Flexible microstrip antenna arrays have become a necessity in today's miniaturized biomedical wireless devices. Implantable and wearable biomedical devices such as pacemakers, drug delivery systems, heart rate monitors, and respiratory monitors need to communicate with exterior base station devices and relayed to healthcare professionals. In this paper, multiple flexible microstrip antenna arra...

An Ultra Wideband (UWB) microstrip diamond slotted patch antenna with enhanced bandwidth is presented in this paper. The proposed antenna is simulated in CST Microwave Studio and fabricated for measurements. Its simulated result displays impedance bandwidth from 3.28 GHz to 19.64 GHz, whereas the measured result displays the frequency region from 2.01 GHz to 18.67 GHz. The antenna complies with...

A new reflect-array antenna structure is proposed. This structure utilizes a perforated substrate as a reflecting surface with the lattice of different holes. The effective electric permittivity of the dielectric substrate is altered by drilling holes with different diameter and spacing, which provide an in-homogeneous dielectric layer. This in-homogeneous dielectric layer can be controlled by ...

The electromagnetic interface between the antenna and the human head is reduced with ferrite materials and metamaterials. The reduction of Specific Absorption Rate (SAR) with materials and metamaterials is performed by the finite-difference time-domain method with Lossy-Drude model by CST Microwave Studio. The metamaterials can be achieved by arranging split ring resonators (SRRs) periodically....

A singly-fed dual-band circularly polarized dielectric resonator antenna (DRA) is investigated in this paper. It makes use of the fundamental TE111mode and higher-order TE113mode of a rectangular DRA for the dual band design. The DRA has a square cross section. It is excited by a single micro strip line-fed rectangular slot fed. To generate circularly polarized (CP) fields, two corners of the D...

This paper introduces the design of a new dual-band internal printed monopole antenna structure as a candidate for WLAN (wireless local area network) USB (universal serial bus) dongle applications. The proposed antenna structure is based on the second iteration of Peanotype space-filling geometry. The antenna has been printed on a substrate with relative permittivity of 2.33 and thickness of 0....

This paper presents a planar rectenna (rectifier + antenna) design at 2.45 GHz ISM band for microwave power transmission for powering devices involving low power consumption, located in unreachable area or needing expensive maintenance costs. The proposed design incorporate a 3×3 circular polarized antenna array with an enhanced directivity of 9.14 dBi and an overall size of 26.18×11.86 cm 2 mo...

In this present work, Rectangular Microstrip Patch antenna loaded with symmetrically cut H and hexagonal shaped metamaterial (MTM) is proposed for better improvement in the impedance bandwidth and reduction in the return loss at operating frequency 1.794 GHz. The proposed antenna is designed at a height 3.2 mm from the ground plane. At 1.794 GHz, the bandwidth is increased up to 27 MHz in compa...

A radiation pattern synthesis technique for large planar arrays with active element pattern (AEP) method and fine-grained parallel micro-genetic algorithm (FGPMGA) is presented. Based on the AEP method, the mutual coupling between array elements can be taken into account. Analysis problems of large rectangular and triangular grid planar arrays are divided into small linear array problems. And f...

This paper proposes the design and analysis of co-axial continuous transverse stub multiband antenna (CCTS) for multiple high frequency Applications. Coaxial continuous transverse stub antenna is used to operate on multiple frequency bands with small size and low cost. This proposed antenna consists of two stubs, arranged longitudinally to form a waveguide skeleton like structure. The advantage...