ĐỀ TÀI THIẾT KẾ BỘ LỌC FIR THÔNG CAO BẰNG PHƯƠNG PHÁP LẤY MẪU TẦN SỐ
Thiết kế angten bằng phương pháp số
Transcript of Thiết kế angten bằng phương pháp số
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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: