An RF CMOS Pulse Modulator for Wireless Communication Polar Transmitters
Journal
IEEE Microwave and Wireless Technology Letters
Start Page
1
End Page
4
ISSN
2771-9588
2771-957X
Date Issued
2025-07-15
Author(s)
Abstract
This letter presents a 3.5-GHz fast-transient CMOS pulse modulator tailored for the application of wireless communication polar transmitters. The techniques of loop matching and shunt LC desensitization are used to effectuate the modulator’s wideband matching and absorptive characteristics. The measured insertion loss of the modulator is 2.2 dB, and the 3-dB bandwidth is 750 MHz, ranging from 3.03 to 3.78 GHz. The rise time and fall time of the modulated pulses are 0.9 and 0.62 ns, respectively. Tested with a 20-MHz 256-QAM 5G NR signal, the RF polar transmitter using the CMOS modulators can achieve the adjacent channel leakage ratio (ACLR) better than −35 dBc.
Subjects
Efficiency
linearity
mobile communication
polar transmitter
power amplifier (PA)
pulse modulator
SDGs
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Type
journal article