kind band
4.This paper introduces a kind of Ka-band microstrip LNB for direct broadcast satellite(DBS). It firstly explains the circuit operation principle and the structure of Ka-band LNB,then studies the design methods of its internal modules and the realization process of the specific circuit made up of microwave components.
5.A Kind of Technique of Base-band Figuration in Digital Communication Systems
9.The results show that this method can prepare the density shell for Fe/Co composites with core-shell structure. Being a kind of microwave Absorber, it can improve the dispersion characteristics of the traditional micrometer Fe particles and provide a frequency band width of 7GHz for Absorbing rate above 8dB.
10.The Direct Digital Frequency Synthesizer is a kind of fully digitized frequency synthesizer, which consists of the phase accumulator, the sine look-up table, the digital to analog converter and the low band filter. It is of high frequency resolution, fast frequency switching speed, low phase noise, the ability to switch frequencies while maintaining constant phase, and the ability to producing arbitrary waveforms.
