Cov Txheej Txheem Pub Noj Microstrip Antenna: Hom thiab Kev Xaiv

Microstrip Antenna Feed yog dab tsi?

Ib qho khoom noj txuas lub RF qhov chaw lossis tus txais rau lub thaj hluav taws xob thaum hloov pauv lub cev impedance mus rau lub antenna input impedance. Hauv kev tsim qauv siv tau, qhov khoom noj yog ib feem ntawm lub antenna es tsis yog ib qho kev qhia sib cais. Nws cov geometry hloov pauv qhov kev faib tawm tam sim no, zaus resonant, rov qab poob, bandwidth siv tau thiab kev tawg tsis xav tau.

Cov khoom siv microstrip antenna feem ntau muab faib ua cov txheej txheem sib cuag ncaj qha thiab cov txheej txheem sib txuas hluav taws xob. Cov kab Microstrip thiab coaxial probe pub rau kev sib cuag hluav taws xob ncaj qha nrog daim ntawv nplaum. Cov khoom siv Aperture-coupled thiab proximity-coupled hloov lub zog los ntawm kev sib txuas hluav taws xob thiab feem ntau siv ntau dua ib txheej substrate.

Plaub Txoj Kev Pub Noj Antenna Microstrip Tseem Ceeb

1. Microstrip Line Feed

Hauv ib txoj kab microstrip pub, ib txoj kab xa ntawv luam tawm txuas ncaj qha rau daim ntawv nplaum. Cov kab thiab daim ntawv nplaum tuaj yeem tsim rau ntawm tib lub substrate hauv ib qho txheej txheem PCB, ua rau txoj kev no yooj yim, qis profile thiab tsim nyog rau kev tsim khoom pheej yig thiab ntau daim ntawv luam tawm.

Kev sib phim impedance tuaj yeem hloov kho tau los ntawm kev hloov qhov dav ntawm kab pub, siv ib qho inset, ntxiv lub transformer quarter-wave lossis kho qhov sib tshuam ntawm kab thiab thaj. Qhov kev txwv tseem ceeb yog tias kab pub kuj tawm mus. Qhov kev tawm tsam cuav no tuaj yeem cuam tshuam rau kev hla-polarization thiab tus qauv kev tawm tsam, tshwj xeeb tshaj yog thaum lub substrate tuab lossis lub network pub ntev.

2. Coaxial Probe Feed

Ib qho coaxial probe feed hla lub dav hlau hauv av thiab substrate. Tus coaxial sab nraud conductor txuas nrog lub dav hlau hauv av, thaum tus conductor sab hauv txuas nrog lub patch. Kev txav mus rau qhov chaw probe muab ib txoj hauv kev yooj yim los xaiv qhov input resistance xav tau yam tsis tas yuav luam tawm ib txoj kab pub rau ntawm qhov chaw radiating.

Txoj kev no muab kev tso chaw pub mov yooj yim thiab feem ntau yog cov kab hluav taws xob pub tsawg, tab sis nws yuav tsum tau khawb thiab kev sib txuas hluav taws xob txhim khu kev qha. Lub probe ntev ua rau muaj inductance, yog li kev ua haujlwm tuaj yeem poob qis nrog cov khoom siv hluav taws xob tuab lossis ntawm cov zaus siab dua. Yog li ntawd, qhov geometry ntawm lub connector, qhov ntim ntawm solder thiab kev kam rau ua yuav tsum suav nrog hauv tus qauv kawg.

3. Aperture-Coupled Feed

Ib qho kev pub hluav taws xob uas txuas nrog qhov aperture tso cov kab xa hluav taws xob hauv qab lub dav hlau hauv av thiab thaj chaw saum toj ntawm nws. Lub zog hla dhau ib qho qhov hauv lub dav hlau hauv av. Vim tias lub dav hlau hauv av cais lub network pub hluav taws xob ntawm thaj chaw tawm hluav taws xob, qhov kev npaj no muab kev sib cais zoo ntawm kev pub hluav taws xob mus rau lub tshuab cua sov thiab tuaj yeem txo cov hluav taws xob pub hluav taws xob tsis xav tau.

Qhov loj ntawm qhov, qhov chaw ntawm qhov, qhov pub-kab stub, substrate thickness thiab dielectric constants txhua yam cuam tshuam rau kev sib txuas thiab kev sib phim. Aperture coupling tuaj yeem txhawb nqa bandwidth dav dua li ntau qhov pub ncaj qha, tab sis nws xav tau cov qauv ntau txheej thiab kev sib phim raug ntawm kab, qhov thiab thaj.

4. Kev Pub Noj Sib Txuas

Hauv qhov proximity-coupled feed, tseem hu ua electromagnetically coupled feed, kab microstrip raug muab tso rau hauv qab daim patch thiab cais los ntawm nws los ntawm ib txheej dielectric. Kab overlaps ib feem ntawm daim patch, thiab lub zog raug xa mus rau hauv lub electromagnetic field. Tsis muaj kev sib txuas hluav taws xob ncaj qha thiab tsis muaj qhov hauv av.

Qhov ntev ntawm qhov sib tshooj, qhov chaw ntawm kab, cov khoom ntawm cov substrate thiab cov tuab ntawm cov txheej tswj qhov kev sib txuas. Txoj kev no tuaj yeem muab cov bandwidth impedance dav thiab cov hluav taws xob tsis zoo, tab sis cov qauv ob txheej yog tuab dua thiab rhiab heev rau kev sib phim thiab kev sib txuas ua ke.

Kev Sib Piv ntawm Microstrip Antenna Feeding Methods

Txoj kev pub mis	Lub peev xwm bandwidth ib txwm muaj	Kev Tsim Khoom	Kev siv hluav taws xob pub / kev rho tawm	Zoo tshaj plaws rau
Txoj kab microstrip	Nqaim mus rau nruab nrab	PCB yooj yim, ib txheej xwb	Kev siv hluav taws xob ntau ntxiv rau kab noj mov	Cov qauv luam tawm thiab cov arrays uas tsis kim heev, pheej yig
Coaxial soj ntsuam	Nqaim mus rau nruab nrab	Kev sib txuas ntawm qhov drilling thiab ntsug	Kev tawg hluav taws xob tsawg	Kev hloov kho qhov chaw pub mis ib leeg yooj yim
Aperture-coupled	Nruab nrab mus rau dav	Multilayer nrog qhov sib dhos	Kev cais tawm pub zoo	Cov qauv tsim uas xav tau kev cais tawm thiab bandwidth dav dua
Kev sib ze ua ke	Dav dav	Multilayer nrog kev sib tshooj sib dhos	Kev tawg tsis tseeb tsawg	Cov qauv tsim broadband qhov twg ntxiv tuab yog qhov siv tau

Cov no yog cov qauv tsim qauv sib piv, tsis yog kev lav phib xaub rau kev ua haujlwm ruaj khov. Cov duab ntawm daim thaj, kev poob ntawm cov khoom siv, qhov tsis hloov pauv ntawm dielectric, qhov tuab, zaus, qhov ntev ntawm cov khoom siv pub thiab kev kam rau ua haujlwm tuaj yeem hloov pauv qhov tshwm sim.

Yuav Xaiv Txoj Kev Pub Noj Kom Yog Li Cas

• Qhov bandwidth xav tau:Feem ntau cov khoom noj ncaj qha txaus rau cov kab ke narrowband. Kev sib txuas ntawm qhov aperture lossis qhov sib thooj yuav raug nyiam dua thaum qhov bandwidth impedance dav dua yog qhov yuav tsum tau ua tseem ceeb.
• Tus lej ntawm cov ntaub ntawv thiab cov txheej:Ib txoj kab microstrip pub rau cov qauv ua rau cov qauv nyias thiab yooj yim rau kev tsim khoom. Cov khoom noj sib txuas xav tau cov khaubncaws sab nraud povtseg ntxiv thiab kev sib dhos.
• Kev ntshiab ntawm hluav taws xob:Yog tias qhov hluav taws xob pub-network lossis kev cais tawm ntawm pem hauv ntej mus rau tom qab yog qhov tseem ceeb, cov qauv aperture-coupled tuaj yeem cais cov khoom noj ntawm daim ntawv.
• Kev sib koom ua ke ntawm cov array:Cov tes hauj lwm microstrip luam tawm yooj yim rau cov arrays, tab sis kev poob kab thiab kev tawg ntawm cov kab mob nce ntxiv thaum lub network ntev dua. Kev teeb tsa ntawm cov tuam txhab thiab kev kam rau siab ntawm qhov loj me / theem yuav tsum tau soj ntsuam ua ke.
• Zaus thiab kev kam rau siab:Ntawm cov zaus millimeter-wave, kev hloov pauv ntawm cov connector, kev kam rau etching, qhov tuab ntawm substrate thiab qhov yuam kev sau npe dhau los ua qhov tseem ceeb hauv hluav taws xob.
• Kev txwv ntawm lub zog thiab thermal:Yuav tsum tau kuaj xyuas qhov poob ntawm tus neeg txuas hluav taws xob, qhov cua sov dielectric, qhov ceev ntawm cov khoom siv hluav taws xob thiab qhov concentration ntawm thaj chaw hauv zos rau qib fais fab uas xav tau.
• Tus nqi thiab rov ua dua:Tus qauv tsim nrog qhov bandwidth zoo tshaj plaws yuav tsis yog qhov kev xaiv zoo tshaj plaws yog tias nws xav tau kev sib txuas nyuaj lossis kev sib dhos ntau txheej nruj.

Yuav Xaiv Qhov Chaw Pub Coaxial Probe Li Cas

Qhov chaw probe kom raug yog qhov chaw uas qhia txog lub hom phiaj input impedance thaum ua kom lub hom phiaj zoo siab nrog kev sib tshuam cross-polarization. Nws yuav tsum tsis txhob raug xaiv cia li ntawm qhov chaw nruab nrab, qhov chaw siab tshaj plaws ntawm lub zog hluav taws xob lossis qhov chaw siab tshaj plaws tam sim no.

Rau ib daim duab plaub fab ib txwm ua haujlwm hauv nws hom yooj yim, qhov tsis kam ntawm cov tswv yim feem ntau siab nyob ze ntawm ntug radiating thiab txo qis thaum cov khoom noj txav mus rau hauv nruab nrab raws li qhov ntev resonant. Ib qho 50-ohm feem ntau pom ntawm ntug thiab nruab nrab. Qhov chaw tseeb nyob ntawm qhov ntev ntawm daim ntawv, cov khoom substrate, txoj kab uas hla probe, lub dav hlau hauv av, qhov txuas thiab cov qauv nyob ze.

1. Pib nrog qhov ntev ntawm thaj rau qhov xav tau resonant zaus thiab polarization.
2. Muab lub probe tso rau ntawm kab symmetry kom haum los pab txhawb hom kev xav tau thiab txwv cov teb hla polarized.
3. Cheb qhov offset ntawm ntug radiating hauv tus qauv electromagnetic puv nthwv dej kom txog thaum lub hom phiaj impedance thiab rov qab poob tau mus txog.
4. Suav nrog rau qhov kev hloov pauv coaxial, probe inductance, solder pad, finite ground plane, enclosure thiab radome thaum lawv yog ib feem ntawm qhov kev sib dhos kawg.
5. Tsim ib qho qauv kam rau siab rau qhov tuab ntawm cov substrate, dielectric constant, etching thiab feed-position error.
6. Siv lub calibrated vector network analyzer los xyuas kom meej tias lub antenna uas tsim tawm los muaj tseeb thiab kho tsuas yog tom qab piv cov kev ntsuas thiab cov qauv siv simulation.

Kev Tshawb Xyuas Tsim thiab Kev Ntsuas

Yuav tsum tau txheeb xyuas qhov kev ua kom zoo dua ntawm cov khoom noj khoom haus nrog ntau dua ib qho nqi S-parameter. Kev tshuaj xyuas tiav feem ntau suav nrog:

• Resonant zaus, S11, rov qab poob, VSWR thiab impedance bandwidth.
• Cov tswv yim impedance tiag tiag thiab xav txog thoob plaws hauv qhov kev ua haujlwm.
• Tag nrho cov kev ua haujlwm zoo, qhov nce thiab tus neeg coj / dielectric poob.
• Cov qauv hluav taws xob co-polarized thiab cross-polarized hauv cov dav hlau tseem ceeb.
• Qhov piv ntawm pem hauv ntej mus rau nram qab, cov sidelobes thiab cov qauv distortion los ntawm lub pub lossis lub connector.
• Kev faib tawm tam sim no thiab pov thawj ntawm cov nthwv dej saum npoo av uas tsis xav tau lossis cov qauv siab dua.
• Kev ua tau zoo raws li qhov kub thiab txias, radome, tsev, cable-routing thiab installation tej yam kev mob.

Cov ntawv thov

Cov kav hlau txais xov tooj cua thiab cov arrays me me siv rau hauv cov chaw sib txuas lus wireless, cov khoom siv satellite thiab navigation, radar sensors, telemetry, aerospace platforms, test systems thiab compact embedded RF products. Yuav tsum xaiv cov qauv pub rau qhov xav tau tiag tiag: ib qho pub luam tawm yooj yim yuav zoo tagnrho rau ib chav me me narrowband, thaum ib qho pub txuas nrog yuav raug tsim nyog rau bandwidth dav dua lossis kev sib cais muaj zog dua.

Cov Lus Nug Feem Ntau

Txoj kev pub microstrip antenna twg yooj yim tshaj plaws?

Feem ntau, cov kab microstrip pub yog qhov yooj yim tshaj plaws vim tias cov kab thiab daim ntawv nplaum tuaj yeem luam tawm rau ntawm tib lub substrate. Nws yooj yim rau kev sib xyaw nrog lub network pub planar, txawm hais tias cov kab hluav taws xob pub yuav tsum tau tswj.

Txoj kev pub mis twg muab qhov bandwidth dav tshaj plaws?

Feem ntau, cov khoom noj uas sib txuas nrog thiab cov khoom noj uas sib txuas nrog qhov aperture muaj peev xwm ntau dua li cov khoom noj ncaj qha. Cov bandwidth tiag tiag tseem nyob ntawm qhov geometry ntawm lub antenna thiab cov substrate stack.

Cov khoom noj twg muab kev cais tawm zoo tshaj plaws ntawm thaj chaw uas tawm hluav taws xob?

Qhov kev sib txuas ntawm qhov qhib thiab kaw ua rau muaj kev sib cais zoo vim tias lub dav hlau hauv av cais cov kab pub mov ntawm thaj chaw. Kev xau ntawm qhov thiab kev tawg rov qab tseem yuav tsum tau soj ntsuam.

Qhov chaw pub mov puas hloov qhov zaus resonant?

Nws lub hom phiaj tseem ceeb yog kev sib phim impedance, tab sis lub probe lossis kab kuj cuam tshuam cov teb electromagnetic. Cov probes loj, cov probes ntev, kev sib txuas muaj zog lossis kev pub ze rau thaj chaw teb rhiab heev tuaj yeem hloov pauv qhov resonance nrog rau qhov input impedance.

Qhov txawv ntawm kev pub mis thiab kev sib phim impedance yog dab tsi?

Kev pub noj piav qhia txog yuav ua li cas lub zog RF raug xa mus rau thaj. Kev sib phim impedance yog cov txheej txheem ntawm kev ua kom lub antenna input sib xws nrog txoj kab xa xov, feem ntau yog 50 ohms. Qhov chaw pub noj thiab geometry yog cov hloov pauv tseem ceeb, tab sis cov transformers ntxiv, insets, stubs lossis cov tes hauj lwm sib phim kuj tseem siv tau.

Xaus lus

Kev xaiv lub microstrip antenna feed yog qhov kev txiav txim siab ntawm lub system. Microstrip line thiab coaxial probe feeds nyiam qhov yooj yim thiab kev kho ncaj qha, thaum lub aperture thiab proximity coupling muab kev sib cais zoo dua lossis bandwidth dav dua ntawm tus nqi ntawm cov txheej ntxiv thiab kev tswj hwm kev tsim khoom nruj dua. Kev ua tau zoo kawg yuav tsum tau lees paub nrog kev simulation puv nthwv dej, kev tshuaj xyuas kev kam rau siab thiab kev ntsuas calibrated.

Cov Lus Qhia Txog Khoom Siv Microstrip Antenna

Tshawb nrhiav RF MISOcov khoom siv microstrip antennahauv qab no, los yogtiv tauj peb pab neeg ua haujlwm engineeringlos tham txog qhov ntau zaus, qhov nce, polarization, interface thiab kev koom ua ke.