A K-band high PAE wide tuning range VCO Using triple-coupled LC tanks

This brief presents a fully differential K-band voltage-controlled oscillator (VCO) using commercial 0.18-μm SiGe BiCMOS process. By using triple-coupled LC tanks with strong coupling and varactor-controlled capacitor bank, the proposed VCO simultaneously achieves a wide tuning range, low phase noise, high output RF power, and high power-added efficiency (PAE). The implemented VCO demonstrates an oscillation frequency range from 22.50 to 26.23 GHz, a frequency tuning range of 15.3%, a phase noise of −107.7 dBc/Hz at 1-MHz offset, an output power of−3.1 dBm, PAE of 5.97%, and a figure of merit of -186.9 dBc/Hz with a dc power of 8.2 mW.Accepted versio

COBE's search for structure in the Big Bang

The launch of Cosmic Background Explorer (COBE) and the definition of Earth Observing System (EOS) are two of the major events at NASA-Goddard. The three experiments contained in COBE (Differential Microwave Radiometer (DMR), Far Infrared Absolute Spectrophotometer (FIRAS), and Diffuse Infrared Background Experiment (DIRBE)) are very important in measuring the big bang. DMR measures the isotropy of the cosmic background (direction of the radiation). FIRAS looks at the spectrum over the whole sky, searching for deviations, and DIRBE operates in the infrared part of the spectrum gathering evidence of the earliest galaxy formation. By special techniques, the radiation coming from the solar system will be distinguished from that of extragalactic origin. Unique graphics will be used to represent the temperature of the emitting material. A cosmic event will be modeled of such importance that it will affect cosmological theory for generations to come. EOS will monitor changes in the Earth's geophysics during a whole solar color cycle

Sixty-eighth annual report of the receipts and expenditures of the city of Manchester, New Hampshire for the fiscal year ending December 31, 1913 together with other annual reports and papers relating to the affairs of the city.

This is an annual report containing vital statistics for a town/city in the state of New Hampshire