Rex Frobenius has been working at Besser Associates for over 20 years, where he is VP of Engineering and co-owner. To date he has presented nearly one hundred courses to over one thousand students in the United States, Europe, and Asia. His main focus has been course development for linear RF circuit design and test and measurement courses, with his latest project having been the online RF Technology Certification program. He has been the co-author of several articles and has co-authored the text "RF Measurements for Cellular Phones and Wireless Data Systems" with Al Scott. Working for Besser Associates has given Rex the unique opportunity to be mentored by many of the industry's leading engineers including company founder Les Besser. He received his BSEE from UC Davis and also has a BA in Rhetoric from UC Berkeley, which makes him uniquely qualified to develop and present materials for training in the RF industry. Rex has developed several Java-based RF-related utility applets which are featured in Besser training courses and available for free on the Bessernet.com website.