Leaky-wave slotted microstrip antenna

A microstrip antenna comprising:

• at least one dielectric material forming a dielectric layer structure having a first main side;
• at least one antenna structure formed on the first main side;
• a ground plane;
• where the dielectric layer structure is positioned between the antenna structure and the ground plane;
• wherein each of the at least one antenna structure comprises a microstrip conductor that comprises a slot structure;
• and
• wherein for each of the at least one antenna structure, the microstrip conductor and the slot structure mainly extend in the direction of a longitudinal extension wherein the slot structure divides the microstrip conductor in a first conductor part and a second conductor part that extend parallel to each other, where the slot structure defines a plurality of slot parts, each of the slot parts defining a first width and a second width, the second width having a greater dimension than the first width, the first and second widths of each of the slot parts being substantially equal in dimension, the slot parts further defining a slot height measured along the longitudinal extension, a first set of one or more of the slot parts defining a first slot height, and a second set of one or more of the slot parts defining a second slot height, the first and second slot heights differing from one another.