{"id":11326,"date":"2021-11-23T20:42:40","date_gmt":"2021-11-23T13:42:40","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=11326"},"modified":"2021-11-23T21:13:11","modified_gmt":"2021-11-23T14:13:11","slug":"ta%cc%a3i-sao-die%cc%a3n-thoa%cc%a3i-di-do%cc%a3ng-co-the%cc%89-go%cc%a3i-di-khap-mo%cc%a3i-noi","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/ta%cc%a3i-sao-die%cc%a3n-thoa%cc%a3i-di-do%cc%a3ng-co-the%cc%89-go%cc%a3i-di-khap-mo%cc%a3i-noi\/","title":{"rendered":"Ta\u0323i sao \u0111i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng co\u0301 th\u00ea\u0309 go\u0323i \u0111i kh\u0103\u0301p mo\u0323i n\u01a1i?"},"content":{"rendered":"\n<p>Tr\u00ean thi\u0323 tr\u01b0\u01a1\u0300ng hi\u00ea\u0323n nay, co\u0301 r\u00e2\u0301t nhi\u00ea\u0300u loa\u0323i \u0111i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng va\u0300 \u0111i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng \u0111\u01b0\u01a1\u0323c du\u0300ng ph\u00f4\u0309 bi\u00ea\u0301n, b\u01a1\u0309i vi\u0300 no\u0301 r\u00e2\u0301t thu\u00e2\u0323n ti\u00ea\u0323n, co\u0301 th\u00ea\u0309 li\u00ean la\u0323c v\u01a1\u0301i mo\u0323i ng\u01b0\u01a1\u0300i \u01a1\u0309 mo\u0323i lu\u0301c mo\u0323i n\u01a1i, phu\u0300 h\u01a1\u0323p v\u01a1\u0301i nhi\u0323p s\u00f4\u0301ng va\u0300 c\u00f4ng vi\u00ea\u0323c th\u01a1\u0300i hi\u00ea\u0323n \u0111a\u0323i. Khi \u0111i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng m\u01a1\u0301i ra \u0111\u01a1\u0300i, gia\u0301 ca\u0309 cu\u0309a no\u0301 r\u00e2\u0301t \u0111\u0103\u0301t. \u0110a\u0303 co\u0301 th\u01a1\u0300i \u0111i\u00ea\u0309m \u0111i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng \u0111\u01b0\u01a1\u0323c coi la\u0300 ti\u00eau chu\u00e2\u0309n \u0111\u00ea\u0309 \u0111a\u0301nh gia\u0301 \u0111i\u0323a vi\u0323 xa\u0303 h\u00f4\u0323i cu\u0309a chu\u0309 nh\u00e2n, ng\u01b0\u01a1\u0300i na\u0300o du\u0300ng \u0111i\u00ea\u0323n thoa\u0323i ca\u0300ng \u0111\u0103\u0301t ti\u00ea\u0300n thi\u0300 ch\u01b0\u0301ng to\u0309 ng\u01b0\u01a1\u0300i \u0111o\u0301 ca\u0300ng gia\u0300u co\u0301. V\u00e2\u0323y, ta\u0323i sao \u0111i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng co\u0301 th\u00ea\u0309 go\u0323i \u0111i kh\u0103\u0301p mo\u0323i n\u01a1i?<\/p>\n\n\n\n<p>\u0110i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng la\u0300 m\u00f4\u0323t loa\u0323i \u0111i\u00ea\u0323n thoa\u0323i du\u0300ng so\u0301ng v\u00f4 tuy\u00ea\u0301n. No\u0301 kha\u0301c v\u01a1\u0301i ca\u0301c \u0111i\u00ea\u0323n thoa\u0323i c\u00f4\u0301 \u0111i\u0323nh. Chu\u0301ng ta co\u0301 th\u00ea\u0309 th\u00e2\u0301y \u0111i\u00ea\u0323n thoa\u0323i c\u00f4\u0301 \u0111i\u0323nh g\u00f4\u0300m co\u0301 ba b\u00f4\u0323 ph\u00e2\u0323n: ba\u0300n phi\u0301m, \u00f4\u0301ng nghe va\u0300 d\u00e2y ca\u0301p n\u00f4\u0301i v\u01a1\u0301i t\u00f4\u0309ng \u0111a\u0300i. Co\u0300n \u0111i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng hi\u0300nh da\u0301ng nho\u0309, kh\u00f4ng co\u0301 d\u00e2y \u0111i\u00ea\u0323n thoa\u0323i, th\u00e2n ma\u0301y co\u0301 m\u00f4\u0323t ma\u0300n hi\u0300nh nho\u0309, co\u0301 th\u00ea\u0309 hi\u00ea\u0309n thi\u0323, l\u01b0u tr\u01b0\u0303 ca\u0301c s\u00f4\u0301 \u0111i\u00ea\u0323n thoa\u0323i, va\u0300 nhi\u00ea\u0300u c\u00f4ng du\u0323ng kha\u0301c, phi\u0301a d\u01b0\u01a1\u0301i cu\u0309a ma\u0301y la\u0300 ca\u0301c phi\u0301m ch\u01b0\u0303 va\u0300 s\u00f4\u0301.<\/p>\n\n\n\n<p>\u0110i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng s\u01a1\u0309 di\u0303 co\u0301 th\u00ea\u0309 hoa\u0323t \u0111\u00f4\u0323ng \u0111\u01b0\u01a1\u0323c la\u0300 nh\u01a1\u0300 co\u0301 m\u00f4\u0323t ma\u0323ng l\u01b0\u01a1\u0301i th\u00f4ng tin v\u00f4 tuy\u00ea\u0301n chia tha\u0300nh nhi\u00ea\u0300u khu v\u01b0\u0323c, m\u00f4\u0303i khu v\u01b0\u0323c th\u01b0\u01a1\u0300ng \u0111\u01b0\u01a1\u0323c l\u0103\u0301p \u0111\u0103\u0323t nhi\u00ea\u0300u tra\u0323m thu pha\u0301t so\u0301ng \u0111i\u00ea\u0323n thoa\u0323i. Ca\u0301c tra\u0323m thu pha\u0301t na\u0300y co\u0301 vai tro\u0300 nh\u01b0 m\u00f4\u0323t t\u00f4\u0309ng \u0111a\u0300i di \u0111\u00f4\u0323ng g\u00f4\u0300m ba \u0103ngten hi\u0300nh qua\u0323t, m\u00f4\u0303i \u0103ngten chi\u0323u tra\u0301ch nhi\u00ea\u0323m thu pha\u0301t so\u0301ng trong pha\u0323m vi 120 \u0111\u00f4\u0323, vi\u0300 v\u00e2\u0323y chi\u0309 c\u00e2\u0300n ba c\u00f4\u0323t \u0103ngten la\u0300 co\u0301 th\u00ea\u0309 phu\u0309 so\u0301ng ca\u0309 m\u00f4\u0323t khu v\u01b0\u0323c (360 \u0111\u00f4\u0323).<\/p>\n\n\n\n<p>Khi ba\u0323n go\u0323i \u0111i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng, h\u00ea\u0323 th\u00f4\u0301ng vi \u0111i\u00ea\u0323n t\u01b0\u0309 trong ma\u0301y se\u0303 t\u01b0\u0323 \u0111\u00f4\u0323ng k\u00ea\u0301t n\u00f4\u0301i v\u01a1\u0301i tra\u0323m thu pha\u0301t \u01a1\u0309 khu v\u01b0\u0323c \u0111o\u0301 b\u0103\u0300ng so\u0301ng v\u00f4 tuy\u00ea\u0301n, \u0103ngten cu\u0309a tra\u0323m thu pha\u0301t \u0111o\u0301 la\u0323i k\u00ea\u0301t n\u00f4\u0301i v\u01a1\u0301i t\u00f4\u0309ng \u0111a\u0300i trung t\u00e2m, t\u00f4\u0309ng \u0111a\u0300i na\u0300y se\u0303 n\u00f4\u0301i ma\u0323ng v\u01a1\u0301i tra\u0323m thu pha\u0301t \u01a1\u0309 khu v\u01b0\u0323c ma\u0300 ba\u0323n c\u00e2\u0300n go\u0323i, t\u00e2\u0301t ca\u0309 \u0111\u00ea\u0300u \u0111\u01b0\u01a1\u0323c th\u01b0\u0323c hi\u00ea\u0323n th\u00f4ng qua ma\u0323ng l\u01b0\u01a1\u0301i so\u0301ng v\u00f4 tuy\u00ea\u0301n, do v\u00e2\u0323y hai ng\u01b0\u01a1\u0300i co\u0301 th\u00ea\u0309 \u0111a\u0300m thoa\u0323i v\u01a1\u0301i nhau. T\u00f4\u0309ng \u0111a\u0300i trung t\u00e2m kh\u00f4ng chi\u0309 \u0111\u01b0\u01a1\u0323c l\u0103\u0301p \u0111\u0103\u0323t ca\u0301c thi\u00ea\u0301t bi\u0323 t\u01b0\u0323 \u0111\u00f4\u0323ng k\u00ea\u0301t n\u00f4\u0301i ma\u0300 no\u0301 co\u0300n co\u0301 ca\u0301c thi\u00ea\u0301t bi\u0323 gia\u0301m sa\u0301t &#8220;ha\u0300nh tung&#8221; \u0111i\u00ea\u0323n thoa\u0323i \u01a1\u0309 mo\u0323i n\u01a1i phu\u0323c vu\u0323 cho c\u00f4ng ta\u0301c an ninh vi\u00ea\u0303n th\u00f4ng, t\u00e2\u0300n su\u00e2\u0301t k\u00ea\u0301t n\u00f4\u0301i \u0111\u01b0\u01a1\u0323c ph\u00e2n theo t\u01b0\u0300ng khu v\u01b0\u0323c. Khi \u0111i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng cu\u0300ng chu\u0309 nh\u00e2n t\u01b0\u0300 n\u01a1i na\u0300y \u0111\u00ea\u0301n n\u01a1i kha\u0301c, thi\u0300 ca\u0301c \u0103ngten thu pha\u0301t so\u0301ng se\u0303 \u0111i\u0323nh vi\u0323 t\u00e2\u0300n s\u00f4\u0301 va\u0300 k\u00ea\u0301t n\u00f4\u0301i v\u01a1\u0301i t\u00f4\u0309ng \u0111a\u0300i, t\u00f4\u0309ng \u0111a\u0300i trung t\u00e2m se\u0303 k\u00ea\u0301t n\u00f4\u0301i v\u01a1\u0301i khu v\u01b0\u0323c c\u00e2\u0300n go\u0323i. Do \u0111o\u0301, du\u0300 \u0111i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng co\u0301 \u01a1\u0309 \u0111\u00e2u t\u00f4\u0300ng \u0111a\u0300i v\u00e2\u0303n k\u00ea\u0301t n\u00f4\u0301i \u0111\u01b0\u01a1\u0323c, va\u0300 chu\u0301ng ta co\u0301 th\u00ea\u0309 \u0111a\u0300m thoa\u0323i v\u01a1\u0301i nhau b\u0103\u0300ng \u0111i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng m\u00f4\u0323t ca\u0301ch d\u00ea\u0303 da\u0300ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tr\u00ean thi\u0323 tr\u01b0\u01a1\u0300ng hi\u00ea\u0323n nay, co\u0301 r\u00e2\u0301t nhi\u00ea\u0300u loa\u0323i \u0111i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng va\u0300 \u0111i\u00ea\u0323n thoa\u0323i di \u0111\u00f4\u0323ng \u0111\u01b0\u01a1\u0323c du\u0300ng ph\u00f4\u0309 bi\u00ea\u0301n, b\u01a1\u0309i vi\u0300 no\u0301 r\u00e2\u0301t thu\u00e2\u0323n ti\u00ea\u0323n, co\u0301 th\u00ea\u0309 li\u00ean la\u0323c v\u01a1\u0301i mo\u0323i ng\u01b0\u01a1\u0300i \u01a1\u0309 mo\u0323i lu\u0301c mo\u0323i n\u01a1i, phu\u0300 h\u01a1\u0323p v\u01a1\u0301i nhi\u0323p s\u00f4\u0301ng va\u0300 c\u00f4ng vi\u00ea\u0323c th\u01a1\u0300i hi\u00ea\u0323n \u0111a\u0323i. Khi \u0111i\u00ea\u0323n thoa\u0323i di [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[1,15],"tags":[],"class_list":["post-11326","post","type-post","status-publish","format-standard","hentry","category-general","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/11326","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=11326"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/11326\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=11326"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=11326"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=11326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}