Phase compensation circuit and phase compensation method for ultra-wideband multi-path frequency conversion link

Abstract

The invention discloses a phase compensation circuit of an ultra wide band multi-path frequency conversion link, which comprises a temperature sensor, a memory, a logic controller, a digital phase shifter and a driver, and is characterized in that the temperature sensor and the memory are connected with the logic controller; the logic controller controls the driver through the control code; and the driver is connected with a digital phase shifter arranged in the local oscillator circuit. According to the phase compensation method, a logic controller is adopted as a core, temperature information of a temperature sensor is read and combined with frequency code information provided by a system, control code data programmed in advance in a memory are read, and a digital phase shifter located in a local oscillator link is controlled to adjust phase consistency of a broadband frequency conversion link. According to the invention, the digital phase shifter is adopted for compensation in a local oscillator link, the compensation precision is high, and parasitic amplitude modulation generated during phase shifting is small; frequency codes and temperature information are combined to carry out digital phase shift compensation, and phase compensation under ultra-wideband and full-characteristic temperature conditions is realized.

Description

technical field [0001] The invention relates to a phase compensation circuit and a phase compensation method of a frequency conversion link, in particular to a phase compensation circuit and a phase compensation method of an ultra-wideband, multi-channel frequency conversion link. Background technique [0002] According to the principle of radar, the operating bandwidth of the radar is directly related to its distance resolution. The wider the operating bandwidth, the higher the distance resolution of the radar. The penetrating power is reflected in its frequency range from low frequency to millimeter wave band or even higher. Different The frequency is suitable for various transmission environments, and the penetrating power is extremely strong. In recent years, with the rapid development of electronic countermeasures technology, anti-radiation radar has been developing in the direction of wider frequency range and large instantaneous broadband. [0003] The application fi...

AI Technical Summary

Problems solved by technology

[0003] The application fields of multi-channel ultra-broadband frequency conversion products cover missile-borne broadband seeker system, ship-borne countermeasure communication integrated system, missile-borne defense penetration system, and satellite communication. They are generally used between RF front-ends and digital acquisition modules. The ultra-wideband radio frequency signal is processed into a narrow-band low-frequency signal that can be digitally collected. It is the core component of the ultra-wideband radar receiver. One of the indicators is the phase consistency between multiple frequency conversion channels. At present, most of them need to be guaranteed by process, device and circuit design means, or do some microstrips to adjust the electrical length. It is also possible under the condition of not wide bandwidth. It meets the requirements of phase consistency, but it cannot meet the wideband working conditions due to the dispersion effect of the microstrip under broadband or even ultra-wideband conditions

Therefore, the phase compensation of full temperature and full frequency band is generally done when the overall system is jointly debugged, which is time-consuming and laborious, and the workload is heavy.

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