RF & Microwave Industry News

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PRODUCT FEATURES High Efficiency L- and S-band Transmitters Emhiser Research Inc.- Verdi, NV A new line of miniature airborne telemetry transmitters has been introduced that uses a proprietary approach to amplifier design and features previously unattainable DC-to-RF efficiencies. The breakthrough design utilizes GaAs FETs in a configuration that eliminates...

PRODUCT FEATURES Multistage Depressed Collector Klystrons Communications & Power Industries Canada Inc. (CPI Canada) Georgetown, Ontario, Canada F inding ways to operate satellite communications (SATCOM) high power klystrons more efficiently has a double-edged benefit. The SATCOM transmitter uses less prime power, saving uninterruptible power supply capacity, and the klystron...

COVER FEATURE A Broadband Bias Tee for Optical Networking Applications Inmet Corp. Ann Arbor, MI T he explosive growth of the Internet has created an insatiable demand for communications bandwidth by everyone, from the Web-browsing individual in the home office, to the multibillion-dollar corporation that is at a severe...

PRODUCT FEATURES A High Power LDMOS Transistor for Broadcast Transmitter Applications Philips Semiconductors Eindhoven, The Netherlands D igitization in the broadcast world is paving the way for major new markets, such as high speed Internet access and mobile multimedia in-car entertainment, as well as high definition TV and a...

PRODUCT FEATURES RF Digital Attenuators in Plastic MLP Packages M/A-COM Lowell, MA B roadband digital attenuators have been used to set power levels in RF and microwave circuits for many years. The concept is to electronically switch resistive T and P networks to attenuate and control signals. In doing...

TECHNICAL FEATURE A High Order Frequency Multiplier for Low Power Applications D.R. Lang Comtech/EFData Tempe, AZ D irect frequency multipliers are commonly used in applications where the added phase noise or circuit complexity of a phase-locked loop is undesirable. At power levels above 1 mW, varactors or step recovery...

TECHNICAL FEATURE SOLR Calibration for Grounded Coplanar Waveguide Lines Shay Gross, Lawrence P. Dunleavy and Thomas M. Weller University of South Florida, Department of Electrical Engineering, Wireless and Microwave (WAMI) Program Tampa, FL This article examines short-open-line-reciprocal (SOLR) calibration of grounded coplanar waveguide (GCPW) lines. The calibration is made...

SPECIAL REPORT CD Radio Promises Data and Audio Listening Relief Ernest Rejman Contributing Editor I f while driving on the interstate you cannot elude Hank Williams' laments about cheatin' love and his long-dead hound, or are trapped in New York, Chicago or San Francisco, irritated by bad reception when...

TECHNICAL NOTES ISM vs. Spread Spectrum -- Avoiding the FCC Mitchell Lazarus Fletcher Heald & Hildreth PLC Arlington, VA T he Federal Communications Commission (FCC) recognizes two types of devices that intentionally emit RF energy: communications equipment and everything else. The first category includes AM/FM, TV, point-to-point, satellite, cell...

SPECIAL REPORT Acronyms and Abbreviations Used by the RF/Microwave Industry Frank Bashore Microwave Journal Staff T his list represents most of the acronyms and abbreviations used in Microwave Journal technical articles and editorial features during the last five years. The ever-growing list has proven enormously useful to our staff...