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This paper presents design and measurement of a linearly polarized radial line microstrip antenna array (RL-MSAA) with U-slot circular MSAs (C-MSAs). An circular microstrip antenna with U-shaped slot is used as a radiation element of the RL-MSAA. Radiation phase of the U-slot C-MSA is controlled by tuning a radius of the C-MSA and dimensions of the U-slot on the C-MSA; therefore, the desired phase...
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...
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