Narrow bandpass filters (NBPF) are an important type of thin film filter technology that have become commonplace within the electrooptics industry. These devices are indispensable in fields such as analytical instrumentation, microscopy and telecommunications. NBPF are typically characterized as having high transmission with steep roll-offs and broad isolation. Thin film coating designs that me...

An ultra-low power OTA-C bandpass filter is presented in this paper. An 1-150 Hz 4-th order OTC-C bandpass filter is design which is suitable for ECG application. A subthreshold region OTA is designed with current cancellation technology to achieve a very small transconductance. The OTA-C filter is design with TSMC 0.18μm CMOS process. The MIM capacitor is used in this design. The supply of the...

The design and test of a frequency channel selection MEMS filter implemented on a commercial CMOS technology is presented. Mechanical coupling between two clamped-clamped beams is used to obtain 0.5% frequency bandwidth in a tunable 26 MHz bandpass filter with a very low bandpass distortion (less than 0.1 dB), which makes the filter suitable for wireless super-hetherodyne transceivers in commun...

This paper presents a dual-band bandpass filter by introducing transmission zeroes in the passband of a broadband bandpass filter using square-loop dualmode resonators. The transmission zeroes are achieved by using a dual-mode resonator. The dual-mode resonator is attached to two transmission lines of the same length. These lines are coupled to similar transmission line that are attached to the...

This document describes filter design from the standpoint of cost. Filter design techniques that require the fewest possible op amps and passive components are described. Six types of filters are described—low pass, high pass, narrow bandpass, wide bandpass, notch, and band reject. Table Of

Filters with advanced features have numerous applications in many modern technologies. Microwave bandpass filter is one of those filters that can be used for wireless communication .This paper emphasis how to design an interdigital microwave bandpass filter for 2.45GHz. So, this paper focuses on the design of parallel coupled line bandpass filter, two sets of interdigital band-pass filter at 2....

A new miniaturized dual-mode microstrip bandpass filter is presented. The filter structure has been fractally generated based on the 4th iteration Minkowski-like pre-fractal geometry, using the conventional dual-mode square ring resonator as the initiator in the fractal generation process. It has been found that the presented filter possesses a size reduction of about 88% as compared with the d...

A novel high temperature superconducting interdigital bandpass filter is proposed by using coplanar waveguide quarterwavelength resonators. The CPW resonators are arranged in parallel, and consequently the filter becomes very compact. The filter is a 5-pole Chebyshev BPF with a midband frequency of 5.0 GHz and an equal-ripple fractional bandwidth of 3.2%. It is fabricated using a YBCO film depo...

In this paper a dual-band bandpass filter, using stub loaded ring resonator and etched nested C-shape defected ground structure (DGS), is reported. The operating frequencies of the bandpass filter conform to the Bluetooth (2.4GHz–2.484 GHz) and WLAN (5.15 GHz–5.35 GHz) systems. Due to its applications in WLAN and Bluetooth systems, the filter will be subjected to high EM radiation from the ante...

This paper presents a micromachined bandpass filter with miniature size that has relatively outstanding performance. A silicon-based eight-order microstrip bandpass filter is fabricated and measured. A novel design method of the interdigital filter that can create two transmission zeros is described. The location of the transmission zeros can be shifted arbitrarily in the stopband. By adjusting...