Sumitomo Electric and Cadence
Cadence is a pivotal leader in electronic design and computational expertise, using its Intelligent
System Design strategy to turn design concepts into reality. Cadence customers are the world's
most creative and innovative companies, delivering extraordinary electronic products from chips
to boards to systems for the most dynamic market applications. www.cadence.com
© 2021 Cadence Design Systems, Inc. All rights reserved worldwide. Cadence, the Cadence logo, and the other Cadence marks
found at www.cadence.com/go/trademarks are trademarks or registered trademarks of Cadence Design Systems, Inc. All other
trademarks are the property of their respective owners. 15375 02/21 DB/SA/SS-M-SMTO/PDF
After conducting the
verification of our Doherty
amplifier with several
witnesses (amongst them
non-users of AWR
software), there was no
argument about which
simulation tool came out on
top, especially in terms of
speed and accuracy.
James Wong, Sumitomo Electric
Figure 2 shows its input return loss performance and Figure 3
show the layout of the low-impedance transform network and
related results in AWR Microwave Office software.
Figure 2: Return loss (dB|S11|)
Figure 3: The layout (top) of the low-impedance transform network
and the DC IV curves (bottom)
Solution
The designers chose the AWR Design Environment
platform, specifically AWR Microwave Office circuit design
software and AWR AXIEM planar EM simulator, for this PA
design, because of the software's high rate of first-pass
design success. The fast and accurate AWR AXIEM EM
analysis helped overcome the challenge of using different
high dielectric materials. The device achieved average
efficiencies of 50%-60% for output powers up to 100W and
significantly reduced the cost, size, and power consumption
of the transmitters.
Summary
Sumitomo Electric designers highlighted the simplicity and
accuracy of the simulations, the intuitive user interface,
simulation speed, and excellent support services as
benefits that helped them achieve success with this novel
design. They said, as an example, that a simple matching
network designed in AWR software is different from other
legacy software. When practically verified on hardware
using the same device and built with different networks, the
legacy software required tuning whereas AWR software
was spot on.
