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http://dx.doi.org/10.5515/KJKIEES.2011.22.9.847

A Design of IQ Modulator for Direct Carrier Modulation Systems  

Mun, Tae-Su (Department of Electronics & Communication Engineering, IT Convergence Research Center, Chonbuk National University)
Kim, Phirun (Department of Electronics & Communication Engineering, IT Convergence Research Center, Chonbuk National University)
Jeong, Yong-Chae (Department of Electronics & Communication Engineering, IT Convergence Research Center, Chonbuk National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.22, no.9, 2011 , pp. 847-851 More about this Journal
Abstract
In this paper, a novel IQ modulator that precisely controls the magnitude and phase of input signals is proposed. The proposed IQ modulator consists of low phase deviation attenuators, a splitter, and a combiner. In order to overcome the phase deviation characteristics found in conventional attenuators, a novel phase compensation technique has been adopted and mathematically analyzed. Linear vector arrays along the center point with large magnitude output signal variations in a full $360^{\circ}$ phase control are achieved on a polar plane by the proposed IQ modulator.
Keywords
Attenuation; Low Phase Deviation; Multiple Input Multiple Output System; IQ Modulator; Zero Crossing;
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