<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1665-6423</journal-id>
<journal-title><![CDATA[Journal of applied research and technology]]></journal-title>
<abbrev-journal-title><![CDATA[J. appl. res. technol]]></abbrev-journal-title>
<issn>1665-6423</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias Aplicadas y Tecnología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-64232015000500526</article-id>
<article-id pub-id-type="doi">10.1016/j.jart.2015.10.006</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Design of triple-layer double U-slot patch antenna for wireless applications]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Darimireddy]]></surname>
<given-names><![CDATA[Naresh Kumar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramana Reddy]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mallikarjuna Prasad]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Lendi Institute of Engineering & Technology Department of ECE ]]></institution>
<addr-line><![CDATA[Vizianagaram AP]]></addr-line>
<country>IN</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,MVGR College of Engineering Department of ECE ]]></institution>
<addr-line><![CDATA[Vizianagaram AP]]></addr-line>
<country>IN</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,JNTUK Department of ECE ]]></institution>
<addr-line><![CDATA[Kakinada ]]></addr-line>
<country>IN</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<volume>13</volume>
<numero>5</numero>
<fpage>526</fpage>
<lpage>534</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-64232015000500526&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-64232015000500526&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-64232015000500526&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Many techniques have been proposed to design microstrip patch antennas with multiband characteristics. In the proposed antenna design, a combination of dual U-slot and multiple layers is used to get multiple bands and wide bandwidth. A multiband triple-layer probe fed double U-slot microstrip patch antenna for next generation wireless applications is proposed in this paper. Parametric studies of antenna structure with double U-slot, variation of feed position, and also with multiple layers are presented. The proposed antenna is fabricated and tested. The simulation and experimental results are presented. The proposed antenna provides triple bands at 1.6 GHz, 1.9 GHz and 3.8 GHz and a bandwidth of 600 MHz for a substrate thickness of 1.6 mm and 1.8 GHz, 2.2 GHz and 4.8 GHz and a bandwidth of 800 MHz for a substrate of 0.6 mm thickness.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Triple-layer structure]]></kwd>
<kwd lng="en"><![CDATA[Microstrip antenna]]></kwd>
<kwd lng="en"><![CDATA[Probe feed]]></kwd>
<kwd lng="en"><![CDATA[Multiband]]></kwd>
<kwd lng="en"><![CDATA[Slot antenna]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Balanis]]></surname>
<given-names><![CDATA[C.A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Antenna theory analysis and design]]></source>
<year>2005</year>
<edition>3rd ed.</edition>
<publisher-name><![CDATA[Wiley Publication]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="">
<article-title xml:lang=""><![CDATA[Investigation of multi layer probe-fed microstrip antenna for ultra wideband operation]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ghassemi]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Neshati]]></surname>
<given-names><![CDATA[M.H.]]></given-names>
</name>
<name>
<surname><![CDATA[Rashed-Mohassel]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Proceedings of Asia-Pacific microwave conference]]></source>
<year>2007</year>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="">
<article-title xml:lang=""><![CDATA[Accurate modeling of multi-layer microstrip antennas]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hoorfar]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Proceedings of Asia-Pacific microwave conference]]></source>
<year>1992</year>
<page-range>207-10</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Single-layer single-patch wideband microstrip antenna]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Huynh]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[K.-F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Electronics Letters]]></source>
<year>1995</year>
<page-range>1310-2</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kraus]]></surname>
<given-names><![CDATA[J.D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Antennas]]></source>
<year>1988</year>
<edition>2nd ed.</edition>
<publisher-loc><![CDATA[New York, NY ]]></publisher-loc>
<publisher-name><![CDATA[McGraw-Hill]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="">
<article-title xml:lang=""><![CDATA[Design of a triple layer microstrip patch antenna]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kushwah]]></surname>
<given-names><![CDATA[R.P.S.]]></given-names>
</name>
<name>
<surname><![CDATA[Dubey]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Singhal]]></surname>
<given-names><![CDATA[P.K.]]></given-names>
</name>
</person-group>
<source><![CDATA[2006 IEEE international workshop on antenna technology, IWAT 2006 &#8211; Small antennas and novel metamaterials, 2006]]></source>
<year>2006</year>
<page-range>49-52</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Impedance matching of a dual-frequency microstrip antenna with an air gap]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[C.S.]]></given-names>
</name>
<name>
<surname><![CDATA[Nalbandian]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
</person-group>
<source><![CDATA[IEEE Transactions on Antennas and Propagation]]></source>
<year>1993</year>
<volume>41</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>680-2</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[On the use of U-slots in the design of dual- and triple-band patch antennas]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[K.F.]]></given-names>
</name>
<name>
<surname><![CDATA[Luk]]></surname>
<given-names><![CDATA[K.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Mak]]></surname>
<given-names><![CDATA[K.M.]]></given-names>
</name>
<name>
<surname><![CDATA[Yang]]></surname>
<given-names><![CDATA[S.L.S.]]></given-names>
</name>
</person-group>
<source><![CDATA[IEEE Antennas and Propagation Magazine]]></source>
<year>2011</year>
<volume>53</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>60-74</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The versatile U-slot patch antenna]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[K.F.]]></given-names>
</name>
<name>
<surname><![CDATA[Steven Yang]]></surname>
<given-names><![CDATA[S.L.]]></given-names>
</name>
<name>
<surname><![CDATA[Kishk]]></surname>
<given-names><![CDATA[A.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Luk]]></surname>
<given-names><![CDATA[K.M.]]></given-names>
</name>
</person-group>
<source><![CDATA[IEEE Antennas and Propagation Magazine]]></source>
<year>2010</year>
<volume>52</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>71-88</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Raju]]></surname>
<given-names><![CDATA[G.S.N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Antennas and wave propagation]]></source>
<year>2005</year>
<publisher-loc><![CDATA[New Delhi ]]></publisher-loc>
<publisher-name><![CDATA[Pearson Education (Singapore) Pvt. Ltd.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ramesh]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Prakash]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Inder]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Apisak]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<source><![CDATA[Microstrip antenna design handbook]]></source>
<year>2001</year>
<publisher-loc><![CDATA[Boston, London ]]></publisher-loc>
<publisher-name><![CDATA[Artech House Publications]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="">
<article-title xml:lang=""><![CDATA[Gain and bandwidth enhancement of a microstrip antenna using partial substrate removal in multiple-layer dielectric substrate]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rao]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Kumar]]></surname>
<given-names><![CDATA[V.D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Progress electromagnetics research symposium proceedings]]></source>
<year>2011</year>
<page-range>1285-9</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="">
<article-title xml:lang=""><![CDATA[Dual band microstrip antenna for UMTS/WLAN/WIMAX applications]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Singh]]></surname>
<given-names><![CDATA[V.K.]]></given-names>
</name>
<name>
<surname><![CDATA[Ali]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
<name>
<surname><![CDATA[Singh]]></surname>
<given-names><![CDATA[A.K.]]></given-names>
</name>
<name>
<surname><![CDATA[Ayub]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[2013 international conference on communication systems and network technologies (CSNT). IEEE]]></source>
<year>2013</year>
<page-range>47-50</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[An integrated wideband multifunctional antenna using a micro strip patch with two U-slots]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vedaprabhu]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Vinoy]]></surname>
<given-names><![CDATA[K.J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Progress in Electromagnetics Research B]]></source>
<year>2010</year>
<volume>22</volume>
<page-range>221-35</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wong]]></surname>
<given-names><![CDATA[K.L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Compact and broadband microstrip antennas]]></source>
<year>2002</year>
<publisher-name><![CDATA[Wiley Publication]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
