VNA Research Papers - Academia.edu (original) (raw)

— In this work, a novel electrical reconfigurable second order microstrip bandpass filter is presented. The investigated filter structure consists of two neighbour coupled octagonal-DGS resonators. The capacitor and varactor are placed on... more

— In this work, a novel electrical reconfigurable second order microstrip bandpass filter is presented. The investigated filter structure consists of two neighbour coupled octagonal-DGS resonators. The capacitor and varactor are placed on the DGS-shape. According to the tunable characteristic of discrete lumped capacitors and varactor diode, the resonant frequencies can be tunable. The proposed filter occupiers an area of 2.5 x 1.5 cm2. The coupling method has been applied and leads to an extended coupling matrix that assumes multiple couplings between both filter resonators. The measured relative tuning range of the bandpass filter is 23.5% with a fractional bandwidth of 12%. Varactors loaded on the octagonal DGS resonator allow us to control the center frequency with quasi constant bandwidth as well as to have a large tuning bandwidth. Based on the detailed analysis, the varactor-tuned DGS bandpass filter is designed, in which the tuning bandwidth reaches 12 % of the center frequency at 5 GHz. The proposed reconfigurable bandpass filter was fabricated and tested. The measured results show a variation of the center frequency from 4.3 GHz(0V)-to 5.4 GHz(15V) tunable range, while the insertion loss varies from 5 dB to 3 dB. The measured performance of the tunable bandpass filter agrees well with the simulation results.

Resumo: O artigo analisa a escritura documental de Vincent Carelli no contexto da mídia indígena. O objetivo é investigar como o filme A festa da moça (1987), com os seus dispositivos de (trans)figuração e (re)invenção do mundo histórico,... more

Resumo: O artigo analisa a escritura documental de Vincent Carelli no contexto da mídia indígena. O objetivo é investigar como o filme A festa da moça (1987), com os seus dispositivos de (trans)figuração e (re)invenção do mundo histórico, ecoa na obra de Vincent Carelli e dos cineastas indígenas vinculados ao Vídeo nas Aldeias (VNA), problematizando a percepção de si, a (re)encenação da tradição, o sistema de reutilização imagético, a (auto)referencialidade, os desvios narrativos, o lugar do Outro e a questão indígena no Brasil. Palavras-chave: Vincent Carelli; Vídeo nas Aldeias; cineastas indígenas; documentá-rio; povos originários. Resumen: El artículo analiza la escritura documental de Vincent Carelli en el contexto del audiovisual indígena. El objetivo es investigar cómo la película A festa da moça (1987), con sus dispositivos de (trans)figuración y (re)invención del mundo histórico, resuena en la obra de Vincent Carelli y de los cineastas indígenas vinculados al Vídeo en las Al...

This paper is to find the RF measurement when microstrip is effectively grounded. The manufacturing method is used for grounding measurement for VIA hole inductance measurement. The available structure for the present investigation was... more

This paper is to find the RF measurement when microstrip is effectively grounded. The manufacturing method is used for grounding measurement for VIA hole inductance measurement. The available structure for the present investigation was fabricated on GaAs substrate. In this paper, wafer probing measurement and mean value of VIA hole inductance is measured with vector network analyzer (VNA) with proper calibration, when the package is effectively grounded. Further studies are in progress.

This paper describes PWLFIT+, an extension to the frequency domain of PWLFIT, a new paradigm in time-domain macromodeling for linear multiport systems, based on a piecewise-linear (PWL) behavioral representation of the Sparameters step... more

This paper describes PWLFIT+, an extension to the frequency domain of PWLFIT, a new paradigm in time-domain macromodeling for linear multiport systems, based on a piecewise-linear (PWL) behavioral representation of the Sparameters step response. While the impulse response of each S-parameter is

In this article we present the findings of a game idea experiment run at the Global Game Jam (GGJ) 2010 and 2011 events in Tampere, Finland. We were examining how well the game-based ideation method Verbs, Nouns, and Adjectives (VNA) and... more

In this article we present the findings of a game idea experiment run at the Global Game Jam (GGJ) 2010 and 2011 events in Tampere, Finland. We were examining how well the game-based ideation method Verbs, Nouns, and Adjectives (VNA) and similar approaches fit the constrained game design processes. GGJ 2010 and 2011 both had a theme for which ideas were produced. Our previous studies indicate that the VNA ideation method is well-suited to blue-sky ideation, but it is harder to use the ideas in ongoing design processes. In this study we compared four different approaches and the ideas resulted by using these methods. This study shows that the theme-tuned VNA variant performed best both in theme-related and interesting ideas, indicating that the method for coming up with new ideas matters.