Overview of frequency domain measurement techniques of the complex permittivity at microwave frequencies is presented. The methods are divided into two categories: resonant and non-resonant ones. In the first category several methods are discussed such as cavity resonator techniques, dielectric resonator techniques, open resonator techniques and resonators for non-destructive testing. The gener...

After reviewing the limitation by the fine structure constant α of the dimensionless coupling constant of an hydrogenic atomwith amode of the electromagnetic field in a cavity, we show that the situation presents itself differently for an artificial Josephson atom coupled to a transmission line resonator. Whereas the coupling constant for the case where such an atom is placed inside the dielect...

An electrically small antenna based on a dielectric resonator antenna (DRA) is investigated. Two wellknown simulation techniques, the finite element method and the finite integration technique have been applied to study a low volume high permittivity DRA. It is demonstrated that the design of a compact size and wide frequency coverage DRA for 2.4–2.5 GHz ISM frequency band is possible by proper...

In this paper, UWB technology operating in broad frequency range of 3.1-10.6 GHz has shown great achievement for highspeed wireless communications. to satisfy the UWB system requirements, a band pass filter with a broad pass band width, low insertion loss, and high stop-band suppression. UWB band-pass filter (BPF) with wireless local area network (WLAN) notch at 5.8 GHz and 3-dB fractional band...

An L-shaped dual-band multiple-input multiple-output (MIMO) rectangular dielectric resonator antenna (RDRA) for long term evolution (LTE) applications is proposed. The presented antenna can transmit and receive information independently using fundamental TE111 and higher order TE121 modes of the DRA. TE111 degenerate mode covers LTE band 2 (1.85-1.99 GHz), 3 (1.71-1.88 GHz), and 9 (1.7499-1.784...

A new miniature monolithic bandpass filter, which can be manufactured using multilayer standard all-PCB technology, is presented. Each resonator in the filter formed by metal spirals of left and right wist inserted into each other, one pair adjacent ends grounded, other free. Spiral inductors have form identical rectangular frames are designed on dielectric substrates, located a structure stric...

Absntrct -Combiners were developed using two Gunn diodes in dielecpackaged IMPATT diodes giving 10.5-W CW output at 9.1 tric waveguide jimage line) oscillator circuits. The optimum configuration GHz. He coupled individual coaxial oscillators to a main consisted of each Gunn diode being imbedded in a separate dielectric cavity cavity from which the energy was extracted. He further I.Aas a primar...

We propose a compact 1-μm-radius microring resonator sensor based on a hybrid plasmonic waveguide on a silicon-on-insulator substrate. The hybrid waveguide is composed of a metal-gap-silicon structure, where the optical energy is greatly enhanced in the narrow gap. We use the finite element method to numerically analyze the device optical characteristics as a biochemical sensor. As the optical ...

A novel cavity perturbation technique using coaxial cavity ruonators for the measurement of complex permittivity of liquids is presented. The method employs two types of resonators (Resonator I and Resonator ll). Resonator l operates in the fre­ quency range 600 MHZ-7 CH2 and resonator ll operates in the frequency range 4 Gliz-14 CH2. The introduction of the capillary tube filled wit? the sampl...

Mobile communication systems require a narrow-band BPF having low passband loss, high selectivity, small size and flat group delay. Such a filter response can be realized using filter with cross coupling between nonadjacent resonators. Normally this kind of filters is realized using waveguide cavities or dielectric resonators. This paper describes a method for CAD of cross-coupled BPF using min...