This article presents the design of a dipole antenna structure in combination with a square electromagnetic band gap (EBG) to monitor the children trapped in cars using a 750 MHz frequency band which responds the most to human movement detection. The antenna structure was designed on a copper plate with a thickness of 0.297 mm and polyester mylar film baseplate with a thickness of 0.3 mm and dielectric value of 3.2. By design, the dipole antenna had a size of 201.56 × 12.5 mm 2 and 18 × 5 units square electromagnetic band gap (EBG) of size 254.64 × 71.86 mm 2 . The results of the measurement showed that the bandwidth impedance in the operating frequency range was 4.78% (735-771 MHz) with a gain of 6.3 dBi. There was an omnidirectional signal transmission. The dipole antenna had the best distance between the EBG plates of 30 mm. When being examined at a distance of 500-1,600 mm, it was the most effective at an average signal strength of approximately 0.032 mW every time there was movement of a human body in the car.