Design of an active dual-mode antenna with near hemispherical Field of View coverage

A quad-mode antenna for accurate polarimetric measurements over an ultra-wide field-of-view

“…2(h)]. Analogous to the analysis published in [5], near-hemispherical FoV coverage can be obtained by combining all four modes. Fig.…”

“…1, is realised by integrating a pair of orthogonal dipoles and a monopole fed by a quadraxial transmission line. The new cylindrical configuration reduces the overall height of the quad-mode antenna and allows for a much more symmetrical design, when compared to the printed design in [5]. As depicted in Fig.…”

“…QUAD-MODE ANTENNA In [5] the authors illustrate the feasibility of integrating a dipole element and a monopole into a single antenna fed by a balanced transmission line, and demonstrate that differential and common mode excitations result in typical dipole-overground and monopole radiation patterns, respectively. Based on the same operating principle the quad-mode antenna, shown in Fig.…”

“…While achieving good performance in general, many of these antennas suffer from a limited FoV, as well as common mode resonances which degrade the performance at certain scan angles [3], [4]. To alleviate both these problems, a dual-mode antenna element, utilising both differential and common mode excitations, has recently been proposed by the authors, and shown to have substantial improvement in FoV coverage when compared to conventional purely differential antennas [5].…”

Mixed-Mode Sensitivity Analysis of a Combined Differential and Common Mode Active Receiving Antenna Providing Near-Hemispherical Field-of-View Coverage

“…In wireless communication systems, the combination of a dipole and monopole into a single antenna element provides antenna diversity that can improve the reliability of the system in rich isotropic multipath (RIMP) environments [11], [12]. Furthermore, by combining the CM and DM patterns with arbitrary complex-valued weights, the beam may potentially be steered electronically over the entire hemisphere [13]. This extended scan range is of significant importance for the next generation radio telescopes requiring full sky surveys through the use of wide-scan phased array antenna systems [14], [15].…”