Sector Antenna Design for Cellular Networks: Challenges and Solutions

Designing base station antennas for cellular systems presents challenges such as physical size constraints, low passive intermodulation requirements, and the need for multiband operation. Recent advances include metasurface antennas and novel low-profile dipole antennas optimized for MIMO systems, achieving improvement through innovative geometries. Current research also addresses electromagnetic transparency and common-mode resonance suppression using interleaved/shared aperture designs, metamaterials, and frequency-selective surfaces. These techniques enable efficient signal transmission while minimizing interference, supporting the development of compact, high-performance multiband antennas.