Soon after radar-guided anti-aircraft missiles became a threat, planners realized that the simplest way to stop them was to take out the radar. These radars make an easy target; in radio terms, they are equivalent to lighthouses, radiating brightly. So in 1958 the U.S. introduced the Shrike, an “Anti-Radiation Missile” that homed in on enemy radar and proved invaluable in the Vietnam War. The modern successor is the AGM-88 HARM High Speed Antiradiation missile, which has longer range and a speed of over mach 2. “No U.S. aircraft has ever been lost to surface-to-air missiles when HARM has been flying cover,” Mike Vigue, HARM Growth Manager at Raytheon, told me.
When ever you read articles like this, people act like it is a great weakness that HARM missiles can’t hit a radar set that has been turned off. But a radar set that has been turned off is not a threat. It is a lot cheaper to pay few planes armed with HARM missiles to fly cover then it is to make sure all of your planes are stealthy.
In a world of unlimited resources, naturally one would want all your planes to be stealthy. But in the real world, their are lot more pressing concerns.