Abstract - This paper presents a new design of microwave microelectromechanical systems (MEMS) phase shifter for dual band wireless local area network (WLAN) applications. A bit is designed which product a constant phase shift of 11.25° by switching between two line that consist of 12 and 6 unitcells in each frequency band. A unitcell is constructed by gold membrane suspended over the coplanar ...

The phenomenon of “planetary period oscillations” in Saturn’s magnetosphere was first observed by the Voyager spacecraft via modulations near the planetary rotation period in the intensity of radio emissions at kilometer wavelengths [Warwick et al., 1981; Desch and Kaiser, 1981], together with related oscillations in particles and magnetic fields in situ within the magnetosphere [Carbary and Kr...

In radio telescope arrays, the complex receiver gains and sensor noise powers are initially unknown and have to be calibrated. This can be done by observing a strong astronomical point source. Here we extend the calibration algorithms to the case of dual polarized arrays. The algorithms are based on factor analysis and eigenvalue decompositions. We show that a single observation does not provid...

Multiple 60-GHz WPAN (Wireless Personal Area Network) radio transceiver chips using CMOS or BiCMOS process have been developed as wireless communication service of several-gigabit rate [Reynolds, 2006] [Razavi, 2006]. In a 60GHz millimetre-wave transceiver, frequency synthesizer is a key building block. It is very difficult to design the PLL-based programmable synthesizer directly at 60GHz band...

Mortality among hemodialysis patients remains unacceptably high in the USA, especially among newly diagnosed end-stage renal disease patients. Chronic inflammation is a risk factor for cardiovascular disease among HD patients. It has been shown that complications of the arteriovenous (AV) access are not just limited to overt infectious complications but they may also pose a threat as a haven fo...

During a 16-month period when 93 renal transplants were performed, eight kidney graft ruptures were detected within 18 days of transplantation, without evidence of venous obstruction. Six grafts were removed at the time of an exploratory operation for rupture and only one showed signs of probable irreversible rejection when examined by microscopy. Two graft ruptures were repaired and one of the...

This paper evaluates the positioning performance of a single-frequency software GPS receiver using Ionospheric and Tropospheric corrections. While a dual-frequency user has the ability to eliminate the ionosphere error by taking a linear combination of observables, a single-frequency user must remove or calibrate this error by other means. To remove the ionosphere error we take advantage of the...

SOMMARIO/ABSTRACT Preferences typically define a partial ordering over outcomes. A number of formalisms like soft constraints and CP-nets exists to specify such partial or-derings. In situations involving multiple agents, we need to combine the preferences of several individuals. In this paper, we consider each agent as voting on whether they prefer one outcome to another. We prove that, under ...