Patent ID: 8830137

Claim:
An integrated distributed active radiator (DAR) device, comprising: a substrate; a first conductor having a first conductor first end and a first conductor second end; a second conductor having a second conductor first end and a second conductor second end; a return path conductor defining an aperture; said first conductor and said second conductor disposed adjacent each other and overlaying said aperture, said first conductor and said second conductor each defining curves which close on themselves to within a distance of a gap, said first conductor first end electrically coupled to said second conductor second end across said gap, and said second conductor first end electrically coupled to said first conductor second end across said gap; at least one terminal configured to receive a source of DC power; and at least one active element electrically connected between said first conductor and said second conductor, said at least one active element configured to produce a self-oscillation current at a frequency f 0 , said self-oscillation current having a first direction in said first conductor and having a second direction in said second conductor, said second direction opposite to said first direction in said first conductor; said at least one active element configured to generate a harmonic current having a harmonic frequency, said harmonic current having a same direction in said first conductor and in said second conductor and a second harmonic return current in said return path conductor, said integrated distributed active radiator device configured to efficiently radiate electromagnetic energy from said aperture at said harmonic frequency and configured to substantially inhibit the radiation of electromagnetic energy at said frequency f 0 .