sar measurement system
An automated SAR measurement system for compliance testing of personal wireless devicesfree download An automated specific absorption rate ( SAR ) mea-surement system has been developed for compliance testing of personal wireless devices. Unlike other systems, this system uses a model with a lossy ear-shaped protrusion and the accuracy of this experimental setup has Calibration […]
power sensor
Ultra-Low Power Sensor Design for Wireless Body Area Networks-Challenges, Potential Solutions, and Applications.free download This paper addresses the design challenges in wireless body area networks and gives an overview of recent technological achievements to tackle these challenges. It covers the areas of wireless communication, digital signal processing, sensing and read-out, and A new protocol for […]
signal analyser
A simulink-driven dynamic signal analyzer free download Fourier methods can transform the system response to an input sine wave from a discrete data vector in the time domain into the frequency domain components of magnitude and phase at this excitation frequency. The dynamic signal analyzer described here uses such a Large- signal FET model with […]
anechoic chambers
How rf anechoic chambers workfree download A radio frequency anechoic chamber is a shielded room whose walls have been covered with a material that scatters or absorbs so much of the incident energy that it can simulate free space. Its origins can be traced to efforts to build aircraft which absorbed or scattered Computerised planning […]
spectrum analyzer
A 50MHz-to-1.5 GHz cross-correlation CMOS spectrum analyzer for cognitive radio with 89dB SFDR in 1MHz RBWfree download Spectrum sensing for cognitive radio requires a high linearity to handle strong signals, and at the same time a low noise figure (NF) to enable detection of much weaker signals. Often there is a trade-off between linearity and […]
rf probe
Wideband coplanar waveguide RF probe pad to microstrip transitions without via holesfree download A novel via-less coplanar waveguide (CPW) to microstrip transition is discussed and design rules based on simulations and experimental results are presented. This transition demonstrates a maximum insertion loss of 1 dB over the frequency range from 10 GHz to 40 A […]
signal generator
A complete software-based IF GNSS signal generator for software receiver developmentfree download The recent development of Global Navigation Satellite Systems (GNSS) software receivers has brought a new perspective to receiver design. The first step necessary to use them is to have access to sampled data at an Intermediate Frequency (IF). These sampled data can be […]