COTS continues to serve military needs
Feb 1, 2005
Ashok Bindra, Editorial Director The Department of Defense's (DoD) NxTest initiative was driven by goals to reduce the total cost of ownership of DoD automatic test systems (ATS), cut...
Products
Feb 1, 2005
Gain block MMIC Hittite Microwave has introduced a versatile gain block, monolithic microwave integrated circuit (MMIC) amplifier covering dc to 5 GHz....
Direct modulation radio hardware architectures for 3G communications systems
Feb 1, 2005
By Patrick Naraine The base station transceiver system is one of the most expensive network elements in the wireless network infrastructure and directly impacts the cost of the overall network design and deployment. The requirement for increased capacity and higher data rates will inevitably lead to increased cell deployments. To maintain costs at an acceptable level, telecommunications equipment
manufacturers will continue to seek more cost-effective solutions to their
infrastructure hardware....
Products
Feb 1, 2005
Active Components Bipolar power transistors The PH1090-700B from M/A-Com is an NPN common base Class C pulse power transistor designed for IFF and other...
RF CMOS design kit creates on-chip spiral inductors
Feb 1, 2005
Semiconductor foundry service provider UMC and EDA software supplier Ansoft Corp. have developed a parameterized spiral inductor design kit based on full-wave...
CDMA2000 Design and Performance Requirements
Feb 1, 2005
By Bill Schofield and Brad Brannon Various heterodyne solutions have continued to flourish through incarnations of
transceiver designs, each generation adding new control loops or components to improve the architectures. While communications standards such as CDMA2000 provide challenging performance requirements, the trends are for deep cost reduction, highly integrated solutions and flexibility....
Mathematical basics of bandlimited sampling and aliasing
Jan 1, 2005
By Vladimir Vitchev Modern applications often require that we sample analog signals, convert them
to digital form, perform operations on them, and reconstruct them as analog
signals. The important question is how to sample and reconstruct an analog
signal while preserving the full information of the original....
Making radios smarter for communications
Jan 1, 2005
Ashok Bindra, Editorial Director With widespread proliferation of wireless communications and intensive use of electromagnetic spectrum, the need for smart radios is far greater today...
Low-pass filter achieves high rejection up to 20 GHz
Jan 1, 2005
Implementing a 21-section cascaded Butterworth filter in its proprietary low-temperature, co-fired ceramic technology and combining it with a novel...
Mobile radio data transmission sets a new record
Jan 1, 2005
Siemens researchers have set a world record for mobile radio data transmission: It achieved a capacity of 1 Gbps in real time. That's about 20 times faster...
SDR platform enables reconfigurable direction finding system
Jan 1, 2005
By Jyothsna Rajan A software-defined radio (SDR) transceiver platform is used to implement a
reconfigurable direction finding (DF) system. This article will describe the
intended data flow and data rate requirements of a typical DF system, map the
DF software components to the SDR platform, and demonstrate the availability
of resources for more complex implementations....
Products
Jan 1, 2005
Active Components MMIC mixer Hittite has introduced two MMIC mixers. The HMC144LC4 is a double-balanced MMIC mixer in a leadless SMT package that can...
Semiconductors
Jan 1, 2005
Bipolar CMOS DMOS process PolarFab has added 2.5-m-thick top metal to its PBC4 BCD (bipolar-CMOS-DMOS) process. PolarFab has also expanded the PBC4 standard...
Detecting interfering signals and mitigating them
Jan 1, 2005
By Steve Thomas Interfering signals close to a carrier can be sources of interference that are
difficult to detect. Field technicians must be able to identify and mitigate such
interfering signals that can be less than 1 kHz apart and have a 60 dB difference
in amplitude. The article discusses the type of performance necessary in a test
instrument in order to identify interfering signals and track them down to their
sources....
