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Cover Feature A High Gain Power Amplifier with Variable Bias for Multi-mode WCMDA Applications RF Micro Devices Greensboro, NC This article describes a new high performance power amplifier (PA) for wideband code division multiple access (WCDMA) applications. With the transition from second generation (2G) systems, such as Global System...

Product Feature An X-band, High Power, MMIC-based Microwave Amplifier Milmega Ltd. Isle of Wight, UK When established performance ranges are extended, it is often a simple case of developing and building on the original technology. Not so for the AS 80110/30 microwave amplifier, which has been produced to extend...

Technical Feature Low Phase Noise SiGe Voltage-controlled Oscillators for Wireless Applications A low phase noise voltage-controlled oscillator (VCO) is one of the critical circuits in modern telecommunications systems. In recent years, silicon germanium (SiGe) BiCMOS technology has become one of the most promising technologies for VCO designs. This article...

Technical Feature A Varactor-tuned Oscillator with Linear Tuning Characteristic Munkyo Seo, Joo-Yeol Lee and Kyung-Kuk Lee LG Electronics Inc. Seoul, Korea Sangwook Nam Seoul National University Seoul, Korea In certain areas of microwave applications such as FMCW radars, FM modulators and phase-locked loop (PLL) circuits, the system performance is...

Technical Feature Designing a Bluetooth Transceiver in RF CMOS Bob Koupal and Marshall Wang Signia Technologies Milpitas, CA Cory Edelman Agilent Technologies Westlake Village, CA The design of a 2.4 GHz Bluetooth transceiver RFIC in CMOS requires careful verification of key performance criteria at all stages of the design...

Technical Feature A New Type of Amplitude Equalizer for In-band Flatness Improvement There is a growing need in modern communication systems for low cost bandpass filters of small size, high selectivity and flat passband response in order to meet the demands for inter-channel power balance, and to avoid interference....

Technical Feature Intermodulation Products for a Mixer Subjected to a Multi-carrier Signal Applying a multi-carrier signal to a mixer leads to a large range of intermodulation products. To perform a link budget of a multi-carrier transmit-receive system, it is important to predict the location and magnitude of those intermodulation...

Tutorial Externally Induced VCO Phase Noise This article describes the degradation of VCO phase noise due to noise on tuning and supply lines, particularly from tuning source resistance and supply voltage regulators. Dennis Colin Micronetics Wireless Hudson, NH VCOs, especially low noise wideband units, are extremely sensitive voltage-to-frequency converters,...

Application Note Technology and Innovation in Single Layer Capacitors Lambert Devoe and Alan Devoe Presidio Components Inc. San Diego, CA Single layer capacitors have been manufactured for many years for high frequency microwave applications. The simple parallel plate structure has advantages over multi-layer capacitors up to gigahertz frequencies due...

The Commercial Market Loral Skynet Marks 40th Anniversary of Telstar 1 On July 10, 2002, Loral Skynet marked the 40th anniversary of the launch of Telstar 1, the world's first active communications satellite built by Skynet's predecessors at AT&T and Bell Laboratories. Telstar 1 was launched from Cape Canaveral...