Abstract
This paper proposes a radiating pattern reconfigurable antenna by employing RF Micro-electromechanical Systems (RF MEMS) switches. The antenna has a low profile and small size of 4 mm × 5 mm × 0.4 mm, and mainly consists of one main patch, two assistant patches, and two RF MEMS switches. By changing the RF MEMS switches operating modes, the proposed antenna can switch among three radiating patterns (with main lobe directions of approximately −17.0°, 0° and +17.0°) at 35 GHz. The far-field vector addition model is applied to analyse the pattern. Comparing the measured results with analytical and simulated results, good agreements are obtained.
Highlights
Radiating pattern reconfigurable antennas for the design of high-capacity systems have obtained increasing popularity, owing to their attractive advantages, such as compact structure and high efficiency
RF micro-electromechanical systems (RF MEMS) switches have been used broadly in reconfigurable antennas in recent years [4,5,6,7,8,9], but most of those antennas work in low frequencies and have no process consistence (i.e., RF MEMS switches were mounted in circuits after the antenna was manufactured)
ReIsnultthsisanpdapDeirs,ctuhsesipornoposed pattern reconfigurable antenna was simulated by HFSS software (oHf tFhSeI(oA(oSnHHffa1gtFnt3FithhlhS.Stee0eIeSSinn,sna1a1tAn3n3ntpP.ht.t0a0nNeaei,nsnopaAAAnnsrepaneoanrNa,ofoapas5tstsrhre,4oheoeroP4ffe,sts2twi,ht,htAphPtoPonseriwiw(tbot1itptnnunsp0srbbroioMiFunugnpsirrhHgeFoFggd,uisihzhggePr,uudpeA4PPrra3Ae7pAe,.t5.a7tU,7,etT.GU.UtSrTTehHnSSArhheAnAzee)rp.),.e)rp)p,(rae,crAroacoanooonpgnnpdpndidoofiolfetssistgthgneehehudeutddee,rrarSraraaaeeneanbnbsssnttlulteuueeteenalnlltntatnnsasCsnnaanaaltaaaerwtrwrerneweaananpp,ssanaprCrmsmeearwAssemeeeews,aaanneUsesstatnuaueeSssrsdtrdiAemeuesdidd.iirn)unm.ebbliFdFanyyuitiggebtltFhaudhuyietrergebetnundhy6e6erebtbteHbww..ny6FPPoeobShrhtHrSkw.kooFtPtasaoooSonhngrgfSaakortrlwlaatyysapopzoaznhgherefasertsrrwlaypazhreesr AgileAntgiPleNntAPNA54N425A442(1A0(M10HMzH–4z–34.53.G5 GHHz)z)(A(Aggilileenntt, SanttaaCCllaarraa,CCAA, U, USAS.A). )
Summary
Radiating pattern reconfigurable antennas for the design of high-capacity systems have obtained increasing popularity, owing to their attractive advantages, such as compact structure and high efficiency. Compared with lower frequency antennas (such as C-band or X-band antennas), Ka-band antennas have powerful data throughput capacity and the advantage of compact structure. Little work has been done on the principles of the proposed reconfigurable antenna and the design details of the proposed RF MEMS switch, such as the actuating voltage, pull in time, and fabrication process. The principles of the proposed reconfigurable antenna, the research of relationship between resonant frequency and RF MEMS switch structure configuration, the actuating voltage, the pull in time, and the fabrication process of the proposed RF MEMS switch are included.
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