The paper presents a compact multiport antenna, with beamforming capabilities and realized gain of 4.31 dBi the size λ/2. antenna allows digital independent control over three parameters: main-beam direction, beamwidth, null-depth. Those parameters can be dynamically adjusted within continuous range, create multiple beams for different frequency channels, simultaneously generate patterns. Due t...

A systematic method based on the Theory of Characteristic Modes (TCM) for finding orthogonal radiation patterns any electronically steerable parasitic array radiator (ESPAR) is described. This can be useful designing single-RF front-end multiple-input multiple-output (MIMO) systems in which utilized as a basis set space modulation (SM) or full multiplexed MIMO systems. The <inline-formula xmlns...

A systematic and general method for obtaining orthogonal far-field radiation patterns using any electronically steerable parasitic array radiator (ESPAR) embedded in a propagation environment with an arbitrary power angular spectrum (PAS) is described. The useful designing single-RF multiple-input multiple-output (MIMO) systems where the can be utilized as basis set beamspace MIMO. utilizes cor...

Accurate estimation of the attitude of unmanned aerial vehicles (UAVs) is crucial for their control and displacement. Errors in the attitude estimate may misuse the limited battery energy of UAVs or even cause an accident. For attitude estimation, proprioceptive sensors such as inertial measurement units (IMUs) are widely applied, but they are susceptible to inertial guidance error. With antenn...

Industrial Internet-of-Things (IIoT) applications require reliable and efficient wireless communication. Assuming dense sensor networks (WSNs) operating in a harsh environment, concept of time-division multiple access (TDMA)-based WSN enriched with electronically steerable parasitic array radiator (ESPAR) antennas is proposed examined this work. The utilized antenna provides one omnidirectional...

A novel direction-of-arrival (DOA) estimation technique, which uses a conventional multiple signal classification (MUSIC) algorithm with periodic signals, is applied to a single RF-port parasitic array antenna for direction finding. Simulation results show that the proposed method gives high resolution (1 degree) DOA estimation in an uncorrelated signal environment. The novelty lies in that the...

Smart antenna (or directional antenna) technology has been developed recently, which can control its antenna beam pattern to a specified direction by software. Medium access control (MAC) protocols using smart antennas, called directional MAC protocols, have the following potentials: higher spatial reuse, larger extension of communication range, less interference and higher total throughput com...

Multi-Antenna communication techniques are an efficient and relatively simple approach for the performance improvement of wireless systems. However, direct application multi-antenna to aerial system is not always feasible due constraints induced by platforms. Reconfigurable intelligent antenna technologies could provide solution these problems thus they considered as ideal candidates adaption i...

A new algorithm for manipulating the radiation pattern of Electronically Steerable Array Radiator Antennas is proposed. A continuous implementation of the Ant Colony Optimisation (ACO) technique calculates the optimal impedance values of reactances loading different parasitic radiators placed in a circle around a centre antenna. By proposing a method to obtain a suitable sampling frequency of t...