Enhancement of elevation angle for an array leaky-wave antenna

A new design for array leaky-wave antenna to achieve high elevation angle and obtain high radiation pattern on boresight is proposed in this study. Two half-width microstrip leaky-wave antennas are placed horizontally and used one fed probe between them. The other side of the half-width used lumped element (matching load 50 ohm). An array of vias was used to connect the radiation element with the ground plane to make the microstrip line work in the first high order mode. The main beam direction can be changed by control the reactance of the microstrip line with the free edges of radiation elements and the ground. This controlling led to the use of two vertical vias array alone the radiation element of each antenna. The simulated result produced a high matched bandwidth of the array of 800 MHZ (4.2-5) GHz. The direction of the main beam scanning towards in boresight with maximum gain 12.9 dBi. The elevation angle can be scanning between 22 degrees to 65 degrees. The proposed antenna is promising to the C-band applications.