The invention provides a multi-beam antenna based on a one-dimensional
microwave planar lens and a double-tapered-
slot antenna array. The multi-beam antenna is formed by a double-tapered-slot antennaarray (1) and a one-dimensional
microwave planar lens (2). The one-dimensional
microwave planar lens is formed by four
layers of artificial electromagnetic material surfaces (3) where patterns servingas phase shift units (8) are printed, and fixed columns (4). The double-tapered-
slot antenna array (1) is formed by double-tapered-
slot antenna units (9) and is fixed on an
organic glass backboard (7). The antennae are fed by substrate integrated waveguides (6), and can be integrated and connected with other microwave circuits. The one-dimensional microwave planar lens (2) is connected with the
organic glass backboard (7) through long nylon support columns (5). The
radiation phase center line of the double-tapered-slot
antenna array (1) coincides with the
focal line of the one-dimensional microwave planar lens (2), and an optimal focusing effect is reached. According to the invention, a high-
gain wide-angle spatial scanning function can be achieved, the multi-beam antenna is high in integrated level, simple to manufacture and low in cost.