Publication: Analysis of rf-to-voltage power detector for outdoor application
Date
2009-04-01
Authors
Ng, Gua Bin
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Abstract
This is a dissertation regarding the analysis of RF power detector for outdoor application. RF power detector is an apparatus provided for detection of the output power from an RF power amplifier for purposes of controlling the output power. It is important in wireless communication system since each system has a specific power regulation and strength. This leads to the need for selectivity and good control of the output signal’s level. This became a fundamental issue in the design of any communication system. Therefore, AGC circuits become an important system especially for any device or system where wide amplitude variations in the output signal could lead to a lost of information or to an unacceptable performance of the system. Since there are various types of power detector available in the market, logarithmic amplifier was utilized to be implemented in AGC circuit after considering some factors. Before implementing on practical environment, analysis on log amp and AGC circuit is done by using ADS software. After that, the AGC practical circuit is presented and analyzed on breadboard according to the simulation circuit. From the analysis, the performance of AGC practical circuit is better in between 500 kHz and 1 MHz frequency range with a 40dB dynamic range.