Bandwidth And Gain Enhancement Of Ultra-Wideband Monopole Antenna Using MEBG Structure

Two designed of Ultra-Wide Band (UWB) monopole antenna with/without Electromagnetic Band Gap (MEBG) mushroom structure has been designed and analyzed. EBG structure is used in UWB monopole antenna to enhance the gain and the bandwidth as well, several main parameters of the proposed antenna are discussed such as return loos, gain, radiation pattern. First design of monopole antenna gave the bandwidth without EBG of 8.069 GHz (2.77-10.84 Ghz) while the maximum gain is 4.4 dB. Whereas second design with EBG gives wide huge bandwidth of 23.33 GHz (2.67-26 GHz) and higher maximum gain 5.8 dB. The highest impedance bandwidth attained is 161% considers VSWR 2:1. The proposed antenna will serve different applications such as Bluetooth, cellular systems and satellite communication and 5 G. The greater bandwidth also offers the antenna low mutual coupling rather than the antenna without EBG. FR4 substrate is used here with comparative permittivity 4.4. At the end of this study, physical model and measured results are presented and the measured results well match with the simulations

Pattern reconfigurable dielectric resonator antenna using capacitor loading for internet of things applications

This research study presents a cube dielectric resonator antenna (DRA) with four different radiation patterns for internet of things (IoT) applications. The various radiation patterns are determined by the grounded capacitor loading to reduce interference. The DRA is constructed of ceramic material with a dielectric constant of 30 and is fed via a coaxial probe located in the antenna’s center. Capacitors are used to load the four parasitic microstrip feed lines. Each pattern of radiation is adjustable by adjusting the capacitors loading on the feed line. The proposed antenna works at 3.5 GHz with -10 narrow impedance bandwidth of 74 MHz

High efficiency dielectric resonator antenna using complementary ring resonator for bandwidth enhancement

A complementary ring resonator (CRR) technique is used to improve the bandwidth of the dielectric resonator antenna (DRA) while maintaining other parameters such as the efficiency and the gain. Parametric experiments were conducted in order to demonstrate the suggested antenna's working guideline. The bandwidth of the proposed Antenna is boosted by 769 percent as compared to the antenna without the CRR technique. The proposed antenna has high efficiency of 94 percent and a tiny dimension of around 30×30×12 mm. The suggested antenna has a frequency range from 2.61 to 3.65 GHz, which is suitable for S-band applications. Computer simulation technology (CST) was used to implement the design and obtain the results

A Compact UWB FSS Single Layer With Stopband Properties For Shielding Applications

A compact and simple structure of ultra-wideband (UWB) frequency selective surface (FSS) single layer was formed to obtain stopband characteristics in this study. The proposed FSS is made of a modified square loop (MSL) structure with an electrical size of 0.15λ0 ×0.15λ0 × 0.041λ0 and is printed on a single side of the dielectric FR4 substrate. To determine the FSS unit cell structure’s behaviour, an equivalent circuit model (ECM) was introduced. Based on the observations, the designed FSS achieved a bandwidth of 10GHz (2.6-12.6 GHz) with -10dB of return loss performance. Hence, the proposed FSS was identified to contribute towards stable angular stability for transverse electric (TE) and transverse magnetic (TM) polarisations from 0° to 45°. Overall, the simulated results were in high-grade harmony compared to the measured result