Effect of Randomness in Element Position on Performance of Communication Array Antennas in Internet of Things

Abstract

As a critical component for wireless communication, active phased array antennas face the restrictions of creating effective performance with the effect of randomness in the position of the array element, which are inevitably produced in the manufacturing and operating process of antenna. A new method for efficiently and effectively evaluating the statistic performance of antenna is presented, with consideration of randomness in element position. A coupled structural-electromagnetic statistic model for array antenna is proposed from the viewpoint of electromechanical coupling. Lastly, a 12×12 planar array is illustrated to evaluate the performance of antenna with the saddle-shaped distortion and random position error. The results show that the presented model can obtain the antenna performance quickly and effectively, providing an advantageous guidance for structural design and performance optimization for array antennas in wireless application.

Beamforming Optimization in Internet of Things Applications Using Robust Swarm Algorithm in Conjunction with Connectable and Collaborative Sensors

“…Due to a variety of reasons including their small size, low cost, ease of deployment (deterministic or random) and simplified transmission-related protocols in terms of medium access channels and routing [3], it has been found that the antenna array is a key technology for a broad spectrum of future IoT applications ranging from weather forecasting or complex industrial plant monitoring to military surveillance [4].…”

“…1. Random deployment whereas the sensors are randomly distributed over a specific area which collaboratively form an antenna array for beamforming purposes which is referred to as virtual random antenna array [4]. The location of each sensor must be considered on its own.…”

Analysis of phased array antenna system via spherical harmonics decomposition

“…Also, antenna calibration quality is impaired by different measurement, and modelling errors such as signal-field distortions originated from non-planar wave-fronts, non-zero relative bandwidth (error or variance emanated from narrowband direction-of-arrival estimators when the sources have non-zero bandwidths), and parasitic reflections of calibration measurement surrounding. The influence of element position error on electromagnetic performance has been discussed and reported [4] using electromechanical coupling. Most literatures [4][5][6] concentrate on system failure with some corrective measures or its reliability and analysis.…”

“…The influence of element position error on electromagnetic performance has been discussed and reported [4] using electromechanical coupling. Most literatures [4][5][6] concentrate on system failure with some corrective measures or its reliability and analysis. However, little or no literature is openly accessible on the crucial failure-tolerant design aspects of an active spherical phased array for spacecraft applications.…”

“…Lot of approaches such as the use of error detection, redundant systems, isolation [4][5][6] etc. were communicated explicitly and used in space systems.…”