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Materials 2013, 6(12), 5613-5624; doi:10.3390/ma6125613
Article

A Compact Band-Pass Filter with High Selectivity and Second Harmonic Suppression

* ,
 and
Signal Theory and Communications Area, Department of Electrical Engineering, University of Oviedo, Multi-Purpose Building, Module 8, Gijón 33203 (Asturias), Spain
* Author to whom correspondence should be addressed.
Received: 3 October 2013 / Revised: 6 November 2013 / Accepted: 19 November 2013 / Published: 3 December 2013
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Abstract

The design of a novel band-pass filter with narrow-band features based on an electromagnetic resonator at 6.4 GHz is presented. A prototype is manufactured and characterized in terms of transmission and reflection coefficient. The selective passband and suppression of the second harmonic make the filter suitable to be used in a C band frequency range for radar systems and satellite/terrestrial applications. To avoid substantial interference for this kind of applications, passive components with narrow band features and small dimensions are required. Between 3.6 GHz and 4.2 GHz the band-pass filter with harmonic suppression should have an attenuation of at least 35 dB, whereas for a passband, less than 10% is sufficient.
Keywords: band-pass filter; artificial magnetic conductor; dispersion diagram; second harmonic suppression; transmission coefficient band-pass filter; artificial magnetic conductor; dispersion diagram; second harmonic suppression; transmission coefficient
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Hadarig, R.C.; de Cos Gomez, M.E.; Las-Heras, F. A Compact Band-Pass Filter with High Selectivity and Second Harmonic Suppression. Materials 2013, 6, 5613-5624.

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