Dual Circularly Polarized Concentric Array Radial Line Slot Antenna fed by Rotating modes from Front and Back Sides for Satellite Application
نویسندگان
چکیده
Radial line slot antennas (RLSAs) are well known as high-efficiency planar antennas in high-gain region for the circular polarization [1]. Figure 1 shows the structure of a general RLSA. A radial waveguide is composed of two parallel circular metal plates. An electromagnetic power is fed from the center and excites a slot array on the top plate. To obtain a pencil beam, the radiating elements are arranged spirally for in-phase excitation. Originally, RLSAs are designed for DBS reception around the frequency range of 12 GHz band. Recently, a lightweight and low profile RLSA is practically used on a Venus climate orbiter AKATSUKI [2] using a honeycomb structure in the radial waveguide as shown in Fig. 2 [3]. AKATSUKI was launched in May 2010 from Japan.
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