PHD Discussions Logo

Ask, Learn and Accelerate in your PhD Research

Question Icon Post Your Answer

Question Icon

2 years ago in Electrical Engineering By Bindya

In designing metamaterial antennas, we’re always pushing for miniaturization. What’s the real impact on performance when we scale down the unit cell size, and where do we hit fundamental limits?

I'm an RF engineer working on compact antenna arrays. We use metamaterial structures for enhanced gain and directivity, but I'm concerned about scaling. Intuitively, smaller unit cells should allow for a more refined effective medium and a smaller antenna footprint. However, I need to understand the practical trade-offs: how does scaling affect the bandwidth, radiation efficiency, and resonance stability, especially as we approach fabrication limits at microwave or millimeter-wave frequencies?

All Answers (1 Answers In All)

By Trisha Answered 1 year ago

 Use a balanced feed (e.g., differential or balun-fed) to excite symmetrical currents. Ensure perfect structural symmetry relative to the H-plane, and place the antenna centered on and parallel to a ground plane (if used). Even minor asymmetry in feed placement or nearby objects can tilt the pattern.
 

Your Answer