Premium
Rapid redesign of multiband antennas with respect to operating conditions and material parameters of substrate
Author(s) -
Koziel Slawomir,
Bekasiewicz Adrian
Publication year - 2020
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.2723
Subject(s) - substrate (aquarium) , antenna (radio) , microstrip antenna , microstrip , patch antenna , reliability (semiconductor) , materials science , inverse , computer science , multi band device , scaling , permittivity , electronic engineering , dielectric , acoustics , optoelectronics , engineering , physics , mathematics , telecommunications , geometry , power (physics) , quantum mechanics , oceanography , geology
This work addresses geometry parameter scaling of multiband antennas for Internet of Things applications. The presented approach is comprehensive and permits redesign of the structure with respect to both the operating frequencies and material parameters of the dielectric substrate. A two‐step procedure is developed with the initial design obtained from an inverse surrogate model constructed using a set of appropriately prepared reference points and the final design identified through an iterative correction procedure. The latter is necessary in order to account for limited accuracy of the surrogate. The proposed approach is validated using a dual‐band microstrip patch antenna scaled over wide ranges of operating frequencies (1.5‐2.5 GHz for the lower band and 5.0‐6.0 GHz for the upper band), substrate thickness (0.7‐1.5 mm), and substrate permittivity (2.5‐3.5). The redesign cost corresponds to only up to three electromagnetic simulations of the antenna at hand. Reliability of the process is confirmed through experimental validation of the fabricated antenna prototypes.