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"index_show"><a href="http://www.cdcfah.com/zh/"><span>展會信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="ztihyvh" class="twoCol"><div id="q7vbovx" class="page-proshow clearfix"><p class="current"> 當前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應</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>?廣州玻璃鋼天線來電咨詢泉州市天陸通信科技供應</p><div id="85ikr7h" class="leftbox clearfix"><h1>廣州玻璃鋼天線來電咨詢泉州市天陸通信科技供應</h1><div id="ixmnfhe" class="proBig"><div id="ixegszg" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422024084813_qztl_8772465.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="pzwoqxu" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422024084813_qztl_8772465.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="2xwogip" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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)品關鍵詞：</span>廣州玻璃鋼天線,天線</p><p><span>***更新：</span>2020-11-27 02:03:34</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="uoby2oj" 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: </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 </p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="3pgnhyk" class="page-proshow02"><p class="title">詳細說明</p><div id="xmovxtv" class="box"><p><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劃以及圓形極化。 </p> <p> 如果**是以目前的技術，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> 其實天線的裝配位置是非常重要的，在早期的時候GPS手持機基本都是采用外翻式的天線，而這時候天線和整機的內(nèi)部基本上都是隔離的，而EMI則幾乎不會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，廣州玻璃鋼天線，殼內(nèi)還需要進行電鍍同時進行良好的接地，遠離EMI干擾源，廣州玻璃鋼天線，例如CPU、SD卡，廣州玻璃鋼天線、SDRAM、晶振、DC/DC。移動通信常用的基站天線、直放站天線與室內(nèi)天線。廣州玻璃鋼天線</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣州玻璃鋼天線,天線" src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422024084813_qztl_8772465.jpg"></div><p style="text-indent:25px">天線是移動通信系統(tǒng)中重要的組成部分，其質量好壞對通信系統(tǒng)有直接的影響，**終影響手機的通信質量和網(wǎng)絡的傳輸速度，基站在移動通信中的位置比較固定，用戶數(shù)量較大，所以正大信維通信天線認為，基站在選擇天線時應該具備下述要求。 1、通信天線要有很高的增益。 2、天線的輻射方向應覆蓋整個服務區(qū)域。 3、天線可在多個頻段工作，具有高帶寬。 4、天線與收發(fā)器之間要有良好的阻抗匹配。 5、通信天線的尺寸盡可能小，結構盡可能緊湊。 6、天線多為線性偏振光，基站天線多為全向高增益天線。廣州玻璃鋼天線天線可以理解為信號發(fā)送器和，收發(fā)器天線之間的無線電信號強度滿足信道傳輸方程式和多徑衰落特性。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣州玻璃鋼天線,天線" src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422046903737_qztl_4891799.jpg"></div><p style="text-indent:25px">??車載天線是指設計安裝在車輛上的移動通訊天線，**常見就是吸盤天線。由于吸盤天線安裝擺放容易，所以在一些簡易設臺場合常常用吸盤天線代替基地臺天線。車載天線結構上有縮短型、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時形成的風阻，過橋洞、進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。　? ?? 縮短型天線體積小巧，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，且價格比較便宜，因此得到廣的使用。在作為臨時固定臺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。</p><p> GPS系統(tǒng)精度高、可一連導航，有很強的抗干擾本領更重要的是它可以提供七維的時空位置速度信息，在帆海導航中發(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導航系統(tǒng)和裝備部署，GPS導航在航海領域的應用非常重要。GPS航海導航用戶繁多，其分類標準也各不相同，若根據(jù)航路類型分別、GPS航海導航可以分為五大類：遠洋導航、海岸導航、港口導航、內(nèi)河導航、湖泊導航。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，提高交通運輸效益，節(jié)省能源。根據(jù)導航系統(tǒng)的功能分別有以下幾類：1、自主導航自主導航系統(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航體系，其主要特性是*向用戶提供位置、航速、航向和時間信息，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，從大型遠洋貨輪到私家游艇。2、港口管理和進港引導這種系統(tǒng)主要用在港口/碼頭的船舶調(diào)度管理、進港船舶引導，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，以便于領航員引導船舶，港區(qū)情境/海圖顯示，以表明停泊的船舶和可利用的進港航線，避免。平板天線結構的揭秘如果我們將平板天線的天線面縱向切開的話，我們就會見到這個天線面是由五層結構組成。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣州玻璃鋼天線,天線" src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422024553695_qztl_8905960.jpg"></div><p> 汽車天線如何保養(yǎng)？1、洗車順便擦天線每次洗車的時候，順便把天線擦拭一下。把汽車天線核拉出來，擦掉上面的灰塵和臟東西，然后把它擦干。2、檢查天線必須和車身鈑金結合要想收音效果好，則天線必須和車身鈑金密切地接合。有時候甚至只有一點銹也會造成收音不良。所以要定期檢查天線的底座，并且做清理。首先要松開天線底座的螺母。把飯金上的洞口和天線底部的銹用砂紙或小鋼刷除掉，擦拭干凈后，檢查一下天線和鈑金之間的墊片是不是完整，有沒有老化。另外天線桿身螺紋上的銹也要清一清.等一切都搞定之后，把天線依序上緊，但不要上得太緊.以免把螺紋旋壞，或者把鈑金洞口部位搞得變形。檢查天線和收音機兩端所有的線頭和接頭，除掉所有的灰塵與污垢，糾正所有接觸不良或者沒有插緊的地方。以上所有內(nèi)容就是汽車天線的安裝和保養(yǎng)方法，大家所了解的汽車天線是一個靜電釋放器，主要是將行駛中汽車外殼積聚的靜電釋放出來，保護乘員安全和汽車電路。一根小小的汽車天線，同時具備了數(shù)字廣播、移動電視、GPS導航和語言識別等多種功能，用于接收和加強收音信號,目前的我國大部分地區(qū)信號多很弱,汽車還需外置天線,在信號不穩(wěn)定的地區(qū)有很大的幫助。如果是車載天線，車上的整流器對電瓶的輸出電壓要保證在15V以下。溫州5G天線</p><p style="text-indent:25px">按運用范圍分類，有通訊4G天線、廣播和電視4G天線、雷達4G天線、導航4G天線；廣州玻璃鋼天線</p><p>八木天線歸于較高增益的定向天線，由日本東北大學的八木秀次和宇田太郞兩人創(chuàng)造，具有增益較高、結構輕盈、架起便利、價格便宜等長處。因而，它特別適用于點對點的通訊或許將室外信號引進到室內(nèi)，例如它是室內(nèi)散布體系室外接納天線的優(yōu)先類型。比如某區(qū)域室內(nèi)手機信號特別弱期望改進，八木天線是首要。八木天線的單元數(shù)越多，其增益越高，通常選用6~12單元的八木定向天線，其增益可達10~15dB?；景鍫钐炀€基站板狀天線是用得**為遍及且極為重要的基站天線，歸于定向天線的一種。這種天線的長處是：增益高、扇形區(qū)方向圖好、后瓣小、垂直面方向圖俯角操控便利、密封功能牢靠以及運用壽命長。其選型和設置相對雜亂，依據(jù)掩蓋要求、話務量散布、抗干擾要求等，需嚴厲的調(diào)整下傾角、方向角、天線掛高、天線分集間隔和阻隔間隔等參數(shù)。慣例的基站板狀天線，其增益約為14~17dB，加長型基站板狀天線，其增益可達16~19dB，顯而易見，加長型的長度，為慣例板狀天線的一倍，達m左右。高增益拋物面天線由于拋物面具有杰出的聚焦效果，所以拋物面天線集射才能強，直徑為m的拋物面天線，其增益即可達20dB。雷達在發(fā)射時須把能量會集輻射到需求照耀的方向。廣州玻璃鋼天線</p><p style="text-indent:25px">泉州市天陸通信科技有限公司致力于通信產(chǎn)品，是一家生產(chǎn)型公司。公司業(yè)務涵蓋玻璃鋼天線，車載天線，船舶天線，對講機天線等，價格合理，品質有保證。公司注重以質量為中心，以服務為理念，秉持誠信為本的理念，打造通信產(chǎn)品良好品牌。在社會各界的鼎力支持下，持續(xù)創(chuàng)新，不斷鑄造***服務體驗，為客戶成功提供堅實有力的支持。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2157415.html</p></div></div></div></div></div><div id="n7bifwi" class="page-right 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