In this study, a compact semi-circular metamaterial-inspired dual-band antenna is presented. The total antenna size is 0.22 o × 0.19 o × 0.02 o. Simulation results show dual-band operation with an impedance bandwidth of 2.7% for first band (resonant at 4.1 GHz) and 25.7% for second band (resonant at 6.15 GHz). The proposed compact metamaterialinspired antenna shows monopole-like radiation patte...

The response of antenna-coupled thin-film Ni-NiO-Ni diodes to 633-nm helium-neon laser radiation is investigated. Although these detectors and their integrated dipole antennas are optimized for the detection of mid-infrared radiation, a polarization dependence of the measured response to visible radiation is observed. The strongest signals are measured for the polarization parallel to the dipol...

This paper presents a top-hat sleeve monopole antenna for ultra-wideband (UWB) applications. The proposed antenna comprises a stem, a dielectric coat, and a top hat sleeve. A modal expansion technique used in cylindrical coordinate system is applied to study the impedance and radiation characteristics of the antenna. Influences of varying parameters of the antenna on impedance matching and radi...

the possibility of terahertz generation has been investigated from a photoconductive switch based on gaas, gated by a femtosecond laser. the emission properties of photoconductive antenna (pca) with low-temperature-grown (lt) gaas have been studied. in such gaas materials presence of the charged defects induces a redistribution of the electric field between the antenna electrodes. this effect h...

This paper presents an experimental Phased Array Antenna System operating at 10 GHz. Geometry of the antenna array is cylindrical. Antenna element excitation phases are adjusted at the intermediate frequency stage. Antenna element excitation amplitudes are taken to be constant. A least squares technique is used for phase computation and radiation pattern synthesis. The obtained radiation patter...

This paper presents a compact sized inset-fed rectangular microstrip patch antenna embedded with double-P slots. The proposed antenna has been designed and fabricated on ceramic-PTFE composite material substrate of high dielectric constant value. The measurement results from the fabricated prototype of the antenna show -10 dB reflection coefficient bandwidths of 200 MHz and 300 MHz with center ...

This article presents the design of rectangular microstrip antenna. The prototype antenna is designed and fabricated on FR4 substrate of dielectric constant Єr = 4.4 and thickness h = 1.66 mm. The proposed antenna is excited using co-axial probe feed. The experimental result of rectangular-shaped microstrip antenna exhibits the excellent radiation characteristic corresponding to impedance bandw...

⎯The handheld terminals antenna should have a small size, sufficient gain and big bandwidth. In this paper, a compact planar inverted-L diversity antenna for handheld terminals is proposed. Three diversity antennas operating at 2.15 GHz are designed and the effect of important parameters of the proposed antenna is measured. The isolation is found to be better than 13 dB, the usable bandwidth is...

A new design of non-planar magneto-electric monopole antenna is proposed and presented. This antenna consists of a novel design of electric monopole with dual shaped feed line design and possesses 61.5% impedance bandwidth, from 4.5GHz–8.5GHz. The antenna exhibits stable omnidirectional radiation pattern with almost identical E-plane and H-plane radiation patterns and also provides a peak gain ...

An extreamly large scale periodic array antenna is required for the power transmission in the space solar power systems. Analysis of the array antenna is important to estimate radiation property of the array antenna, but a full-wave analysis requires too much computer memory and too long CPU time. In order to overcome this difficulty, the impedance extension method is proposed as a method of ap...