Koch slot loop antenna for wireless body‐centric communication

Abstract

In this article, we describe the design of a coplanar waveguide (CPW) fed Koch slot loop antenna with a tuning stub. The antenna is optimized to be used in a wireless body‐centric communication. The antenna is designed to operate in the ISM frequency band from 5.725 to 5.875 GHz (ITU‐R5.138, 5.150, and 5.280). The study shows properties of the antenna, from the viewpoint of impedance matching, and radiation patterns. The impedance matching at the resonant frequency can be acquired by a tuning stub. The designed CPW‐fed slot antenna exhibits a proper polarization, a low‐radiation loss, and a weaker dispersion. We experimentally prove that the designed antenna efficiently excites surface waves and creeping waves. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:764–766, 2014

Microwave antennas—An intrinsic part of RF energy harvesting systems: A contingent study about its design methodologies and state‐of‐art technologies in current scenario

“…Prior to it, complete illustration about the microwave antennas in RF energy harvesting are presented with complete design perspective. A comparative study along with performatory analysis of microwave antennas are presented in Table ; keeping intact with rectenna characteristics: operating frequency, realized gain, polarization diversity, input power levels, and RF‐to‐DC power conversion efficiency, which was not in the scope of review papers for RF energy harvesting available in the open literature. Technically, to pursue clear understanding about tradeoffs of modern RF systems; five different cases of planar antennas (monopole antennas) at different bands with reflector surfaces and integrated with rectifier circuits are designed, simulated and analyzed by using FDTD domain solver (CST microwave studio) and circuit solver (advanced design system).…”

“…The different breeds of microwave antennas in RF energy harvesting are shown in Figure ; it includes the basic form of antennas such as dipole antennas, monopole antennas, loop antennas, slot antennas, microstrip antennas, Vivaldi antennas, dielectric resonator antennas, helical antennas, Yagi‐Uda antennas, and log‐periodic antennas . The relevant theories of basic forms of antennas are available in open literature .…”

“…Y-shaped monopole antenna with PEC reflector for wideband circular polarization 5. Y-shaped monopole antenna with AMC reflector for broadband circular polarization Dipole Antennas [65][66][67][68][69] Monopole Antennas [70][71][72][73][74] Loop Antennas [75][76][77][78][79] Slot Antennas [80][81][82][83][84] Microstrip Antennas [85][86][87][88][89][90] Vivaldi Antennas [91][92][93][94][95] Dielectric Resonator Antennas [96][97][98][99][100] Helical Antennas [101][102][103] Log-Periodic Antennas [107][108][109] Yagi-Uda Antennas [104][105][106] Basic Antennas Specialized Techniques Based Antennas [143][144][145]…”

Circularly Polarized Rectangular Ring-Slot Antenna with Chamfered Corners for Off-Body Communication at 5.8 GHz ISM Band

“…Further, SIW based antennas have usually small sensitivity to the surrounding environment. Possible SIW antenna candidates for off-body communication were presented in [2][3][4][5][6]. In [2], the two-pole filtering antenna based on a SIW resonator for BCC is presented.…”

Slot loop antennas printed on 3D textile substrate

“…In [3], the circular shape of the loop was modified according to the Koch fractal. Thanks to the fractal shape, the antenna showed a wider impedance bandwidth.…”