A probe tangent to the patch fed stacked microstrip antenna for wide band high gain applications is presented. By employing only two patches with proper fixed ratio and applying the probe tangent to the patch for feeding another patch, a novel feeding antenna is designed with both high-gain (12 dBi) and wide-band [35%, standing wave radio (SWR ≤ 2)] characteristics .In addition, the 2-dB-gain bandwidth is around 25%, which covers the impedance bandwidth. Compared with conventional stacked antennas, the proposed antenna can achieve a wide band high gain performances and has a simple structure of processing as well. Details of the proposed antenna design and experimental results are presented and discussed. Keywords-High-gain antenna, Fed by probe tangent to the patch, Wide-band antenna, Millimeter wave antenna

In this paper, through improving the coupling feeding type method, a new type of feeding that probe tangent to the patch is proposed. This tangent structure introduces the capacitance to the probe which has the inherent sensitivity and offsets the inherent sensitivity of the probe. In addition, this tangent structure generates three similar frequency resonance points, which lead to the antenna element's bandwidth and gain improving. In the design of the antenna array, we add double metal walls on both sides of the antenna element, so radiation efficiency of the antenna element is improved and the mutual coupling of units in the array is suppressed. The design of the antenna element is simulated by electromagnetic simulation software HFSS and verified by the CST software, as well.