Patent ID: 8558745

Claim:
An antenna arrangement for generating and receiving terahertz radiation, comprising: a substrate comprising a photoconductive material; and a pair of electrodes provided on the photoconductive material, each electrode of said pair of electrodes including a plurality of elongate fingers spaced apart from each other, arranged in a parallel relation and defining finger gaps therebetween, the fingers of one electrode of said pair of electrodes being located within the finger gaps formed between the spaced apart fingers of another electrode so that two neighboring fingers belong to different electrodes, the fingers of each electrode having at least one protrusion extending away from lateral sides of the fingers within the finger gaps; wherein each protrusion is slanted at a predetermined angle with respect to the direction of the finger from which the corresponding protrusion is extended, and directed towards a neighboring protrusion extending from the neighboring finger such that end edges of the neighboring protrusions extending from the neighboring fingers approximately face one another, thereby defining a protrusion gap between end edges of the facing protrusions; and wherein for each finger gap the protrusions located therewithin are slanted in opposite directions than the protrusions located within the neighboring finger gaps.