Dielectric Resonator
Mostrando 1-12 de 16 artigos, teses e dissertações.
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1. A Design of a Compact Microwave Diplexer in Microstrip Technology Based on Bandpass Filters Using Stepped Impedance Resonator
Abstract This paper describes the design of a compact microstrip microwave diplexer based on bandpass filters and a stepped impedance resonator for 4G applications. The diplexer is composed of two band-pass filters (BPF) that operate at 1.8 and 2.5 GHz. Both bandpass filters for the receiver at 1.705-1.895 GHZ and the transmitter at 2.41-2.6 GHZ have a -3dB
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. YIG Matrix Based Multiband Magneto-Dielectric Cylindrical Resonator Antenna
Abstract A multiband magneto-dielectric resonator antenna with cylindrical geometry is proposed in this paper. The resonator is composed of yttrium iron garnet (YIG) with chemical composition Y3Fe2(FeO4)3. The final structure is built on a low-cost FR4 dielectric substrate. With only one resonator, the antenna is able to resonate in three distinct controlled
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-06
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3. Sixteenth-Mode Substrate-Integrated-Waveguide (SMSIW) Resonator for Dielectric Characterization of Liquid Mixtures
Abstract In this work, a new concept of planar resonator technique for measurement of liquid mixture permittivity is proposed, designed, and implemented using a Sixteen-Mode Substrate Integrated Waveguide (SMSIW) technology. To design the proposed sensor, the conventional SMSIW resonator is designed with an additional air hole on the open side, and then we a
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-03
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4. Design of Biodegradable Quadruple-shaped DRA for WLAN/Wi-Max applications
Abstract A novel Quadruple-shaped Dielectric Resonator Antenna (DRA) excited by a coaxial feed is investigated. The dielectric used for investigation is biodegradable polymer based dielectric material having a dielectric constant (εr) of 3.45 and dielectric loss tangent (δ) =0.02. The resulting antenna offers broad impedance bandwidth of 63.2% for |S11| <
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-09
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5. A Compact UWB Monopole Antenna with Rejected WLAN Band using Split-Ring Resonator and Assessed by Analytic Hierarchy Process Method
Abstract The design of a compact microstrip line-fed Ultra-wideband (UWB) monopole antenna with a notched band characteristic is presented in this paper. The rejection frequency band occurs around 5-6 GHz, which is appropriate for wireless local area network (WLAN) applications and is obtained by a split-ring resonator on the antenna ground plane. The propos
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-04
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6. Experimental and numerical investigation of the microwave dielectric properties of the MgTiO3 ceramic matrix added with CaCu3Ti4O12
Abstract This paper describes an experimental and numerical investigation of the dielectric resonators based on the MgTiO3 ceramic matrix, which relates to their dielectric properties in microwave. The resonators are compounds of the MgTiO3 added with 4, 6, 8, 10 and 12 wt% of the CaCu3Ti4O12. The manufacturing process of the resonators is based on the solid
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2017-04
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7. Improvement of Circularly Polarized Slot-Patch Antenna Parameters by Using Electromagnetic Band Gap Structures
Abstract This paper is devoted to the design of a novel Electromagnetic Band Gap (EBG) circularly polarized slot-patch antenna in multilayered configuration. The operating frequency band can be controlled via the disk radius and adjusting the slit lengths. An arrangement combining the circular slot-patch antenna design and feeding sources included are consid
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-12
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8. Study Neo-Hookean and Yeoh Hyper-Elastic Models in Dielectric Elastomer-Based Micro-Beam Resonators
Abstract Micro-bridge resonator with dielectric elastomer that is sandwiched between two electrodes is studied here with geometric and material nonlinearity. Geometric nonlinearity is introduced with Von-Karman strain-displacement relationship. For material nonlinearity that is modeled rarely in articles, two hyper-elastic models are used here. Governing equ
Lat. Am. j. solids struct.. Publicado em: 2016-10
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9. Design of high gain and wide band EBG resonator antenna with dual layers of same dielectric superstrate at X-bands
Abstract A wide band EBG resonator antenna with two layer of dielectric superstrates of the same material is design which is operating in X band. The EBG superstrates act as Partially Reflective Surfaces (PRS) having positive reflection phase curve which are suspended above a double sided dipole patch antenna fed by a coaxial cable pass through ground plane.
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2016-06
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10. Estudo da estabilidade tÃrmica da liga Ca(Nb1/2Bi1/2)xTi1-xO3:(B2O3)y para uso em antena ressoadora dielÃtrica (DRA) / Study of thermal stability of alloy Ca(Nb1/2Bi1/2)xTi1-xO3:(B2O3)y for use in dielectric ressonator antenna (DRA)
The field of wireless communication has undergone a revolutionary growth in recent decades. This is attributed to the invention of wireless mobile phones. The success of second generation (2G) services of cellular communication, motivates the development of broadband third generation (3G) mobile phones and other wireless products and services, such as Blueto
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/04/2012
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11. Estudo da estabilidade tÃrmica e estrutural de matrizes de Ca(Nb1/2Y1/2)xTi1-xO3 Y= Bi,Fe e Ca(Nb2/3Li1/3)xTi1-xO3-delta e seu uso em antenas dielÃtricas ressoadoras (DRAs) em Micro-ondas / Thermal Stability Analysis of Ca(Nb1/2Y1/2)xTi1-xO3 Y= Bi, Fe e Ca(Nb2/3Li1/3)xTi1-xO3-delta matrix and their use in microwave dielectric resonator antennas.
O crescimento das indÃstrias de telecomunicaÃÃes criou uma demanda por materiais cerÃmicos para aplicaÃÃes em micro-ondas. Estes materiais devem ter alta permissividade dielÃtrica (er), elevado fator de qualidade (Q) e coeciente de temperatura (tau_f ) menor ou igual a 10 ppm/ÂC, alÃm de baixo custo. O Titanato de CÃlcio (CaTiO3-CTO) possui alta pe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/02/2012
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12. Estudos das propriedades dielétricas em micro-ondas de cerâmicas dos sistema ZnO-Nb2O5-TiO2 para aplicações em comunicações espaciais / A study of microwave dielectric properties of ZnO-Nb2O5-TiO2 ceramic system for applications in space communicatios
O crescente desenvolvimento das telecomunicações impulsiona a pesquisa por novas tecnologias que possibilitam o aprimoramento do desempenho dos equipamentos. Cerâmicas dielétricas encontram aplicação como ressoadores dielétricos (RDs) em sistemas de comunicação que operam em frequências de microondas. Para a construção de um ressoador dielétrico
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/08/2011