Authors: Hsien-Tung Huang, Ruey-Bing Hwang, Senior Member, IEEE
Source: FERMAT, Volume 24, Article 3, Nov.-Dec., 2017
Abstract: As far as a beam-forming system is concerned, the dynamic adjustment of the phase angle on each radio frequency (RF) signal connected to antenna element should be taken into account. In this paper, we report the phase calibration scheme for a beam-forming architecture based on phase-adjustable local oscillator (LO) made of I/Q modulator. One degree phase-shifting resolution was obtained by using the 14-bit analog-to-digital converter. The on-board calibration circuit by detecting the combined power level of the two LO signals under calibration is designed, implemented and, measured.
Index Terms: phase-shifting local oscillator, phase calibration techniques, beam-forming system, array antennas.
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Interferometer-Based Amplitude and Phase Calibration for Beam-Forming Systems