2.4-GHz Power Amplifier with Power Detector Using Metamaterial-Based Transformer-Type On-Chip Directional Coupler

ETRI Journal

关键词: transformer;    metamaterial;    directional coupler;    power detector;    Power amplifier;   

Others  :  1196699
DOI  :  10.4218/etrij.13.0212.0350

【 摘 要 】

This letter presents a power amplifier (PA) with an on-chip power detector for 2.4-GHz wireless local area network application. The power detector consists of a clamp circuit, a diode detector, and a coupled line directional coupler. A series inductor for an output matching network in the PA is combined with a through line of the coupler, which reduces the coupling level. Therefore, the coupler employs a metamaterial-based transformer configuration to increase coupling. The amount of coupling is increased by 2.5 dB in the 1:1 symmetric transformer structure and by 4.5 dB from two metamaterial units along the coupled line.

   

【 参考文献 】

• [1]W.-C. Hue et al., "High-Linearity and Temperature-Insensitive 2.4 GHz SiGe Power Amplifier with Dynamic-Bias Control," IEEE RFIC Symp., 2005, pp. 609-612.
• [2]Q.Z. Hu et al., "A SiGe Power Amplifier with Power Detector and VSWR Protection for TD-SCDMA Application," Int. Conf. Mixed Design Integrated Circuits Syst., 2006, pp. 214-217.
• [3]Y. H. Chow et al., "A 29dBm Linear Power Amplifier Module for IEEE 802.16e (WiMAX) and LTE Applications Using E-Mode pHEMT Technology," IEEE RFIC Symp., 2009, pp. 92-95.
• [4]A. Pallotta et al., "Quad-Band GSM Silicon PA Module on LTCC Embedding a Coupler-Based RF Power Controller," IEEE Int. Microw. Symp., 2007, pp. 163-166.
• [5]S.-W. Yoon and C.-W. Kim, "2.4 GHz WLAN InGaP/GaAs Power Amplifier with Temperature Compensation Technique," ETRI J., vol. 31, no. 5, Oct. 2009, pp. 601-603.
• [6]Y.-H. Chun et al., "High Directivity Directional Coupler Using Metamaterial," European Microw. Conf., 2006, pp. 329 331.
• [7]T.-G. Kim and B. Lee, "Metamaterial-Based Wideband Rat-Race Hybrid Coupler Using Slow Wave Lines," IET Microw., Antennas, Propag., vol. 4, no. 6, June 2010, pp. 717 721.