A SAW-less LTE transmitter with high-linearity modulator using BPF-based I/Q summing

A SAW-filter-less LTE transmitter based on 65-nm CMOS technology, incorporating a passive quadrature modulator (QMOD) with band-pass-filter (BPF) I/Q summing technique, was developed. The passive operation and the BPF I/Q summing technique, respectively, contribute to low noise performance and high...

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Bibliographic Details
Main Authors: Nakamura, Takahiro, Kitazawa, Naoki, Kohira, Kaoru, Ishikuro, Hiroki
Format: Conference Proceeding
Language:English
Subjects:
high-pass filter
Impedance
Impedance matching
linearity
LTE
Noise
Power generation
quadrature modulator
Radio frequency
Radio transmitters
SAW less transmitter
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Summary:A SAW-filter-less LTE transmitter based on 65-nm CMOS technology, incorporating a passive quadrature modulator (QMOD) with band-pass-filter (BPF) I/Q summing technique, was developed. The passive operation and the BPF I/Q summing technique, respectively, contribute to low noise performance and high input impedance seen from baseband signal, resulting in low receiver-band noise and high linearity of the transmitter. A transmitter using the QMOD exhibits both inspecification receiver-band noise (
ISSN:1930-8833
2643-1319
DOI:10.1109/ESSCIRC.2014.6942103