The significance of antennas and their related RF systems in military and aerospace systems cannot be understated, as connectivity is now a critical force-multiplier both on and off the battlefield.

This FAQ will look at the Butler matrix, a widely used passive technique for implanting and ESA, which is not well known.

Running the output of an RF modulator to the connector didn’t net an image on the screen, even though the same method worked when hooked up to the antenna inputs. Undeterred, [John] dug deeper.