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An 85–115 GHz three-stage monolithic millimeter-wave integrated circuit (MMIC) amplifier based on 90-nm InAlAs/InGaAs/InP pseudomorphic high electron-mobility transistor (PHEMT) devices has been designed. The PHEMT (0.09×2×25um2)used in this design has a dc transconductance (gm) of 1640 mS/mm with ft =247 GHz and fmax=392 GHz. The monolithic three-stage amplifier demonstrates a small-signal gain of...
To secure the free-roaming mobile agent's data protection, especially to resist the colluded truncation attack, we proposed a new security mechanism which can not only satisfy security demands, but can also solve the bottleneck problem caused by trusted third party, we call the new mechanism ISTCM. In ISTCM, task sponsor first chooses a certain number of hosts as partners at random. When agent reaches...
To secure the free-roaming mobile agent's data protection, especially to resist the colluded truncation attack, we made a tentative analysis on the current solutions of these problems and proposed a new security mechanism, which is called Signature Trust Chain Mechanism (STCM). In STCM, data is encrypted into a divisible whole for protection. When reaching a host, agent concatenates the data carried...
As an RF power device, SOILDMOS has a huge market demand and broad development prospects. In this paper, we conduct extensive measurement of the SOILDMOS chip using the vector network analyzer, microwave probe station, semiconductor parameter analyzer. The measuring results are obtained with Agilent IC-CAP 2008. With these results, SOILDMOS can be modeled based on the HiSIM-HV model. The parameter...
A new structure of tunneling gyroscope which is high-accuracy and low-range was presented in this paper, as well as the structure and the operating principles of this gyroscope were analyzed. Besides, the simulations were made in this paper which is close to the principle. Then the structure was fabricated by MEMS technological processes. And its tunneling effect was tested by HP4156C high precise...
In order to increase the capacitive accelerometer testing accuracy, to increase its usefulness, the comb-capacitive accelerometer is selected, the use of capacitive differential detection principle to detect acceleration changes; Based on the capacitance charge-discharge characteristics, design the small differential capacitance detection circuit, including C-V converter, differential amplification,...
A number of logics have been proposed to analyze the cryptographic protocols, but most of them cannot explicitly express time factor which plays an important role in protocols. In this paper, we present a logic to model the time in cryptographic protocols. Our logic is based on the predicate modal logic, so, the time factor can be expressed by invoking a time variable as a parameter of predicate and...
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