The concept of on-chip double-resonant-tunneling-diode (RTD) patch-antenna oscillator has the virtues compactness, simplicity, high isolation from external circuitry, and increased output power. Relying on this concept, we demonstrate an order magnitude increase in power compared to previous reports RTD oscillators: 10 ?W at fundamental frequency 525 GHz 70 330 GHz. Estimates show that signific...