scholarly journals Measuring superdirective electrically small antenna arrays mounted on PCBs

2015 ◽  
Vol 57 (10) ◽  
pp. 2269-2274 ◽  
Author(s):  
Abdullah Haskou ◽  
Sylvain Collardey ◽  
Ala Sharaiha
Keyword(s):  
Antenna Arrays ◽  
Electrically Small Antenna ◽  
Small Antenna

Capacity‐enhancement in MIMO systems using biomimetic electrically small antenna arrays

2018 ◽  
Vol 12 (13) ◽  
pp. 2001-2006 ◽  
Author(s):  
Mohammad Ranjbar Nikkhah ◽  
Mohammad Ali Panahi ◽  
Hung Luyen ◽  
Hamid Bahrami ◽  
Nader Behdad
Keyword(s):  
Antenna Arrays ◽  
Mimo Systems ◽  
Capacity Enhancement ◽  
Electrically Small Antenna ◽  
Small Antenna

scholarly journals A Convex Optimization Approach for the Design of Supergain Electrically Small Antenna and Rectenna Arrays Comprising Parasitic Reactively Loaded Elements

2021 ◽  
Author(s):  
Apostolos Georgiadis ◽  
Nuno Borges Carvalho
Keyword(s):  
Convex Optimization ◽  
Antenna Arrays ◽  
Convex Relaxation ◽  
Linear Constraints ◽  
Optimization Approach ◽  
Quadratic Constraints ◽  
Electrically Small Antenna ◽  
Optimization Formulation ◽  
Small Antenna ◽  
Array Gain

<div><div><div><p>A convex optimization formulation is provided for antenna arrays comprising reactively loaded parasitic elements. The objective function consists of maximizing the array gain, while constraints on the admittance are provided in order to properly account for reactive loads. Topologies with two and three electrically small dipole arrays comprising one fed element and one or two parasitic elements respectively are considered and the conditions for obtaining supergain are investigated. The admittance constraints are formulated as linear constraints for specific cases as well as more general, quadratic constraints, which lead to the solution of an equivalent convex relaxation formulation. A design example for an electrically small superdirective rectenna is provided where an upper bound for the rectifier efficiency is simulated.</p></div></div></div>

scholarly journals A Convex Optimization Approach for the Design of Supergain Electrically Small Antenna and Rectenna Arrays Comprising Parasitic Reactively Loaded Elements

2021 ◽  
Author(s):  
Apostolos Georgiadis ◽  
Nuno Borges Carvalho
Keyword(s):  
Convex Optimization ◽  
Antenna Arrays ◽  
Convex Relaxation ◽  
Linear Constraints ◽  
Optimization Approach ◽  
Quadratic Constraints ◽  
Electrically Small Antenna ◽  
Optimization Formulation ◽  
Small Antenna ◽  
Array Gain

<div><div><div><p>A convex optimization formulation is provided for antenna arrays comprising reactively loaded parasitic elements. The objective function consists of maximizing the array gain, while constraints on the admittance are provided in order to properly account for reactive loads. Topologies with two and three electrically small dipole arrays comprising one fed element and one or two parasitic elements respectively are considered and the conditions for obtaining supergain are investigated. The admittance constraints are formulated as linear constraints for specific cases as well as more general, quadratic constraints, which lead to the solution of an equivalent convex relaxation formulation. A design example for an electrically small superdirective rectenna is provided where an upper bound for the rectifier efficiency is simulated.</p></div></div></div>

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