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Chii chinonzi anRF sefa?

Radio frequency filter chikamu chakakosha chewaya isina waya tekinoroji. Inoshandiswa pamwe chete neredhiyo inogamuchira kusefa mamwe asina kufanira frequency mabhendi uye inongogamuchira iyo chaiyo frequency. Mafirita eRF akagadzirwa kuti ashande zviri nyore mu frequency renji kubva pakati pepakati kusvika kune yakakwira ma frequency (kureva megahertz uye gigahertz). Nekuda kwehunhu hwayo hwekushanda, inonyanya kushandiswa mumaredhiyo, kutaurirana newaya, terevhizheni nemimwe michina.

Kazhinji, mafirita mazhinji eRF anoumbwa neakabatanidzwa resonators, uye iwo emhando zvinhu anogona kuona iyo yekusefa muRF. Zvinoenderana nekushandiswa uye saizi yemidziyo isina waya, kune akawanda mafirita marudzi, anoti cavity filter, ndege sefa, electroacoustic sefa, dielectric sefa, coaxial sefa (yakasununguka coaxial tambo), nezvimwe.

Basic Types dzeRadio Frequency Sefa

Iyo RF sefa idunhu rakakosha rinobvumira masaini chaiwo kuti apfuure uku achibvisa masaini asingadiwe. Panyaya yefirita topology, kune mana ekutanga RF mafirita marudzi, anoti, high pass filter, low pass filter, band pass filter uye bhendi stop filter.

Low Pass Sefa:

Sezvinoreva zita, iyo yakaderera-pass sefa isefa inongobvumira yakaderera frequencies kuti ipfuure uye kudzoreredza mamwe masaini ma frequency panguva imwe chete. Kana chiratidzo chikapfuura nepakati bhendi, kuderedzwa kwayo frequency kunotemerwa nezvinhu zvakawanda, senge sefa topology, dhizaini uye chikamu chemhando. Uye zvakare, iyo sefa topology inotarisawo kukurumidza kwekuchinja kwesefa kubva papassband kuti iwane kudzvanywa kwayo kwekupedzisira.

Masefa epasi pasi anouya nenzira dzakasiyana siyana. Iko kushandiswa kukuru kwesefa ndeyekudzvinyirira iyo harmonic yeRF amplifier. Iyi ficha yakakosha nekuti inobatsira kudzivirira kukanganiswa kusiri madikanwa kubva kumabhendi ekutapurirana akasiyana. Kunyanya, yakaderera pass mafirita anoshandiswa kune odhiyo application uye kusefa kunze ruzha kubva kune chero ekunze redunhu. Mushure mokunge chiratidzo chepamusoro-chinosefa, iyo yakawanikwa yechiratidzo frequency ine hunhu hwakajeka.

High Pass Sefa:

Kusiyana neiyo yakaderera pass sefa, iyo yakakwira yekupfuura sefa inobvumira chete yakakwirira frequency masaini kuti apfuure. Muchokwadi, iyo yakakwirira pass sefa uye yakaderera pass sefa inopindirana, nekuti ese mafirita anogona kushandiswa pamwechete kugadzira bhendi-pass sefa. Dhizaini yeyakakwira pass sefa yakananga uye inoderedza frequency pazasi pechikumbaridzo.

Kazhinji, mafirita epamusoro anoshandiswa mumaodhiyo masisitimu, kuburikidza ayo ese akaderera ma frequency anosefa. Mukuwedzera, inoshandiswawo kubvisa vatauri vadiki uye mabhasi muzviitiko zvakawanda; Masefa aya akanyatso kuvakwa muvatauri. Nekudaro, kana chero DIY purojekiti ichibatanidzwa, iyo yakakwira pass sefa inogona kubatana nyore kune system.

Band Pass Filters:

Band-pass sefa idunhu rinobvumira masaini kubva kune maviri akasiyana frequencies kuti apfuure nekudzikisa masaini asiri mukati mayo anogamuchirwa. Mazhinji mabhendi-pass mafirita anovimba chero kunze kwesimba sosi uye anoshandisa anoshanda zvinoriumba, zvinoti zvakabatanidzwa maseketi uye transistors. Iyi sefa inonzi active band-pass sefa. Kune rimwe divi, mamwe mabhendi-pass mafirita haashandise ekunze magetsi uye anovimba zvakanyanya nezvinongoita zvinhu, zvinoti inductors uye capacitors. Masefa aya anonzi passive band-pass filters.

Bandpass mafirita anowanzo shandiswa mune isina waya inogashira uye transmitters. Basa rayo guru mudhipatimendi nderokudzikamisa bandwidth yechiratidzo chekubuda kusvika kune zvishoma, kuitira kuti data inodiwa inogona kuendeswa nekumhanya kunodiwa uye fomu. Kana iyo inogamuchira ichibatanidzwa, iyo bhendi-pass sefa inongobvumira decoding kana kunzwa iyo inodiwa nhamba yemafrequency, uku ichicheka mamwe masaini kubva paasingadiwe frequency.

Mune izwi, kana bhendi-pass sefa yakagadzirwa, inogona kukwidziridza mhando yechiratidzo uye kuderedza kukwikwidza kana kupindira pakati pezviratidzo.

Kuramba Band:

Dzimwe nguva inonzi band stop sefa, band stop sefa ifirita inobvumira ma frequency akawanda kupfuura pasina kuchinja. Nekudaro, inodzora mafrequency pazasi peiyo chaiyo siyana. Basa rayo rinopesana zvachose neiyo yebhandi-pass sefa. Chaizvoizvo, basa rayo ndere kupfuudza frequency kubva ku zero kusvika kune yekutanga kucheka-kubvisa poindi ye frequency. Pakati, inopfuura ese mafrequency pamusoro peyechipiri yekucheka-kubvisa poindi ye frequency. Nekudaro, inoramba kana kuvharira mamwe ese ma frequency pakati pemapoinzi maviri aya.

Mune izwi, sefa chinhu chinobvumira masaini kupfuura nerubatsiro rwepassband. Mune mamwe mazwi, kumira musefa ndiyo nzvimbo iyo mamwe ma frequency anorambwa nechero sefa. Kunyangwe iri high pass, yakaderera pass kana bhendi pass, iyo yakakodzera sefa sefa isina kurasikirwa mubhendi rekupfuura. Nekudaro, muchokwadi, hapana yakanakira sefa nekuti bandpass ichaona imwe frequency kurasikirwa uye hazvigoneke kuwana kusingaperi kudzvinyirira kana stopband yasvika.

Sei maRadio Frequency Filters akakosha zvakadaro?

RF mafirita anoshandiswa kurongedza masaini ma frequency, asi chii chinoita kuti ive yakakosha? Muchidimbu, mafirita eRF anogona kusefa ruzha rwunogona kukanganisa kunaka kana kuita kwechero nzira yekutaurirana kana kuderedza kukanganiswa kwemasaini ekunze. Kushaikwa kweRF sefa yakakodzera kunogona kukuvadza kutapurirana kwechiratidzo frequency, uye pakupedzisira kunogona kukuvadza maitiro ekutaurirana.

Naizvozvo, mafirita eRF anoita basa rakakosha mumasisitimu ekutaurirana asina waya (kureva setiraiti, radar, nharembozha isina waya masisitimu, nezvimwewo). Kana zvasvika pakushanda kwemotokari dzemuchadenga dzisina kurongwa (UAS), kukosha kweRF mafirita kuri pachena. Kushaikwa kweiyo filtration system ichakanganisa UAS munzira dzakawanda, senge:

Rudzi rwekutaurirana runogona kuderedzwa kusvika pakukanganisa kunokonzerwa nekunze kwemamiriro ekunze. Pamusoro pezvo, kuwanikwa kwenhamba huru yemasaini eRF mumhepo kunogona kukonzera kukuvadzwa kwakanyanya kuUAV yekutaurirana system. Zviratidzo zvakashata kubva kune mamwe mapuratifomu zvinosanganisira asi hazvigumiri ku:; Yakanyanya Wi-Fi chiratidzo chiitiko uye mamwe masisitimu ekutaurirana anoshanda mukati meUAS.

Kuvhiringwa kubva kune mamwe masisitimu ekutaurirana kunozokanganisa nzira yekutaurirana yeUAS, zvichidzikisa kana kudzikisira kutaurirana kwemaitiro akadaro.

Kupindira kuchakanganisawo kugamuchirwa kwechiratidzo cheGPS cheUAS; Izvi zvinowedzera mukana wekukanganisa mukutevera GPS. Mumamiriro ezvinhu akaipisisa, izvi zvinogona kukonzera kurasikirwa kwakakwana kwekugamuchira chiratidzo cheGPS.

Iine chaiyo RF sefa, kupindira kwekunze uye kukanganiswa kwechiratidzo kunogadzirwa nepedyo masisitimu ekutaurirana kunogona kubviswa nyore. Izvi zvinochengetedza mhando yeinodiwa masaini frequency uku uchisefa zviri nyore zvese zvisingadiwe masaini ma frequency.

Uye zvakare, RF mafirita zvakare anoita basa rakakosha munharaunda yenharembozha. Kana zvasvika kune nharembozha, dzinoda imwe nhamba yema frequency band kuti ishande nemazvo. Nekuda kwekushaikwa kwemafirita akakodzera eRF, mabhendi akasiyana-siyana haagari pamwe chete, izvo zvinoreva kuti mamwe mabhendi efrequency acharambwa, anoti, Global Navigation Satellite System (GNSS), kuchengetedzwa kwevanhu, Wi Fi, etc. Pano, mafirita eRF anoita basa rinokosha nekubvumira mabhendi ose kuti agare pamwe chete panguva imwe chete.

Kazhinji, mafirita ane huremu huremu uye anobatsira kuvandudza mashandiro eiyo frequency yechiratidzo. Kana iyo RF sefa isingape kuita kwaunoda, saka unogona kuongorora dzakasiyana siyana dzimwe sarudzo, imwe yacho ndeyekuwedzera amplifiers kudhizaini yako. Kubva pane grid amplifier kune chero imwe RF simba amplifier, unogona kushandura yakaderera siginecha frequency kune yakakwirira chiratidzo frequency; Kuti uvandudze kuita kwese kweRF dhizaini.

Si Chuan Keenlion Microwave sarudzo yakakura mune narrowband uye Broadband masisitimu, inovhara ma frequency kubva 0.5 kusvika 50 GHz. Iwo akagadzirirwa kubata kubva pagumi kusvika pamakumi matatu ekuisa simba mu50-ohm transmission system. Microstrip kana stripline madhizaini anoshandiswa, uye akakwenenzverwa kuita zvakanaka.

Isu tinogona zvakare kugadzirisa iyo RF Sefa zvinoenderana nezvaunoda. Iwe unogona kupinda peji rekugadzirisa kuti upe zvakatemwa zvaunoda.

https://www.keenlion.com/customization/

Sichuan Keenlion Microwave Technology Co., Ltd.

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tom@keenlion.com