Industry News

G/T for a Satellite-Terrestrial Handset with Internal and External Antennas

In this paper, the figures of merit for a satellite-terrestrial handset with internal and external antennas are extracted, based on the antenna measurements with the handset mechanics in free space. The gain statistics are derived from the measured ant...
The figure of merit (G/T) for a satellite-terrestrial handset is a critical parameter for the link budget calculations, where G is antenna gain, which varies with elevation and azimuth angles, and T is the system noise temperature, which is the sum of the handset receiver and its antenna noise...
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Design of a Fifth-order Analog Predistorter for Base Station HPA of Cellular Mobile Systems

This article presents the design of a fifth-order analog predistorter for use in base station high power amplifiers (HPA). The predistorter employs two intermodulation (IM) signal generators with identical configuration, to individually generate the th...
The high power amplifier is an important building block in wireless communication systems, but is inherently nonlinear. The nonlinearity results in intermodulation of the input signals, causing intermodulation distortion products at the output of the HPA and hence adjacent channel interference. 1 Thus, linearization methods are usually employed in...
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Compact CPW-Fed UWB Antenna with a Notched Band Characteristic

A CPW-fed, ultra-wideband, antenna with a band-notch characteristic is presented. The antenna consists of a CPW ground with a wide slot, a fork-like radiation patch, a tuning stub and a 50 Ω CPW-fed structure. The notched band frequency is obtaine...
With the development of modern wireless communications, the ultra-wideband (UWB) systems have attracted much attention recently because of their advantages, including high speed data, small size, low cost and low complexity. The antenna of the ultra-wideband systems plays an important role in the receiving and transmitting of ultra-wideband radiation....
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Trends in SATCOM Technology Requirements and Market Opportunities

Cost pressure, increasing SATCOM dependence and a "do more with less" mantra coming from the halls of the Pentagon, government agencies and commercial satellite owner/operators are leading to innovative thinking from vendors and users alike. Eric DeMarco, President and CEO of Kratos Defense & Security Solutions, has said, "In...
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Raytheon Receives $51.6 M Contract for Satellite Communication Support

The U.S. Navy has awarded Raytheon Co. a $51.6 M contract to provide logistics support for the communication terminals of the Navy's Extremely High Frequency Satellite Program (NESP). The performance-based logistics contract calls for Raytheon Technical Services Co. LLC (RTSC) to fulfill all requisitions; warehouse and track government-furnished material;...
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