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Talk · International Conference on Electrical, Computer and Energy Technologies · July 1, 2026

X-Band Series-Fed Microstrip Antenna Array for CubeSat

Beibit A. Karibayev, Guangwei Yang, Timur A. Namazbayev, Aidana Yessentaeva, Nurlykhan Raulyev, Amirkhan A. Temirbayev

Amirkhan Temirbayev
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Abstract

This paper proposes a concept for placing a highgain X-band microstrip antenna array on the backside of a deployable CubeSat solar panel. In many missions, particularly those focused on Earth observation, this surface is typically not used for the placement of functional elements, which makes it a promising location for antenna system integration. A fourport, series-fed microstrip array with a 14 × 4 configuration (56 square patch elements) is designed and numerically analyzed on an RO4350 substrate$\left(h=1.52 \text{mm}, \varepsilon_{r}=3.66\right)$. According to the numerical results, the resonant frequency is 8.16 GHz, while impedance matching better than -10 dB is achieved over the 8.10-8.22 GHz band (approximately$\mathbf{120 MHz}$bandwidth), with a minimum$\left \vert S_{11}\right \vert$of about -32 dB and VSWR$\leq 1.05$. The radiation characteristics at 8.16 GHz demonstrate a maximum realized gain of approximately 22.8 dB and a narrow main beam with$\mathbf{H P B W} \approx 7.1^{\circ}$, while the sidelobe level is around -11 dB. The obtained results confirm the suitability of the proposed array for onboard X-band CubeSat radio systems requiring high gain and narrow beamwidth.

Antenna Design and AnalysisAdvanced Antenna and Metasurface TechnologiesMicrowave Engineering and Waveguidesmicrostrip antenna arrayseries-fed antennaX-band

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