Filter-Antenna Consisting of Conical FSS Radome and Monopole Antenna

TLDR

The study designs and investigates a filter‑antenna comprising a monopole antenna enclosed by a conical frequency‑selective surface radome. A coupled‑resonator spatial filter is employed to create an FSS array with stable performance, and a specific geometric layout constructs the conical radome, enabling integration with the monopole antenna. Simulations and measurements confirm that the filter‑antenna preserves the monopole’s input reflection coefficient and radiation pattern within the passband while reflecting out‑of‑band signals, yielding anti‑interference capability, low RCS, and suitability for military use.

Abstract

A filter-antenna consisting of a monopole antenna and a conical frequency selective surface (FSS) radome was designed and investigated. A coupled-resonator spatial filter (CRSF) was used to design an FSS array with stable performances, and then a specific geometrical layout was proposed to construct a conical FSS radome. We technically investigated the combination of a monopole antenna and the conical FSS radome. Both the simulated and measured results show that the proposed filter-antenna keeps the input reflection coefficient, radiation pattern of the monopole antenna within the designed passband, and reflects out-of-band signals. Such properties of the filter-antenna will exhibit anti-interference capability and low RCS, which can be widely used in military applications.