Open AccessPattern synthesis for multi‐layered perforated dielectric superstrate loaded patch antenna with equal E / H beamwidth
Author(s) -
Yu YinHua,
Zong ZhiYuan,
Wu Wen,
Fang DaGang
Publication year - 2018
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2017.1204
Subject(s) - beamwidth , materials science , dielectric , antenna (radio) , patch antenna , relative permittivity , radiation pattern , permittivity , microstrip antenna , side lobe , optics , optoelectronics , telecommunications , computer science , physics
The pattern synthesis based on the spectral Green's functions for multi‐layered perforated dielectric loaded patch antenna is presented. It is conducted by optimising the dielectric superstrate parameters, i.e. relative permittivity ( ε r ) and thickness. To solve the problem of the optimised ε r unavailable from market, perforated dielectric superstrate (PDS) is utilised. The equivalence between PDS and homogeneous dielectric superstrate (HDS) in spectral domain is investigated and the effective relative permittivity ( ε reff ) of PDS is studied. Moreover, by introducing ε reff , the general optimisation procedure for HDS loaded antenna is also applicable for PDS loaded antenna, which reduces the computational cost significantly. To validate their method, a two‐layer PDS loaded patch antenna with E / H beamwidth equalisation was designed, fabricated and measured. Simulations and measurements show that the synthesised antenna has satisfactory performances over the ITU‐RS.1068‐1994 band from 13.75 to 14 GHz. The half 10 dB E / H beamwidths of 19°/20°, −27 dB cross polarisation and −15.5 dB side lobe level have been achieved.