In a steering apparatus for a car which presses and retains a steering column upon a fixing bracket to car body to be telescopically adjustable, the steering column is molded from a tubular material by a hydroforming process to have a swelled portion as a unitary structure thereof. In the method, whether a watertight lid outside the optical disk drive is in openclosed state is detected by a sensor. 6 dBm has been demonstrated in silicon with single lobe well behaved radiation patterns closely matching simulation.