Ultra-Wideband (UWB) Radar has become increasingly popular in both commercial and defense industries. UWB Radars (whether impulse, LFM, noise, or OFDM-based) are defined as having a bandwidth of greater than 0.5 GHz, or more than 20% of their center frequency, and are regulated by FCC rules that allow UWB technology to coexist with existing radio services without causing interference. They offer several advantages, including high accuracy for target detection, good precision for penetrating radars, and low cost for combining radar and communication systems. UWB Radars can pass through walls and other obstacles for geo-location/positioning, and can support multipath immunity and frequency diversity with minimal hardware modifications.
Cadence released their Allegro16.5 version which provides direct links to Agilent ADS for RF PCB designs allowing designers to transfer schematics or layouts between these 2 tools. Click on this link to get more info.
The Cadence® Allegro® PCB RF Option is a mixed-signal design environment, from schematic to layout with back annotation, proven to increase RF design productivity up to 50%. It allows engineers to create, integrate, and update RF/microwave circuits with digital/analog circuits in the Allegro PCB Design environment. With its rich layout capability and powerful interfaces with RF simulation tools, it allows engineers to start RF design from Allegro Design Entry-HDL, Allegro PCB Editor, or Agilent ADS.
Here is an excellent webinar on LoadPull basics and PA design by NXP for benefit of all PA designers: http://www.eetimes.com/electrical-engineers/education-training/webinars/4214560/The-Load-Pull-Technique-Theory-and-Practical-Application-To-RF-Power-Amplifier-Design?cid=NL_MicrowaveRF&Ecosystem=microwave-rf-design
muRata released their ADS 2011 component library and is available for download at http://www.murata.com/products/design_support/agilent2/index.html
Additionally, Taiyo Yuden has also released their library for ADS 2011. That download is available at http://www.yuden.co.jp/jp/product/sim/comp6.html or click here for the translated english version.
Accounting for dynamic behavior in FET device models
Inaccurate large-signal high-frequency simulation results are most often caused by use of an inadequate non-linear device model. One of the most insightful ways of testing the large-signal high-frequency behavior of a FET is to look at its dynamic response under fast pulse conditions. Similarly pulse i(v) simulation can be used to examine a FET model’s dynamic characteristic, giving vital information on its suitability for a proposed task by showing how necessary dynamic behaviors are modeled. Such critical early insight avoids time consuming and costly problems later in the design cycle.
Read Article: Pub Num: 5990-8706EN
Attend complimentary Webcast on DPD design for Wideband Communication Systems
Requirements for wideband and ultra-wideband wireless communications continue to push the boundaries of state of the art electronics. High power amplifiers are being pushed to higher levels of performance as mobile communications devices continue to operate at higher frequencies and significantly higher bandwidths.
Mobile 4G standards like LTE and LTE-A as well as shorter range WPAN systems like 802.11ac are driving the need for higher performance data converters and measurement systems along with more predictive modeling and design automation tools that can help uncover design performance issues in wideband, digitally pre-distorted systems.
This webcast will explore a model-based design, validate, and test methodology for wideband digital pre-distortion systems, exploring the challenges associated with power amplification of 802.11ac and LTE-A signals.
We will show examples of digitally pre-distorted wideband signals being applied to highly accurate PA device models and actual PA measurements to demonstrate how a model based approach can be applied to the predictive design of such systems
To enroll for this webcast: enroll now