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The authors describe a low profile CPW and microstrip-fed half-circle planar monopole antenna with dual rectangular slit, which has similar radiation pattern properties for Ultrawideband applications. In this case, the inserted dual slit on the monopole also leads to enhancing the wide band impedance. The inserted dual slit on...

Spectrograms are graphs which display signal power as a function of both time and frequency on a single plot. One axis represents time and another, frequency. Colors or grayscale values are used to indicate magnitude. Recent enhancements to the mathematics which are used to produce spectrograms have greatly enhanced...

Orthogonal frequency division multiplexing (OFDM) is a form of digital modulation used in a wide array of communications systems. This paper will explain what OFDM is, why it’s important, where it’s used, and what test instrumentation is required to maintain it. Perhaps we should first explain what is so...

There will be increasing need for high confidentiality, integrity, and authentication for the wide deployment of the next generation of RFID. Beside these issues, focus will also be on avoiding encryption algorithms; which require more complex modulation, to secure communication between RFID’s tags and readers. In this paper, we...

Switch Selection Guide Agilent’s new “RF and Microwave Switch Selection Guide” provides comprehensive information on the company’s entire portfolio of switches. The guide provides an overview of electromechanical and solid-state switches and switch drivers. Characteristic switch parameters such as switching speed, isolation and insertion loss including typical applications and...

Short on RF Engineers? Consider H1B This column advocates for considering non-US professionals to fill in the steadily growing shortage of RF engineers. In addition to presenting the practical and fiscal advantages, this article also highlights the contribution of “imported” engineering talent to securing future domestic jobs. Unlike the...

It all started with the idea of revolutionizing time measurement in motor racing, using a portable lap-timing system. After two years of research, Prof. Dr.-Ing. Holger Heuermann and his colleague Dipl.-Ing. Kai Hanisch successfully tested their microwave transponder-based laptiming system, MicroLap. Unlike conventional systems, Microlap allows for accurate chronometry...

It is likely that femtocells and picocells will form an integrated part of the initial rollouts of Long Term Evolution (LTE) networks, say analysts at ABI Research. These cellular mini-base stations, which offer improved wireless coverage indoors, have been generating considerable interest in mobile wireless markets, and according to...

The 5 th European Radar Conference (EuRAD) will be held from 30 to 31 October 2008 in Amsterdam, the Netherlands, as part of European Microwave Week. The 5 th European Radar Conference is the major European forum to present the current status and future trends in the field of...

ProVision Communications , a wireless video and RF network planning company, has announced the appointment of former Lucent EMEA chief executive David Rogers as its new chairman. The appointment comes at a strategic time for Bristol, UK-based ProVision as it is rapidly developing its business to take advantage of...