. "FIG. 3a depicts a straight delay line type, FIG. 3B is a meander-line delay line type, FIG. 3c is a T-junction phase type, FIG. 3d is a series phase type, FIG. 3e is a series PIN diode phase type, FIG. 3f is a shunt phase type, FIG. 3g is a shunt PIN diode phase type and FIG. 3h is a ferroelectric phase type." . . .