Compact Ultra-Wideband Microstrip/Coplanar Waveguide Bandpass Filter
In: IEEE Microwave and Wireless Components Letters, Jg. 17 (2007-03-01), S. 184-186
Online
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Zugriff:
A novel ultra wideband (UWB) bandpass filter is presented, using a compact coupled microstrip/coplanar waveguide (CPW) structure. The filter comprises of a single CPW quarter-wavelength resonator which is coupled to two microstrip open-circuited stubs on the other side of a common substrate. The two microstrip open-circuited stubs, which are about a quarter-wavelength long at the center frequency, can function as two resonators with associated coupling arrangement to the CPW. This forms a very compact three-pole filter. The proposed filter also exhibits a quasi-elliptic function response, with one finite-frequency transmission zero closer to each side of the passband. Thus, a high selectivity is achieved using a small number of resonators, which leads to low insertion loss and group delay across the passband. The performance is predicated using EM simulations and verified experimentally. The experimental filter shows a fractional bandwidth of 90% at a center frequency of 6.4GHz, with two observable transmission zeros (attenuation poles) at 1.95 and 10.36GHz, respectively. Furthermore, it has a very small size only amounting to 0.25 by 0.08 guided wavelength at the center frequency
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Compact Ultra-Wideband Microstrip/Coplanar Waveguide Bandpass Filter
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Autor/in / Beteiligte Person: | Thomson, Neil ; Hong, Jia-Sheng |
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Zeitschrift: | IEEE Microwave and Wireless Components Letters, Jg. 17 (2007-03-01), S. 184-186 |
Veröffentlichung: | Institute of Electrical and Electronics Engineers (IEEE), 2007 |
Medientyp: | unknown |
ISSN: | 1531-1309 (print) |
DOI: | 10.1109/lmwc.2006.890462 |
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