Two-dimensional scalable radiator array
A device for signal generation including a unit cell. The unit cell contains two oscillators that are coupled in phase. Each oscillator operates at a fundamental frequency. Each oscillator further includes a slot structure, and the slot structures serve as, at a third harmonic of the fundamental frequency, a slot antenna radiating a third harmonic power. If the device contains multiple unit cell, then each unit cell is horizontally coupled out-of-phase and vertically in-phase with adjacent cells at the fundamental frequency in the device. Therefore, coherent radiation and power combining are achieved at the third harmonic.
1. A device for signal generation comprising coupled unit cells, each of the unit cells comprising
two oscillators that are coupled in phase; each said oscillator operating at a fundamental frequency; each said oscillator further comprising a slot structure;
wherein the slot structures serve as, at a third harmonic of the fundamental frequency, a slot antenna radiating a third harmonic power.
2. The device of claim 1 , wherein the slot structures are each substantially perpendicular to a virtual boundary line between the two oscillators.
3. The device of claim 1 , wherein the oscillators each contains two identical radiating elements separated and connected by the slot structure of the oscillator; the device comprising four said identical radiating elements.
4. The device of claim 3 , wherein the radiating element comprising a transistor; and a meander structure connected to the transistor; the transistor further connected to the slot structure of the radiating element.
5. The device of claim 4 , wherein an end of the meander structure is open-ended.
6. The device of claim 4 , wherein the meander structure has a substantially “S” shape.
7. The device of claim 4 , wherein a drain of the transistor connects to the slot structure of the radiating element; a source of the transistor connecting to the meander structure of the radiating element.
8. The device of claim 7 , wherein a gate of the transistor connects to a transmission line of the radiating element that is substantially parallel to a virtual boundary line between the two oscillators of each of the unit cells.
9. The device of claim 1 , further comprising a plurality of said unit cells along each one of two different directions.
10. The device of claim 9 , wherein each of the plurality of unit cells is horizontally coupled out-of-phase and vertically in-phase with adjacent cells at the fundamental frequency.
11. The device of claim 9 , further comprises an elliptical lens attached at a backside of the device.