A U-Shaped Meandered Slot Antenna for Biomedical Applications

Abstract

Abstract-In this paper, a U-shaped microstrip patch antenna with meandered slots is presented. It is designed for biomedical applications to operate at 2.45 GHz. Based on the simulation experience, two designs of the patch are introduced with and without use of meandered slots. The comparative study between these two is also demonstrated. It is observed that the antenna with meandered slots shows good performance with sufficient bandwidth, low losses and is capable of use in biomedical applications. Furthermore, the proposed antenna has small size of 35 * 29 * 1.6 mm 3 , and the size of the ground is only 14% of the overall antenna size. The measured and simulated results show good agreement with each other. The antenna is fabricated on an FR4 substrate, and simulation is carried out on FDTD based Empire XCcel simulator.

Ann and Fa Based Design of Hybrid Fractal Antenna for Ism Band Applications

“…There are some important aspects to be considered while implementing an antenna for health care purposes [25]. The essential requirements are: small size, large gain, and easy to use.…”

“…Oraizi and Hedayati [24] have demonstrated the performance of a multiband antenna structure which was realized by the fusion of different fractals designs. A U-shaped meandered slot microstrip patch antenna was proposed that works for biomedical applications [25]. Several researchers have proposed different bio-inspired optimization approaches such as Artificial Neural Network (ANN), Bacterial Foraging Optimization (BFO), Particle Swarm Optimization (PSO), etc for the fractal and hybrid fractal antenna designs.…”

Method of Additive Regularization of Field Integrals in the Problem of Electromagnetic Diffraction by a Slot in a Conducting Screen, Placed Before a Dielectric Layer

“…(32), and correspondingly, positive values of σ j in Eq. (34). This provides decay of the waveguide modes fields in Eq.…”

“…We have got that the parameter σ j in Eq. (34), which determines displacement of poles from this axis, also determines decay of waveguide modes in the direction of their propagation, displayed by the last sum in expression (42). We could apply more usual approach with passing on the complex plane of the argument β and determining zeroes of the function D on this plane, but not their projections on the real axis, i.e., could solve Equation (28) directly.…”

“…In the present work, we shall consider solution of the diffraction problem for a slot structure with a plane dielectric layer, using the eigen-mode technique and shall suggest the procedure of additive regularization, elaborated for the cases of transparent and absorbing layer. From the practical point of view, the last case is of interest in connection with multiplicity of applications of electromagnetic conversion slot systems in physics, engineering, biology, and medicine (see, for example, [22,[32][33][34][35][36]), when one cannot neglect dielectric absorption or the presence of amplification (negative absorption). In the given work, we consider the case of diffraction by one slot in a screen with a homogeneous dielectric behind that, but the method, used in our work, can be effectively applied to the cases when one considers a multilayered dielectric instead of homogeneous one, and to the cases when diffraction occurs due to presence of strip, or a screen with periodical system of many slots or strips, instead of a screen with one slot, as in our work.…”