Design of L-Shaped Open-Slot Antenna Used in UAV Airborne Communication System

Abstract

According to the communication demands of communication system used in the UAV (Unmanned Aerial Vehicle) communication system, a ladder-shaped open-slotted antenna design is presented. The impedance effects and directional radiation performance of designed antenna are improved with adopting a pair of L-shaped narrow slot and a passive resonator among the antenna structures. The measured results show that the impedance bandwidth of the antenna is about 90%, the frequency range can cover from 3 GHz to 12 GHz, and the antenna has a relative small size just as 22 mm × 24 mm. The antenna is realized through adopting improved ground structure, and its electrical length is increased simultaneously. To improve its impedance matching effect, the ladder structure is adopted in the antenna. The measured results show that the proposed design scheme is useful and effective, the antenna size can be controlled within the size of 22 mm × 24 mm and the good impedance bandwidth can also be obtained, its frequency bandwidth is from 3 GHz to 13.2 GHz, and the designed antenna has good group delay characteristics at the same time.

Flexible Symmetric-Defection Antenna with Bending and Thermal Insensitivity for Miniaturized UAV

“…The flexible antenna, which conforms with the vehicle surface of the UAV, is compact and has good aerodynamic properties [ 38 , 39 , 40 ], especially for operation between users and the base station at low altitude at the applied frequency band of ISM2.4 GHz [ 41 , 42 , 43 , 44 ], as shown in Figure 1 a. The FSDA consists of the bottom symmetric-defection ground, the middle flexible dielectric substrate (PDMS, = 2.65, = 0.031), and the top radiated unit ( Figure 1 b).…”