Ultra wide band radar frequency synthesizer device

Abstract

The invention discloses an ultra wide band radar frequency synthesizer device. The ultra wide band radar frequency synthesizer device is characterized in that a direct frequency synthesizer receives a clock signal and generates a phase discrimination frequency signal, the phase discrimination frequency signal is sent to a reference clock signal input port of an integrated digital phase discriminator after being filtered through a surface acoustic wave filter, radio-frequency signals output by a voltage-controlled oscillator are allocated by a coupling power divider to obtain a path of through connection signals and a path of coupling signals, the through connection signals are the ultra wide band signal output of the frequency synthesizer, the coupling signals enter a radio frequency input port of the integrated digital phase discriminator after the frequency division is conducted on the coupling signals through a frequency divider, the integrated digital phase discriminator outputs voltage-controlled signals after conducting phase discrimination on the radio frequency input port and the reference clock signal input port, and the voltage-controlled signals are input into a voltage-controlled port of the voltage-controlled oscillator after being filtered by a loop filter. The ultra wide band radar frequency synthesizer device achieves a bandwidth of more than 4G, is small in size at the same time, and has the advantages of being simple in circuit and easy to realize.

Description

technical field [0001] The invention relates to the technical field of radar devices, in particular to an ultra-wideband radar frequency synthesizer device. [0002] Background technique [0003] Bandwidth is the sign that ultra-wideband radar is different from narrow-band radar. Compared with narrow-band radar, ultra-wideband radar can provide more target information, and can also perform more effective target identification. With the advancement of radar signal processing technology, the bandwidth of video signals that can be processed is getting wider and wider, making the original operating frequency and bandwidth of radar frequency synthesizers unable to meet the technical requirements of ultra-wideband active phased array radar. [0004] The realization of the traditional ultra-wideband frequency synthesizer is to divide the frequency band into signals composed of different sub-bands, which are combined by a series of narrowband frequency synthesizers. This method has...

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Problems solved by technology

[0005] 1. The device is complex, and it is usually necessary to design a low-frequency frequency synthesizer module, followed by frequency multiplication, filtering and amplification modules. Under the requirements of low spurious and low phase noise indicators of radar frequency synthesizers, this type of filtering is designed Devices have higher requirements for designers;

[0006] 2. The cost is high and the volume is large. It is necessary to use a group of frequency synthesizer modules with adjacent frequency bands in parallel. The output of this group of frequency synthesizers is gated by a band-pass filter bank to obtain the final output.

This causes the cost of the frequency synthesizer to increase exponentially, and the volume also increases exponentially, which is not conducive to miniaturization;

[0007] 3. The frequency interval is not adjustable, limited by the integer frequency division phase detector, only a fixed frequency interval can be realized

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