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In this paper, we propose a compact single-fed corner arc-truncated square patch antenna with T -diagonal slot and periodically defected ground (PDGS) plane for X band and mm-wave CubeSat applications. A square patch antenna printed on a grounded FR4 slab is used as the building block. Furthermore, its performance is enhanced in terms of impedance bandwidth by adding periodically circular slots in the ground plane to obtain ultra-wideband characteristics. Dual circular polarization, at two resonant frequencies of 10 and 25.6 GHz is achieved by loading the patch with a T-diagonal slot and truncating the corners in an arc shape. Its main features are dual resonance at 10 GHz and at 25.6 GHz, dual circular polarization, ultra-wide band characteristics as well as its compact size of 0.5λ0× 0.5λ0× 0.058λ0 at a resonant frequency of 10 GHz.
In this paper, we propose a wideband microstrip patch antenna for Ka-band CubeSat applications. A square patch antenna printed on a grounded FR4 slab is used as the building block. Furthermore, its performance is enhanced in terms of impedance bandwidth by adding a parasitic element close to the radiating edge of the main patch and by adding slots across the non-radiating edges of the patch to further improve the gain performance. A wide -10dB impedance bandwidth of 21% as well as a -3dB gain bandwidth of 35% across the Kaband were achieved. The antenna presents excellent cross polarization discrimination performance in the E-plane with a maximum gain of 7dBi at 28.3GHz.
This article presents a compact wideband high gain patch antenna for CubeSat. The proposed metal-only antenna mainly consists of an upper patch, a folded ramp-shaped patch and shoring pins connecting the antenna with the ground plane. By adjusting the lengths and widths of two arms of the upper F-shaped patch, a second resonant frequency is generated, and hence, the −10 dB bandwidth is increased. Moreover, the effect of arms’ lengths and widths on reflection coefficients, operating frequency and bandwidth is presented. To validate the design and the simulation results, a prototype metal-only patch antenna was fabricated and tested in a Chamber. A good agreement between the simulated and measured results is achieved. The measured results show that the fabricated prototype achieves a −10 dB bandwidth of 44.9% (1.6–2.7 GHz), a small reflection coefficient of −24.4 dB and a high efficiency, i.e., 85% at 2.45 GHz. The radiation performance of the proposed antenna is measured, show