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http://dx.doi.org/10.5515/KJKIEES.2011.22.9.833

Improvement of VSWR Measurement for Various Modulated Signals at 1.8 GHz Band  

Park, Sang-Jin (Department of Electronic Engineering, Incheon University)
Kang, Sung-Min (Ace Technology)
Koo, Kyung-Heon (Department of Electronic Engineering, Incheon University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.22, no.9, 2011 , pp. 833-839 More about this Journal
Abstract
This paper has suggested a technique for measuring VSWR at 1.8 GHz band for various modulated signals. By using directional coupler the power of incident and reflected wave is measured, and in order to minimize the size and cost of the measuring circuit, a SPDT(Single Pole Double Throw) switch is adopted to realize the circuit with just one detector and one A/D(Analog to Digital) converter. MCU(Micro Control Unit) is used to calculate the voltage reflection coefficient and VSWR, and the measured VSWR error has improved by approximately 0.2 with applying a simple bubble sorting algorithm to reduce the measurement error, the MCU process time and load.
Keywords
VSWR; Bubble Sort; Detector; GSM; EDGE; WCDMA; LTE;
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