SUCCESS STORY
Sumitomo Electric and Cadence
Compact GaN HEMT Doherty Amplifier
Using AWR Software
Application
X
Amplifier
Software
X
Cadence
®
AWR Design Environment
®
Sof tware
Por t folio, including:
ɢ Cadence AWR
®
Microwave Office
®
Circuit Design
Software
ɢ Cadence AWR AXIEM
®
Planar Electromagnetic (EM)
Simulator
Benefits
X
Ease of use
X
Speed of simulations
X
High accuracy
X
Proficient suppor t ser vices
Key Challenges
Next-generation 4G/5G telecommunication systems require
power amplifiers (PAs) to operate with high efficiency over a
wide frequency range in order to provide multiband and
multi-standard concurrent operation. In these systems with
increased bandwidth and high data rates, the transmitting
signal is characterized by high peak-to-average power ratio
(PAPR) due to wide and rapid variations of the instanta-
neous transmitting power. Therefore, it is important to
provide high efficiency at maximum output power and at
lower power levels over a wide frequency bandwidth.
Sumitomo Electric designers were tasked with developing
an innovative high-power, wideband Doherty amplifier
covering nearly 1GHz of operation bandwidth at 2.25GHz.
The compactness of the design was of critical importance.
In addition, low impedance levels from the transistor die to
the packaged device gate terminal were required for circuit
matching (Figure 1).
Figure 1: Equivalent circuit of packaged devices
