{"id":31582,"date":"2019-10-31T21:41:58","date_gmt":"2019-10-31T18:41:58","guid":{"rendered":"https:\/\/prohoster.info\/blog\/na-kakoj-diapazon-eta-antenna-izmeryaem-harakteristiki-antenn\/"},"modified":"2019-10-31T21:41:58","modified_gmt":"2019-10-31T18:41:58","slug":"na-kakoj-diapazon-eta-antenna-izmeryaem-harakteristiki-antenn","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/na-kakoj-diapazon-eta-antenna-izmeryaem-harakteristiki-antenn","title":{"rendered":"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/382292eed2e7f08be017343c01eb5c2f.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>\u2014 Milline sagedusala on selle antenni jaoks?<br \/>\n\u2014 Ei tea, kontrolli.<br \/>\n\u2014 KAAAK?!?!<br \/>\n<\/b><br \/>\nKuidas m\u00e4\u00e4rata, mis antenn sul k\u00e4es on, kui sellel puudub m\u00e4rgistus? Kuidas aru saada, milline antenn on parem v\u00f5i halvem? See probleem on mind kaua vaevanud.<br \/>\nArtiklis on lihtsate s\u00f5nadega kirjeldatud antennide omaduste m\u00f5\u00f5tmise metoodikat ning kuidas m\u00e4\u00e4rata antenni sagedusala.<\/p>\n<p>Kogenud raadioinseneridele v\u00f5ib see teave tunduda banaalne, ja m\u00f5\u00f5tmise metoodika ebapiisavalt t\u00e4pne. Artikkel on suunatud neile, kes ei m\u00f5ista raadioside tehnoloogiat, nagu mina. <\/p>\n<p><b>TL;DR<\/b> M\u00f5\u00f5dame antennide SWR erinevatel sagedustel OSA 103 Mini seadme ja suunatud jaguri abil, joonistades graafiku SWR s\u00f5ltuvusest sagedusest. <br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<h2>Teooria<\/h2>\n<p>\nKui saatja saadab signaali antenni, siis osa energiast kiirgub \u00f5hku, osa reflekteeritakse ja naaseb tagasi. Suhe kiirgatud ja peegeldunud energia vahel iseloomustab seisva laine koefitsienti (SWR v\u00f5i K\u0421\u0412). Mida v\u00e4iksem on SWR, seda suurem osa saatja energiast kiirgub raadiolainetena. SWR = 1 t\u00e4hendab, et peegeldusi pole (kogu energia kiirgub). Reaalse antenni SWR on alati suurem kui 1.<\/p>\n<p>Kui antennile saata erineva sagedusega signaali ja m\u00f5\u00f5ta samal ajal VSWR-i, saab leida, millisel sagedusel on peegeldus minimaalne. See on antenni t\u00f6\u00f6vahemik. Samuti saab v\u00f5rrelda erinevaid antenne sama vahemiku jaoks ja leida, milline neist on parem.<\/p>\n<p><img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/570bcfba65af1250c8245446ee38d846.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nOsa saatja signaalist peegeldundub antennilt.<\/p>\n<p>Teatud sagedusele kavandatud antenn peaks teoorias omama k\u00f5ige madalamat VSWR-i oma t\u00f6\u00f6frequentidel. See t\u00e4hendab, et piisab, kui kiirgada antennile erinevaid sagedusi ja leida, millisel sagedusel on peegeldus k\u00f5ige madalam, st maksimaalne energia lahkub raadiosignaalidena.<\/p>\n<p>Oma v\u00f5imege genereerida signaali erinevatel sagedustel ja m\u00f5\u00f5ta peegeldust, suudame koostada graafiku, mille X-teljel on sagedus ja Y-teljel signaali peegeldumise koefitsient. Tulemuseks on, et seal, kus graafikus on langus (st minimaalne signaali peegeldus), on antenni t\u00f6\u00f6vahemik. <\/p>\n<p><img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/6b76c3667d764ffa98ee25463cba8878.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nKujuteldav graafik, mis n\u00e4itab peegeldumise s\u00f5ltuvust sagedusest. Kogu vahemikus on peegeldus 100%, v\u00e4lja arvatud antenni t\u00f6\u00f6\u9891\u7387.<\/p>\n<p><\/p>\n<h3>Seade Osa103 Mini<\/h3>\n<p>\nM\u00f5\u00f5tmiste jaoks kasutame <noindex><a rel=\"nofollow\" href=\"http:\/\/www.osa103.ru\/\">OSA103 Mini<\/a><\/noindex>. See on universaalne m\u00f5\u00f5teseade, mis \u00fchendab osillograafi, signaaligeneraatori, spektri anal\u00fcsaatori, ACH\/FCH m\u00f5\u00f5tja, vektori antenni anal\u00fcsaatori, LC m\u00f5\u00f5tja ja isegi SDR-transiivri. OSA103 Mini t\u00f6\u00f6vahemik on piiratud 100 MHz, OSA-6G moodul laiendab sagedusvahemikku IA\u0427\u0425 re\u017eiimis kuni 6 GHz. Algne programm koos k\u00f5igi funktsioonidega kaalub 3 MB, t\u00f6\u00f6tab Windowsis ja Linuxis wine'i kaudu.<\/p>\n<p><img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/2a959223b0f99593a8ba609429019cad.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n Osa103 Mini \u2014 universaalne m\u00f5\u00f5teseade raadiohuvilistele ja inseneridele<\/p>\n<h3>Suunatud vastuv\u00f5tja<\/h3>\n<p><img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/7ddcda098311bb0944b957204e09e91f.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Suunatud vastuv\u00f5tja (directional coupler) \u2014 seade, mis suunab v\u00e4ikese osa RF-signaalist, mis liigub kindlas suunas. Meie puhul peab see suunama osa peegelduvast signaalist (tuleb antennilt tagasi generaatorisse), et seda m\u00f5\u00f5ta. <br \/>\nVisuaalne selgitus suunatud vastuv\u00f5tja t\u00f6\u00f6st: <noindex><a rel=\"nofollow\" href=\"https:\/\/www.youtube.com\/watch?v=iBK9ZIx9YaY\">youtube.com\/watch?v=iBK9ZIx9YaY<\/a><\/noindex><\/p>\n<p>Suunatud vastuv\u00f5tja peamised omadused:<\/p>\n<ul>\n<li><b>T\u00f6\u00f6 sagedused<\/b> \u2014 sageduste vahemik, mille jooksul peamised n\u00e4itajad ei \u00fcleta normi piire. Minu vastuv\u00f5tja on m\u00f5eldud sagedustele vahemikus 1 kuni 1000 MHz <\/li>\n<li><b>K\u00e4itamine (Coupling)<\/b> \u2014 kui palju signaali (detsibelides) suunatakse, kui lainetus liigub IN-ist OUT-i<\/li>\n<li><b>Suunatavus (Directivity)<\/b> \u2014 kui palju v\u00e4hem signaali suunatakse, kui signaal liigub vastupidises suunas OUT-ist IN-i<\/li>\n<\/ul>\n<p>Esmakordselt paistab see \u00fcsna segane. Selguse huvides kujutame jaoturit nagu veetoru, kus sees on v\u00e4ike k\u00f5rvalharu. See haru on loodud nii, et kui vesi liigub otse suunas (IN-ist OUT-i), suunatakse oluliselt osa veest. Selle suunamise kogus m\u00e4\u00e4ratakse jaoturi andmelehe Coupling parameetriga.<\/p>\n<p><img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/96e6f67afd733afca5ec69b6bd566af3.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nKui vesi liigub vastupidises suunas, suunatakse m\u00e4rgatavalt v\u00e4hem vett. Seda tuleks k\u00e4sitada k\u00f5rvaln\u00e4htusena. Selle liikumise k\u00e4igus suunatud vee kogus m\u00e4\u00e4ratakse andmelehe Directivity parameetriga. Mida v\u00e4iksem on see parameeter (suurem dB v\u00e4\u00e4rtus), seda parem on see meie \u00fclesande jaoks. <\/p>\n<p><img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/40ab73a0be05c89af4408c5af096bec9.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h3>P\u00f5him\u00f5tteline skeem<\/h3>\n<p>\nKuna soovime m\u00f5\u00f5ta signaali taset, mis peegeldub antennist, \u00fchendame selle vastuv\u00f5tja IN-sse ja generaatori OUT-i. Nii j\u00f5uab vastuv\u00f5tjasse osa antennist peegelduvast signaalist m\u00f5\u00f5tmiseks. <\/p>\n<p><img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/bdf04c64d65c320d65e3db4b99c99363.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nJaoturi \u00fchendusskeem. Peegeldunud signaal suunatakse vastuv\u00f5tjasse.<\/p>\n<h3>M\u00f5\u00f5tmisinstallatsioon<\/h3>\n<p>\nKoostame m\u00f5\u00f5tmisinstallatsiooni KSV m\u00f5\u00f5tmiseks vastavalt p\u00f5him\u00f5ttelisele skeemile. Generaatori v\u00e4ljundisse paigaldame t\u00e4iendava 15 dB n\u00f5rgesti atenuaatore. See parandab jaoturi sobivust generaatori v\u00e4ljundiga ja t\u00f5stab m\u00f5\u00f5tmise t\u00e4psust. Atteenuatorit saab valida 5..15 dB n\u00f5rkuse tasemega. N\u00f5rkuse tase arvestatakse automaatselt j\u00e4rgmise kalibreerimise k\u00e4igus.<\/p>\n<p><img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/7a882805d26fdee67107f38f0864850c.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nAtenu\u0430\u0442\u043e\u0440 n\u00f5rgestab signaali kindla arvu detsibelli v\u00f5rra. Atenuatori peamine omadus on signaali n\u00f5rgenemise kordaja (atenuatsioon) ja t\u00f6\u00f6 sagedusliin. T\u00f6\u00f6 sagedusliinist v\u00e4ljaspool v\u00f5ivad atenuatori omadused ettearvamatult muutuda.<\/p>\n<p>Nii n\u00e4eb v\u00e4lja l\u00f5plik seade. Samuti ei tohi unustada edastada vahepealse sageduse (V\u015a) signaali OSA-6G moodulilt seadme p\u00f5hikaardile. Selleks \u00fchendame IF OUTPUT pordi p\u00f5hikaardilt OSA-6G mooduli INPUT-iga.<\/p>\n<p><img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/d1045f27ece8d915bbc0d5afaaa94da3.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>Kantide v\u00e4hendamiseks impulsi toiteallikast viin k\u00f5ik m\u00f5\u00f5tmised l\u00e4bi s\u00fclearvuti toites akult. <br \/>\n<img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/053c4405f0f06559d97ce171a2335447.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<h2>Kalibreerimine<\/h2>\n<p>\nEnne m\u00f5\u00f5tmiste alustamist tuleb veenduda, et k\u00f5ik seadme \u00fcksused ja kaablite kvaliteet on head, selleks \u00fchendame generaatori ja vastuv\u00f5tja kaabliga otse, l\u00fclitame generaatori sisse ja teeme ACH m\u00f5\u00f5tmise. Saame peaaegu tasase graafiku 0dB juures. See t\u00e4hendab, et kogu sagedusala ulatuses on kogu generaatori kiiritatud v\u00f5imsus j\u00f5udnud vastuv\u00f5tjani. <\/p>\n<p><img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/8e5bc1632e289e083ef3abd3a9ab9cc4.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nGeneraatori \u00fchendamine otse vastuv\u00f5tjaga<\/p>\n<p>Lisame skeemile atenuatori. N\u00e4htav peaaegu lineaarne signaali n\u00f5rgenemine 15dB ulatuses kogu sagedusala. <br \/>\n<img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/490a7cb5a17313e73fb9c612d667e8f3.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nGeneraatori \u00fchendamine 15dB atenuatori kaudu vastuv\u00f5tjaga<\/p>\n<p>\u00dchendame generaatori OUT jaoturi pesasse ning vastuv\u00f5tja CPL jaoturi pesasse. Kuna IN sadamasse ei ole koormust \u00fchendatud, peaks kogu genereeritud signaal peegelduma ning osa selle vastuv\u00f5tjale suunatud olema. Vastavalt meie jaoturi andmelehtedele (<noindex><a rel=\"nofollow\" href=\"https:\/\/ww2.minicircuits.com\/pdfs\/ZEDC-15-2B.pdf\">ZEDC-15-2B<\/a><\/noindex>), on Coupling parameeter ~15db, seega peaksime n\u00e4gema horisontaalset joont umbes -30 dB tasemel (coupling + attenuatori kadu). Kuid kuna jaoturi t\u00f6\u00f6ulatus on limiteeritud 1 GHz-ini, v\u00f5ib k\u00f5iki m\u00f5\u00f5tmisi \u00fcle selle sageduse pidada m\u00f5ttetuks. See on selgelt n\u00e4ha graafikult, p\u00e4rast 1 GHz n\u00e4itajad on kaootilised ja ei oma m\u00f5tet. Seet\u00f5ttu teeme k\u00f5ik j\u00e4rgnevad m\u00f5\u00f5tmised jaoturi t\u00f6\u00f6piirkonnas.<\/p>\n<p><img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/ac734456bcd9752786af57efc9ac06bf.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nJaoturi \u00fchendamine ilma koormuseta. N\u00e4ha jaoturi t\u00f6\u00f6piirangut.<\/p>\n<p>Kuna andmed m\u00f5\u00f5tmiste kohta \u00fcle 1 GHz ei ole meie puhul m\u00f5tet, piirame generaatori maksimaalset sagedust jaoturi t\u00f6\u00f6v\u00e4\u00e4rtustega. M\u00f5\u00f5tmiste tulemusena saadud on sirge joon.<br \/>\n<img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/360c60083a6bd8ef2b46a8d24edb34e5.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nGeneraatori sageduse piiramine jaoturi t\u00f6\u00f6vahemikku<\/p>\n<p>Kuidas m\u00f5\u00f5ta antennide VSWR-i, peame kalibreerima, et v\u00f5tta praegused skeemi parameetrid (100% peegeldus) nullpunktina, s.t. null dB. Selleks on OSA103 Mini programmis sisseehitatud kalibreerimisfunktsioon. Kalibreerimine toimub ilma antenni (koormuse) \u00fchendamata, kalibreerimisandmed salvestatakse faili ja arvestatakse edaspidi automaatselt graafikute koostamisel.<br \/>\n<img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/6069e45a30f0a5a14f0ff0ab113bbb12.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nIA\u0427\u0425 kalibreerimisfunktsioon OSA103 Mini programmis<\/p>\n<p>Rakendades kalibreerimise tulemusi ja alustades m\u00f5\u00f5tmisi ilma koormuseta, saame tasase graafiku 0dB-l. <br \/>\n<img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/b916728c3dc3c644b437add9fa31736a.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nGraafik p\u00e4rast kalibreerimise sooritamist<\/p>\n<h3>M\u00f5\u00f5dame antenne<\/h3>\n<p>\nN\u00fc\u00fcd on aeg alustada antennide m\u00f5\u00f5tmist. T\u00e4nu kalibreerimisele saame n\u00e4ha ja m\u00f5\u00f5ta peegeldise v\u00e4henemist p\u00e4rast antenni \u00fchendamist. <\/p>\n<h2>Aliexpressi antenn 433MHz-l<\/h2>\n<p>\nAntenni t\u00e4histamine 443MHz. N\u00e4ha on, et antenn t\u00f6\u00f6tab k\u00f5ige t\u00f5husamalt 446MHz spektris, millel VSWR on 1.16. Samas on v\u00e4idetud sagedusel n\u00e4itajad oluliselt halvemad, 433MHz-l on VSWR 4,2.<br \/>\n<img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/7b9ba1ad3069235fb10fb92112f52097.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h2>Tundmatu antenn 1<\/h2>\n<p>\nM\u00e4rgistamata antenn. Graafiku j\u00e4rgi on see m\u00f5eldud 800 MHz sagedusele, t\u00f5en\u00e4oliselt GSM-bandaalile. Aususe nimel tuleb \u00f6elda, et see antenn t\u00f6\u00f6tab ka 1800 MHz sagedusel, kuid jaoturi piirangute t\u00f5ttu ei saa ma nende sageduste peal t\u00e4pseid m\u00f5\u00f5tmisi teha.<br \/>\n<img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/69c4c7d6084a0b835d141912f3465999.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h2>Tundmatu antenn 2<\/h2>\n<p>\nVeel \u00fcks antenn, mis on mul juba ammu kastides vedelemiseks. Tundub, et ka see on m\u00f5eldud GSM-bandaalile, kuid juba parem kui eelmine. Sagedusel 764 MHz on VSWR peaaegu \u00fcks, 900 MHz puhul on see 1.4.<br \/>\n<img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/d6c9c55c62865cf348001d2f26b0cd7b.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h2>Tundmatu antenn 3<\/h2>\n<p>\nSee n\u00e4ib olevat Wi-Fi antenn, kuid \u00fchendus on kuidagi SMA-mees, mitte RP-SMA nagu k\u00f5igil Wi-Fi antennidel. M\u00f5\u00f5tmiste j\u00e4rgi on see antenn kuni 1 MHz sagedustel kasutuks. J\u00e4llegi, jaoturi piirangute t\u00f5ttu ei saa me aru, mis antenn see on.<br \/>\n<img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/554d1bb265a202f8129882cff1d45c88.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h2>Telescopiline antenn<\/h2>\n<p>\nProovime arvutada, kui palju peab telescopiline antenn ulatuma 433 MHz vahemiku jaoks. Ahnestusvalem lainepikkuse jaoks: \u03bb = C\/f, kus C on valguse kiirus, f on sagedus.<\/p>\n<pre><code class=\"plaintext\">299.792.458 \/ 443.000.000 = 0.69719176279\n<\/code><\/pre>\n<p>\n<b>T\u00e4ispikk laine<\/b> \u2014 69,24 cm<br \/>\n<b>Pool lainepikkusest<\/b> \u2014 34,62 cm<br \/>\n<b>Neljandik lainepikkusest<\/b> \u2014 17,31 cm<\/p>\n<p><img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/928234231cbc70c38eda904650cb191f.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nNii arvutatud antenn osutus t\u00e4iesti kasulikuks. Sagedusel 433 MHz on VSWR \u2014 11. <br \/>\n<img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/828b8bc7eacb444902373ade0690e769.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\nKatsetades antenni, saavutasin minimaalsete tagasiside suheteks 2.8, kui antenni pikkus oli umbes 50 cm. Selgus, et sektsioonide paksus m\u00e4ngib suurt rolli. Kui alustada vaid \u00f5hukeste \u00e4\u00e4rmuslike sektsioonide laiendamisega, oli tulemuseks parem kui ainult paksude sektsioonide laiendamisega sama pikkuseni. Ma ei tea, kui usaldusv\u00e4\u00e4rsed need teleskoopantennide pikkuse kalkulatsioonid on, kuna praktikas need ei toimi. V\u00f5ib-olla toimib see teiste antennide v\u00f5i sagedustega teisiti, ma ei tea.<br \/>\n<img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/834043959699179660d30b5653ba7ecd.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h2>Juhe 433MHz jaoks<\/h2>\n<p>\nSageli erinevates seadmetes, nagu raadio l\u00fclitites, v\u00f5ib n\u00e4ha juhet, mis on antennina kasutatud. L\u00f5ikasin juhe vastavalt 433 MHz lainepikkuse neljandikule (17,3 cm) ja tinutasin otsa, et see tihedalt SMA female otsikusse sobiks. <\/p>\n<p><img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/32bc231d1a8cf9d54db19d3baace112c.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTulemus oli kummaline: selline juhe t\u00f6\u00f6tab h\u00e4sti 360 MHz, kuid on 433 MHz-l kasutu.<br \/>\n<img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/e28f05ef88e4306ebb4a8a77e7ae844c.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nHakkasin j\u00e4rk-j\u00e4rgult juhet otst \u00e4ra l\u00f5ikama ja j\u00e4lgisin n\u00e4idikuid. Graafiku langus hakkas aeglaselt liikuma paremale, 433 MHz suunas. L\u00f5puks, umbes 15,5 cm pikkuse juhega, \u00f5nnestus mul saavutada madalaim QSV v\u00e4\u00e4rtus 1.8 sagedusel 438 MHz. Edasi l\u00fchendamine juhtme pikkust t\u00f5i kaasa QSV suurenemise.<br \/>\n<img decoding=\"async\" alt=\"Millisele sagedusele see antenn on? M\u00f5\u00f5dame antennide omadusi\" src=\"\/wp-content\/uploads\/2019\/04\/42496a059f333808e836b5a62c281a7b.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<h2>Kokkuv\u00f5te<\/h2>\n<p>\nJaguri piirangute t\u00f5ttu ei \u00f5nnestunud m\u00f5\u00f5ta antenne sagedustel \u00fcle 1 GHz, n\u00e4iteks Wi-Fi antenne. Seda oleks saanud teha, kui mul oleks olnud laiem sagedusvahemikuga jagur.<\/p>\n<p>Jagur, \u00fchenduskaablid, seade ja isegi s\u00fclearvuti \u2013 need on osad valmivast antennis\u00fcsteemist. Nende geomeetria, asend ruumis ja \u00fcmbritsevad objektid m\u00f5jutavad m\u00f5\u00f5tmistulemust. P\u00e4rast paigaldamist reaalsesse raadiosaatjasse v\u00f5i modemisse v\u00f5ib sagedus nihkuda, kuna raadiosaatja korpus, modem ja operaatori keha muutuvad antenni osaks.<\/p>\n<p>OSA103 Mini on v\u00e4ga \u00e4ge multifunktsionaalne seade. T\u00e4nan selle loojaid m\u00f5\u00f5tmiste tegemise konsultatsioonide eest.<br \/>\n<br \/>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/447092\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u2014 \u041d\u0430 \u043a\u0430\u043a\u043e\u0439 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d \u044d\u0442\u0430 \u0430\u043d\u0442\u0435\u043d\u043d\u0430? \u2014 \u041d\u0435 \u0437\u043d\u0430\u044e, \u043f\u0440\u043e\u0432\u0435\u0440\u044c. \u2014 \u041a\u0410\u0410\u0410\u041a?!?! \u041a\u0430\u043a \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u044c, \u0447\u0442\u043e \u0437\u0430 \u0430\u043d\u0442\u0435\u043d\u043d\u0430 \u0443 \u0432\u0430\u0441 \u0432 \u0440\u0443\u043a\u0430\u0445, \u0435\u0441\u043b\u0438 \u043d\u0430 \u043d\u0435\u0439 \u043d\u0435\u0442 \u043c\u0430\u0440\u043a\u0438\u0440\u043e\u0432\u043a\u0438? \u041a\u0430\u043a \u043f\u043e\u043d\u044f\u0442\u044c, \u043a\u0430\u043a\u0430\u044f \u0430\u043d\u0442\u0435\u043d\u043d\u0430 \u043b\u0443\u0447\u0448\u0435 \u0438\u043b\u0438 \u0445\u0443\u0436\u0435? \u042d\u0442\u0430 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043c\u0435\u043d\u044f \u043c\u0443\u0447\u0438\u043b\u0430 \u0434\u0430\u0432\u043d\u043e. \u0412 \u0441\u0442\u0430\u0442\u044c\u0435 \u043f\u0440\u043e\u0441\u0442\u044b\u043c \u044f\u0437\u044b\u043a\u043e\u043c \u043e\u043f\u0438\u0441\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u043c\u0435\u0442\u043e\u0434\u0438\u043a\u0430 \u0438\u0437\u043c\u0435\u0440\u0435\u043d\u0438\u044f \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a \u0430\u043d\u0442\u0435\u043d\u043d, \u0438 \u0441\u043f\u043e\u0441\u043e\u0431 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u044f \u0447\u0430\u0441\u0442\u043e\u0442\u043d\u043e\u0433\u043e \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d\u0430 \u0430\u043d\u0442\u0435\u043d\u043d\u044b. \u041e\u043f\u044b\u0442\u043d\u044b\u043c \u0440\u0430\u0434\u0438\u043e\u0438\u043d\u0436\u0435\u043d\u0435\u0440\u0430\u043c [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":23504,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-31582","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u2014 \u041d\u0430 \u043a\u0430\u043a\u043e\u0439 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d \u044d\u0442\u0430 \u0430\u043d\u0442\u0435\u043d\u043d\u0430? 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Measurement of antenna characteristics | ProHoster","description":"\u2014 Millise sageduse jaoks see antenn on? \u2014 Ei tea, kontrolli. \u2014 KUIDENA?!?! Kuidas teada saada, millisest antennist on k\u00fcsimus, kui sellel pole m\u00e4rgistust? Kuidas m\u00f5ista, milline antenn on parem v\u00f5i halvem? See probleem on mind kaua vaevanud. Artiklis on selgelt kirjas meetod antennide omaduste m\u00f5\u00f5tmiseks ja antenni sagedusvahemiku m\u00e4\u00e4ramise viis.","canonical_url":"https:\/\/prohoster.info\/et\/blog\/administrirovanie\/na-kakoj-diapazon-eta-antenna-izmeryaem-harakteristiki-antenn","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041d\u0430 \u043a\u0430\u043a\u043e\u0439 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d \u044d\u0442\u0430 \u0430\u043d\u0442\u0435\u043d\u043d\u0430? \u0418\u0437\u043c\u0435\u0440\u044f\u0435\u043c \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0438 \u0430\u043d\u0442\u0435\u043d\u043d | ProHoster","og:description":"\u2014 \u041d\u0430 \u043a\u0430\u043a\u043e\u0439 \u0434\u0438\u0430\u043f\u0430\u0437\u043e\u043d \u044d\u0442\u0430 \u0430\u043d\u0442\u0435\u043d\u043d\u0430? \u2014 \u041d\u0435 \u0437\u043d\u0430\u044e, \u043f\u0440\u043e\u0432\u0435\u0440\u044c. \u2014 \u041a\u0410\u0410\u0410\u041a?!?! 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