<?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>2007-0705</journal-id>
<journal-title><![CDATA[Nova scientia]]></journal-title>
<abbrev-journal-title><![CDATA[Nova scientia]]></abbrev-journal-title>
<issn>2007-0705</issn>
<publisher>
<publisher-name><![CDATA[Universidad de La Salle Bajío A. C., Coordinación de Investigación]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-07052016000100001</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Structures defects of two shapes on rectangular and circular ground planes]]></article-title>
<article-title xml:lang="es"><![CDATA[Dos geometrías aplicadas a estructuras de defectos sobre planos de tierra rectangulares y circulares]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tecpoyotl-Torres]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vera-Dimas]]></surname>
<given-names><![CDATA[J. G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-González]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas-Bernal]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma del Estado de Morelos Centro de Investigación en Ingeniería y Ciencias Aplicadas ]]></institution>
<addr-line><![CDATA[Cuernavaca ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma del Estado de Morelos Facultad de Ciencias Químicas e Ingeniería ]]></institution>
<addr-line><![CDATA[Cuernavaca ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Tecnológico Superior de Irapuato Departamento de Electrónica ]]></institution>
<addr-line><![CDATA[Irapuato ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2016</year>
</pub-date>
<volume>8</volume>
<numero>16</numero>
<fpage>1</fpage>
<lpage>16</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-07052016000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-07052016000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-07052016000100001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In this work the performance of a rectangular patch antenna with a rectangular ground plane is compared to the case where a circular one is used. For circular case, bigger gain and smaller bandwidth are observed. The comparison was also realized when defects were implemented on the ground planes. As a result, changes on gains, S11 parameter, and bandwidths were observed. For rectangular antenna on rectangular substrate with Defect Ground Structure (DGS), the main improvement is on S11 parameter. For the case of circular ground plane (or substrate) the Bandwidth shows an increment of 113.59% compare to the case without defects. All antennas were simulated using FEKO software.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este trabajo se compara el rendimiento de una antena de parche rectangular realizada sobre planos de tierra rectangular y circular, respectivamente. Se observa una mayor ganancia para el caso circular pero un menor ancho de banda. La comparación se llevó a cabo también cuando a los planos de tierra se agregaron defectos. Como resultado, se observaron cambios en las ganancias, el parámetro S11 y los anchos de banda. Para la antena rectangular sobre substrato rectangular con Defectos en el Substrato (DGS, por sus siglas en inglés) la principal mejora observada fue sobre el parámetro S11. Para el caso del plano de tierra (o substrato) circular, el ancho de banda muestra un incremento de 113.59% comparado con el caso sin defectos. Las antenas fueron simuladas utilizando el software FEKO.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Ganancia]]></kwd>
<kwd lng="es"><![CDATA[Microtiras]]></kwd>
<kwd lng="es"><![CDATA[Parámetro S11]]></kwd>
<kwd lng="es"><![CDATA[FR-4]]></kwd>
<kwd lng="en"><![CDATA[Gain]]></kwd>
<kwd lng="en"><![CDATA[Microstrip]]></kwd>
<kwd lng="en"><![CDATA[S11 parameter]]></kwd>
<kwd lng="en"><![CDATA[FR-4]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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