Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 148 for “"Bandpass"”.
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Compact microstrip bandpass filter
In microwave communication systems, the bandpass filter is an essential component, which is usually used in both transmitter and receiver. Parallel-coupled microstrip bandpass filter is one of the most popular filters in communication systems. However, this arrangement of parallel-coupled …
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Miniaturised bandpass filters for wireless communications
… low loss, highly selective RF and microwave bandpass filters. The theme of this dissertation is the realization of planar compact performance microwave and RF bandpass filters for wireless communication systems. The work may be broadly categorised into three sections as follows. The first …
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CAD of rectangular-ridged waveguide bandpass filters
… the design of rectangular or ridged waveguide bandpass filters using a computer. It studies the analysis of rectangular and ridged waveguide discontinuities using Mode-Matching (MM) and explains how to obtain the Generalized Scattering Matrix (GSM) form the MM analysis. Then, the thesis shows …
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A bandpass sigma delta modulator IF receiver
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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A fourth order [Sigma] [Delta] bandpass modulator
A fourth order bandpass [Sigma] [Delta] modulator is proposed to digitize signals from a MEMS gyroscope. The modulator samples the amplitude-modulated signal at eight times the carrier frequency and achieves an SNR of 82dB with a sampling frequency of 640kHz and a bandwidtn o 1.oKnz. ms document …
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Engineering Novel Bandpass Tools for Cascading Gene Expression
Genetic circuits are synthetic biological systems engineered to perform specific functions within living organisms. These circuits play a crucial role in biomanufacturing, optimizing metabolic pathways, and enhancing product yield. With the continuous expansion of genetic circuit engineering, there …
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Bandpass filter design with spurious frequency reduction capability
… are various topologies to implement microstrip bandpass filters such as end-coupled, parallel coupled, hairpin, interdigital and combine filters. This thesis discusses design, simulation, fabrication and testing using microstrip technology. The choice of a parallel coupled filter topology is …
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Design of a continuous-time bandpass delta-sigma modulator
An 8th-order continuous-time (CT) bandpass delta-sigma modulator has been designed and simulated in a 65 nm CMOS process. This modulator achieves in simulation 25 MHz signal bandwidth at 250 MHz center frequency with a signal-to- noise ratio (SNR) of 75.5 dB. The modulator samples at 1 GS/s while …
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Design multilayer bandpass filter using hairpin resonator for digital broadcasting
This research presents 2.52-2.65 GHz band-pass filter using multilayer hairpin resonator for digital broadcasting applications . Four-pole resonators are centered at 2.58 GHz with bandwidth of 130 MHz .This filter is simulated using Computer Simulation Technology software (CST) and Advance Design …
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Integration of microwave and millimeter wave bandpass filters with antennas
… range is presented. SIW is used to design the bandpass filter and serves as the feeding structure for DRA. Design integration with improved radiation efficiency is achieved by replacing the last resonator of the filter with DRA. The synthesis procedure is presented in detail. Equivalent circuit …
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Comparison of two bandpass delta-sigma A/D converter architectures
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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Bragg reflector thin-film resonators for miniature PCS bandpass filters
Thin-Film Resonator (TFR) based bandpass filters are an economically attractive alternative to current dielectric filters. TFR based filters are orders of magnitude smaller and can potentially be manufactured on-chip, thereby allowing VLSI integration of bandpass filters into a RF portable radio …
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Novel miniature microwave quasi-elliptical function bandpass filters with wideband harmonic suppression
… development of innovative and compact microstrip bandpass filters that fulfil the above stringent requirements for wireless communication systems. In fact, the proposed highly compact planar microstrip filters provide an alternative solution for existing and next generation of wireless …
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A sealed cavity thin-film acoustic resonator process for RF bandpass filters
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Tunable narrow bandpass Sigma-Delta analog-to-digital conversion for mobile communication terminals
… variables involved. A second order noise tunable bandpass ΣΔ ADC is studied using pole zero placement techniques in the z-plane. Tuning is performed by moving the zero positions around the unit circle. The optimized pole position is a compromise between noise performance and stability. The signal …
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Bandpass filters for unconstrained target recognition and their implementation in coherent optical correlators
… Specifically, it is shown that variable bandpass filters can be implemented directly in the correlator by adjusting the relative strengths of the signal and reference beams used to write the Fourier transform hologram into the photorefractive. The synthetic discriminant function (SDF) …
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Design and implementation of generalized topologies of time-interleaved variable bandpass Σ−Δ modulators
… generalized time-interleaved variable bandpass sigma-delta modulators are designed, analysed, evaluated and implemented that are suitable for high performance data conversion for a broad-spectrum of applications. These generalized time-interleaved variable bandpass sigma-delta …
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Resonator sensors integrated in bandpass filters for the detection and attenuation of interfering signals
… filter. The proposed method employs a combline bandpass filter at 2 GHz center frequency at 5% bandwidth, which was designed on Advanced Design System (ADS) software and space mapping was performed to optimize the parameters. By weakly coupling the resonator to the filter, the interference …
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A superconducting bandpass delta-sigma modulator for direct analog-to-digital conversion of microwave radio
… converters (ADCs) with improved performance. A bandpass delta-sigma (AE) modulator is an attractive architecture for digitizing narrowband signals with high linearity and a large signal-to-noise ratio (SNR). The design of a superconducting bandpass AE modulator presented here exploits several …
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