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Farmland fragmentation is a land use pattern contrary to land formula management. It would lead to farmland's shrinking and decentralization, and reduce the output efficiency. Carrying out spatial evaluation of farmland fragmentation is the premise and foundation of improving the land use efficiency. The paper selected Chaohu Basin as the research object, regarded 3km size grid as research unit, constructed...
Although single phase to ground fault location in non-solid grounded networks has been studied for many years and a lot of research has been done, yet adequate solution for direct fault location of radial distribution network hasn't been made, especially for the distribution network with the neutral point grounded via arc suppression coil. Involvement of the arc suppression coil may decrease short-circuit...
The selection of the faulty feeder in the case of single phase-to-earth fault in a Neutral Un-effectively Grounded System (NUGS) has been one of the conventional problems of distribution network. The compensation method is introduced to highlight the difference of the zero-sequence admittances between the faulted feeder and the sound feeder. In this way, the setting of the criterion becomes feasible...
A novel single-ended traveling wave fault location method applicable to the distribution network with multiple branches is presented in this paper. The method only depends on the arrival times of the initial aerial-mode and zero-mode travelling wave, and it is not affected by structure of a distribution system itself. Therefore, good results can be achieved for precise fault locating in multi-source...
This paper presents a 20Gb/s Limiting Amplifier (LA) with the active interleaving feedback technique both to broaden the bandwidth and achieve flatness response. The LA includes an input match and DC offset cancellation (DCOC), a four-stage 3rd order amplifier core and an output buffer for test. Simulated in the 65nm CMOS technology, the LA exhibits a voltage gain of 38.5dB, a 3-dB bandwidth of 18GHz...
A low-power, high linearity and wideband passive mixer for SDR is presented The passive mixer employs the improved current-reuse Gm stage, combines source degeneration with MGTR to extend the linearity region while enhance the IIP3 performance Measured results show the design achieves a good linearity even though the power of input RF signal is up to −14dBm (Vpp is about 160mV, consider the balun's...
This paper presents a k-band (18–26.5 GHz) high gain low noise amplifier (LNA) in 65-nm CMOS mixed signal process. The LNA has a peak gain of 20.46 dB at 22.45 GHz and a −3 dB bandwidth of 3.8 GHz. S11 of the chip is better than −11 dB and S22 better than −15 dB across the band. The measured smallest noise figure (NF) is 3.4 dB. The whole chip consumes 11mA current under 1.1V supply voltage and occupies...
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