Abstract: A vehicle radar detection angle adjustment system and angularly adjustable radar thereof are provided. The system comprises a transmission unit, a processing unit, and a receiving unit. The transmission unit generates a radar beam according to an operation frequency. The processing unit, by the adjustment of the operation frequency, changes a dip angle of the transmission of the radar beam from the transmission unit, and generates a feedback signal after receiving the radar beam through the receiving unit. The processing unit is electrically connected with the receiving unit for receiving the feedback signal, so as to compare the beam frequency of the received feedback signal, and select an operation frequency corresponding to the radar beam having the predetermined energy. Therefore, the radar beam is launched at an optimal angle.

Abstract: A symmetric leaky wave antenna includes a dielectric substrate, an electric wall, and two reflection bore arrays. The dielectric substrate has a first and a second metal layers disposed on two opposite faces thereof. The first metal layer has a feed end and two travelling wave sides. The electric wall is disposed between two travelling wave sides, with the two travelling wave sides symmetrically disposed with respect to the electric wall. The two reflection bore arrays are symmetrically disposed along the two travelling wave sides, respectively, with the electric wall arranged at a central line between the two reflection bore arrays. The two reflection bore arrays pass through the first metal layer, the second metal layer, and the dielectric substrate. The reflection bore array and the electric wall reduce the leakage rate of the electromagnetic wave, thus increasing the gain value of the antenna.

Abstract: A symmetric leaky wave antenna includes a dielectric substrate, an electric wall, and two reflection bore arrays. The dielectric substrate has a first and a second metal layers disposed on two opposite faces thereof. The first metal layer has a feed end and two travelling wave sides. The electric wall is disposed between two travelling wave sides, with the two travelling wave sides symmetrically disposed with respect to the electric wall. The two reflection bore arrays are symmetrically disposed along the two travelling wave sides, respectively, with the electric wall arranged at a central line between the two reflection bore arrays. The two reflection bore arrays pass through the first metal layer, the second metal layer, and the dielectric substrate. The reflection bore array and the electric wall reduce the leakage rate of the electromagnetic wave, thus increasing the gain value of the antenna.