Most of the the MTT Technical committees have identified technical experts who are available to provide lectures for local chapter meetings. The lecture topics and speakers are listed below. Each TC listed is also linked to speaker contact information as well as a brief abstract of the available talks. Limited funding is available through the MTT-Society for speaker support of members of the Speakers Bureau.
Dr. Christopher P. Silva
The Aerospace Corporation
El Segundo, California
State-of-the-Art Time-Domain Measurement and Modeling Techniques for Nonlinear Components and Systems
Abstract: This presentation introduces and describes new and highly accurate time-domain measurement and modeling techniques applicable to nonlinear communications components and systems with bandwidths ranging to several GHz. An overview and comparison of time-domain versus frequency-domain measurements as they pertain to nonlinear components and systems will first be given. The development of baseband time-domain measurement techniques and system will next be covered that provides state-of-the-art measurement accuracies of time-domain waveforms critical to design verification, model construction/validation with operational modulated signals, and system troubleshooting. A survey of some common frequency-domain blackbox modeling approaches will then be described, followed by the introduction of a new systematic approach, called the poly-spectral method, that is based on the time-domain input/output measurements involving operational modulated signals. A more detailed summary of this talk is available upon request.
Transmit/Receive Modules for Phased Array Antennas
Abstract: Phased array antennas provide a significant improvement in revisit rate in comparison to mechanically rotated antennas. This is of particular importance for RADAR applications, and phased array antennas are typically utilized for high performance RADAR applications of current interest. Transmit/receive (T/R) modules play a significant role in determining the performance, reliability, and cost of a phased array antenna. T/R modules also encompass a diverse set of technologies including semiconductors, packaging, and automated assembly and also present significant technical challenges. This presentation will discuss performance, cost, and reliability challenges associated with T/R modules along with associated emerging technologies.
University of Kiel
Technische Fakultat, Germany
Tel: +49-431-880-6150 E-mail: email@example.com
Microwave Sensors for Industrial Applicattions
Abstract: Microwave sensors find a continuously increasing number of applications for in-line sensing of materials properties and industrial process control. The first part of the talk will focus on the implantation of the latest two-parameter microwave sensors for the rapid determination of material properties. Two classes of two-parameter sensors will be presented. In the second part of the talk multi-parameter sensors will be introduced. With such sensors, dielectric spectra of materials are interrogated over wide frequency ranges at distinct spot frequencies. The most advanced sensors of the latter kind working either in frequency domain or in time domain, and based on ultra-wideband (UWB) bandwidths, will be shown and special applications will be presented.
Johns Hopkins University
Applied Physics Laboratory
Hamburg, USAbr> Tel: +1-240-228-4203
Recent Advances in Microwave and Millimeter-Wave Remote Sensing for Security Applications
Abstract: Microwave and millimeter-wave remote sensing techniques are fast becoming a necessity in many aspects of security as it becomes more difficult to counter new threats. The requirement for faster detection of objects and humans, improved spatial resolution in imaging, and more precise classification demands the use of novel sensor applications. This talk focuses on recent developments in remote sensing for security, and highlights two recently developed techniques: human micro-Doppler radar detection and millimeter-wave interferometric imaging.
Micro-Doppler refers to the frequency sidebands imparted by the motion of non-rigid objects, such as a moving human body, on the scattered radar signal. By analyzing certain aspects of the micro-Doppler signature, researchers have been able to discriminate humans from vehicles and animals. Much work has also been done in determining human activity from micro-Doppler signatures, which may be used to assess intent and thereby classify potential threats. The basic theory of human micro-Doppler detection will be discussed in this talk, and simulations and measurements will be presented.
Millimeter-wave remote imaging systems, both passive and active, have been shown to successfully detect weapons and other contraband hidden beneath clothing. While most systems rely on mechanical scanning apertures, the use of interferometric imaging has recently been investigated. Initially developed in the radio astronomy and satellite remote sensing communities, interferometric processing can provide images of equivalent quality to filled apertures while using sparse arrays. In addition to reduced aperture area, interferometric imagers require no scanning and are easier to integrate than fully populated phased arrays. This talk will explain the theory behind interferometric imaging, and will describe the effect of implementing various antenna geometries. Recent work from researchers in the field will be reviewed.