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Small-Size Circular Patch Antenna Using a Cross Slot With Unequal Slot Lengths

Journal: International Journal of Scientific Engineering and Technology (IJSET) (Vol.3, No. 6)

Publication Date:

Authors : ; ; ; ;

Page : 830-833

Keywords : Circular polarization; Proximity method; Axial ratio; Cross slot.;

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-Circularly polarized waves can be obtained from patch antennas when a square patch is excited by two feeds, with their inputs having a 900 phase shift. A new, circularly polarized small-size micro strip antenna using a proximity coupled feed method is proposed. A simple configuration based on a cross slot with unequal slot lengths on a circular patch is adopted to realize a small-size element antenna. The proposed antenna has no 900 hybrid coupler for circular polarization. The measured results verify the circular polarization, and the antenna radius was reduce by about 22% by using the slot lengths which are nearly equal to the diameter of the circular patch antenna. Good impedance and axial ratio characteristics have been obtained.

Last modified: 2014-09-29 22:08:56