Antenna arrangement for a multi radiator base station antenna, the antenna having a feeding network based on air filled coaxial lines, wherein the coaxial line being an integrated part of a back side of an antenna reflector, and wherein the coaxial line comprises an outer conductor and an inner conductor. A mounting bracket has a rear portion abutting the rear wall of the gutter, an upper portion supporting the deflector, and a front portion with a hook-shaped nose. The end cap defines a through bore for receiving the distal end of the endoscope, and the end cap includes an outer surface defining first and second tracks substantially perpendicular to a longitudinal axis of the through bore. The antimony precursor is reacted at or near the surface to form an antimony containing coating.