The European journal for the microwave
and
wireless design engineer
December 2005 / January 2006
Mixed
Signal Design Focus Highlights Wireless USB IP for System-on-a-Chip,
WiMax Broadband Capabilities for Simulation, and a Circuit Simulator
Targeting RFCMOS, GaAs and SiGe RF ICs
Discrete
Components and Modules are Being Driven to Deliver Higher Performance
in Smaller Packages With Ever More Features - a Round Up of the
Latest Developments
Integrated
RF Power Amp/Filter Front-Ends for Wireless Handsets
CMOS designers have been integrating a wide variety of functionality
into large ICs for many years. Everyone has seen the incredible
impact of Moore's law on performance and cost in everyday life.
Within a mobile communications terminal, many components have been
either integrated into RFICs or eliminated as direct digital updown
converters have become available. In communications terminals, two RF
components have resisted the pull of integration so far. Filters and
RF power amplifiers.
Eliminating
the Audible "Buzz" in GSM Phones
Today's cell phone printed circuit boards (PCB) are much more complex
and internally "noisy" than ever before, due to added functionality
and less board space. In many cases, the speaker is very close to the
radio-frequency (RF) antenna, and the audio amplifier is closer to
the RF power amplifier section. This means that the components on the
board have to deal with higher levels of RF noise than in previous
generations.
RF-Related
Impairments for Microwave Digital Radios
A single low-cost universal SDH/PDH common radio platform has been
developed to cover the frequency range from 6GHz up to 40GHz. The
radio is designed to be independent of modulation, capacity and
bandwidth. A single radio platform supports modulation from QPSK up
to 256QAM, capacity from 2E1/T1 up to OC3/STM1, and bandwidth from
1.75MHz up to 56MHz. This paper concentrates on design considerations
for general RF related impairments versus various QAM
modulations.
High
Frequency Simulation Software for Component Design Adds Moment Method
Analysis for Large Volumes
Oscilloscope
Software Enables Easy Validation of UWB and WiMedia UWB
Applications
