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http://dx.doi.org/10.5515/KJKIEES.2013.24.10.979

Degradation of RF Receiver Sensitivity Due to TVS Diode  

Hwang, Yoon-Jae (School of Electrical and Electronic Engineering, Yonsei University)
Park, Je-Kwang (LG Electronics)
Yook, Jong-Gwan (School of Electrical and Electronic Engineering, Yonsei University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.24, no.10, 2013 , pp. 979-986 More about this Journal
Abstract
In this paper, a TVS diode which is commonly used as a ESD protector in wireless communication devices could cause antenna wireless sensitivity to decrease has been analyzed. When a smartphone doesn't have enough space to place many components, there would be its speaker near antenna area. In order to protect ESD coming through the speaker there also could be a TVS within antenna GND area. Digital audio signal which was sent to speaker and CDMA RF communication signal coupled from antenna was mixed by TVS. And this leakage current running through TVS resulted in decrease of antenna wireless sensitivity. The results of various experiments can be explained using circuit simulation. Following works will give us some insights that can reduce unwanted summation of digital and RF signal due to nonlinearity of ESD protectors.
Keywords
ESD; TVS Diode; Antenna Wireless Sensitivity; Digital Signal; Communication RF Signal;
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