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href="http://www.cdcfah.com/zx/"><span>新聞資訊</span></a></li><li id = "index_article"><a href="http://www.cdcfah.com/xw/"><span>行業(yè)資訊</span></a></li><li id = "index_show"><a href="http://www.cdcfah.com/zh/"><span>展會(huì)信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="z3yctvj" class="twoCol"><div id="baszl3x" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_txcp/">通信產(chǎn)品</a>?<a href="http://www.cdcfah.com/cp/second-txcp_tianxianyk/">天線</a>?<a href="http://www.cdcfah.com/cp/third-tianxianyk_txtxhv/">通信天線</a>?莆田定向天線歡迎咨詢泉州市天陸通信科技供應(yīng)</p><div id="tcj2j8i" class="leftbox clearfix"><h1>莆田定向天線歡迎咨詢泉州市天陸通信科技供應(yīng)</h1><div id="gfripqp" class="proBig"><div id="8jszlx4" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422024084813_qztl_5275716.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="z28fwd9" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422024084813_qztl_5275716.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="uypm3cj" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>福建省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>莆田定向天線,天線</p><p><span>***更新：</span>2020-07-10 08:19:25</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="yxjluaz" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">泉州市天陸通信科技有限公司</a></p><p><span>聯(lián)系人：</span>景經(jīng)理</p><p><span>郵箱: </span>3131314848@qq.com</p><p><span>電話: </span>18520272999</p><p><span>傳真: </span>0595_22002867</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0595-22001867</p><p><span>地址: </span>福建省泉州市豐澤區(qū)北峰工業(yè)區(qū)豐盛路20號(hào) </p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="dsugxjn" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="32nbsoi" class="box"><p><p> 玻璃鋼天線為什么不適合室內(nèi)使用估計(jì)可能很多人會(huì)注意到一點(diǎn)，便是linksys或許dlink這樣的國際品牌，他們生產(chǎn)的設(shè)備上一般都只用7db或許5db、2db的天線，莆田定向天線，卻很少看見市道上有他們的9db或許更高增益的室內(nèi)全向天線出現(xiàn)，依照我們一般思想的理解，室內(nèi)運(yùn)用，7db天線已徹底滿足要求，7db以上的天線，由于視點(diǎn)更小，無法發(fā)揮出優(yōu)勢，在室內(nèi)運(yùn)用可能還會(huì)拔苗助長。故9db以上的全向天線必定建議在室外運(yùn)用，至于還有人說室內(nèi)用穿墻作用好，這個(gè)說法禁不起驗(yàn)證，不用過于信任，莆田定向天線。無線電天饋系統(tǒng)建立中常說的全向天線是指：水平輻射視點(diǎn)為360度的天線，莆田定向天線，筆直則呈扇形發(fā)射，視點(diǎn)一般6~15度左右，增益越高，其筆直的視點(diǎn)越小，比如，9db的天線，輻射視點(diǎn)能夠做到14度左右。高頻無線通信的主要問題是信號(hào)的衰落，普通全向天線或定向天線都會(huì)因衰落使信號(hào)失真較大。莆田定向天線</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="莆田定向天線,天線" src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422024084813_qztl_5275716.jpg"></div><p> 4G天線的分類辦法許多，按使用范圍分類，有通訊4G天線、播送和電視4G天線、雷達(dá)4G天線、導(dǎo)航4G天線、側(cè)向4G天線等；依照作業(yè)波長，4G天線可分為長波4G天線、超長波4G天線、中波4G天線、短波和超短波4G天線、微波4G天線;依照4G天線上電流散布的方式,4G天線可分為駐波4G天線和行波4G天線;按極化特性,4G天線可分為線極化（垂直極化和水平極化）4G天線、圓極化4G天線和橢圓極化4G天線；依照頻率函數(shù)的功能分類，有電小4G天線、諧振4G天線、寬帶4G天線和口勁4G天線等。4G天線的剖析辦法與它的構(gòu)造有很大的聯(lián)系，為了理論剖析的便利，一般依照構(gòu)造的不同，將4G天線分為兩類：一類是由半徑遠(yuǎn)小于波長的金屬導(dǎo)線構(gòu)成的線4G天線，首要用于長波、短波和超短波。多見的線4G天線包含對稱振子、圓（或方）環(huán)4G天線、螺線4G天線等。另一類是由尺度大于波長的金屬或介質(zhì)面構(gòu)成的面4G天線，首要用于微波波段，包含喇叭4G天線、拋物面4G天線等。先介紹線4G天線，然后在對面4G天線進(jìn)行剖析。4G天線的研討首要觸及剖析、規(guī)劃和歸納三個(gè)方面。4G天線的剖析是斷定給定4G天線構(gòu)造的方向和阻抗特性。4G天線的理論剖析，實(shí)際上是研討4G天線所發(fā)生的空間電磁場剖析，以及該場剖析所決議的4G天線特性。溫州天線廠家天線向多元化方向開展。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="莆田定向天線,天線" src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422024084813_qztl_8772465.jpg"></div><p> GPS天線的分類 </p> <p> 1 如果是從極化方式上來看的話，GPS天線大致能夠分為垂直計(jì)劃以及圓形極化。 </p> <p> 如果**是以目前的技術(shù)，垂直極化的效果還是比不上圓形極化的。故除非是特殊情況，普通的GPS天線基本都是采用圓形極化。 </p> <p> ⒉如果是從放置方式來分，那么GPS天線能夠分為內(nèi)置天線以及外置天線。 </p> <p> 其實(shí)天線的裝配位置是非常重要的，在早期的時(shí)候GPS手持機(jī)基本都是采用外翻式的天線，而這時(shí)候天線和整機(jī)的內(nèi)部基本上都是隔離的，而EMI則幾乎不會(huì)對其造成任何的影響，而且收星的效果非常的好。而如今由于小型化的潮流，GPS天線基本都是采用的內(nèi)置，那么天線則必須要在所有金屬器件上方，殼內(nèi)還需要進(jìn)行電鍍同時(shí)進(jìn)行良好的接地，遠(yuǎn)離EMI干擾源，例如CPU、SD卡、SDRAM、晶振、DC/DC。 </p><p> 車載天線是指設(shè)計(jì)安裝在車輛上的移動(dòng)通訊天線，常見的就是吸盤天線。由于吸盤天線安裝擺放容易，所以在一些簡易設(shè)臺(tái)場合常常用吸盤天線代替基地臺(tái)天線。選購車載天線。車載天線結(jié)構(gòu)上有縮短型、四分之一波長、中部加感型、八分之五波長、雙二分之一波長等形式的天線，理論上它們的效率依次增加，同樣工作頻段的天線的長度也依次增加。由于車輛本身有限高，加上過長的天線在車輛高速行進(jìn)時(shí)形成的風(fēng)阻，過橋洞、進(jìn)入地下車庫都是問題，所以車載天線并不是越長越好，一般要求轎車天線不超過70厘米，面包車類要求天線更短?？s短型天線體積小巧，雖然增益不高，但適合使用于需要隱蔽天線的場合。一般的警用車輛建議安裝高增天線，尤其是在活動(dòng)區(qū)域范圍比較大的車輛，350MHZ高增益天線多分為八分之五波長加感的形式，在距天線頂部二分之一波長距離處有一個(gè)加感線圈。400MHZ頻段雙二分之一波長天線具有較高的增益，它的外觀特征是天線的振子上有兩個(gè)加感線圈。八分之五波長天線和中部加感型天線也有較高的增益，且價(jià)格比較便宜，因此得到廣的使用。在作為臨時(shí)固定臺(tái)天線使用的場合可以考慮選用增益高的吸盤天線，天線的長度不必有過多限制。由于吸盤天線是根據(jù)汽車使用環(huán)境而設(shè)計(jì)。平板天線結(jié)構(gòu)的揭秘如果我們將平板天線的天線面縱向切開的話，我們就會(huì)見到這個(gè)天線面是由五層結(jié)構(gòu)組成。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="莆田定向天線,天線" src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422045340797_qztl_8940554.jpg"></div><p> GPS系統(tǒng)精度高、可一連導(dǎo)航，有很強(qiáng)的抗干擾本領(lǐng)更重要的是它可以提供七維的時(shí)空位置速度信息，在帆海導(dǎo)航中發(fā)揮著重要作用，據(jù)正大信維小編了解，很難想象哪一條船舶不裝備GPS導(dǎo)航系統(tǒng)和裝備部署，GPS導(dǎo)航在航海領(lǐng)域的應(yīng)用非常重要。GPS航海導(dǎo)航用戶繁多，其分類標(biāo)準(zhǔn)也各不相同，若根據(jù)航路類型分別、GPS航海導(dǎo)航可以分為五大類：遠(yuǎn)洋導(dǎo)航、海岸導(dǎo)航、港口導(dǎo)航、內(nèi)河導(dǎo)航、湖泊導(dǎo)航。不同階段或地區(qū)，對航行安全要求也因環(huán)境差別而不同，但都是為了保證**小航行交通，有用地利用日益擁擠的航路，保證航行安全，提高交通運(yùn)輸效益，節(jié)省能源。根據(jù)導(dǎo)航系統(tǒng)的功能分別有以下幾類：1、自主導(dǎo)航自主導(dǎo)航系統(tǒng)適于上述五種航路的任何一種，它基本上是一種單純的導(dǎo)航體系，其主要特性是*向用戶提供位置、航速、航向和時(shí)間信息，也可包括海圖航跡顯示，不需通信系統(tǒng)。適用于任何海面、湖面和內(nèi)河上航行的船舶，從大型遠(yuǎn)洋貨輪到私家游艇。2、港口管理和進(jìn)港引導(dǎo)這種系統(tǒng)主要用在港口/碼頭的船舶調(diào)度管理、進(jìn)港船舶引導(dǎo)，以確保港口/碼頭航行的安全和秩序。該系統(tǒng)需要雙向數(shù)據(jù)/語音通訊，以便于領(lǐng)航員引導(dǎo)船舶，港區(qū)情境/海圖顯示，以表明停泊的船舶和可利用的進(jìn)港航線，避免。從性能價(jià)格比出發(fā)，人們常常選用柵狀拋物面天線作為直放站施主天線。浙江對講機(jī)天線</p><p style="text-indent:25px">GPS就是通過接受衛(wèi)星信號(hào)，進(jìn)行定位或者導(dǎo)航的終端。莆田定向天線</p><p> 這種系統(tǒng)對導(dǎo)航系統(tǒng)的精度要求高，要使用差分GPS和其他加強(qiáng)技能。3、航路交通管理系統(tǒng)這類體系與2類似，但主要用于近海和內(nèi)陸河航路上的船舶導(dǎo)航和管理，通常必要衛(wèi)星通訊系統(tǒng)支持。4、跟隨監(jiān)視系統(tǒng)這類系統(tǒng)主要用于海上巡邏艇、緝私艇及各種游艇，特別是私家游艇以防盜根據(jù)具體的使用對象，有些系統(tǒng)需要給出導(dǎo)航參量和雙向數(shù)據(jù)/話音通訊，如緝私艇。而有時(shí)則不需要給出導(dǎo)航參量，如用于私家游艇防盜，*需要單向數(shù)據(jù)通訊，一旦發(fā)生被盜，游艇上的導(dǎo)航系統(tǒng)不停把自己的位置和航向送到有關(guān)中心，以便于跟隨。5、緊急救援系統(tǒng)系統(tǒng)也包括兩棲飛機(jī)，直升機(jī)和陸地車輛。它適應(yīng)于所有五類航路，用于搜尋和救援各種海面、湖面、內(nèi)河上的遇險(xiǎn)、遇難船舶和職員。這類系統(tǒng)需要雙向數(shù)據(jù)/話音通訊，要求響應(yīng)時(shí)間快、定位精度高。6、GPS/聲納組合用于水下機(jī)器人導(dǎo)航該類組合系統(tǒng)可用于水下管道鋪設(shè)和維修(需要視覺系統(tǒng))，水文測量以及別的海下作業(yè)，如用于港口/碼頭水下勘測，以便于進(jìn)場航道阻塞物掃除，保證航道流通，也可用于遠(yuǎn)洋捕撈，漁船作業(yè)引導(dǎo)等。莆田定向天線</p><p style="text-indent:25px">泉州市天陸通信科技有限公司注冊資金2000-3000萬元，是一家擁有51~100人***員工的企業(yè)。公司業(yè)務(wù)分為[ "玻璃鋼天線", "車載天線", "船舶天線", "對講機(jī)天線" ]等，目前不斷進(jìn)行創(chuàng)新和服務(wù)改進(jìn)，為客戶提供質(zhì)量的產(chǎn)品和服務(wù)。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠信為本的理念，打造通信產(chǎn)品質(zhì)量品牌。公司自成立以來發(fā)展迅速，業(yè)務(wù)不斷發(fā)展壯大，年?duì)I業(yè)額度達(dá)到500-700萬元，未來我們將不斷進(jìn)行創(chuàng)新和改進(jìn)，讓企業(yè)發(fā)展再上新高。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/555436.html</p></div></div></div></div></div><div id="s3cg8nz" class="page-right twoColRt"><div id="hby7h4j" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="nce33dp" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="fzbnjam" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img 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