Abstract
This article investigates the design, modeling, and fabrication of small-size (150 × 90 × 1.6 mm) broadband printed biconical antenna. The proposed antenna is intended for use a reference antenna for electromagnetic interference measurement inside the EMC chamber. The reflection coefficient (S11-parameter) is verified by modeling the equivalent circuit of the structure in terms of lumped elements. This structure offers a −10 dB impedance bandwidth (from 0.65 GHz to 2.3 GHz) with the tapered balun feeding method. Therefore, it has a high probability of estimating the electromagnetic waves emitted from several applications such as GSM, LTE, UMTS, 3G, Wi-fi, Bluetooth, ZigBee and more. The simulated standard antenna parameters are compatible with the measured parameters results. Furthermore, azimuth omnidirectional radiation pattern and well-realized gain (3.8 dBi) are achieved, reflecting good values of antenna factor compared to the commercial design.
Highlights
Electronic devices have become more popular and are becoming smaller in size
Three mandatory aspects should exist to generate electromagnetic interference (EMI) phenomena, the source of the electromagnetic waves, the victim affected by the source, and the path between the source and the victim
Two methods were proposed for EMI measurement based on radiated element regions and the power of the interference source
Summary
Electronic devices have become more popular and are becoming smaller in size. Two methods were proposed for EMI measurement based on radiated element regions and the power of the interference source. The antennas used for the EMC test should have specific characteristics such as wide bandwidth, high gain, omnidirectional radiation pattern, and good antenna factor. These designed antennas are intended to work in the very high frequency (VHF) and ultra-high frequency (UHF) bands (30–1000 MHz and 1000–3000 MHz, respectively) [8], to detect the interference emitted from the most critical applications in these bands such as GSM (850–900 MHz), LTE (1800 MHz), UMTS or 3G (2100 MHz), Wi-fi, Bluetooth, Zigbee and more (2400 MHz) [9,10]. DeTshigenchPoroicceedouf arebsiconical antenna has a significant advantage related to the shape of the raTdhieatcihonoipceatotefran.bTicoonbiecaml oarnetesnpnecaifhica,sthaesirgandiifiactiaonnt eamdvisasniotangferormelattheed dtoevtihcee suhnadpeer othfethteestra(dDiaUtTio)nhpasattaenrnu.npToredbeictmedorfeorsmpecainfidc, ttehnedsratdoiabtieonomemniidsisrieocntiofrnoaml rtahtheedretvhiacne upnredseerntthdeitreesctti(vDeUrTa)dhiaatsioann. uTnhperreedfoicrtee,dufsoinrmg aanddirteecntdivsetoanbteeonmnanimdiaryeclteioandatloraathmeristshianng pErMesIecnatlcduilraetciotinveduraedtioattihoenf.aTcthtehraetfothree,duisreincgtivaedriardeicattiivoenapnattetnenrna cmananyoltecaodvteor athme wisshionlge EraMdiIactaiolcnuelamtiiottneddufreotmo tDhUe Tfa,cit.et.h, aotmthneiddiirreeccttiiovnearlaadnitaetnionnaspsauttcehrnascabnicnoonticcoavl aenr ttehnenwashoarlee rpardefiaetriroendeimn itthteedsefraopmplDicUatTio, in.es.,roatmhenridtihreacntidoniraelcatinotneanlnaanstseuncnhasassbuicchonaiscahloarnnteannntaesnnaraes p[2r5e]f.erred in these applications rather than directional antennas such as horn antennas [25]
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