This paper presents a compact tunable bandpass filter that is based on open split ring resonator to achieve high out-of-band rejection. Exact equations and design procedures are given based on strict theoretical analysis. By loading the varactor diodes, the center frequency and bandwidth of the bandpass filter could realize reconfigurable. Then defected ground structure was adopted in the input...

The MF8 consists of two second-order bandpass filter stages and an inverting operational amplifier. The two filter stages are identical and may be used as two tracking second-order bandpass filters, or cascaded to form a single fourth-order bandpass filter. The center frequency is controlled by an external clock for optimal accuracy, and may be set anywhere between 0.1 Hz and 20 kHz. The ratio ...

Compact selective bandpass filter, based on the Rhodes approximation, is proposed using the novel modified hairpin resonators realized on a double-sided microstrip. The equivalence is presented between the hairpin resonator realized on a singlesided microstrip and the modified hairpin resonator realized on a double-sided microstrip. The footprint area of the filter is reduced by 50% with the mu...

Background: This paper describes an analytical study of a bandpass filter that is based on the dynamic response of electrostatically-driven MEMS oscillators. Method of Approach: Unlike most mechanical and electrical filters that rely on direct linear resonance for filtering, the MEM filter presented in this work employs parametric resonance. Results: While the use of parametric resonance improv...

In this study, a fractal, Y-shaped dual-mode resonator bandpass filter (BPF) with input-output cross-coupling is introduced. A parallel-coupling feed structure with a cross coupling has been used to generate two transmission zeroes (TZs) near the lower and upper cutoff frequency that can effectively improve the passband edge selectivity. Also, a fractal shaped based on conventional diamond and ...

— In this paper, the design of a computationally efficient variable bandpass digital filter is presented. The center frequency and bandwidth of this filter can be changed online without updating the filter coefficients. The warped filters, obtained by replacing each unit delay of a digital filter with an allpass filter, are widely used for various audio processing applications. However, warped ...

The bandpass filters are most widely used in radio frequency (RF) front end equipment of the microwave wireless communication systems. The parallel-coupled line structures are popular for the bandpass filters such as the parallel-coupled lines cascaded together [1]. The parallelcoupled lines combined with open-stub lines for harmonic suppression improvement was also proposed [2]. Furthermore, s...

In this paper, tunable microstrip bandpass filters with two TUNABLE BANDPASS FILTER SCHEMATIC AND OPERATION. Fig. 1 shows. A. Melloni, and F. Morichetti, “Tunable photonic circuits: a leap toward tunable microstrip bandpass filter using thin-film Barium-StrontiumTitanate (BST). -Electrical circuits and calculus class tutor (Sp 2013, Fa 2013). -Design tunable capacitors (varactors) and band-stop...