Miniaturized UWB Bandpass Filters With Notch Using Slow-Wave CPW Multiple-Mode Resonators

Autor:	Vikram Sekar, Kamran Entesari
Rok vydání:	2011
Předmět:	Physics business.industry Bandwidth (signal processing) Stopband Condensed Matter Physics Band-stop filter Resonator Band-pass filter Return loss Electronic engineering Optoelectronics Insertion loss Electrical and Electronic Engineering business Passband
Zdroj:	IEEE Microwave and Wireless Components Letters. 21:80-82
ISSN:	1558-1764 1531-1309
Popis:	In this letter, a miniaturized, ultra-wideband (UWB) filter with notch using a slow-wave co-planar waveguide (CPW) multiple-mode resonator (MMR) is presented. By employing a slow-wave CPW MMR, the resonator length is reduced by 40% at mid-band frequency compared to the conventional CPW MMR. The proposed UWB filter employs stub-loaded microstrip-CPW transitions that improve the rejection skirt and defected ground structures (DGS) to provide better stopband rejection. A novel bridge structure is proposed to create a notch in the filter passband to reject WLAN interference. A passband from 3.1 to 10.6 GHz (110% bandwidth around 6.85 GHz) with a rejection notch at 5.65 GHz is achieved with insertion loss of 0.9 dB and return loss better than 10 dB. Using DGS, a rejection greater than 22 dB is achieved from 11 to 16 GHz while still having a 25% reduction in filter size compared to the conventional case. Design, simulation and measurement of filter prototypes are presented.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bc2e0b80b07f07e3801ed9cad61dfb06 https://doi.org/10.1109/lmwc.2010.2096803 Zobrazit plný text záznamu