Electronically Steerable Parasitic Array Radiator Antenna − Principle , Control Theory and Its Applications −
نویسندگان
چکیده
Principle, control theory, and application of the ESPAR (Electrically Steerable Parasitic Array Radiator) antenna are introduced. A typical ESPAR antenna consists of monopole or dipole elements, one of which is the radiator (fed element) and the others are the parasitic radiators with variable reactance devices loaded on them. It can provide a lower-cost solution as an adaptive array antenna or angle diversity antenna, since it needs only a single receiver circuit. ESPAR antennas can be applied to adaptive beam formers, diversity receivers, and DoA (Direction of Arrival) finders. This paper shows the principle of ESPAR antenna from the view point of radio system design and applications.
منابع مشابه
Capacity Enhancement of Ad Hoc Networks using a New Beamforming Scheme Based on ESPAR
This paper proposes a new smart antenna beamforming scheme based on electronically steerable parasitic array radiator (ESPAR). The proposed method is capable of providing better capacity compared to the conventional ESPAR. The termination of each antenna element in this structure comprises a PIN diode in addition to a varactor. Using PIN diode besides the varactor provides more degrees of freed...
متن کاملInterference Cancellation Using Adaptive Beam Forming for 3 D Beam Steering
We have proposed design of ESPAR (Electronically Steerable Parasitic Array Radiator) antenna that is capable of electronic beam steering in order to avoid interference, null is placed in direction of interference source whereas maxima is placed in direction of desired signal source. Paper includes formulation of mathematical model, simulation and later designing of ESPAR antenna capable of dyna...
متن کاملCompact Array Antenna: Omni-, Sector, and Adaptive Modes of Compact Array Antenna
Three working modes, omni-, sector and adaptive modes, for a compact array antenna are introduced. The compact array antenna is an electronically steerable parasitic array radiator (Espar) antenna, which has only a single-port output, and carries out signal combination in space by electromagnetic mutual coupling among array elements. These features of the antenna significantly reduce its cost, ...
متن کاملAnt Colony Optimisation-based radiation pattern manipulation algorithm for Electronically Steerable Array Radiator Antennas
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...
متن کاملA Structural Parameter Based Modification of Energy Conscious ESPAR Antenna System through Optimization for WLAN's Dual-Band Operability
Phased array antenna’s radiation pattern can be electronically controlled, which makes them relevant solution for multipath interference. Electronically Steerable Parasitic Array Radiator (ESPAR) antenna systems are part of the family of phased array antenna under the umbrella of aerial beamforming antennas. Generally ESPAR antenna system design considers the quarter wavelength approach. In pra...
متن کامل