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Recently a number of polar transmitters for the multi-mode transmission of Wireless-Local-Area-Network (WLAN) and Bluetooth signals have been proposed. These polar transmitters use envelope modulators based on digital-to-analog converters (DACs) as power amplifiers. Such an approach is very useful when the maximum theoretical efficiency of the power-amplifier digital-to-analog converter (PA-DAC) is...
We present new Gbps orthogonal frequency division multiplexing (OFDM) physical layers and performance evaluations for applications of 60-GHz wireless local area network (WLAN). They are designed to operate in 57-66 GHz unlicensed frequency band with the possibility to use different channel bandwidth and to promise full compatibility to the channel plan that most 60-GHz standard groups have employed...
A dual-mode RF front-end module is designed and implemented for Wi-Fi/WiMAX applications. It consists of a front-end MMIC and a dual-band power amplifier MMIC, both fabricated by 0.5 mum E/D-mode p-HEMT process. The front-end MMIC integrates a single-pole triple-throw antenna switch, two low noise amplifiers, a low pass filter and a diplexer in single chip. Overall module size is compact 7 mm times...
This paper describes the design of a power amplifier (PA) for WLAN 802.11n fabricated in 65 nm CMOS technology. The PA utilizes 3.3 V thick-gate oxide (5.2 nm) transistors and a two-stage differential configuration with two integrated transformers for input and interstage matching. For a 72.2 Mbit/s, 64-QAM, 802.11n OFDM signal at an average and peak output power of 11.6 dBm and 19.6 dBm, respectively,...
This paper introduces a low-power ultra-wideband true root-mean-square power detector with a 0.13-mum CMOS process operating from 125 MHz to 8.5 GHz. The detector utilizes the MOS transistor's square-law characteristic in the strong inversion region to obtain the power information of the input RF signal, and its exponential characteristic in the weak inversion region to realize the linear-in-decibel...
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