A circularly symmetric high-impedance surface (HIS) is used as a ground plane in the
design of a low-profile two-arm spiral antenna. It is shown through simulations that an HIS …

A wideband absorbing metasurface is proposed to improve the circularly polarized response
of a 1–18 GHz low-profile Archimedean spiral antenna. The metasurface consisting of …

An antenna configured to receive radiation at global navi gation satellite system (GNSS)
frequencies includes a dielectric substrate, a circular patch overlaying the dielectric …

An antenna includes a dielectric substrate, a circular patch overlying the dielectric substrate,
and a metamaterial ground plane. One or more antenna feeds are coupled to the circular …

Conformal thermal protection system (TPS) is widely used to protect embedded antennas of
hypersonic vehicles in high-temperature environments. An equivalent analytical equation for …

In this letter, the maximal achievable bandwidth of an Archimedean spiral antenna above a
reflector is investigated. This bandwidth is defined by the frequency range where the gain in …

In this study, two low-profile wideband spiral antennas that are backed by Circular Artificial
Magnetic Conductors (C-AMC) are proposed for V/UHF bands. Rather than using a C-AMC …

The aim of the present contribution is to show that metasurfaces such as reactive impedance
surfaces (RIS) and artificial magnetic conductors can be efficiently used in the design of low …

An antenna configured to receive radiation at global navigation satellite system (GNSS)
frequencies includes a dielectric substrate, a circular patch overlaying the dielectric …

ABSTRACT A new low profile broadband directional spiral antenna design on a planar EBG
structure is introduced which is suitable for aircraft structural integration. The proposed …