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I. GII THIU n mn gii thiu cch to ra, m phng v phn tch 1 angten microstrip patch
antenna cng hng ti tn s7.5 Ghz. Hnh dng anten nh sau:
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II. To angten1. Substrate
to substrate, chn trn toolbar. Chn thng s nh sau:
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2. Feed LineChn trn toolbar, chn thng s Feed line nh sau:
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3. PatchChn trn toolbar, chn thng s Patch nh sau:
Ni Patch v Feeder vi nhau. Chut phi 2 object chn Edit > Boolean > Unite.
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4. Ground PlaneChn trn toolbar, chn thng s nh sau:
5. Assign ExcitationExcitation l 1 port dn sng khi bt u ng microtrip. v port, chn Chn
object port, t history tree, chut phi v assignexcitation. Trong trng hp ny, l
waveport. Chn waveport > Name > Next, sao nh ngha intergration line. Thng
thng, intergration line c nh ngha t im gia bn di n im gia bn
trn. Chn gi tr default > Finish
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Sau khi m ra ca s mi:
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Click suivant;
V lump port:
6. Assign BoundarySau khi model c to ra, tip theo chng tao phi ch ra iu kin bin (AssignBoundary). Trong HFSS, ranh giibc xc s dng m phng cc vnmcho cc sngbc xi xa v cng xa vo khng gian. HFSS hpth sng ti ranh gii
bcx, v c bnphnh ranh gii xa v cng. Trong trng hp ny ABC (AbsorbingBoundary condition) l 1 Box Air
v cc Box Air, nhp chut vo trn thanh cng c. Sau v mt hpbng
cch incc d liu sau ynh hnh di y.
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Tip theo chnboundary, chut phi > Assign Boundary > radiation
7. Thit lp phn tchBy gi ta c 1 model c th chy. Vic tip theo l thit lp phn tch
To 1 Analysis set up: HFSS > Analysis Setup > Add Solution Setup. Ti ca sSolution setup, chn general tab, Solution Tn s 7.5 GHz, Maximum Number ofPasses 20, Maximum Delta S per Pass 0.02.
8. Gn tn s qut Frequency SweepTo tn s qut : HFSS > Analysis Setup > Add Sweep. Chn Solution Setup:
Setup1>OK. Chn thng s qut:
Sweep Type: Fast
Frequency Setup Type: Linear Count
Start: 5 GHz
Stop: 10 GHz
Count: 500
9. To hiu lc cho m hnh:Chn menu HFSS > Validation Check>Close. Kim tra errors v warnings trong
Message Manager.
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10.Phn tch:Chn HFSS > Analyze> click
11.Solution data
12. To reportChn Results > Create Report
Report Type: Modal S Parameters
Display Type: Rectangular
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Ti ca s Trace, chn Solutoin Setup1 : Adaptive1. Tap Y, chn Category S
Parameter, Quantity to S (Waveport, waveport), Function dB. Click Add Trace> Done.
Angten cng hng tn s khong 7.5 GHz
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13. th pht sng:To hnh cu v hn. Chn Results< Create Report. Sau khi ca s mi c to
nn, chn:
Report Type: Far Field
Display type: 3D Polar Plot.
Ta c kt qu sau:
