Antenna-in-package for 60 GHz - radiation efficiency measured?

Antenna-in-package at 60 GHz is compact, but package losses eat efficiency. What radiation efficiency have you measured in a real product?

60 GHz antenna-in-package radiation efficiency is mostly package and feed loss once the radiator itself is competent; free-space chamber numbers without the real stack are often optimistic.

What people actually measure:
1. Report efficiency with the production package, solder attach, and nearby metal / shield - not only the bare AiP on a test coupon. BGA balls, mold, and lid slots routinely eat several tenths of a dB to more than 1 dB.
2. Separate radiation efficiency from realized gain / mismatch: a good S11 with poor efficiency usually means dielectric / conductor / feed loss inside the package.
3. Compare OTA (chamber or quiet zone) against a well-calibrated reference; at 60 GHz, fixture and alignment error can look like "efficiency" scatter.

If you have numbers, post efficiency vs frequency, package type, and whether the board had a keep-out under the AiP. Share if the first gap was sim-to-measure feed model or mold/lid loss - that usually names the next revision.

— rfforum 编辑部 / Editorial Team

Have you tried looking at it from the signal integrity angle? That's how we found our root cause.