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Cellular Mobile Radio Communication Channels in View of Smart Antenna Systems Smart antenna systems use signal processing methods in conjunction with multiple antennas to achieve significant improvements in capacity and range for wireless mobile communications. Temporal and spatial filtering techniques are devised to effectively mitigate co-channel interference and remove...
Around the Circuit INDUSTRY NEWS Telecommunication equipment supplier Eagle Wireless International Inc. , Houston, TX, has completed its acquisition of the assets of electronic wellhead controller manufacturer W&H Development Inc. , also of Houston. Eagle Wireless reports that W&H Development’s products will help expand the functionality and markets for...
New Literature Product Application Brochure This eight-page brochure includes specifications on radar amplifiers, CW TWT amplifiers, electromagnetic compatibility amplifier systems, laboratory amplifiers and transmitters. Applied Systems Engineering Inc., Fort Worth, TX (817) 249-4180. Ceramic-to-metal Component Brochure This six-page brochure outlines ceramic-to-metal components designed to withstand demanding environments, including extreme...
COMPONENTS Step Attenuators The models 50V10 and 50V70 rotary step attenuators provide attenuation ranges of 0 to 10 dB and 0 to 70 dB over the cellular/personal communications service (PCS) frequencies of 800 to 2000 MHz. Each unit is supplied with index stops, knobs and provisions to panel mount...
SOFTWARE CAE/CAD Software The EMSight™ series computer-aided engineering (CAE)/CAD three-dimensional electromagnetic simulation package is designed for the analysis of planar high frequency circuits and antenna structures. The package combines a powerful fullwave spectral domain simulation approach with a Windows graphical user interface, and can analyze the electrical behavior of...
MATERIALS Radar-absorbing Materials These microwave materials are available with value-added features, including die-cut parts, ground planes and peel-and-stick adhesive backing to assist in manufacturing assembly. The products operate from 0.7 to 18 GHz and are either urethane-based, silicon-based, lossy foam or broadband absorber solutions. ARC Technologies Inc., Amesbury, MA...
SYSTEMS 38 GHz mm-wave Radios The MicroStar" Plus 38 series point-to-point digital radios operate in the 38 GHz frequency band for voice/data applications and can accommodate DS3 traffic. The outdoor RF unit with integrated flat antenna is connected to the indoor unit with a single coaxial cable. The units...
ANTENNAS Outdoor Antenna Kits These point-to-point antenna kits provide secure wireless building-to-building data communications at a 2 Mbps data rate at a range of up to 17 kilometers. The outdoor antenna solutions provide a flexible alternative to wired T1 and leased lines connecting multiple buildings in a campus or...
AMPLIFIERS Multiband High Power Linear Amplifier System The model BHE27258-300 linear amplifier system operates from 20 to 2500 MHz with a maximum output power of 300 W. Powered by a common single-phase power supply, the three separate bands (20 to 500 MHz, 500 to 1000 MHz and 1000 to...
DEVICES Tuning Varactor Diodes The hyperabrupt series (GVD1400, GVD20400 and GVD20430) silicon tuning varactor diodes feature a variety of capacitance ratios: the GVD1400 series models are suitable for broadband applications up to VHF, the GVD20420 models are suitable for VHF and UHF frequencies, and the GVD20430 models are suitable...
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