A vertical-strip-fed dielectric resonator antenna exhibiting broadband circular polarization characteristics is presented. A broad 3 dB axial ratio bandwidth (ARBW) is achieved by combining multiple orthogonal modes due to the use of a special-shaped dielectric resonator. The proposed antenna is fabricated to evaluate its actual performance capabilities. The antenna exhibits a measured 3 dB ARB...

A frequency tunable ring dielectric resonator antenna is presented in the paper. Advantages of the proposed antenna design are the wide range of adjustments and increasing of the radiation efficiency. The basic antenna characteristics, and also analysis of dependencies of the antenna’s central operating frequency, voltage standing wave ratio and radiation pattern versus the relative position of...

A compact dual-band antenna made of high dielectric constant substrate is studied. Embedding a higher dielectric cylindrical inside the substrate host cylindrical enhances the dual-band behaviour. The first part displays the characteristics of single CRDA as return loss, bandwidth and radiation pattern, then, the second part describes the aim of using an antenna, composed by the arrangement of ...

In this paper, we present a novel compact, coplanar, tag antenna design for metallic objects. Electrically small antenna has designed for a UHF RFID (860-960 MHz) based on a proximity-coupled feed through. Furthermore, two symmetrical Via-loaded coplanar grounds fed by a U-shaped inductively coupled feed through an embedded transmission line. This configuration results in an antenna with dimens...

This paper presents the design of a dual band rectangular Dielectric Resonator Antenna (DRA) coupled to narrow slot aperture that is fed by microstrip line. The fundamental TE111 mode and higher-order TE113 mode are excited with their resonant frequencies respectively. These frequencies can be controlled by changing the DRA dimensions. A dielectric resonator with high permittivity is used to mi...

This paper presents a novel defected ground structure-based slotted circular patch antenna for mm-Wave application. A with compact size of 10 mm×8 mm×0.75 mm is fabricated in the lab. The designed has 2 GHz impedance bandwidth that covers frequency range 42GHz to 44GHz. It achieves directional radiation pattern millimeter-wave applications and maximum realized gain 6 dBi at operating 42.65 GHz....

A textured dielectric substrate for a broadband miniature antenna was fabricated using a thermoplastic green machining. This substrate comprised of three steps with optimized distribution of a dielectric ceramic (Bi–Ba–Nd–Titania; BBNT) and an epoxy. At first, a thermoplastic compound, consisting of BBNT particles and thermoplastic binders, was machined precisely using a mini-computer numeric c...

A novel wideband rectangular dielectric resonator antenna (DRA) is proposed in this paper. A hybrid structure with an isolated dielectric resonator (DR) and an equivalent air-dielectric DR is introduced by lifting the resonator from the ground plane. The hybrid structure is excited by a slot-fed mechanism to obtain a smooth transition between each resonant mode. The resonant modes of the isolat...

We investigate the effects of antenna parameters on the radiation characteristics of a compact size Rectangular Microstrip Antenna suitable for mobile application. In the calculations of antenna parameters, resonant frequency is set at 3 GHz. In our investigations three low cost substrate materials, namely: (a) irradiated poly-guide with relative dielectric constant and loss tangent as 2.32, 0....

A miniaturized high-gain flexible unmanned aerial vehicle (UAV) antenna is presented in this study. The proposed basically comprised of three parts printed patch series, etched on dielectric substrate. And, a cable loaded the bottom coplanar waveguide (CPW) with asymmetric ground feeding structure employed to provide good impedance matching. surface current can achieve same phase for straight-l...