Within the framework of the development of a wearable communications system for a sportsman, a textile antenna has been realised. The required antenna needed to be low profile, washable, insensitive to the proximity of the human skin and relatively insensitive to deformation. To overcome the human operator coupling effects on the antenna input impedance, i.e. a shift in resonance frequency and ...

Microstrip patch antennas are intrinsically narrow bandwidth devices, i.e. less than 10 %. Special techniques are always applied in order to increase their bandwidths. These include complicated wideband balun impedance transformers and parasitic elements. Abdelaziz reported a 10 GHz dual-element microstrip patch antenna design which was printed on a 1.6 mm thick Duriod substrate [1]. The two el...

This paper illustrates the design and development of series-fed two-dipole-array antenna (STDA) for Wi-Fi applications. The proposed consists two dipole elements different lengths, which are serially joined by coplanar strip line. incorporates a coaxial/probe feeding technique with balun as an alternative mechanism. main goal this was to create high-gain array configuration For STDA configurati...

The optical properties of plasmonic dipole and bowtie nanoantennas are investigated in detail using the Green's tensor technique. The influence of the geometrical parameters (antenna length, gap dimension and bow angle) on the antenna field enhancement and spectral response is discussed. Dipole and bowtie antennas confine the field in a volume well below the diffraction limit, defined by the ga...

In this paper, the printed UHF RFID tag dipole antenna design is optimized to reduce the consumption of conductive material. The optimized design is achieved by narrowing the width of the low current density areas. The proposed optimized dipole antenna design requires less amount of conductive ink to achieve the equivalent radiation efficiency level as the ideal copper-trace dipole antenna. The...

We present a new passive, over-the-horizon (OTH) radar system consisting of the transmitters for the HF radio station WWV and the dipole-antenna array that comprises the first station of the Long Wavelength Array (LWA), or “LWA1.” We demonstrate that these two existing facilities, which are operated for separate purposes, can be used together as a relatively powerful bistatic, HF radar, capable...

This dissertation focuses on the implementation of integrating pulse transmitter with wide-band antenna array into a chip by CMOS process for beam-forming in millimeter-wave (mm-wave) active imaging applications. Integrated antenna arrays in this research electrically control and steer radiated-pulse beams towards objects to be imaged. Among imaging approaches, active imaging method provides mo...

A compact printed dipole antenna with wide impedance bandwidth is proposed in this paper. This antenna consists of a pair of radiation metal arms and a microstrip-to-slotline transition structure. At the end of the feeding slotted line, a beveled slot with stepped connection structure is designed to realize an offset feeding structure for feeding the dipole antenna. By using the beveled offset ...