HSI-TSENG CHOULin DChiu H.2023-06-092023-06-0920220018926Xhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85131715862&doi=10.1109%2fTAP.2022.3177535&partnerID=40&md5=b70b09b02f63b693aa695c96494d961ahttps://scholars.lib.ntu.edu.tw/handle/123456789/632508An antenna design is presented for long-distance transmission in the unmanned aerial vehicle (UAV) application. This antenna is in a dipole configuration but with dual-mode operations of both dipole and monopole mechanisms. The monopole behavior becomes apparent when installed on the UAV platform to provide a large ground. To ensure both modes’ good integration to produce a broad bandwidth, the dipole arms are formed by H-slot loaded microstrips to create a slower phase velocity. The separation between adjacent harmonic resonances can be decreased. This antenna has good vertically polarized radiation and maximum gains near the horizontal plane to provide better long-distance connections. Various combinations of Hshaped slots are applied to examine the bandwidth behaviors. The achieved size is 90 mm, roughly 1/3 wavelengths at 1.25 GHz and 1/4 at 0.8 GHz. The bandwidth is larger than 50%. Numerical HFSS full-wave simulation and measurement results are compared to validate the feasibility. IEEEAutonomous aerial vehicles; Bandwidth; Behavioral sciences; Broadband operation; Dipole antennas; dipole antennas; H-slot loading; Microstrip; Microstrip antennas; Resonant frequency; unmanned aerial vehicles; vertical polarization[SDGs]SDG7Bandwidth; Behavioral research; Dipole antennas; Microstrip antennas; Microwave antennas; Monopole antennas; Slot antennas; Vehicle transmissions; Antenna design; Behavioral science; Broadband operation; Dual modes; H-slot loading; Long distance transmission; Micro-strips; Polarized radiation; Vehicle platforms; Vertical polarization; Natural frequenciesjournal article10.1109/TAP.2022.31775352-s2.0-85131715862