The superconducting Monolithic Microwave Integrated Circuit (MMIC) is vital in all modern superconducting Rapid Single Flux Quantum (RSFQ) digital systems. Importance of microwave components comes from the fact that superconducting circuits operate with an ultra-wide band signal in the ultra-low dissipation environment. At a typical signal bandwidth of 300 GHz, even a 100μm superconducting wire...

In this paper, a new multilayer six-port circuit using ultra-wideband directional coupler is presented and implemented. The use of the multilayer technology allows having a compact circuit and a very large bandwidth. To validate this concept, a six-port prototype was fabricated and measured. Simulation and measurement results show the proposed six-port circuit can easily operate over an ultra-w...

Microwave and Millimeter-wave Rectifying Circuit Arrays and Ultra-wideband Antennas for Wireless Power Transmission and Communications. (May 2007) Yu-Jiun Ren, B.S., National Chung-Hsing University; M.S., National Chiao-Tung University Chair of Advisory Committee: Dr. Kai Chang In the future, space solar power transmission and wireless power transmission will play an important role in gathering...

This paper presents a new structure for a six-port reflectometer which due to its simplicity can be implemented very easily in monolithic microwave integrated-circuit (MMIC) technology. It uses nonmatched diode detectors with a high input impedance which are placed around a phase shifter in conjunction with a power divider for the reference detector. The circuit has been fabricated using the F2...

We report a new technique of scanning capacitance microscopy at microwave frequencies. A near field scanning microwave microscope probe is kept at a constant height of about 1 nm above the sample with the help of scanning tunneling microscope (STM) feedback. The microwaves are incident onto the sample through a coaxial resonator that is terminated at one end with a sharp tip (the same tip is us...

A methodology for guiding process-driven manufacturing organizations in instituting process control on a facility-wide basis is proposed. The methodology begins with a definition of the customer’s expectations and of the manufacturing process used to meet these expectations. The output, of a given process or subprocess must reach four progressive levels of control. When the output can be reliab...

In this work, a 3D capacitive coupling structure employing periodic pattern was used for application to miniaturized on-chip passive components on MMIC (Monolithic Microwave Integrated Circuit). Unlike conventional periodic structure, the characteristic impedance of the 3D capacitive coupling structure was hardly dependent on frequency. Using the 3D capacitive coupling structure, RF passive com...

We have designed and operated a superconducting tunnel junction circuit that behaves as a two-level atom: the "quantronium." An arbitrary evolution of its quantum state can be programmed with a series of microwave pulses, and a projective measurement of the state can be performed by a pulsed readout subcircuit. The measured quality factor of quantum coherence Qphi approximately 25,000 is suffic...