Jayant Gajanan Joshi

In this research paper, a polyester‐based bandpass microstrip filer is proposed. Split ring resonator, stepped‐impedance resonator structure, and coupled microstrip lines are used to design the proposed filter circuit in the pass band of 4.35 to 4.60 GHz for NATO frequency band military applications. The filter is fabricated using polyester substrate and self‐adhesive copper tape. The Agilent vector network analyzer is used to test the fabricated polyester wearable filter. There is good agreement between the simulated as well as measured insertion loss and return loss of the proposed wearable filter.

Exoskeletons/wearable robots are electromechanical wearable devices that can be installed on human skeletal structure or body part or limb to augment the physical abilities or movements of a person or patient. Exoskeletons provide assistance to elderly or permanently injured persons with more independence. Exoskeletons/wearable robots consists of sensors, actuators, control unit, power supply, mechanical structure with degree of freedom, and human-machine interface. In this chapter, a review of basics of exoskeletons along with different sensors, actuators, and control systems used are presented. Request access from your librarian to read this chapter's full text.

Metamaterial-based electrically small antennas (ESAs) are gaining popularity in RF communication devices and systems due to their appealing features. This chapter attempts to present a compendious and timely review on metamaterial-based ESAs. The metamaterial has been progressively incorporated in different stage-of-the-art techniques to design more compact antennas to a greater extent keeping their radiation Q-factor, bandwidth, and radiation efficiency in acceptable limits. Planar metamaterial loading has shown simplicity, good performance, and more flexibility in designing ESAs for different RF and mobile communication applications. Different types of planar metamaterial split ring resonators have been used to load the microstrip patch antennas. In this chapter, the basics of metamaterial and an extensive review of metamaterial-based electrically small antennas have been presented. Three configurations of metamaterial-loaded rectangular microstrip ESAs designed by the authors have also reviewed.