Pin Diodes
Mostrando 1-6 de 6 artigos, teses e dissertações.
-
1. Microstrip 3-Bit Fractal-based Phase Shifter
Abstract This paper presents the implementation of a 3-bit microstrip fractal-based phase shifter operating in the 430 MHz to 470 MHz frequency range. The fractal structure is used to confine different delay line lengths in the same area due to the space-filling properties of the used Hilbert fractal curve. The proposed design has three bits corresponding to
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
-
2. Improvement of power efficiency of hybrid white OLEDs based on p-i-n structures
ABSTRACT In this article, hybrid white organic light-emitting diodes (WOLEDs) under p-i-n structures have been investigated in terms of power efficiency. By using tris(8-hydroxy quinolinato) aluminum (Alq3) doped with 8-hydroxy-quinolinato lithium (Liq) as an n-type and WHI112 doped with molybdenum trioxide (MoO3) as a p-type, the typical device structure of
Matéria (Rio J.). Publicado em: 05/03/2018
-
3. A Small Quad-Band Monopole Antenna with Folded Strip Lines for WiMAX/WLAN and ITU Applications
Abstract In this article, a small Quad-Band microstrip patch antenna with folded strip lines for WiMAX/WLAN and ITU Applications is presented. This antenna consists eight symmetrical rectangular folded strip lines with 2 PIN diodes, ground plane and dimensions of 15×20×1.6mm3. Using PIN diodes integrated within the antenna configuration, the antenna would
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-12
-
4. Antenas e superfícies seletivas de freqüência reconfiguráveis para sistemas de comunicação sem fio
Este trabalho tem como objetivo apresentar como as antenas de microfita e as superfícies seletivas de frequência reconfiguráveis podem ser alternativas para operar em sistemas de comunicação sem fio que necessitem alterar sua frequência de operação de acordo com os requisitos impostos a este sistema ou condições do meio. O propósito central é apr
Publicado em: 2009
-
5. Filtros de spin não-magneticos controlados por voltagem / Voltage controlled non-magnetic spin filters
The aim of this work was to study the transport properties of nonmagnetic semiconductor heterostructures: double barrier diodes ? DBD. Our attention was focused on the carrier spin polarization through the structure. First we present the phenomenology behind the carrier transport and how the DBD can act as a spin filter. In the sequence, we present the exper
Publicado em: 2006
-
6. Dispositivos de microondas utilizando linhas de laminas
In this work a theoretical-experimental analysis of unilateral fin lines is presented. The guided wavelength is obtained from adequate measurements in the laboratory. The characteristics impedances and the effective dielectric constants are determined using a method developed based on the theory of ridged waveguides and on the measured guided wavelengths. Th
Publicado em: 1985