wherein the surfaces are plane

Introduced: January 1980

Last revised: January 2006

Full Title

Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic > using reflecting surfaces > having two or more spaced reflecting surfaces > wherein the surfaces are plane

Classification Context

Section:: ELECTRICITY
Class:: ELECTRIC ELEMENTS
Subclass:: ANTENNAS, i.e. RADIO AERIALS