This paper proposes a two way L and S band Gysel power divider/combiner that uses line to ground resistors. Step by step methods to obtain a wide isolation and transmission bandwidth are presented. A design that uses five resistors is selected and optimized based on Quasi Newton method. Then the Defected Microstrip Structure (DMS) and Defected Ground Structure (DGS) is used to obtain better tra...

The design of compact wideband microwave reflectometers for the purpose of inclusion in a breast cancer detection system is presented. In this system, a wideband frequency source is used to synthesize a narrow pulse via the step-frequency synthesis method. The reflectometer undertakes measurements in the frequency domain and the collected data is transformed to the time/space domain using IFFT....

In many applications counter is used to divide input clock to produce output, the frequency of the output is the divide by N times of the input clock frequency. Due to these reasons ripple counters can be used as frequency dividers to reduce a high clock frequency down to a more usable value for use in digital clocks and timing applications. In many applications such as ultra low power digital ...

This paper presents a low VSWR high gain telemetry antenna system manufactured for UAVs that provides 360◦ coverage in the roll plane of the UAV. Proposed telemetry antenna system includes four telemetry antennas, one power divider that has one input and four output terminals which feeds the telemetry antennas with equal magnitude and phase. Proposed high gain telemetry antennas are based on th...

Diversity antenna loaded with the reactance control circuits configured with variable capacitors was proposed. Advantages of this proposed configuration are that signals are detected only by one receiver and that the hardware architecture is simple. However, effective combining has not been achieved due to a mismatch between the combiner and the receiver. In order to improve this problem, we co...

Introduction Conclusions References

Combiner and Stacked Generalization are two very similar meta-learning methods that combine predictions of multiple classiiers to improve accuracy of any single classiier. In this paper, we compare stacked generalization and combiner from the perspective of training eeciency versus accuracy. We show that both methods improve the accuracy of any single classiier roughly at an equivalent level. M...

Résumé. En classification supervisée, de nombreuses méthodes ensemblistes peuvent combiner plusieurs hypothèses de base afin de créer une règle de décision finale plus performante. Ainsi, il a été montré que des méthodes comme le bagging ou le boosting pouvaient se révéler intéressantes, tant dans la phase d’apprentissage qu’en généralisation. Dès lors, il est tentant de vouloir s’inspirer des ...

A program of study of planar dielectric grating couplers was undertaken. The study focused on the problems associated with using dielectric grating couplers to achieve high efficiency beam coupling to planar waveguide