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URN etd-0703106-140516 Statistics This thesis had been viewed 1744 times. Download 21 times. Author Chun-Hua Chen Author's Email Address No Public. Department Communication Engineering Year 2005 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 51 Title LINEAR AND CIRCULAR POLARIZED
INHOMOGENEOUS REFLECTOR SURFACE ANTENNAS
Keyword tapper stack side lobe level partial reflective surface partial reflective surface side lobe level stack tapper Abstract Several techniques are proposed in this thesis to reduce side lobe levels of a partially reflect antenna. Conventionally, partial reflect antenna contains a highly reflective sheet which is located a half wavelength from a perfect conductor (or ground plane). The reflective sheet is constructed by uniformly spaced patch elements and its size is equal to that of the ground plane. In this thesis, we propose an inhomogeneous spaced partial reflect antenna. The size of the reflective sheet may or may not be equal to that of the ground plane.
By these techniques, we found that average side lobe levels are largely reduced within near bore sight direction compared with conventional designs.
In addition to the above mentioned techniques, we also present a stacked structure to further boost the gain of the partially reflect antenna.
Advisor Committee The-Nan Chang - advisor
chien-lun Hung - co-chair
Fu-Lai Chu - co-chair
Files Date of Defense 2006-06-23 Date of Submission 2006-07-03