Akademik Veri Yönetim Sistemi
Advances in Space Research, 2026 (SCI-Expanded, Scopus)
Unmanned aerial vehicles (UAVs) require compact and lightweight antenna systems capable of supporting multiple mission profiles; however, achieving high isolation and frequency agility within a single structure remains challenging. This paper presents a compact 8-port (4-4) frequency-reconfigurable MIMO antenna designed on a low-cost FR-4 substrate, integrating a neutralization-line-based decoupling mechanism with PIN-diode-controlled radiating elements.The proposed antenna operates in two reconfigurable modes: C-band for UAV telemetry and data transmission, and X-band covering frequency ranges commonly used by SAR and SatCom systems. Measurement results indicate stable radiation behavior across the operating bands. The design achieves a stable peak realized gain of 6.24 dBi, an ECC in the range of 0.005–0.03, and a DG of approximately 10 dB, thereby ensuring reliable MIMO performance under all operating conditions. The ability to switch between frequency bands without hardware modification makes the proposed design a compact and efficient RF front-end solution for multi-mission UAV platforms and adaptive satellite communication systems.