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This paper proposes the use of a modified frequency reconfigurable Reactive Impedance Surface (RIS) for miniaturization of patch antennas. A periodic array of square patches with slot etched within has been used to realize the RIS. The imaginary impedance of the RIS when used as antenna ground plane has been explored to achieve miniaturization. The RIS however uses a thin substrate maintaining low...
This paper presents a 60 GHz CPW-fed patch antenna on multilayer LTCC- and LCP-based materials with new and compact AMC. The proposed antenna structure consists of top three layers of antenna and bottom three layers of AMC ground plane. First, a new and compact three- layer AMC is designed on both LTCC- and LCP-based substrates. The designed AMC is more compact and provides 37.5% higher in-phase bandwidth...
This paper presents a two-layer mushroom-like reactive impedance surface (RIS) and its application to patch-antenna miniaturization. A reactive impedance surface, known as a meta-substrate, has been shown to present the ability to miniaturize printed antennas when serving as the substrate for the antenna. However, the area of conventional reactiveimpedance- surface substrates is usually much larger...
We numerically investigate the performance of cylindrically conformal patch antennas on isoimpedance anisotropic substrates. These substrates are specifically designed to increase the effective (electrical) height without producingsurface waves.
Knowledge of mutual coupling between antennas is of much importance for the design of practical antenna arrays of finite size. This paper constructs a formula for mutual impedance between patch antennas based on the physics of the static near field coupling and of the far field radiation couplings, i.e., the near and far asymptotes. The two asymptotes are then combined to form a synthetic asymptote...
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