Simplifying RF front-end design in multiband handsets
Feb 1, 2008
By Duncan Pilgrim Ruthless competition in the handset market continues to drive manufacturers to search for new opportunities to drive down cost, printed circuit board...
Low additive noise frequency tripler
May 1, 2007
By Bogdan Sadowski Design of a frequency tripler is presented and its noise degradation, due to
the presence of additive noise of the multiplier, is measured and compared to
theoretical limits....
Miniaturized HF direction-finding antenna system is portable
May 1, 2007
By Joseph R. Jahoda By incorporating advanced techniques and an effi cient loop antenna
confi guration, a direction-fi nding antenna array has been achieved, which is
small and portable for 2 MHz to 30 MHz applications....
CAD implementation of DR-based oscillator using non-linear analysis
Mar 1, 2007
By Kamaljeet Singh and Surendra Pal The concept of modeling along with the simple design equations, characterization and implementation of the dielectric resonator puck model in oscillator simulation, are presented....
Removing the interstage transmit SAW in WCDMA
Feb 1, 2007
By Tajinder Manku This article analyzes the trade-offs required for removing the Tx SAW from the transceiver and duplexer sections of the handset....
Upconverting WiMAX mixer provides high IP3
Nov 1, 2006
By Radhakrishna Setty While many new RF capabilities are enabled by sophisticated RFICs, simple structures, such as a double-balanced quad diode mixer, can effectively perform the same signal-processing functions while also exhibiting superior electrical performance and robustness....
Antenna manufacturer establishes presence in India
Oct 1, 2006
More and more manufacturers from the United States are setting up design and manufacturing centers in India. The latest to join this trend is antenna designer and manufacturer Laird Technologies. To further strengthen its proximity and support capabilities to key customers in the south Asian market, Laird has announced plans to open a manufacturing facility in Chennai, India....
How to best marry time-domain system-level verification with frequency-domain RF circuit simulations
Sep 1, 2006
By Ashok Bindra, Editorial Director This article is a discussion based on a panel presented at the IEEE MTT-S International Microwave Symposium in San Francisco, Calif. RF Design posed six questions to six panelists on the topic
of system-level verification of RF circuits and compiled their responses. The panel discusses the pros and cons of various methods that enable system-level verification of RF circuits....
Optimizing mobile handset performance
Sep 1, 2006
By Greg Mendolia Making RF radios in mobile devices "tunable" is not a new development. But, tunable RF technology is seen as too lossy, too large, too expensive or having poor linearity....
Designing and simulating THz wire waveguides using FEM modeling
Aug 1, 2006
By Jason A. Deibel and Daniel M. Mittleman This article outlines the requirments for effective THz waveguides, explains a solution to this engineering dilemma, and shows how finite element method modeling is being used to develop an effective and efficient THz waveguide system....
CMOS RF transceiver chip tackles multiband 3.5G radio system
Apr 1, 2006
By Kiran Konanur Board space and cost are among the concerns for manufacturers of next-generation multimedia, thin-profile mobile phones. With the advent of HSDPA networks, wireless carriers are anxious to capitalize on increased data throughput in these devices. Thus, driving the need for higher integration, robust architectures, and receive diversity in RF transceiver design....
