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A novel split-ring resonator (SRR)-based microwave sensor for accurately determining the real parts of the complex permittivity and the complex permeability of magnetodielectric composites is proposed. The proposed sensor is realized using the microstrip technology, where two SRRs coupled magnetically with the microstrip line are printed on two sides of the line. The sensor is designed using the full-wave...
In this work, a simple microwave resonant sensor is proposed for detection of small amount of oil spill in sea water. The sensor is realized using the microstrip technology, and the geometry of the resonant structure is optimized in order to improve the sensitivity. The proposed sensor is designed to operate at 5.85 GHz in the industrial, scientific, and medical (ISM) band. The structure of the sensor...
A dual band microwave planar sensor based on the complementary split ring resonator (CSRR) is proposed for the characterization of dispersive materials. The proposed sensor is designed to work simultaneously at two industrial, scientific and medical (ISM) frequency bands viz., 2.45 GHz and 5.8 GHz, respectively. The sensor structure is realized using two CSRR unit cells loaded on the ground plane...
In this paper, a novel metamaterial absorber working in the C band frequency range has been proposed to reduce the in-band Radar Cross Section (RCS) of a typical planar antenna. The absorber is first designed in the shape of a hexagonal ring structure having dipoles at the corresponding arms of the rings. The various geometrical parameters of the proposed metamaterial structure have first been optimized...
This paper presents a microstrip rectangular loop antenna for wearable application. The substrate used for the prototype model is a FR4 material. The designed antenna can be integrated with a watch and is suitable for the wearable application. The characteristics of the prototype antenna developed, are measured in terms of the return loss, VSWR bandwidth, and radiation pattern. It is found that the...
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