A composite aperture has been conceived to excite cylindrical dielectric resonator antenna (CDRA) simultaneously with two different modes, resulting in broadside radiations at adjacent bands. Threefold objectives of this investigation includes: (i) realize HEM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">12δ</sub> mode a practical CDRA without involving any unwanted hybrid mode; (ii) explore type feed, which serves as equivalent magnetic and...

A new and physically realizable feed employing a dielectric resonator (DR) has been conceived demonstrated for HEM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">12δ</sub> mode in cylindrical antenna (CDRA). This indeed enables realizing an improved version of dual-band dual-mode (DRA) with attractive broadside radiation along wide bandwidth characteristics. It comprises two-element stacked geometry, where the lower element is excited by...

A dual-mode dual-band cylindrical dielectric resonator antenna (CDRA) bearing a unique combination of improved radiation and input impedance characteristics has been reported in this letter. An innovative concept twin aperture with single microstrip feed successfully explored. It demonstrates uniform excitation the broadside radiating HEM11 1<<2 (1+) modes operating at S- C bands. Experimental studies set prototypes ensure 10% matching bandwidth each resonance 6.3 dBi 9 peak gains,...

An unconventional resonant mode has been explored in a cylindrical dielectric resonator antenna (CDRA). Shaped aperture used to excite the DRA. This results strawberry shaped radiation patterns with highly linear fields and 5.4 dBi peak gain. About 130° half-power beamwidth appears be its specialty.

A new design mechanism has been explored to realise a single higher mode driven wideband dielectric resonator antenna (DRA). It targets an aperture coupled cylindrical DRA operate in HEM 11Δ mode, which indeed is first‐order repetitive form of 11 δ mode. Innovative engineering realised on the body as mode‐filtering technique maintain modal purity and hence, radiation uniformity. C‐band prototype experimentally verified indicating much 24% impedance bandwidth with 8.5 dBi maximum gain. This...

In this paper we have investigated the excitation of HEM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">21δ</sub> mode, another higher order mode in Cylindrical Dielectric Resonator Antenna (CDRA) by using a surface short probe feeding technique. The modal field variation due to metallic perturbations for configuration has also been presented here. co-polarized gain enhanced 2dBi H-plane with symmetrical E-field distribution but case E-plane is...

A new feed to excite a cylindrical dielectric resonator antenna (CDRA) with HEM12δ mode has been conceived and demonstrated in this paper for the first time. This uses an aperture-fed as CDRA results much improved bandwidth along attractive radiation characteristics. As 7.6 dBi peak gain documented. investigation adds feeding technique satisfying boundary condition required modal fields appears superior alternative earlier techniques.

A multi-frequency cylindrical dielectric resonator antenna (CDRA) excited with three different modes of similar broadside radiation patterns has been explored. Dominant HEM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11δ</sub> and higher order xmlns:xlink="http://www.w3.org/1999/xlink">111</sub> xmlns:xlink="http://www.w3.org/1999/xlink">12δ</sub> are simultaneously in a conventional CDRA structure radius to height ratio<;1.0. prototype...

A composite dual-aperture feeding technique for conventional cylindrical dielectric resonator antenna (CDRA) has been proposed to design dual-band using HEM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11δ</sub> and xmlns:xlink="http://www.w3.org/1999/xlink">11Δ</sub> modes. These two modes with similar kind of electric field patterns have excited simultaneously in a CDRA 7 dBi 9.4 peak gains respectively. This was achieved at operating...

The far-field radiations from corner-cut waveguide with obstacle in the aperture have been investigated two principal planes. Besides effect of wire obstacle, angular symmetrical cuts corners control H-plane beamwidth without any substantial change E-plane. Radiation pattern measurements are shown for a number cuts, α, and parameter K. half power beam width is broadest 40° &lt; α 500° K equal to 0.5