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Archive for May, 2013

Nanjing University of Aeronautics and Astronautics Selects AWR Software

Wednesday, May 1st, 2013

UNIVERSITY BACKGROUND

Nanjing University of Aeronautics and Astronautics (NUAA) is one of China’s premier learning and research institutions and has developed into a comprehensive university especially focused on aerospace engineering. Established in 1952, NUAA strives to provide a world-level research and education system for its 24,600 students, 600 of who are international students from over 30 countries.

THE DESIGN CHALLENGE

NUAA was searching for a more user-friendly, integrated alternative to the current set of high-frequency design tools used in the classroom. To objectively evaluate AWR’s Microwave Office® RF and microwave design software, the university chose to redesign an existing compact and high selectivity dual-band, dual-mode bandpass filter for GPS and WLAN applications. The filter was designed using a short, stub-loaded folded resonator with source load coupling. The 3dB fractional bandwidths of the two passbands were about 3.4 percent at 1.57GHz and 9.9 percent at 5.2GHz. Because there was interference between the main signal path and the folded arms of the resonator, it was necessary to generate five transmission zeros near the passband edges and in the upper stopband in order to improve the frequency selectivity and stopband performance.

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Microwave & RF Engineers…Communication is Key!

Wednesday, May 1st, 2013

I recently agreed to co-chair the IEEE MTT-S Women in Engineering (WIE) / Women in Microwaves (WIM) organization. I have long been an advocate for advancing the cause of women in the world of RF and microwave engineering, actually back to my college days at Carnegie Mellon University (CMU) when I was one of only eight women in my EE graduating class of 110. Things have not improved much since then with women representing only 10 percent of IEEE WIE membership in the U.S. today. Asia and Europe fare far better with approximately 40 percent and 20 percent respectively.

Why do we care about this? Women are a key demographic in any market and a valuable resource to our “dwindling pool of resources” within our chosen profession. We need more engineers of either gender and diversity in terms of more women in our field will certainly add a different perspective to ideas and insights, as it’s true that not all minds think alike.

One of the first things any of us can do to contribute to this is to promote awareness. We need to find new and novels ways to encourage women to elect engineering as their career choice. I spoke recently with former WIE Chair Karen Panetta, who helped me clarify that we need to tap into the “wonderment” of our career choice and make it desirable to the younger generations. One way to do that is to highlight not only the successful women in our high-tech field like Yahoo CEO Marissa Mayer or Facebook COO Sheryl Sandberg, but also to talk about how our profession is what empowers the wireless revolution to take hold and thrive. Watching my kids text, chat and clamor for free WiFi access brings home to me how all of this technology—from products to infrastructure—is largely thanks to microwave theory and techniques.

My co-chair and esteemed colleague Dr. Rashuanda Henderson and I are already formulating plans for improving awareness, communications, and a sense of camaraderie. To that end, please make a point to support WIM by stopping by the reception at IMS 2013, Tuesday night from 6-9 p.m. at the Seattle Space Needle, Level 100!

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