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In this paper, a wearable antenna system is presented for integration into cloths and shoes for communication purposes such as safety and tracking activities. First a dipole antenna is designed to be placed on safety shoe. Then the radiating characteristics of two antennas array is simulated for different positions on a sample shoe using a detailed simulation model with a homogeneous foot phantom...
In this article, a four-element dual-band printed slot antenna array for the future fifth generation (5G) mobile networks is proposed. The antenna element has a compact with size of 0.8 λ0 × 0.75 λ0 at 28 GHz. The simulated results show that the designed antenna has a dual-band function at 28/38 GHz that covers future 5G applications. The designed 1-to-4 modified Wilkinson power divider is used to...
In this paper, new dual-band phased array antenna (PAA) systems for microwave imaging and hyperthermia treatment applications reintroduced. The proposed 433/850 MHz dual-band antenna element consists of two printed folded-dipole antennas to achieve both good penetration depth for electromagnetic energy and resolution. Design parameters are optimized to focus the energy inside the tumor location, by...
Inverse problems arise in various areas of science and engineering. These problems are not only difficult to solve numerically, but they also require a large amount of computer resources both in time and memory. It is therefore not surprising that inverse problems are often solved using techniques from high-performance computing. We consider the parallelization of an inverse problem in the field of...
Wind and solar are considered as if the most beautiful form of non renewable source of energy for harvesting the electricity to meet the global energy demand. Off grid hybrid systems are more useful as compared to grid connected system for supplying the rural areas and grid isolated system. Both hybrid and conventional system can together increase the stability of the system and hence economical in...
Low cost fabrication techniques might give rise to defects in electromagnetic structures. This paper investigates the detrimental effect of producing frequency selective screens with differing percentages of absent square loop elements. It is shown that as many as one in five elements can be incomplete before the array transmission response is considered unusable.
In this paper an exact electromagnetic near-fields expressions for an array of circular loop antennas (CLA) are presented. The technique is based on the spherical wave functions expansion for the free space Green's function. Fields of the uniform current CLAs array and that on the axis of the array, as well as the fields of the so called gate antenna arrangement, are obtained from the general expressions...
In this paper, we introduce a two element array MIMO antenna with reduced coupling and surface wave effect. The coupling has been reduced by employing an electromagnetic bandgap structure between the two elements of the array antenna and a defected ground structure between the two antennas. The proposed MIMO antenna is characterized by very small antenna separation 0.06 λ. The coupling reduction principles...
A 1 × 3 element linear array of cylindrical dielectric resonator antenna (CDRA) is designed and presented for 802.11a WLAN system applications. The two elements of CDRA array are excited by rectangular shaped aperture slots placed on the ground plane, while the slots themselves are excited through the microstrip line. The third element (i.e., central CDRA) is excited through the mutual coupling of...
In this paper, the tuning technique of 3-elements cylindrical dielectric resonator antenna (CDRA) array for wireless LAN 802.11 a/b/g standard applications is studied experimentally. The rectangular shaped aperture slots are used to excite the first and last radiating element. The aperture slots etched on the ground plane are excited by using the 50Ω microstrip transmission line. The electromagnetic...
A millimeter-wave passive Van Atta retrodirective antenna (RDA) array is presented in substrate integrated waveguide technology. The proposed RDA design is based on alternating SIW slot antenna arrays whose longitudinal slots are etched in a continuous ground plane covering the entire circuit thus minimizing the diffraction at the edges of the feeding network. Owing to its closed guiding medium and...
A multi-element parasitic planar inverted F-antenna (PIFA) array operating at 1900MHz was designed for beam steering. The array consists of a driven element and two parasitic elements both terminated with capacitive reactances. The proposed antenna array has 60%-130% wider bandwidth than a single PIFA and can direct its beam at three different angles in one of the elevation planes. The beam direction...
In this paper, we propose two algorithms for generating a complete n-bit binary reflected gray code sequence. The first one is called Backtracking. It generates a complete n-bit binary reflected gray code sequence by generating only a sub-tree instead of the complete tree. In this approach, both the sequence and its reflection for n-bit is generated by concatenating a ldquo0rdquo and a ldquo1rdquo...
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