Abstract— The inductor-less designing of monolithic tunable active dual-band bandpass filter is presented in this study. Biasing voltages signify main role. They can control the center frequency and quality factor. Using four biasing voltages and cascading two similar filters leads to dual-band bandpass filter. By keeping the gain constant, the center frequency shift is 200 MHz. Regardless cons...

The development of tunable filters is a key point for the ability of optical telecommunication networks to comply with the continuous evolution of the service providers needs. Among the numerous technologies which can be used to achieve narrow bandpass filtering devices, we concentrate our analysis on Thin-Film Interference Coatings and compare the principles, performances and use constraints o...

This paper presents a 600kHz MEMS bandpass filter implemented using electrical coupling of single crystal silicon HARPSS micromechanical resonators. Passive and active filter synthesis approaches based on electrical coupling of capacitive MEMS resonators are introduced and discussed. A third order passive bandpass filter at the center frequency of 600kHz with a bandwidth of 125Hz, a stopband re...

Microstrip triple band tri-section bandpass filter using stepped impedance resonators (SIRs) is designed, simulated, built for the first time using hair pin structure and tested. The coupling effect between each SIR is investigated and its effect on the filter characteristics including bandwidth, attenuation is given. The simulation results, and measured results are compared and found to be ver...

This paper presents short summary about commonly used filters in macroeconomics. We consider Hodrick-Prescott filter, Butterworth filter, Ideal Bandpass filter, Baxter-King filter and Christiano-Fitzgerald filter. 1 The filtering problem Given raw data, {xt}t=1, we are interested in isolating component of xt, denoted by {yt}t=1, with period of oscillation between pl and pu, where 2 ≤ pl < pu < ...

A fully differential high-Q bandpass filter that uses lossy integrated inductors is presented. The circuit is implemented in a 0.8 m BiCMOS technology and realizes a center frequency of 750 MHz with a Q-factor that is tunable from 10 to 490 while dissipating 80–100 mW from a single 5 V supply. Since the objective of the prototype was to explore the proposed Qenhancement technique, the dynamic r...

A new compact microstrip bandpass filter design is introduced in this paper as a candidate for use in modern wireless communication systems. The proposed filter structure is composed of two fractal-based microstrip resonators. The structure of each resonator is in the form of the Hilbert fractal curve geometry. Two microstrip single-mode resonators with structures based on the 3rd and 4th itera...

Introduction: The new wireless and mobile communication systems use miniature Radio Frequency (RF) module design technologies to satisfy low-cost and compact size. Theses requirements are critical for some specific application such as bandpass filter, diplexer, and coupler to reduce the cost and size of mobile system. Recent advances in integration technology and device performance paved the wa...

In this paper we introduce a simple, computationally inxepentsive, adaptive recursive structure for enhancing bandpass signals highly corrupted by broad-band noise. This adaptive algorithm, enhancing input signals, enables us to estimate the center frequency and the bandwidth of the input signal. In addition, an important feature of the proposed structure is that the conventional bias existing ...

In this paper, a compact ultra-wideband bandpass filter using a back to back Coplanar Waveguide (CPW)-to-microstrip transition structure is proposed. Compared with traditional ultrawideband bandpass filters using hybrid structures, the proposed filter has a sharper selectivity because of two transmission zeros located at the lower and upper edges of the passband, respectively, generated by a mo...