Xidian University (Yang)

Microwave Office and AXIEM software used for the design of a Doherty power amplifier
The contest provided us with a good platform for study and communication. I believe our future study and work will benefit a lot from the experience. Thanks for holding such a meaningful competition and we deeply appreciate the software and technical support AWR provide for us at no charge. We hope there will be other similar AWR competitions in the future.
Hongliang Yang
Student Design Competition Winner
Xidian University (Yang)

This success story provides details about their winning paper, which discussed the use of AWR’s Microwave Office and AXIEM software for the design of a Doherty power amplifier.

University Profile

Xidian University, located in Xi’an, Shaanxi, China, is a key Chinese national university that focuses primarily on electronics and information education and research. The university has been approved by the state to be funded by “Project 211.” As such, it offers a Graduate School, a National Demonstration School of Software, and an IC Talents Training Center. Xidian University is an essential base of IT talents training and high-level scientific research innovation.

The AWR University Program Design Competition

AWR is committed to fostering the careers of future RF/microwave engineers worldwide. Specific to Asia Pacific, AWR hosts Student Design Competitions and recently sponsored one such student design competition at Xidian University in Xi’an, China.

The objective of the competition was to encourage students to become involved in microwave and RF engineering and to apply their knowledge to practical designs using AWR’s highly efficient design methodology. The ease-of-use and powerful technologies integrated into the AWR Design Environment™ sets AWR software apart from others and uniquely positions it for use by students just starting out in the complex world of high frequency design.

Submissions were evaluated on a number of criteria, including originality of the application or the theory, clarity of the presentation, as well as the effective and efficient use of AWR software. Prizes for the competition winners, which included both cash and in-kind software gifts, were awarded.

The Winning Design

One of the two winning teams comprised Hongliang Yang, Bo Yan, and Shenlin Gao. Their winning paper discussed the use of AWR’s Microwave Office and AXIEM software for the design of a Doherty power amplifier.

Student Commentary

The AWR Design Environment gives me a clear and simple impression. The unified data model, seamless integration of circuit and EM (electromagnetic) simulation, ACE™ (automated circuit extract) and iNet™ (intelligent net), are powerful and convenient tools. I like the software, and as I learned more features about Microwave Office, I prefer the software even more. My knowledge about AWR started with Microwave Office. The linear and nonlinear simulation tools helped me a lot with my daily study and work. The powerful layout capacity, accurate and highly efficient EM analysis tools are my favorite parts of the software. I like to perform EM simulation because the field and current reports it provides are the essence of the problem. The AXIEM 3D planar EM analysis tool integrated with Microwave Office makes EM analysis a simple and straightforward process. AXIEM uses the method of moments (MOM) algorithm to solve EM problems. Owing to the special EM EXTRACT function of AWR, circuit designers are freed from the complex modeling task. To perform EM simulation, we simply need to set the material property, the solving frequency, and boundary condition. By comparison with other commercial 3D EM simulation software, AXIEM’s accuracy is comparable and its simulation speed is faster largely due to AWR’s special fast solving technique. Good agreement between simulation results and test results further verified the reliability and high efficiency of AXIEM. From design capture (schematic and layout), to harmonic balance and time-domain simulation, to synthesis and optimization and EM extraction and verification, the Microwave Office design flow makes the design task simpler and more efficient, and saves a large amount of time for designers.

Will I continue to use AWR software for subsequent designs?
My answer is definitely yes. I’ve preferred AWR software since I begin to use it to do my first design. The powerful nonlinear APLAC® harmonic balanced tools, linear simulation function, unified data base, synchronized updates of circuit schematic and layout, accurate EM simulation based on layout, and iNet, quite simply all of these functions drive my interest in the software. It makes my work more efficient. AWR software will be my first choice for design in my future career. I will always support updates of AWR software and try to introduce the excellent software to my colleagues and friends.

What are your thoughts on the competition itself?
The contest provided us (the team) with a good platform for study and communication. We learned some of the industry leading design philosophy and approaches…especially the design method and design flow of RF circuit and system with AWR software. In the course of AWR software training, AWR’s Peter Xu shared many practical examples to illustrate the key features of Microwave Office. We all learned a lot about AWR software and its applications. An introduction to Visual System Simulator™  (VSS) extended our knowledge. And I believe our future study and work will benefit a lot from the experience.

Throughout the contest, by theory analysis, simulation and practice, our professional foundation and engineering experience were enhanced. We really appreciate the opportunity and platform AWR provided for us.

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