked magnetron monitoring system described in this invention employs multi-channel coupling mixing and multi-channel switching to perform time-division A / D acquisition and data processing on multiple signals to obtain time-division multi-channel magnetron parameter information, including multi-channel microwave power, frequency, and phase. Finally, accurate magnetron microwave output parameters can be obtained through digital signal algorithms. By using multi-channel frequency synthesis source feedback, the sampling accuracy is improved, and the equipment size and power consumption are reduced. This invention can achieve fast, low-cost, real-time frequency and phase discrimination across a wide frequency band and at different power levels. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a specific implementation of the arrayed multi-channel frequency-locked phase-locked magnetron monitoring system of the present invention. Detailed Implementation

[0012] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0013] Figure 1 This is a system block diagram of a specific embodiment of the arrayed multi-channel frequency-locked phase-locked magnetron monitoring system of the present invention. The following is a detailed description of the system block diagram and its working principle:

[0014] The arrayed multi-channel magnetrons emit microwave output signals with a frequency of point frequency, ranging from 900MHz to 100GHz, covering the microwave L to W bands, and with power ranging from hundreds of watts to tens of megawatts, and duty cycles from one ten-thousandth to continuous waves.

[0015] A multi-channel coupled mixer consists of couplers, a power divider array, a mixer, and a detection control circuit. The coupler couples a portion of the signal output from the power vacuum device to a low-power signal circuit. This circuit structure is typically implemented using a bridge circuit. Multiple high-power vacuum device microwave signals correspond to multiple couplers. The coupler uses a passive spatial coupling structure and various coupling methods, such as vias, to attenuate and transform the high-power microwave signals to a lower power level that is easier to measure.

[0016] Since there may be multiple output channels for a vacuum tube, a corresponding number of coupling mixers are also required. The mixers mix the coupled arrayed multiple magnetron output signals with the stable phase signals from multiple frequency synthesis sources to obtain an intermediate frequency signal that records information such as the amplitude and instantaneous phase of the vacuum device signal.

[0017] Since the amplitude and phase of the intermediate frequency signal are affected by the amplitude of the magnetron signal and are constantly changing, in order to accurately measure the amplitude and phase of the signal, a phase-stabilized signal with a fixed frequency difference from the input signal is needed as the phase-stabilized signal of the multi-channel coupled mixer. The phase-stabilized signal of the mixer is generated by the frequency synthesizer based on the output signal of the arrayed multiple magnetron.

[0018] The intermediate frequency (IF) signal output from the mixer needs to be filtered and amplified. A multi-channel filter and amplifier module amplifies the IF signal amplitude while preserving its phase information.

[0019] A multi-channel frequency synthesis source is a device that uses one or more standard signals to generate a large number of discrete frequency signals through various technical means.

[0020] Direct digital frequency synthesis (DDS) technology is the third generation of frequency synthesis technology, rapidly developing alongside the advancements in digital integrated circuits and microelectronics, following direct and indirect frequency synthesis. Based on digital signal processing theory, it synthesizes frequencies by starting with the amplitude-phase relationship of the signal. It boasts numerous advantages, including extremely high frequency resolution, extremely short frequency conversion time, wide relative bandwidth, continuous signal phase during frequency conversion, the ability to output arbitrary waveforms, and digital modulation capabilities. In this system, multiple frequency synthesis sources are used to generate signals with frequencies and amplitudes close to those of the magnetron output signal. After mixing, a relatively low-frequency analog signal, easily accessible for digital acquisition, is obtained.

[0021] In this invention, a multi-channel frequency synthesizer extracts the input microwave signal frequency f from the digital signal output by the AD sampling component. By superimposing an additional frequency Δf with a reference clock, the stable phase signal frequency f1 = f + Δf output by the multi-channel frequency synthesizer is obtained. After the stable phase signal frequency is input to the multi-channel coupling mixer, the frequency and phase of the input microwave signal are discriminated using a fixed frequency difference Δf with the microwave signal frequency F. The intermediate frequency signal, which records the amplitude and instantaneous phase information of the microwave signal, is then measured and obtained.

[0022] The reference clock provides the same and accurate frequency clock for multiple frequency synthesis sources and AD components.

[0023] The multi-select-1 switch function enables time-division switching of multiple signals. It sends the filtered and amplified intermediate frequency signals to the AD acquisition component in a time-division manner. Through the time-division switching, the output signal only needs one set of AD sampling devices, eliminating the need for multiple sets of AD sampling devices in the past, thus reducing the size and cost of the equipment.

[0024] The AD acquisition component consists of a data acquisition card that operates in the intermediate frequency (IF) band. Data acquisition refers to the automatic acquisition of the analog or digital signals being measured by the device and its transmission to a host computer for analysis and processing. The data acquisition card, essentially a computer expansion card that performs data acquisition, can be connected to a computer or data processing system via buses such as USB, PXI, PCI, and PCI Express. In this system, the AD acquisition component acquires a specific signal selected by a time-division multiplexer and ultimately sends it to the data processing system.

[0025] The data processing system uses a general digital signal algorithm to post-process the information from the AD acquisition component to obtain the relevant output parameters of the magnetron, including but not limited to microwave power (amplitude), frequency, and phase.

[0026] The arrayed multi-channel frequency-locked phase-locked magnetron monitoring system described in this invention employs multi-channel coupling mixing and multi-channel switching to perform time-division AD acquisition and data processing on multiple signals to obtain time-division multi-channel magnetron parameter information, including multi-channel microwave power, frequency, phase, etc. Finally, accurate magnetron microwave output parameters can be obtained through digital signal algorithms. By using multi-channel frequency synthesis source feedback, the sampling accuracy is improved, and the equipment size and power consumption are reduced.

[0027] The foregoing descriptions are preferred embodiments of the present invention. Unless there is a clear contradiction between the preferred embodiments or a prerequisite for a particular preferred embodiment, the preferred embodiments can be arbitrarily combined and used. The embodiments and specific parameters described are only for clearly illustrating the inventor's invention verification process and are not intended to limit the scope of patent protection of the present invention. The scope of patent protection of the present invention shall still be determined by its claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A multi-channel frequency-locked phase-locked magnetron monitoring system, characterized in that, The system includes an arrayed multiplex magnetron, a multiplexed mixer capable of receiving signals transmitted by the arrayed multiplex magnetron, a multiplexed filter amplifier connected to the output of the multiplexed mixer, a time-division multiplexer connected to the output of the multiplexed filter amplifier, an AD sampling component connected to the output of the time-division multiplexer, an AD sampling component whose output is connected to a data processing system and a multiplexed frequency synthesizer, and a multiplexed frequency synthesizer whose output is connected to the phase-stable frequency input of the multiplexed mixer. The monitoring system also includes a reference clock that simultaneously provides clock signals to the AD sampling component and the multiplexed frequency synthesizer.

2. The arrayed multi-channel frequency-locked phase-locked magnetron monitoring system as described in claim 1, characterized in that, The monitoring system uses a mixer to process microwave signals to obtain intermediate frequency signals with frequencies ranging from 10MHz to 200MHz.

3. The arrayed multi-channel frequency-locked phase-locked magnetron monitoring system as described in claim 1, characterized in that, The multi-channel frequency synthesis source is a direct digital frequency synthesis source.

4. The arrayed multi-channel frequency-locked phase-locked magnetron monitoring system as described in claim 1, characterized in that, The time-division multiplexer switch performs time-division acquisition of the intermediate frequency signal and inputs it into the AD sampling component.

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