Sökresultat

Filtyp

Din sökning på "*" gav 532087 sökträffar

A 5.4GHz 90-nm CMOS digitally controlled LC oscillator with 21% tuning range, 1.1MHz resolution, and 180dB FOM

A 5.4 GHz digitally controlled oscillator (DCO) has been implemented in a 90-nm CMOS process. It has three different frequency control words, coarse, medium, and fine. The coarse control bank uses MIM capacitors and differential MOS switches. The other banks use MOS varactors. The phase noise was measured at the output of an on-chip divide by 2 circuit. It is -132 dBc/Hz at 3 MHz offset from the 2

Floodwater recharge to improve sustainable water supply in arid Iran

Groundwater depletion in arid areas is of increasing concern in the Middle East. Small precipitation and high evaporation losses during the dry season lead to water shortage in arid areas. The optimum development of groundwater resources is generally associated with abstractions from the aquifer balancing the recharge to it. When abstractions exceed recharge, many undesirable effects may result. D

An inverse scattering problem in metallic waveguides filled with bianisotropic material

This paper presents an analysis with the aim of characterizing an arbitrary linear, bianisotropic material inside a metallic waveguide. The result is that if the number of propagating modes are the same inside and outside the material under test, it is possible to determine the propagation constants of the modes inside the material by using scattering data from two samples with different lengths.

Propagation of transient electromagnetic waves in inhomogeneous and dispersive waveguides

Transient wave propagation in a waveguide filled with an inhomogeneous dispersive medium is analyzed. The waveguide is inhomogeneous in the longitudinal direction, but is homogeneously filled in the transverse directions. The analysis is performed in the time domain and is based upon a wave splitting technique and the method of propagators. The propagator maps the exciting field from one position