2 posts tagged with "phasedarray"

Bugs encountered during New Product Introduction (NPI) are eighty percent not the "wrong line of code" variety of pure software problem — they are cross-layer interactions: hardware design passes review but SMT variation kills a certain batch; ATE test passes but the system side hits a firmware corner case because of a different profile; everything works in the lab until the customer's environment surfaces a coexistence interference issue.

This post fully documents the checklist I use on Wi-Fi / RF SoC product lines to "classify first, find root cause second." Future cases can be run through this list from the top.

Background​

The development of wireless scanning technology began in the late 19th century, with fixed narrow beams produced by high-gain antennas. During World War II, the invention of radar enabled high-gain antennas to rotate mechanically, scanning the beam to achieve full 360° coverage.

To eliminate mechanical rotation, extend equipment lifespan, and improve multi-target tracking capability, PESA (Passive Electronically Scanned Array) technology was introduced in the 1960s. Starting from the 1980s, as high-frequency semiconductor technology matured, various AESA (Active Electronically Scanned Array) implementations followed.

While each new generation of wireless scanning technology is more complex than the last, system performance — detection range, resolution, tracking capability, and reliability — has improved dramatically with each generation.