Compact semilumped elliptic‐function low‐pass filter using microstrip meander line

Abstract

For the size reduction and sharp attenuation of the low‐pass filter in lower RF frequency range, a semilumped elliptic‐function low‐pass filter was proposed using microstrip meander line, chip capacitor, and radial stubs. To estimate more accurate inductance of microstrip meander line, it was modeled in an inhomogeneous dielectric environment, and then the calculated inductance was compared with the conventional case. To provide an additional attenuation pole in stop‐band, radial stubs were added to the proposed structure. The 3‐order low‐pass filter has a cutoff frequency of 1GHz and dimension of 14.6 × 16.3 mm2 on the substrate with a relative dielectric constant of 3.38. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1777–1779, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22545

Compact Bandstop Filter for UHF in Modified Meander Arrangement with Capacitors

“…Limitations on dimensions are a common obstacle and in the literature, one can find reports on filters designed with compactness as the priority, for example, Refs. ; however, the presented results do not show that these filters are able to block a distortion in nearby spectrum. Filters capable of this task, like reported in Refs.…”