circularly-polarized antenna is built based on new SIW(substrate integrated waveguide)structure which contains cavity-backed resonator and a conventional polarized ring with twosquare slits in inner and outer ring that differ 90° at position and is proposed for right-handedcircular polarization (RHCP) and fabricated in two separate layers. A broadband impedancebandwidth of 13.9% and a RHCP axia...

Abstract For any wireless communication, the antenna plays a very important role. The request for this technology is reduced size, weight, and cost with low profile, high performance, return loss (RL). To meet these requirements, microstrip patch (MPA) can be used. This research represents design manufacture of MPA 2.4 GHz applications RL perfect voltage standing wave ratio (VSWR). Computer sim...

<p class="Abstract"><span>The design, simulation, and analysis of a 3.5 GHz rectangular microstrip patch antenna (RMPA) have been carried out for this research article. The substrate material employed the design is lossy form fr-4, which has thickness 0.5 mm, dielectric permittivity 4.3, loss tangent 0.0005, respectively. receives power through feeding line with an impedance 50 Ω. s...

Microstrip antennas are that often applied because of their simple structure and easy to apply. The purpose the experiment was design analyze results microstrip in CST applications with a frequency 10.5 GHz. Experiments used single patch antennas, 1 x 2 arrays using patches 4 antenna patches. Each series has different characteristics return loss, gain, VSWR, axial ratio. Based on these experime...

Two metamaterial-based linear phased array antennas with improved wide-angle scanning bandwidth are designed in this study. Metamaterial antenna element consists of a metamaterial patch, periodic metal strips, distributed strips and slot coupling feeding structure. The the is by loading strips. Wide-angle arrays attributed to For an E-plane array, central has relative 30.0% (4.33-5.86 GHz) for ...

Abstract—This paper presents a novel wideband planar dipole antenna with parasitic patches. Of which, acting primarily as directors, the parasitic elements aim to improve the radiation patterns in terms of gain especially at the higher frequencies. For verification, the proposed novel structure was fabricated and measured. The proposed antenna is well-matched with achieved VSWR < 2 and has a go...

ii Table of Contents Table of Contents ________________________ ii I. Abstract ________________________ iii II. Introduction ________________________ 1 A. Fractal Generator Review ________________________ 2 B. Abstract This paper studies the miniaturization of dipole antennas by using fractal tree structures as the elements. It studies fractal density and elevation angle to see how these factor...

A compact two element MIMO (Multiple Input Multiple Output) system is proposed using a multi slot patch antenna employing polarization diversity. The proposed MIMO system offers improved bandwidth, return loss and isolation characteristics. The system resonates at 5.35GHz and 5.81GHz frequencies for VSWR≤2, which can be used for 4G & WiMAX applications. The simulation results of return loss, mu...

This report describes the design of a two-stage broadband low-noise-amplifier (LNA) for the frequency range from 3 GHz to 9 GHz, using GaAs MESFETs with an ft of 20 GHz. The passive components were implemented with microstrips. In the frequency band of operation, the achieved noise figure (NF) is within 0.5 dB from the minimum NF of a single transistor, the power gain is 15 dB, flat within 1 dB...

This paper investigate some methods for converting single band antennas to multiband antennas so that all single band antennas convert in multiband antennas and gives multiband facility without increasing the cost of manufacturing. Simulation is performing on Ansoft HFSS and corresponding result are shown by figures. Impedance bandwidth, VSWR and Return loss are observed for the proposed antenn...