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Beamforming with 1 × N Conformal Arrays.

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This study presents adaptive beamforming for conformal antennas on curved surfaces, crucial for wireless devices. The projection method effectively designs these antennas, enabling robust performance for future wireless applications.

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Area of Science:

  • Electromagnetics and Antenna Theory
  • Wireless Communication Systems
  • Metamaterials and Advanced Antennas

Background:

  • Increasing demand for wireless spectrum access necessitates antennas with advanced capabilities like conformability and adaptive beamforming.
  • Existing antenna designs often struggle to maintain performance on non-planar, flexible surfaces.
  • Microstrip patch antenna arrays are key components in modern wireless systems.

Purpose of the Study:

  • To develop adaptive beamforming patterns for microstrip patch antenna arrays on flexible, conformal surfaces.
  • To investigate the effectiveness of the projection method, incorporating mutual coupling, for designing these antennas.
  • To provide guidelines for designing conformal phased-array antennas with adaptive nulling.

Main Methods:

  • Derivation of array coefficients using the projection method, accounting for mutual coupling between antenna elements.
  • Embedding a linear four-element microstrip patch antenna array onto two deformed conformal surfaces.
  • Validation through theoretical calculations (MATLAB), full-wave simulations (HFSS), and experimental measurements.

Main Results:

  • The projection method successfully generated desired adaptive beamforming patterns on conformal surfaces.
  • Measured results closely matched simulated results, confirming the accuracy of the developed method.
  • Analysis provided new insights into the impact of mutual coupling and surface deformation on beamforming.

Conclusions:

  • The developed projection method enables efficient and robust adaptive beamforming for conformal phased-array antennas.
  • This research paves the way for advanced antennas in cellular and Internet of Things (IoT) devices.
  • The findings support the creation of antennas with multiple beam-forming and adaptive nulling capabilities.