The technology of the time would indicate radar for night fighter use. The
signal, radio frequency energy, would have been carried to the radiating
units, the small three prong things, by a wire. The wires were enclosed
in a metal tube or jacket up to the radiating element. The last part was
apparently a rigid copper or steel tube meeting the requirements of the
engineering design. The radiator extended from that. The wire was inside
the shielding to prevent stray radiation. The row of radiating antenna
assemblies would have created a directional signal. There are other things
that would have made the signal more directional but drag and weight quickly
becomes a large factor, especially in aircraft of that era. Don't think in
terms of contemporary electronics. Think in terms of rather large vacuum
tubes and antenna systems closer in design and technology to a big TV
antenna on the roof.


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