Archimedes Innovation examines the principles behind anti-jamming antenna technology, explaining how constructive and destructive wave interference relate to antenna nulling. Read more >>
These interactions produce directional patterns consisting of a main lobe, side lobes, and nulls. Nulling technology aims to align the main lobe with the desired signal while positioning nulls toward interference sources, maintaining an undistorted or minimally distorted main lobe and reducing interference-related degradation of the signal-to-noise ratio.
The article also explores how beamforming uses arrangements of antenna elements to concentrate energy into directional beams. Increasing the number and density of elements across horizontal and vertical dimensions allows narrower beams to be formed, while adjustments to the amplitude and phase of received signals allow them to combine constructively, steering the array’s gain toward a satellite without physically rotating the antenna.
Archimedes Innovation further outlines three beamforming classifications: analog, digital, and hybrid. Analog beamforming adjusts antenna phase by manipulating RF signal weights using phase shifters, while digital beamforming processes antenna weights at the baseband stage. The article examines their respective characteristics and limitations, including analog beamforming’s hardware dependence and capacity constraints, alongside digital beamforming’s accuracy, implementation flexibility, processing requirements, system complexity, and cost.
Read ‘Principle of Anti-Jamming Antenna’ for more information.
