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At the same time , the space for those antennas is decreasingcreatingproblems for antenna efficiency and bandwidth
The needto designan antenna with greater efficiency and wider bandwidth
The versatility and flexibility in structure offered by micro strip antennahas resultedin improve antenna performance ( i.e. , bandwidth , gain , efficiency
With the introduction of the loaded patches , multiple resonant frequencies emergedresultsin wide bandwidth and enhanced antenna gain
both negative permittivity and permeabilityresultsin antenna size miniaturization , efficiency , and gain enhancement
A non - resonating ground planecausessignificant reduction in the impedance bandwidth and in the efficiency of the antenna
An important reduction of the surface waves in the PBG antenna ... the simulationsleadsto an improvement of the antenna efficiency and bandwidth
the miniaturization of the antenna foot prints ... in turnleadsto lower efficiency and bandwidth for the antenna
This type of applicationwill resultin a drop in antenna gain and bandwidth
each key controllersinfluencethe antenna in terms of bandwidth , directivity , gain and efficiency produced
Such antennas(passive) are designedSuch antennas
a large impact on the development of wireless devicescausea large impact on the development of wireless devices
in poor radiation efficiencyresultingin poor radiation efficiency
on a dielectric substrate with metal strip gratingsmay be designedon a dielectric substrate with metal strip gratings
in a significantly improved axial ratio bandwidthresultingin a significantly improved axial ratio bandwidth
The microstrip patch antenna array(passive) was designedThe microstrip patch antenna array
Several other parameters such as the longitudinal correlation function(passive) may ... be influencedSeveral other parameters such as the longitudinal correlation function
of U - shaped dielectric slit and spiral conductor that is grounded using via - holesare composedof U - shaped dielectric slit and spiral conductor that is grounded using via - holes
New ideas(passive) are still being discoveredNew ideas
The Rogers substrate thickness(passive) has been designedThe Rogers substrate thickness