{'fraction_non_alphanumeric': 0.024410089503661515, 'fraction_numerical': 0.0, 'mean_word_length': 5.684782608695652, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Compact One-Eighth Spherical Dielectric Lens Antenna on a Corner Reflector

In this study, the compact one-eighth spherical dielectric lens antenna on a corner reflector is proposed. The proposed antenna radiates unidirectional pattern suitable for satellite communications, radar and other applications. Generally, parabolic reflector antennas are usually chosen for satellite communications due to high gain, narrow beam-width, and low side-lobe level characteristics. However, the antenna dimensions are usually large and unsuited for installation, for example, on vehicles, aircrafts, ships and modern buildings. The proposed antenna dimension is significantly reduced by using the sectoral spherical dielectric lens together with a virtual source (image source) technique. The corner reflector is employed to create a virtual source. It is found that the effective aperture area of the proposed antenna is increased, where larger effective aperture area provides higher antenna gain. From preliminary study, the proposed antenna size is more compact than the conventional parabolic reflector with the same electrical performances. Thus, it is well suited for satellite communications, radar and other high-gain applications.