Title :
A novel dual band transmitter for WLAN 802.11 a/g applications
Author :
Jeon, Jong Hwan ; Choi, Jae Hong ; Kang, Sung Min ; Kim, Tae Yong ; Choi, Won ; Koo, Kyung Heon
Author_Institution :
Dept. of Electron. Eng., Incheon Univ., South Korea
Abstract :
This paper presents a novel dual band P-HEMT power amplifier/frequency doubler module for 2.4 GHz and 5.8 GHz wireless LAN applications. The module operates as a power amplifier for 2.4 GHz and frequency doubler for 5.8 GHz. The transmitter module has 4.5 dB amplification gain at 2.4 GHz and 3 dB multiplication gain at 5.8 GHz frequency multiplier. At 2.4 GHz band, the 2nd harmonic is about 30 dB lower than the fundamental signal, and at 5.8 GHz band the fundamental and 3rd harmonic are 22 dB lower than the signal. The 2.4 GHz amplifier satisfies the ACPR mask requirement, and the frequency doubler output needs 10 dB ACPR improvement at 11 MHz offset from center frequency by using predistortion linearization. Matlab simulation shows the possibility of digital predistortion to satisfy the ACPR requirement.
Keywords :
frequency multipliers; high electron mobility transistors; microwave power amplifiers; radio transmitters; wireless LAN; 11 MHz; 2.4 GHz; 22 dB; 3 dB; 4.5 dB; 5.8 GHz; Matlab simulation; P-HEMHEMT power amplifier; WLAN; amplification gain; dual band transmitter; frequency doubler; frequency multiplier; multiplication gain; second harmonic; third harmonics; wireless LAN; Broadband amplifiers; Circuits; Dual band; OFDM; Radio frequency; Standards development; Transceivers; Transmitters; Voltage-controlled oscillators; Wireless LAN;
Conference_Titel :
Microwave Symposium Digest, 2004 IEEE MTT-S International
Print_ISBN :
0-7803-8331-1
DOI :
10.1109/MWSYM.2004.1339225
