Antenna Effect Analysis of Laptop Platform Noise on WLAN Performance
Nowadays, due to increasingly high integration of multi-radios and high-speed dig-ital system, serious platform noise is generated by ever higher speed digital clocking and signaling technologies. There are many sources of interference, such as EMI spectrum from CPU, LCD, and memory, which may be in the form of radiation or conduction emission and thus affect the quality of signal perceived at the transceiver. While encroaching upon the wireless communica-tion band, those noises could result in a significant degradation to the throughput performance of wireless communications. It is very important to analyze the proximity effect on antenna perfor-mance due to different locations and types of antenna. An antenna was used to measure the noise floor of RF systems and examine its performance for different locations on a laptop. The laptop tested and analyzed in this paper has the following modules: CPU (Intel (R) T9400:2.53 GHz) and built-in 802.11a/b/g WLAN module. The measurement result demonstrates the impact of LCD noise on throughput for 802.11g. We also found the sensitivity of the receiver decreases (throughput decreases) as the LCD interference was injected to the communication link between the AP and NIC card. Furthermore, we will also use the different type of antennas for 2.4G band to compare the communication performance, such as antenna efficiency, the radiation pattern, noise floor, for different locations. We will then show the increasing throughput of system by optimizing the design of antennas.
Han-Nien Lin Ching-Hsien Lin Tai-Jung Cheng Min-Chih Liao
Department of Communications Engineering,Feng-Chia University 100 Wen-Hua Rd.,Taichung 40724,Taiwan,R.O.C.
国际会议
Progress in Electromagnetics Research Symposium 2009(2009年电磁学研究新进展学术研讨会)(PIERS 2009)
北京
英文
585-590
2009-03-23（万方平台首次上网日期，不代表论文的发表时间）