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Air defense systems may exploit a variety of technologies to detect and engage stealthy targets. One way to off set the protection offered by low radar cross-sections is to direct more energy on the target and enhance the sensitivity of the receiver. Another approach is to take advantage of the fast scanning speeds of electronically scanned array to re-examine suspect signals after the rest of the scan is completed. This approach is employed in Ericsson Microwave Systems' Giraffe and Sea Giraffe agile multibeam. Using VHF and UHF frequencies in radars, instead of microwave frequencies, can also diminish stealth advantages. Laser radars that detect hydrocarbons in the air can detect stealthy targets that release hydrocarbons through their exhausts.

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