Microstrip antennas (MSAs) and its arrays are applied to numerous purposes because of their features of small size, low profile, lightweight, and low cost in fabrication [1], [2]. For MSA arrays fed by microstrip lines for high gain use, feeding loss due of the microstrip lines becomes a problem. On the other hand, MSA arrays fed by a radial waveguide (RL-MSAA) are developed for high gain use such as DBS reception because transmission loss of the radial waveguide is very small [3]-[5].
展开▼
