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Electrical and electronic engineering, Communication engineering and systems
The paper demonstrates how a modulation constellation can be used to steer the radiation pattern of a reconfigurable omnidirectional circularly polarized antenna. The proposed approach offers the benefit of digital beamforming while using a single antenna: the steering can be executed by low frequency electronics and independently for each frequency channel. In the proposed study, the antenna is excited by a signal generated by two I/Q modulators. By appropriately changing the I and Q components, a phase shift is generated which effectively steers the radiation pattern. The results were achieved using cosimulation between CST Microwave Studio and CST Design Studio.
A. Narbudowicz, M. J. Ammann, and D. Heberling, (2015) On Pattern Reconfigurable Antennas Steered by Modulation Scheme, European Conference on Antennas and Propagation - EuCAP, Lisbon, Portugal, European Association on Antennas and Propagation, 12/04/2015