Affiliations: [a] Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia | [b] Institute of Nano Electronic Engineering, Universiti Malaysia Perlis, Malaysia | [c] Centre of Space Science, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia
Correspondence:
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Corresponding author: M. Samsuzzaman, Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia. Tel.: +60 103683210; E-mail:sobuzcse@eng.ukm.my
Abstract: A circular polarized highly directional S band patch antenna for small
satellite applications has been proposed in this invention. The proposed
antenna comprises of a square ground plane and two circular radiating
patches with annular circular slot fed by a coaxial probe. The circular slot
in the radiating patch is responsible for creating resonance at the S band.
The prototype is can be easily integrated with a small satellite due to the
simplicity of the design. The modification of the circular shape patch by
cutting circular shape slots help to excite the resonance at the desired
frequency. The simulation and the experimental results have a good
agreement. The proposed antenna has achieved an impedance bandwidth of 55 MHz (2.380 GHz-2.435 GHz) and axial ratio (AR) < 3 dB is about 35 MHz
(2.410 MHz-2.445 MHz) in the operating band. The prototype has achieved a gain
of 8.13 dBi at centre frequency of 2.42 GHz. The directional radiation
pattern, circular polarization (CP), and high gain characteristics make the
proposed antenna suitable for small satellite applications.
Keywords: Circularly polarized, CubeSat applications, circular patch, directional antenna, and high gain, slotted
