A novel broadband horizontally polarized (HP) omnidirectional planar antenna is developed for mobile communications. The proposed antenna consists of four printed arc dipoles that form a circular loop for HP omnidirectional radiation. A broadband feeding network which includes four broadband baluns and an impedance matching circuit is designed to excite the four arc dipoles. An eight-element li...

A sensor network consisting of a number of palm-sized nodes with small electric and magnetic sensors has been proposed to monitor local electromagnetic activities in space plasmas. In the present study, a compact loop antenna system is designed and fabricated for use in sensor nodes that can capture magnetic vector fields from ELF to MF frequencies. The performance of the developed system is sh...

The radiation characteristics of a rectangular loop loaded at its mid-point with a resistance equal to the radiation resistance, and fed by DC pulses, are derived and compared with measurements. In particular, the time variation of the electromagnetic pulse radiated by this antenna, and also of the voltage pulse induced at the terminals of a similar receiving antenna, is derived. The relationsh...

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...

This article presents the analysis and investigation of the effect of loading a horn antenna with a double square loop frequency selective surface (FSS) of finite size. It is fabricated on Rogers RT5870 (lossy) of relative permittivity 2.33, thickness 1.575mm and loss tangent 0.0012. This structure is called a filtering antenna (filtenna). Basically it is applied for filtering and minimizing th...

This paper reports the design of a wide band planar fed, planar conical loop Antenna. Parametric studies have been carried out to arrive at the optimum antenna dimensions to have a wide impedance bandwidth (VSWR<2). Experimental results confirmed the wide impedance bandwidth.