Short Course

Radome Theory, Design and Measurement Techniques

Thursday – November 5, 2020 – 10:00 am – 4:30 pm

This one-day short course provided an in-depth exploration of radome theory, design principles, and practical measurement techniques. Attendees gained insight into the electromagnetic performance considerations, materials, and testing methodologies essential for modern radome applications.

Short Course Outline & Schedule

Time	Topic
10:00 am – 10:30 am	Introduction to Radome Theory
10:30 am – 12:00 pm	Radome Design Principles & Materials
12:00 pm – 1:00 pm	Break
1:00 pm – 2:30 pm	Measurement Techniques for Radome Evaluation
2:30 pm – 4:00 pm	Advanced Topics & Case Studies
4:00 pm – 4:30 pm	Q&A and Closing Discussion

The short course was included with full symposium registration. Attendees who registered for the full symposium had access to this specialized session as part of the AMTA 2020 Virtual Symposium program.

Radome design sits at the intersection of electromagnetic theory and practical engineering, requiring a careful balance between structural integrity and radio-frequency transparency. Modern radomes must protect sensitive antenna systems from environmental exposure while minimizing signal distortion, reflection, and attenuation across the operating frequency band. The short course offered a dedicated look at how material selection, wall thickness, and geometric shaping influence overall performance. Attendees explored how layered constructions, including sandwich and solid-wall configurations, affect transmission efficiency and beam pointing accuracy. Understanding these trade-offs is essential for engineers working on everything from airborne radomes to ground-based communication shelters, where even small deviations in electrical performance can have significant operational consequences.

Measurement techniques form the backbone of radome validation, bridging the gap between theoretical predictions and real-world behavior. The course examined both near-field and far-field testing approaches, highlighting how each method captures different aspects of radome performance. Practical considerations such as fixture design, alignment, and environmental control were discussed in the context of obtaining repeatable, reliable data. Participants learned how to interpret measured patterns, insertion loss, and boresight error, and how to distinguish genuine radome effects from measurement artifacts. This hands-on perspective is particularly valuable for professionals tasked with qualifying new radome designs or troubleshooting existing installations where performance has degraded over time.

The electromagnetic performance of a radome depends heavily on the properties of the materials from which it is constructed. Dielectric constant, loss tangent, and mechanical durability must all be weighed against weight, cost, and manufacturability. The course addressed how different material families, from traditional fiberglass composites to advanced radome-specific laminates, behave under varying frequency and environmental conditions. Consideration was also given to coatings, rain erosion protection, and lightning protection, all of which influence the electrical signature of the finished structure. By understanding these material-driven effects, engineers can make more informed choices early in the design cycle, avoiding costly rework and performance shortfalls later in the program.

Radome testing extends beyond simple transmission measurements into more nuanced evaluations of pattern distortion and system-level interaction. When a radome is placed over an antenna, it can alter the effective aperture illumination, introduce sidelobe degradation, and shift the main beam direction. The short course covered how these effects are characterized and quantified, including methods for measuring boresight error as a function of scan angle and frequency. Attendees also examined how radome-induced reflections can couple back into the antenna feed, affecting impedance matching and overall system sensitivity. Such insights are critical for applications ranging from radar and electronic warfare to satellite communications, where precise angular coverage and low sidelobe performance are paramount.

The short course brought together instructors with deep experience across industry, government, and commercial testing organizations, offering attendees a well-rounded perspective on radome practice. Beyond the technical content, the session provided an opportunity for participants to engage with experts and peers on the challenges they face in their own work. The format encouraged practical questions and discussion around real-world radome programs, from initial concept development through final qualification testing. For professionals in the antenna measurement community, this type of focused, one-day training reinforces the value of continuous learning and collaboration. It also highlighted the broader mission of the association to advance the theory and application of antenna measurement techniques across a wide range of electromagnetic technologies.