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Showing papers in "International Journal of Rf and Microwave Computer-aided Engineering in 2020"










Journal ArticleDOI
TL;DR: This paper presents a focused and comprehensive literature survey on the use of machine learning in antenna design and optimization, covering the different techniques and algorithms applied to generate antenna parameters based on desired radiation characteristics and other antenna specifications.

31 citations


Journal ArticleDOI
TL;DR: Five different cases of monopole antennas are explored with reflector surfaces such as PEC (perfect electrical conductor) and AMC (artificial magnetic conductor) integrated with the rectifier circuit for better improvisement in RF energy harvesting systems.

31 citations


Journal ArticleDOI
TL;DR: The proposed GCHFA is designed by merging Giuseppe Peano and Cantor set fractals based miniaturized hybrid fractal antenna that operates for biomedical applications that is suitable for Industrial, Scientific, and Medical bands of biomedical applications.





Journal ArticleDOI
TL;DR: This article presents a framework for accelerated EM‐driven multiobjective design of compact microwave devices that adopts a recently reported nested kriging methodology to identify the parameter space region containing the Pareto front and to render a fast surrogate, subsequently used to find the first approximation of the Paredto set.

Journal ArticleDOI
TL;DR: An excellent agreement found between measured S‐parameters and the proposed model proves the effectiveness of the proposed approach and excellent prediction ability for a sweeping multibias set and broad frequency range of 1 to 18 GHz.


Journal ArticleDOI
TL;DR: A novel modeling approach that incorporates variable‐fidelity EM simulations into the recently reported nested kriging framework and is validated using a three‐section miniaturized impedance matching transformer with its surrogate model rendered over wide range of operating frequencies.





Journal ArticleDOI
TL;DR: In this article, a multiple-input-multiple-output (MIMO) array antenna integrated with the double negative metamaterial superstrate is presented, where the negative permeability characteristic is created by a strong magnetic field between the complementary unit cells.
Abstract: Multiple-input-multiple-output (MIMO) array antenna integrated with thedouble negative metamaterial superstrate is presented The triangularmetamaterial unit cell is designed by combining two triangular elements posi-tioned in complementary on the same plane at different sizes Such designwith more gaps is used to excite rooms for more capacitance effects to shift theresonance frequency thus enlarging the bandwidth of the MIMO antenna Theunit cell is arranged in 7×7 periodic array created a superstrate metamaterialplane where theCstrayexists in parallel between the two consecutive cells It isfound that the existence ofCstrayand gaps for each unit cells significantlyinfluenced the bandwidth of the MIMO antenna The higher value of thecapacitance will lead to the negativity of permittivity The superstrate plane isthen located on top of the 4×2 MIMO with a gap of 5 mm The integrationresulted in improving the bandwidth to 1245% (565-64GHz) compared toonly 349% bandwidth (591-612GHz) of the MIMO antenna itself Moreover,the negative permeability characteristic is created by a strong magnetic fieldbetween the complementary unit cells to have 1405-dBi peak gain Besidesthat, the proposed antenna managed to minimize the mutual coupling andimprove the mean effective gain, envelope correlation coefficient, and mul-tiplexing efficiency