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In order to get high output power to load, a methodology called load-pull and source-pull is often utilized to select the optimal input and output impedance. Based on the methodology, using the GaN HEMT CGHV1F006S from CREE, simulation is performed by using microwave simulation software ADS. The results indicate that within 8.5GHz–10.2GHz, Delivered Power is higher than 37 dBm with Gain Ripple being...
When applied to a broadband high-resolution radar, the traditional approaches of CFAR (Constant False Alarm Processing) can't strike a balance between efficiency and performance. This paper proposes a new approach of CFAR which is realized on a multicore DSP platform: TMS320C6678. First, two-dimensional OSCA-CFAR algorithm has been improved by adding the extraction from range and azimuth. Then the...
Micro-motion characteristics of the sea corner-reflector jamming and the ship are different. The corresponding time-frequency feature extracted from the time-frequency representation (TFR) of the target echo can be used to discriminate the corner-reflector jamming and the ship. Three parameters, including the micro motion period, the time-frequency spectrum entropy and the maximum of micro-Doppler...
As the traditional radar system can't quickly and effectively identify group targets, this paper uses a millimeter-wave radar system to identify, sort and track the sea fleet targets. The radar scans the sea surface firstly to get the DBS image, then the image is processed by the CFAR processor to detect the fleet targets, and finally according to various parameters provided by the INS (inertial navigation...
Ultra wideband (UWB) antenna is widely used in UWB communication, radar and electronic warfare in recent years. UWB antenna is indispensable in impulse radar, which transmits and receives short electromagnetic pulse signals, and preserves the waveform well. To detect and track moving-target, UWB time-domain antenna array is studied in this paper. Firstly, the theory of time-domain antenna array scan...
To reduce phase noise of microwave-band frequency synthesizer based on phase-locked loop(PLL), the method that the output signal of VCO is mixed with a Lo signal and the IF signal is detected, is proposed. Then, the compatible loop filter is designed. Finally, the experimental results prove that the phase noise of improved frequency synthesizer is greatly lower than that of directly phase-locked synthesizer.
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