ANALYSIS TYPE / 02

Radome & Frequency Selective Surface Simulation for Antenna Enclosure Design

Transmission Loss · Angle Dependence · Polarisation

Ansys HFSSAnsys Periodic Structure SolverCST Studio

Overview

Radome / FSS

Radome and frequency selective surface (FSS) simulation evaluates transmission loss, cross-polarisation, and angle-of-incidence effects — enabling optimised enclosure designs that protect antennas without degrading RF performance. Accurate modelling of the radome wall over the full scan angle range ensures the system gain budget is met under all operating conditions, including adverse weather effects such as rain and ice loading that shift FSS resonance and increase transmission loss.

Industries Served

AutomotiveAerospaceDefenseTelecommunicationsRadar Systems

Deliverables

Transmission Loss vs. AngleFSS Bandpass/Bandstop ResponseCross-Polar Level ReportInstalled Antenna Pattern Comparison

Key Aspects

What Radome / FSS Involves

01

Transmission Loss vs. Frequency & Angle

Computing the insertion loss and phase error introduced by the radome wall over the full scan angle range — ensuring the system gain budget is met at all operating conditions.

02

FSS Unit Cell Optimisation

Designing periodic FSS resonant elements — patches, crosses, Jerusalem crosses, or complementary shapes — to achieve bandpass or bandstop responses at target frequencies.

03

Cross-Polarisation & Isolation

Evaluating the cross-polar discrimination degradation introduced by the radome — critical for dual-polarisation and MIMO antenna systems.

04

Rain & Ice Loading Effects

Assessing the shift in FSS resonance and transmission loss increase caused by wet or iced radome surfaces — informing de-icing requirements.

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