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High efficiency microwave amplifiers with low supply voltages are required for mobile telecommunications services, such as GSM or DCS1800 systems. Theoretically, class-F power amplifiers (PA) can achieve 100 percent drain efficiency by maximally flattening the voltage and current waveforms of the active device. 1 By increasing the efficiency of...

As discussed in part one of this article, the measurement of very good VCOs at large frequency offsets is limited by the spectrum analyzer’s dynamic range. This limitation can be overcome by using carrier filtering and selective amplification of noise at the offset frequency of interest. The bandpass filter...

Both the IRIDIUM (LEO) and Odyssey (MEO) mobile satellite systems use constellations to provide worldwide continuous coverage. Each satellite in the constellation produces antenna beams covering wide areas. However, because the coverage areas are large, and the users in a coverage area may exceed the capacity of a single...

Ultra-high Speed Attenuator The model ADVAN-218-15DD options HS25NS and 5B is a 2 to 18 GHz digitally variable attenuator. This model offers a dynamic range of 15 dB in 0.5 dB steps and uses 5 bit binary control. The switching speed is 15 ns maximum, 6 ns typical. The...

Industry News General Dynamics has completed its acquisition of Newton, NC-based TriPoint Global Communications Inc. , a privately held provider of ground-based satellite and wireless communication equipment and integration services for video, voice and data applications worldwide. Terms of the acquisition were not disclosed. Modelithics Inc. , Tampa, FL,...

Capabilities and Products Brochure This brochure highlights the company’s capabilities and products including the development of products for military programs, the design and fabrication of high power amplifiers, and system refurbishment and modernization. Aethercomm Inc., San Marcos, CA (760) 598-4340, www.aethercomm.com Solutions Guide This comprehensive connector solutions guide is...

Test Software The InterLab® program is available in three different versions including InterLab Solo, Professional (two to five users) and Enterprise (over five users). With InterLab, only one tool is necessary to make engineering processes, test and measurement procedures and information management processes more efficient. Measurement and test results...

Raytheon’s ASQ-228 ATFLIR targeting pod is now deployed with two F/A-18C Hornet squadrons onboard the USS John F. Kennedy (CVN 67). Delivered to the Navy just weeks before deployment, these ATFLIR pods successfully completed numerous missions during July — without missing a single sortie. “Only ATFLIR is designed and...

Harris Corp., in cooperation with Lockheed Martin Aeronautics Co., Ft. Worth, TX, and Rockwell Collins Government Systems, Cedar Rapids, IO, recently demonstrated a first-ever small diameter, multifunction advanced data-link prototype antenna that accurately receives signals from military communications satellites. The specialized, phased array antenna, developed by Harris, under a...

Northrop Grumman Corp. has been selected by the US Air Force to design, build and demonstrate a prototype optical aperture system that will enable laser communications between aircraft and space-base platforms. The Airborne Lasercom Terminal — Optical Aperture technology demonstration will mature technology prior to a separately awarded terminal...