A differential (or balanced) bandpass filter based on open complementary split ring resonators (OCSRRs) coupled through admittance inverters is presented in this article. Pairs of OCSRRs are symmetrically placed in a mirror configuration between the strips of the differential line and are modeled by means of two series connected parallel resonators. For the differential (odd) mode, there is a virtual ground at the connecting plane between the OCSRR pairs, and the structure is roughly described by the canonical model of a bandpass filter, consisting of a cascade of shunt resonators coupled through admittance inverters. It is demonstrated that, through a proper design of the OCSRR stages, the common mode noise in the vicinity of the differential filter pass band can be efficiently suppressed. Due to the differential mode operation of the filter, it is not necessary to incorporate metallic vias to ground the OCSRRs. Moreover, as compared to other differential filters based on OCSRRs, defected ground structures are not present in the proposed filters. To illustrate the potential of the approach, two balanced bandpass filters are designed, fabricated, and characterized. V C 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:910-916, 2014; View this article online at wileyonlinelibrary.com.ABSTRACT: A dual narrow band wearable antenna is proposed to operate in the range of 2.4-2.5 GHz and 5.7-5.9 GHz for WLAN and telemedicine applications. The proposed design is achieved by simple modification to the rectangular patch antenna. The antenna design is low profile and easy to integrate with the fabric. V C 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:916-918, 2014; View this article online at wileyonlinelibrary.com.

No abstract

No abstract

No abstract

No abstract

No abstract

No abstract

No abstract