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tcPro"><section class="home-main container clearfix"><div id="mtf3uqz" class="twoCol"><div id="7hdu3ul" 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>?佛山4G天線歡迎來電泉州市天陸通信科技供應(yīng)</p><div id="swnektz" class="leftbox clearfix"><h1>佛山4G天線歡迎來電泉州市天陸通信科技供應(yīng)</h1><div id="qplxofm" class="proBig"><div id="h8e8fw7" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422046903737_qztl_4891799.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="rm22oz3" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422046903737_qztl_4891799.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="b7tn2ct" 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>佛山4G天線</p><p><span>***更新：</span>2020-06-22 14:23:27</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="fm4i9rs" 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 </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="apy33tk" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="e832ghy" class="box"><p><p> GPS系統(tǒng)在我們的生活中應(yīng)用越來越廣，這離不開GPS天線的重要作用，下面GPS天線廠家來告訴您GPS天線的具體作用吧。1.是用來撲捉衛(wèi)星，接收衛(wèi)星定位信息的，也就是輻射和接收電磁波。任何高頻電路，只要不是完全屏蔽起來的，都可以向周圍空間或多或少地輻射電磁波，或者從周圍空間或多或少地接收到電磁波。根據(jù)GPS天線的不同，可以分為平板天線和螺旋天線，螺旋天線搜星能力更強(qiáng)一些。2，佛山4G天線.將衛(wèi)星傳來的無線電信號的電磁波能量變換成接收機(jī)電子器件可攝取應(yīng)用的電流，也就是能量轉(zhuǎn)換。通常對于**設(shè)備或車載設(shè)備而言，由于設(shè)備與GPS接收模塊之前往往有一定距離，因此在現(xiàn)實(shí)環(huán)境中可能會使用超過1米的潰線。但又因?yàn)轲伨€對信號有不少的損耗，所以在這種情況下只能選擇有源GPS天線。GPS天線的大小和形狀十分重要，因?yàn)檫@些特征決定了天線能獲取微弱的GPS信號的能力。GPS衛(wèi)星信號分為L1和L2，頻率分別為，其中L1為開放的民用信號，信號為圓形極化。信號強(qiáng)度為-166DBM左右，佛山4G天線，屬于比較弱的信號，佛山4G天線。根據(jù)需要，天線可設(shè)計(jì)成可以工作在單一的L1頻率上，也可以工作在L1和L2兩個頻率上。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="佛山4G天線" src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422046903737_qztl_4891799.jpg"></div><p> 車載天線是指設(shè)計(jì)安裝在車輛上的移動通訊天線，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)臺場合常常用吸盤天線代替基地臺天線。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(jià)格比較便宜，因此得到廣的使用。在作為臨時(shí)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。由于吸盤天線是根據(jù)汽車使用環(huán)境而設(shè)計(jì)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="佛山4G天線" src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422045340797_qztl_8940554.jpg"></div><p> 影響WIFI天線的效果的有哪些？按結(jié)構(gòu)方式和作業(yè)原理可分為線天線和面天線等。描繪天線的特性參量有方向圖、方向性系數(shù)、增益、輸入阻抗、輻射效率、極化和頻天線按維數(shù)來分能夠分成兩種類型：①按作業(yè)性質(zhì)可分為發(fā)射天線和接收天線。②按用處可分為通訊天線、廣播天線、電視天線、雷達(dá)天線等。③按作業(yè)波長可分為超長波天線、長波天線、中波天線、短波天線、超短波天線、微波天線等。④按結(jié)構(gòu)方式和作業(yè)原理可分為線天線和面天線等。描繪天線的特性參量有方向圖、方向性系數(shù)、增益、輸入阻抗、輻射效率、極化和頻天線按維數(shù)來分能夠分成兩種類型：一維天線由許多電線組成，這些電線或許像手機(jī)上用到的直線，或許是一些靈活的形狀，就像出現(xiàn)電纜之前在電視機(jī)上使用的老兔子耳朵。單極和雙級天線是兩種**基本的一維天線。二維天線改變多樣，有片狀（一塊正方形金屬）、陣列狀（組織好的二維方式的一束片），還有喇叭狀，碟狀。天線根據(jù)使用場合的不同能夠分為：手持臺天線、車載天線、基地天線三大類。手持臺天線便是個人使用手持對講機(jī)的天線，常見的有橡膠天線和拉桿天線兩大類。車載天線是指原設(shè)計(jì)安裝在車輛上通訊天線，**常見使用**普遍的是吸盤天線。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/350756.html</p></div></div></div></div></div><div id="xm9bzfw" class="page-right twoColRt"><div id="fendzqm" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="ajsfok8" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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