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In this paper, a compact RDRA has been introduced in which notched chamfered technique with edge metal plate on one side of DRA is used to enhance the bandwidth. The probe feeding is used to excite the DRA as it can be easily optimized by adjusting probe height and its location. The proposed antenna has a simulated impedance bandwidth of 89.20% wide i.e. 3.9GHz to 10.18GHz. (S11 < − 10dB) and 3dB...
In this paper a novel circular patch loaded Koch snowflake fractal DRA is presented. The use Koch snowflake fractal increases the impedance bandwidth by increases the surface area to volume ratio. The circular patch tunes the resonant frequency towards lower frequency. The Proposed antenna offers a bandwidth of 57.5% (2.61GHz–4.72GHz) for reflection coefficient S11<−10dB. The antenna has a peak...
A compact wideband Triangular Dielectric Resonator Antenna (TDRA) is analyzed and simulated. Perforations improve bandwidth by letting down the quality factor. The perforations are array of symmetrical circular-shaped slots drilled uniformly on the TDRA. On proposed the optimal size of slots and distance between two consecutive slots, the fundamental modes of the TDRA is preserved. This aids in making...
This paper presents a novel wideband Koch snowflake DRA with array of circular slots. The use of periodic slots shifts the resonant frequency due to inward material perturbation on the fractal DRA. It further reduces the effective dielectric constant of the DRA which increases the impedance bandwidth of DRA. Moreover, the bandwidth is further increased by grounding one of the slots. The Proposed antenna...
In this paper, a novel Minkowski Half-hexagon Notched Dielectric Resonator Antenna (MHNDRA) is proposed to increase the surface to volume ratio, bandwidth and operate at high-order modes to achieve enhanced gain. The material selected for the Dielectric Resonator(DR) is Rogers RO3006,which has a dielectric constant of 6.15 and exited by a coaxial probe. The proposed antenna offers a wide impedance...
A miniaturized wideband bandpass filter is proposed in this paper. The proposed filter is designed using half wavelength line loaded with Short Circuit Stubs Loaded Square Loop (SCSLSL). This novel structure generates three poles to generate a wide passband. A transmission zero in the upper passband is generated to obtain high skirt factor and wide stopband. This compact wideband bandpass filter with...
In this paper, Koch snowflake fractal geometry on a Cylindrical Dielectric Resonator antenna (CDRA) is designed and analyzed up to two iterations. The antenna has been excited by a coaxial probe placed at an offset distance from the center. Self-similar pattern of fractal geometry has been utilized to excite higher order modes. The proposed antenna gives a wide impedance bandwidth of 56.5% at a fundamental...
New wideband quadrature rectangular dielectric resonator antenna is designed and proposed. The square shaped slots are drilled to obtain wide impedance bandwidth by reduction of effective dielectric constant. Metallization is incorporated along the edges to make the structure compact by removal of dielectric in the direction of symmetry plane of electric field. It results in volume reduction from...
New wideband quadrature rectangular dielectric resonator antenna is designed and proposed. The square shaped slots are drilled to obtain wide impedance bandwidth by reduction of effective dielectric constant. Metallization is incorporated along the edges to make the structure compact by removal of dielectric in the direction of symmetry plane of electric field. It results in volume reduction from...
A compact Rectangular Dielectric Resonator Antenna is designed using perforations (symmetrical array of square slots) and edge grounding. The perforations improve impedance bandwidth by lowering down the quality factor. The perforations are selected in such a manner that fundamental TE111 mode is preserved in the modified perforated structure. The symmetrical electric field distribution of fundamental...
A novel S shaped dielectric resonator antenna for wireless communication is proposed. The proposed configuration is achieved by making two symmetrical U shape notches on conventional rectangular dielectric resonator antenna (RDRA). It lowers down the quality factor and thus, improves bandwidth significantly. The optimum dimension of these notches excites the fundamental TE111 like mode of the conventional...
This paper investigates the effect of loading a Swastika shaped Defected Ground Structure (DGS) on a Hemispherical DRA. The HDRA of εr=9.2, radius r=2.54 cm (1″) resonates at 1.816 GHz with a gain of 6 dBi. The bandwidth of operation (S11<−10 dB) of the HDRA is 10% at the resonant frequency. The optimized dimensions, calculated through rigorous parametric sweeps, of the swastika DGS are a=0.54,...
In this paper, a novel Sierpinski Carpet Fractal based Photonic Band Gap (PBG) structure is proposed. The novel fractal based PBG offers better band gap response as compared to the square lattice shaped PBG. The application of the novel PBG on Hemispherical Dielectric Resonator Antenna (HDRA) significantly improves the peak gain of the antenna from 6 dBi to 10 dBi at 2.05 GHz and the impedance bandwidth...
Rectangular Dielectric Resonator Antenna (RDRA) for wideband and high gain applications is proposed. Self similar and space filling property of fractal is exploited to improve impedance bandwidth while gain is improved by drilling array of symmetrical slots. The magnetic surface current distribution is shown to validate gain improvement. The dielectric material used is Rogers 6010 having a dielectric...
In this paper, a novel sierpinski carpet fractal based Photonic Band Gap (PBG) structure has been proposed. Whereas the square lattice shaped PBG consisting of drilled holes of radius r1=0.8 cm placed at a periodicity of p=3 cm, offers a band gap from 1.6 GHz to 1.95 GHz for a dielectric material of εr=9.8, the addition of secondary holes of radius r2=0.15 cm placed at a distance of δ=1 cm, from the...
In this paper, a novel investigation of a Hemispherical Dielectric Resonator Antenna (HDRA) loaded with a Photonic Band Gap (PBG) structure is carried out. The HDRA is designed of material of permittivity εr=9.2 and is resonant at 1.816 GHz offering 10.4% impedance bandwidth and a peak gain of 6 dBi. The PBG designed from a dielectric of εr=9.8, is arranged in a square lattice and offers a band gap...
In this paper, a novel Sierpinski Carpet Fractal based Photonic Band Gap (PBG) structure is proposed. The parasitic holes drilled to form the fractal geometry improve the band gap performance. The application of the novel PBG on Hemispherical Dielectric Resonator Antenna (HDRA) improves the impedance bandwidth of operation (S11<-10 dB) from 10.4 % to 21% at 1.82 GHz. The antenna is excited by a...
In this paper, a strip fed wideband rectangular dielectric resonator antenna using perforations has been proposed. The empirical formula is presented to find the effective dielectric constant after perforation, which comes out to be 23 % lower than the original dielectric constant. This improves Bandwidth (BW) and reduces overall weight of the antenna. Both the modes i.e. TE111 and TE131 are preserved...
In this paper, a novel pierced rectangular dielectric resonator antenna for wideband communication systems has been proposed. The effect of piercing array of square shaped slots and further, providing an air gap between dielectric resonator element and ground plane results in the lowering of ‘Q’ factor and enhancement of the bandwidth S11 < −10 dB because both are inversely related. Numerical analysis...
In this paper, a novel Hemispherical Dielectric Resonator Antenna (HDRA) with a rectangular slot and rectangular shaped Defected Ground Structure (DGS) is proposed and investigated. A total of three slots are etched as DGS. The central slot is a pierce through slot, protruding from the ground plane to the HDRA. In doing so, the bandwidth of operation increases from 10.4% to 23% (S11 < −10 dB) with...
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