New design of strip-loaded radial-line slot array antenna including weakly-coupled canceling slots

Radial-line slot-array antennas (RLSA) is a topic of ongoing research since they were first proposed some decades ago. These antennas show some appealing features like its low cost, low profile, and good efficiency levels at microwave/millimeter-wave frequencies, making them attractive to massive production for some civil applications such as TV-DBS. The basic RLSA configuration consists of a set of slot antennas arranged on the upper face of a radial line. The line is usually fed by a probe located at its center