Abstract: A voltage-controlled oscillator comprises a tank circuit and first and second pairs of transistors. Each transistor comprises a gate, a drain, and a source. The drains of the first pair are coupled to the tank circuit and the gates of the first pair are cross-coupled with the drains of the first pair. The drains of the second pair are coupled to the tank circuit and the gates of the second pair are cross-coupled with the drains of the second pair. The oscillator includes a first resonant filter comprising a first terminal coupled to the sources of the first pair and a second resonant filter comprising a first terminal coupled to the sources of the second pair. A method includes adjusting capacitance in a resonant filter to cause the resonant filter to resonate based on a selected frequency.

Abstract: Three-dimensional (3D) devices that can receive, harvest or transmit electromagnetic energy with increased efficiency as compared to planar, two-dimensional devices, and methods of making thereof, are disclosed.

Abstract: The present invention describes a tunable micro-antenna of reduced electrical dimensions. This antenna consists of the agglutination of several substrate layers (11), identical or distinct, with electrical, thermal and mechanical properties compatible with the manufacturing processes of integrated circuits. These layers are interleaved with metallic sheets (12) that are interconnected by metallized walls or vias, in such a way that they form a radiating structure (15) and a ground plane (14). The radiating structure includes slots in one or more levels, therefore allowing a greater reduction of the antennas' electrical length. These slots may include switches, used to render the antenna tunable.