A novel method of enhancing cross-polarization discrimination (XPD) of a ${\pm }{45}^{\circ}$ dual-polarized base-station antenna, by addition of four parasitic elements placed in a square contour, is presented. First, it was established that high XPD at the broadside can be obtained by addition of four parasitic elements around a simple ${\pm }{45}^{\circ}$ dual-polarized base-station antenna. Second, we investigated the principle of wide beamwidth high XPD after studying magnitude currents on parasitic element, spacing between parasitic elements and length of parasitic elements. Finally, a ${\pm }{45}^{\circ}$ dual-polarized base-station antenna was designed, fabricated and measured. Measurement results are in good agreement with the results of simulation in terms of radiation pattern, gain, and Voltage Standing Wave Ratio (VSWR). In particular, the enhanced XPD is more than 20 dB at the boresight and more than 10 dB within ${\pm }{60}^{\circ}$ of the main lobe at the horizontal plane.

A Plus/Minus 45 Degree Dual-Polarized Base-Station Antenna With Enhanced Cross-Polarization Discrimination via Addition of Four Parasitic Elements Placed in a Square Contour

A novel monopole antenna with crinkle fractal-structure for multiband applications is presented. In this paper adding crinkle fractal leads to increasing the number of resonance frequency. The operating frequencies of the proposed antenna are 1.780/3.520/5.260 GHz. The prototype of the proposed antenna is fabricated on an inexpensive FR-4 substrate. The size of the proposed antenna is 14 × 14 mm 2 which has crinkle shape strip on top side. The radiation pattern of the proposed antenna is nearly omnidirectional. The simulated and the experimental results are in acceptable agreement with each other and confirm good performance for the offered antenna.

A novel small triple-band monopole antenna with crinkle fractal-structure

A novel dual-band circularly polarized multilayer microstrip antenna for 3.5/5.2-GHz applications is presented. A stacked-patch configuration is used for the compact dual-band antenna design, and good circular polarization (CP) performance is achieved by adjusting the size of truncated corners and inserted slits of the hexagonal patches. The antenna generates CP radiation at 3.5 and 5.18 GHz with broadside radiation patterns and very low axial ratio. The measured peak gains of the antenna are 3.8 and 5.4 dBi at the lower and upper bands, respectively. The antenna occupies a small radiating area of 19.2 × 16.6 mm2.

Compact LTCC Dual-Band Circularly Polarized Perturbed Hexagonal Microstrip Antenna

A coplanar waveguide (CPW)-fed, multi-band, trapezoidal monopole antenna with linear and circular polarization realized in a single substrate layer is presented. It is demonstrated that, polarization of the antenna originate from resultant surface currents controlled by the physical aspects of the trapezoid. A prototype fabricated on Rogers RO4350B® substrate with dielectric constant 3.48 occupies an overall dimension of 55 × 50 × 0.762 mm3. The antenna provides a 2:1 VSWR bandwidth of 80% (from 1.55 GHz to 3.60 GHz) and 8% (from 5.13 GHz to 5.55 GHz) in the first and second band respectively. It also exhibits a 3 dB axial ratio bandwidth of 8% (from 2.21 GHz to 2.40 GHz) in the IEEE 802.16e WiMAX band. In addition, the antenna facilitates quasi omnidirectional coverage along with moderate gain and efficiency. A parametric study of the key parameters is also performed and the mechanism of polarization is described through surface current analysis.

Coplanar Waveguide-Fed Uniplanar Trapezoidal Antenna With Linear and Circular Polarization

A $2 \times 2$ dual-polarized (DP) aperture-coupled microstrip antenna array with high isolation, broadband, and low cross polarization for Ku-band is proposed based on the quasi-substrate integrated waveguide (Q-SIW) technology. The proposed microstrip antenna array is excited by two orthogonal four-way corporate (parallel) feed networks, which not only has a multistage structure with broadband but also provides pairs of differential outputs. The Q-SIW structure, composed of several reflectors and substrate integrated metal pillars, is used to increase the bandwidth, improve the isolation, and reduce the influence of feed network. The measured and simulated results show that the DP array exhibits an impedance bandwidth of 26.37% for vertical port and 27.77% for horizontal port. The cross polarization level is better than −34 dB and −40 dB for two ports, and the isolation between the two ports is above 32 dB.

A Novel Broadband and High-Isolation Dual-Polarized Microstrip Antenna Array Based on Quasi-Substrate Integrated Waveguide Technology

A novel trident-shaped dual-band CPW-fed monopole antenna for PCS/WLAN applications is presented. By inserting two pairs of symmetrical strips in the middle strip of the trident-shaped antenna, dual-frequency operating bands with 10 dB return-loss bandwidths of 33.7 % , ranging from 1.80 to 2.53 GHz, and of about 1100 MHz centred at 5.5 GHz have been achieved. They cover the required bandwidths of the PCS band (1.85 1.99 GHz) and WLAN bands (2.4 2.484 and 5.15 5.825 GHz). Also, good radiation patterns, and 3.6 and 9.1 dBi peak antenna gains for the lower (2.2 GHz) and upper (5.5 GHz) bands have been measured.

Trident-shaped dual-band CPW-fed monopole antenna for PCS/WLAN applications

A novel type of printed and doubled-sided dipole antenna with multiband operation for wireless local area networks and worldwide interoperability for microwave access is presented. The antenna is composed of several symmetrical branch strips dipoles which are employed as resonators for multiband operation and a modified rectangular ground plane as a reflector. Prototype of the proposed antenna has been constructed and experimentally studied. The measured results of the tri-band not only explore wide −10 dB impedance bandwidths of 20, 14, and 15% at the operating bands of 2.5, 3.5, and 5.5 GHz respectively, but also show good agreement with the numerical predictions. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1019–1022, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26705

Multiband printed and double-sided dipole antenna for WLAN/WiMAX applications

A coax-feed dual-polarised patch antenna with low cross-polarisation and high port isolation is presented. The proposed antenna contains two pairs of narrow slots along the diagonals and two pairs of T-shaped slots along the centrelines, which change the path of the current and keep the cross-polarisation under -38-dB. By introducing two short pins, the isolation between the two ports remains more than 40-dB in the whole bandwidth. Moreover, the proposed antenna achieving a 10-dB return loss bandwidth of 2.15-2.72-GHz has a compact structure, thus making it easy to be extended to form an array, which can be used as the base station antenna for WiMAX applications.

Dual-polarised patch antenna with low cross-polarisation and high isolation for WiMAX applications

A compact coplanar waveguide (CPW)-fed triple-band planar antenna applied to WALN and WiMAX applications is proposed The antenna, which occupies an overall dimension of 38 × 36 × 16mm3, is simply composed of a U-shaped radiating patch and a U-shaped open stub It has good omnidirectional radiation patterns in the azimuth plane and reaches 23 dBi at both 245 GHz and 35 GHz, 35 dBi at the band of 52 GHz and 37 dBi at the band of 58 GHz The designed antenna is simulated by HFSS software, and a good agreement with experimental results is demonstrated

Dual-Band Antenna with U-Shaped Open Stub for WLAN/WIMAX Applications

Computational model of grid cells based on back-propagation neural network

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

B. Li

Author Tools

Chat about Author