Active mixer resolves passive issues
Aug 1, 2004
While ultra-high frequency (UHF) and microwave passive mixers are known to deliver high linearity and signal-to-noise ratio performance, they require...
Microwave absorbers manage military electronics RF interference
Aug 1, 2004
By Jack T. Gear The increased use of microwave electronics by today's military carries with it the increased potential for RF interference. Various types of microwave absorbing materials use either dielectric or magnetic loss to limit RF interference in military electronics equipment....
Ultra-wideband as a Short-Range, Ultra-High-Speed Wireless Communications Technology
Aug 1, 2004
By Ibrahim Haroun, T. Kenny and R. Hafez Ultra-wideband technologies have been proposed to provide ultra-high speed data rates for short-range communications. In the United States, the systems have been approved for use in the frequency band 3.1 GHz to 10.6 GHz. It supports bit rate greater than 100 Mbps within a 10-meter radius. UWB
communications coexist with other wireless networking standards such as 802.11 LAN, 802.16 MAN and WAN....
Alternative approach to a low-cost wideband amplifier
Aug 1, 2004
By Geoff Stokes An alternative approach to the development of a wideband amplifier should take into account the effect of its package and its printed circuit interconnections...
AWR, TSMC jointly develop design platform for RFICs
Aug 1, 2004
To meet the growing needs of the wireless RF integrated circuit (RFIC) developers, Applied Wave Research Inc. (AWR) has announced a corporate agreement...
Hand-held instruments aid shipboard RF measurements
Aug 1, 2004
By Steve Thomas Of all the environments in which microwave measurements are made, those performed aboard Navy ships provide some of the most daunting challenges. In addition...
Improvements continue to keep military ahead of the game
Aug 1, 2004
Ashok Bindra, Editorial Director Since the birth of radio, electronics has played a key role in modernizing the armed forces and keeping the military at the forefront. Consequently, this...
Tiny module is a tri-band tracking system
Aug 1, 2004
Siemens has developed a tri-band tracking system that combines a GPS receiver and GSM/GPRS radio technology into one module. Until now, location-positioning...
Wireless semiconductor market poised for growth
Aug 1, 2004
In a recent report compiled by market research firm iSupply, the overall market for wireless semiconductors grew 22% in 2003. The report covered semiconductors...
Products
Aug 1, 2004
26 GHz to 31 GHz MMIC power amp Mimix Broadband Inc. has introduced a gallium arsenide (GaAs) monolithic microwave integrated circuit (MMIC) four-stage...
Accelerating the Design and Verification Process
Aug 1, 2004
By Greg Jue Several factors must be taken into consideration when creating a signal in
simulation and downloading the simulated signal to an RF signal generator's
arbitrary waveform generator....
Clarifying any misconceptions about RF Design magazine
Aug 1, 2004
Ashok Bindra, Editorial Director By and large, frequencies above the audio band are called radio frequencies (RF). Although the term RF by definition, and I have checked in several text...
Active mixer differential to single-ended IF matching
Aug 1, 2004
By Tom Schiltz While single-ended RF and LO input ports are becoming standard on high
linearity active mixer ICs, integration of the IF output transformer is difficult and
can be undesirable. A discrete balun approach delivers good performance over
a relatively narrow IF bandwidth when compared to a transformer-based IF
matching technique....
WiMAX could be next step after WiFi
Jul 1, 2004
As the WiMAX forum gathers more members and the technology gears up to begin certification and interoperability testing later in the year in conformance...
IEEE approves 802.3ah standard
Jul 1, 2004
The IEEE standards board has unanimously ratifed the 802.3ah standard. This announcement came from the Ethernet in the First Mile Alliance (EFMA) during...
Amplifiers
Jul 1, 2004
Current feedback amplifier National Semiconductor Corporation has launched three high-speed LMH amplifiers intended for portable communications and video...
Pierce-gate oscillator crystal load calculation
Jul 1, 2004
By Ramon Cerda The Pierce-gate oscillator is well recognized by most designers, but few understand how to specify the crystal correctly. The crystal used can be either a fundamental AT-CUT or BT-CUT. A BT-CUT crystal has poor frequency stability over temperature compared to an AT-CUT. This topology uses a parallel crystal and not a series crystal....
Emerging wireless standard ZigBee gains more support
Jul 1, 2004
Airbee Wireless and Link Plus Corp., two Washington-area companies, have announced a strategic partnership for co-developing a series of new products...
Rf Front-End Considerations for Sdr Ultra-Wideband Communications Systems
Jul 1, 2004
By Stéphane Paquelet, Christophe Moy and Louis-Marie Aubert Design an efficient RF front-end for a novel impulse radio signal transmission
with a detection scheme of an ultra-wideband software-defined radio with high
data rate demodulation structure....
Tektronix to acquire Inet Technologies
Jul 1, 2004
Tektronix, Inc. and Inet Technologies, Inc., have signed a definitive agreement for Tektronix to acquire Inet, a global provider of communications software...
