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The high profile of the space-fed antennas is the main restriction for practical applications. Traditional design method to pursue high compactness of this kind of antenna is to decrease the focus-to-diameter ratio (F/D), but suffers from performance degradation. To address this issue, a small dipole array is chosen as the feed in our design. By employing conjugate field matching (CFM) technology,...
A wideband mechanical beam steering lens antenna was proposed in this paper. Referring to the operating principle of Risley beam steering system, a fixed beam array antenna was utilized to excite the dielectric wedge lens at Ku-band. By controlling the relative rotation between the feed and the lens, the whole antenna system can scan to ±50° in all directions. The whole profile was integrated to minimum...
Reflectarrays and transmitarrays are extremely important in the applications of terahertz (THz) technologies, as they feature merits like high gain and low cost. In this work, a reflectarray and a transmitarray are designed at 300GHz. A 32 × 50 offset-fed wideband reflectarray antenna, based on single-layer elements with a large and linear phase response, shows a fixed beam direction without frequency...
Multiple transmit and receive antennas can increase the capacity, as well as increase reliability in wireless communication. In this paper, we propose a nulling-canceling based detection algorithm that performs selective maximum-likelihood decoding based on result of comparison between symbol estimates with different orderings. If the symbol estimates do not agree, then maximum-likelihood detection...
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