Rahul Tiwari

A Compact Dual-Polarized MIMO Antenna With Distinct Diversity Performance for UWB Applications

In this letter, a simple compact dual-polarized ultrawideband (UWB) multiple-input–multiple-output (MIMO) antenna is presented with the circularly polarized band for WiMAX (5.5xa0GHz) and WLAN (5, 5.2 GHz) applications. The antenna parameters such as reflection coefficient, diversity performance, gain, axial ratio, and isolation have been studied on a fabricated prototype of the proposed antenna. The 3 dB axial-ratio bandwidth (ARBW) of 34.38% along with isolation between two ports has been achieved by introducing a rectangular vertical arm (I-parameter) in the ground plane. To enhance the isolation and –10xa0dB impedance bandwidth, L-shaped radiators have been incorporated in the rectangular feeds. The –10 dB impedance bandwidth of the proposed antenna is 112.05% with isolation >17 dB. The envelope correlation coefficient is less than 0.01 (using S-parameter) and less than 0.15 (using far-field radiation pattern) in the entire operational bandwidth. The gain of the proposed antenna varies from 1.2 to 4.9xa0dBi. The performance of the proposed antenna makes it a suitable candidate for use in portable UWB applications as well as in wireless communication systems.

Design Slotted Patch Antenna on Layer 1. 6mm

purposes of this paper are to describe analytical and experimental design approaches for Rectangular Microstrip Patch Antenna for improvement of Bandwidth and Return Loss. This paper proposes a Conventional Rectangular patch antenna and Rectangular Slot as on Patch antenna. The simulation results show that an antenna with Rectangular Slot has improved bandwidth and return loss significantly by changing the frequency. Experimental results indicate that the impedance bandwidth, defined by -10dB return loss, of the proposed wide slot antenna can reach operating bandwidth of 218MHz and Return Loss -25.74dB through rectangular slotting in conventional rectangular while conventional rectangular Microstrip patch antenna bandwidth is 57MHz and Return Loss is 18.96dB. KeywardsRectangular Microstrip patch Antenna, Return Loss.

Design and Simulation of Slotted Rectangular Microstrip Patch Antenna

This paper presents the design of compact slotted rectangular microstrip patch antenna for operates 5 GHz. The proposed antenna is designed on RT duroid substrate with dielectric constant of 2.2 and fed with 50 ohms microstrip line. Further DGS (Defected Ground Structure) technique is used to increase the gain of the antenna. Bandwidth is enhancing by introducing the slot in the rectangular patch antenna. The characteristics of the proposed antenna have been studied with the help of HFSS (High Frequency Structure Simulator) software. HFSS is a high performance full wave electromagnetic (EM) field simulator. Ansoft HFSS employs the Finite Element Method (FEM). The design targets the frequency band (5.180 – 5.825 GHz) being used in various wireless communication systems, such as satellite communication, radio altimeters etc. The final antenna produced 720MHz bandwidth,1.11 VSWR and 7.27dB gain at frequency 5.39 GHz. General Terms In this paper slotting has to be done to enhance the bandwidth.

Design and analysis of a compact microstrip antenna using shorting pin for 5 GHz band

A compact microstrip patch antenna (RMPA) using shorting pin is based on the introducing rectangular slot in the ground plane is proposed for useful current miniaturized wireless communication system and designed in this paper. This modified antenna to have characteristics of wideband operation, enhance bandwidth, along with reducing the size and improved gain. A meandered probe-fed rectangular shaped slot coupled with horizontal slots on a ground layer with a dimension of 18 × 21 × 1.6 mm3 having dielectric material substrate (εr=4.4). The main purpose of this work is to propose a wideband and improved gain antenna for mobile WiMAX, Wi-Fi/WLAN as well as military applications. The simulated results show that, the proposed antenna has achieved wider bandwidth with satisfactory gain by introducing probe fed with shorting pin in the assistant of partial ground plane.