FSS design for dual-band and low profile Fabry-Pérot antenna at Ka-band

Abstract

Fabry-Pérot cavity antennas are a well-known solution to increase directivity. However, manufacturing tolerances tend to negatively influence the antenna performance, particularly as frequency increases. This paper proposes a frequency selective surface design for a dual band Fabry-Pérot cavity antenna (FPCA), specifically for Ka-band, which favors fabrication reliability. The FSS is formed by a single substrate with double-side metallization. As an example 11 FSS elements all tuned for Ka-band operation are designed in order to obtain a different set of directivities at each frequency band (20 and 30 GHz). A prototype was manufactured.Index Terms-Fabry-Pérot cavity antenna, frequency selective surfaces, closed-square loop, feed slots, dual-band, Kaband.

Single-Layer Dual-Band Leaky Wave Antennas Design Methodology with Directivity Control

“…In this work we present a design methodology that has two important assets; it provides flexibility in the design process and it can be scaled to meet the requirements of the operation band of a potential application, maintaining the low profile of a Fabry-Pérot leaky-wave antenna. While in the majority of the examples in literature the multiple band performance was obtained through the reflection coefficient's phase analysis [53], [70], [74] or the characteristic modes' analysis [82], the basis of the proposed methodology is the analysis of the leaky modes with the transverse resonance method.…”