On Surface Currents in a Polycrystalline Solar Cell Acting as Ground Plane for Microstrip Patch Antennas

TitleOn Surface Currents in a Polycrystalline Solar Cell Acting as Ground Plane for Microstrip Patch Antennas
Publication TypeConference Paper
Year of Publication2008
AuthorsRoo Ons, MJ, Shynu, SV, Ammann, MJ, McCormack, S, Norton, B
Conference NameIEEE AP-S International Symposium on Antennas and Propagation
PaginationSession 431, Paper 4
Conference Start Date05/07/2008
PublisherInstitute of Electronic & Electrical Engineers
Conference LocationSan Diego, CA, USA
Abstract

Previous investigations undertaken by the authors on the use of polycrystalline solar cells acting as ground plane for microstrip antennas shown that parameters such as antenna gain greatly depend on the orientation of the Ag-lines of the solar cell with respect to the patch; the lines could be either oriented in parallel or in perpendicular with the polarization of the radiated field.
This paper focuses on the analysis of the currents in the cavity formed between the patch and the rearside of the solar cell to investigate the antenna dependence on the orientation of the silver grid with respect to the patch.
It is going to be seen that when the thin silver lines are aligned in parallel with the resultant electric field, this set of lines itself acts as a relatively good reflector and therefore the penetration into the lossy silicon is minimal, being the antenna performance close to that of the microstrip patch with copper (PEC) ground plane. But when the Ag-lines are oriented perpendicular to the patch electric field, the most of the field penetrates into the silicon layer towards the aluminium layer of the cell, which is clearly the strongest reflecting element in this cavity, resulting in a degradation of the solar antenna gain performance.

URLhttp://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4619749&isnumber=4618896
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