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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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2.4-GHz Power Amplifier with Power Detector Using Metamaterial-Based Transformer-Type On-Chip Directional Coupler

  • Dang, Trung-Sinh (Department of Electronics and Radio Engineering, School of Electronics and Information, Kyung Hee University) ;
  • Tran, Anh-Dung (Department of Electronics and Radio Engineering, School of Electronics and Information, Kyung Hee University) ;
  • Lee, Bomson (Department of Electronics and Radio Engineering, School of Electronics and Information, Kyung Hee University) ;
  • Yoon, Sang-Woong (Department of Electronics and Radio Engineering, School of Electronics and Information, Kyung Hee University)
  • Received : 2012.08.13
  • Accepted : 2012.10.04
  • Published : 2013.06.01
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Abstract

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.

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References

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  1. A 60-GHz power amplifier design with on-chip tunable load-matching network and power detect in 90-nm CMOS : POWER AMPLIFIER DESIGN AND POWER DETECT vol.12, pp.1, 2013, https://doi.org/10.1002/tee.22354