Two characterisations methods in microwaves are presented. They permit to obtain IS*, Rs and h for a HTS film without the need of any theoretical model for the superconductivity. The best film tested exhibits at 35GHz and 78K a Rs value of LO&. at least three times lower than the copper one. A quasi-integrated oscillator has been realised on a lcm2 area: it oscillates at 12GHz and close to liqu...

In recent years, the study of newer types of dielectric materials and compositions has been of great interest. The quest for new, innovative and easily obtainable dielectric materials that yield predictable and controllable permittivity and permeability values with very low dielectric loss has always been fruitful. New ideas and designs to implement these materials in microwave devices and stru...

We studied two types of nanopillar spin-valves: one using an in-plane magnetized polarizer layer and one using a perpendicular polarizer. Both types of devices contain a magnetic vortex in the second magnetic layer. Under direct current (DC) bias, the devices with in-plane polarizer exhibit persistent microwave oscillations that are characterized by two oscillation peaks and long timescale, dis...

Wireless local area networks (WLANs) are considered to be the fastest growing communication technology because of their low cost and high data rates. In this paper the effect of interference caused by Bluetooth devices and Microwave ovens on the performance of 802.11b WLANs is investigated. Results show that 802.11b WLAN are not affected severely while operating in the presence of a Bluetooth l...

Coupled electro-thermal simulations are performed to demonstrate predictive design of microwave devices. These simulations are based on an original, fully physical, thermal impedance matrix approach, capable of describing 'nearly exactly' time-dependent heat flow in complex 3-dimensional systems, whilst requiring no model reduction for electro-thermal CAD. This thermal model is validated by the...

We review recent developments in space mapping techniques for modeling of microwave devices. We present a surrogate modeling methodology that utilizes space mapping combined with radial basis function interpolation. The method has advantages both over the standard space mapping modeling methodology and the recently published space mapping modeling with variable weight coefficients. In particula...

ELECT A photonic-assisted scheme for the phase noise measurement of microwave signal sources is proposed based on the optical delay-line method. In the proposed scheme, all the microwave signal processing is implemented in the optical domain, and the electrical devices that would limit the operation bandwidth and measurement sensitivity are avoided, leading to a large operation bandwidth and a ...

We investigate the nonclassical states of light that emerge in a microwave resonator coupled to a periodically driven electron in a nanowire double quantum dot (DQD). Under certain drive configurations, we find that the resonator approaches a thermal state at the temperature of the surrounding substrate with a chemical potential given by a harmonic of the drive frequency. Away from these therma...

A novel MEMS thermopile structure is presented, which consist of linearly arranged pand ntype polysilicon strips instead of the conventional loop-like configuration. It is shown that these devices sense the millimeter wave radiation beyond the infrared. The polarity and frequency dependence of the sensitivity prove that these strips behave as absorbing antennas towards the microwave/millimeter ...

We describe a low-temperature sample probe for the electrical detection of magnetic resonance in a resonant W-band (94  GHz) microwave cavity. The advantages of this approach are demonstrated by experiments on silicon field-effect transistors. A comparison with conventional low-frequency measurements at X-band (9.7  GHz) on the same devices reveals an up to 100-fold enhancement of the signal in...