Home  About us  Contact
 

Adjustable Bandwidth (adjustable + bandwidth)

Distribution by Scientific Domains
Engineering100%

Selected Abstracts

A bandpass filter with adjustable bandwidth and predictable transmission zeros

INTERNATIONAL JOURNAL OF RF AND MICROWAVE COMPUTER-AIDED ENGINEERING, Issue 2 2010
Li Zhu
Abstract In this article, a microstrip bandpass filter with an adjustable bandwidth and predictable transmission zeros is proposed. The proposed filter is implemented by combining two hairpin edge-coupled resonators with interdigital capacitors. Compared to typical edge-coupled filters, the proposed filter provides a wider bandwidth resulting from a higher coupling strength between its resonators. To further increase the coupling and consequently the bandwidth, a pair of etched slots in the ground plane is used. By adjusting the geometrical parameters of the interdigital capacitors and etched slots, the bandwidth can be easily adjusted. The filter features two transmission zeros, which are determined by means of the semi-analytical model developed as part of this work. Furthermore, the proposed filters can be cascaded to obtain a sharper cutoff frequency response. Frequency responses of the filters from measurements are in good agreement with those simulated using IE3D in the 5,9 GHz range. © 2009 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2010. [source]

SRR loaded waveguide band rejection filter with adjustable bandwidth

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 7 2006
B. Jitha
Abstract The use of a split-ring resonator (SRR)-loaded waveguide for the design of a band-rejection filter with adjustable bandwidth is reported. The width of the stopband can be adjusted by suitably positioning the SRR array in the waveguide. The rejection band can be made very narrow by placing the array at the electric-field minimum. The stopband attenuation depends on the number of unit cells in the array. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1427,1429, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21641 [source]