A high resolution imaging of the temperature and microwave near field can be a powerful tool for the non-destructive testing of materials and devices. However, it is presently a very challenging issue due to the lack of a practical measurement pathway. In this work, we propose and demonstrate experimentally a practical method resolving the issue by using a conventional CCD-based optical indicat...

Parallel plate capacitors employing Bi1.5Zn1.0Nb1.5O7 sBZNd thin films with the pyrochlore structure were fabricated on platinized sapphire substrates. The total device quality factor and capacitance were analyzed in the microwave frequency range sup to 20 GHzd by measuring reflection coefficients with a vector network analyzer. The parasitics due to the probe pads were extracted from the measu...

A solid-state microwave generators system is considered as an alternative to the magnetron, in order to inject electromagnetic energy into the cavity of a microwave oven for domestic use. Over current devices, the use of solid state technology allows to control the frequency and phase of the electromagnetic field generated. Considering a simplified cavity with 2 solid state sources, the influen...

Optical conformal mapping has been used to construct several isotropic devices with novel functionalities. In particular, a conformal cloak could confer omnidirectional invisibility. However, the maximum values of the refractive indexes needed for current designs are too large to implement, even in microwave experiments. Furthermore, most devices designed so far have had imperfect impedance mat...

We present the outline of the optical design of a TeraHertz (THz) imager for the detection of shrapnel-loaded improvised explosive devices (IED) devices at “stand-off” distances of 14–26 meters. The system will use 4 antenna-coupled TES detector arrays of 16 by 16 pixels cooled in a cryogen-free system with microwave readout to see beneath clothing at non-lethal detonation distances. A spatial ...

Nonlinear device behavior is one of the concerns in telecommunications because of the possible information interference and the reduction in effective bandwidth. Measurement systems and black box modeling techniques to characterize and simulate these nonlinear devices would be a valuable tool. This paper explains briefly a prototype of a measurement system for nonlinear RF and microwave devices...

We show that a flat metasurface with a parabolic reflection-phase distribution can focus an impinging plane wave to a point image in reflection geometry. Our system is much thinner than conventional geometric-optics devices and does not suffer the energy-loss issues encountered by many metamaterial devices working in transmission geometry. We designed realistic microwave samples and performed n...

High Power Microwave technology has matured to the point where practical ElectroMagnetic Pulse [1] weapons are becoming technically feasible, with applications in Electronic Combat, Offensive Counter-Air, Combat Air Support and in Strategic Air Attack. The current development of conventional ElectroMagnetic Pulse devices allows their use in non-nuclear confrontations. This paper proposes a doct...

In this work, we utilize the Finite-Difference Time Domain (FDTD) Method coupled to a full band, Cellular Monte Carlo simulator to model high-frequency devices. Replacing the traditional Poisson solver with a more robust electromagnetic (EM) solver provides a complete solution of the Lorentz force resulting in a more accurate model for determining the small-signal response of microwave transist...

Nonlinear device behavior is one of the concerns in telecommunications because of the possible information interference and the reduction in effective bandwidth. Measurement systems and black box modeling techniques to characterize and simulate these nonlinear devices would be a valuable tool. This paper explains briefly a prototype of a measurement system for nonlinear RF and microwave devices...