Paper Info
Title
A Low-Noise And Highly-Linear Transmitter With Envelope Injection Pre-Power Amplifier For Multi-Mode Radio
Abstract
A wideband, low noise, and highly linear transmitter for multi-mode radio is presented. Envelope injection scheme with a CMOS amplifier is developed to obtain sufficient linearity for complex modulation schemes such as OFDM, and to achieve low noise for concurrent operation of more than one standard. Active matching technique with doubly terminated LPF topology is also presented to realize wide bandwidth, low power consumption, and to eliminate off-chip components without increasing die area. A multi-mode transmitter is implemented in a 0.13 mu m CMOS technology with an active area of 1.13 mm(2). Third-order intermodulation product is improved by 17 dB at -3 dBm output by the envelope injection scheme. The transmitter achieves EVM of less than -29.5 dB at -3 dBm output from 0.2 to 7.2 GHz while consuming only 69 mW. The transmitter is also tested with multiple standards of UMTS, 802.11b, WiMax, 802.11a, and 802.11n, and satisfies EVM, ACLR, and spectrum specifications.
Year
DOI
Venue
2011
10.1587/transfun.E94.A.592
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES
Keywords
Field
DocType
multi-mode radio, wideband transmitter, active matching, envelope injection
Transmitter,Wideband,Transmitter power output,Radio frequency power transmission,Intermodulation,RF power amplifier,Electrical engineering,Orthogonal frequency-division multiplexing,Mathematics,Amplifier
Journal
Volume
Issue
ISSN
E94A
2
0916-8508
Citations 
PageRank 
References 
0
0.34
7
Authors
7
Name
Order
Citations
PageRank
Shouhei Kousai112718.37
Daisuke Miyashita2729.99
Junji Wadatsumi361.78
Rui Ito4427.53
Takahiro Sekiguchi511.50
Mototsugu Hamada613022.06
Kenichi Okada7497100.11