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In a previous publication, 1 the author introduced a new dual-ridge horn that corrected the pattern problems of the traditional dual-ridge horn antenna. 2 All the parameters of this new horn, shown in Figure 1 , were measured and it was tested for use as an EMC immunity and...

MicroMetrics Inc. , a manufacturer of semiconductor devices for commercial and military communications, announced the expansion of its epitaxial growth and coating services for the semiconductor fabrication market. The newly expanded Londonderry, NH facility now includes seven Gemini Epi reactors. This dedicated business unit supports the growing of three,...

January is a very nice time to be visiting San Diego, CA, as the 2500 attendees of the first annual IEEE Radio and Wireless Symposium (RWS 2006) found as they came in from various parts of the US and overseas. Winter tends to be long and cold for many...

Optimization has been applied to circuit design for decades. IBM pioneered circuit simulation-based optimizer research in the 1960s and ’70s. In the 1980s, the University of California at Berkeley extended the research with more exotic algorithms and interactivity with programs such as DELIGHT and ECSTACY. During the same period,...

The well known and widely used "Termination-VSWR" method, used to measure the reflectivity of an absorber wall in an anechoic chamber, has been considerably modernized with the help of new vector network analyzers (VNA) and personal computers (PC), taking advantage of fast sweepers or synthesizers and of the time-domain...

In its latest Insight report, "Silicon-on-Sapphire Switches for Handsets: Stopgap or Disruptive Technology?," Strategy Analytics , the research and consulting company, evaluated CMOS silicon-on-sapphire (SoS) RF switches and found that SoS has begun to disrupt established approaches to transmit-receive (T/R) switching in multi-mode, multi-band cellular handsets. Peregrine Semiconductor has...

When EM engineers use design and modeling packages they want ease of use, reliability and, most importantly, the ability to design new products that meet the desired purpose quickly and effectively. These were the main considerations when Flomerics developed MicroStripes 7, together with the aim of ‘bringing electromagnetic simulation...

We are very pleased to offer this updated survey of companies providing connectors, cables and cable assemblies. Seventy-four companies responded to our request for information this year, which is an increase from the 68 companies in last year’s survey. In addition, 15 of last year’s participants have updated their...

In the world of RF coaxial threaded connections, too often the efforts of selecting a suitable connector interface, procuring it from a reliable source and manufacturing a high quality assembly are done in vain because the connector has not been tightened to the proper torque value and/or steps were...

The demand for additional integration and high density packaging in circuits for telecommunications, aviation and military applications continues to increase. The result is that components assembled on PCBs and into packages must be reduced in size and made suitable for new assembly techniques such as surface-mount technology (SMT). However,...