Composite structures with desire mechanical properties can be tailored to embed microstrip antenna for reducing
aerodynamic disturbance in aerospace systems. This work aims at developing a spectral domain model to analyze
the effect of dielectric overlay on the performance of microstrip antenna embedded in composite laminated
substrates. Analysis shows that antenna performance depends not only on the dielectric overlay but also on the
laminate layer’s electromagnetic property, fiber direction, and stacking sequence. The common belief that the
antenna size will be reduced because of the increase of equivalent permittivity by the dielectric overlay is no longer
valid in composite laminated substrates. Of the eight substrates studied, overlay can, in general, reduce antenna
radiation efficiency; however, it is found to have favorable effect in substrates with some selected electromagnetic
properties and stacking sequence. For example, removing the antenna overlay in [45/-45/-45/45/45/-45]
substrate can be counterproductive.
關聯:
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields 28(2), p.155-163
