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id="lkht232" class="proBig"><div id="e2uo9zb" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422094453986_qztl_2203183.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="n9a3rt3" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422094453986_qztl_2203183.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="2u3tvc3" 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>鶴壁基站天線,天線</p><p><span>***更新：</span>2020-09-05 07:03:04</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="r97f87p" 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="tu2tlsz" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="fzw2b8f" class="box"><p><p> 四、GPS天線的性能影響GPS天線性能的主要是以下幾個(gè)方面：1、陶瓷片：陶瓷粉末的好壞以及燒結(jié)工藝直接影響它的性能?，F(xiàn)市面使用的陶瓷片主要是25×25、18×18、15×15、12×12。陶瓷片面積越大，介電常數(shù)越大，其共振頻率越高，接受效果越好。陶瓷片大多是正方形設(shè)計(jì)，是為了保證在XY方向上共振基本一致，從而達(dá)到均勻收星的效果。2、銀層：陶瓷天線表面銀層可以影響天線共振頻率。理想的GPS陶瓷片頻點(diǎn)準(zhǔn)確落在，鶴壁基站天線，但天線頻點(diǎn)非常容易受到周邊環(huán)境影響，特別是裝配在整機(jī)內(nèi)，必須通過(guò)調(diào)整銀面涂層外形，來(lái)調(diào)節(jié)頻點(diǎn)重新保持在，鶴壁基站天線。因此GPS整機(jī)廠家在采購(gòu)天線時(shí)一定要配合天線廠家，提供整機(jī)樣品進(jìn)行測(cè)試。3、饋點(diǎn)：陶瓷天線通過(guò)饋點(diǎn)收集共振信號(hào)并發(fā)送至后端。由于天線阻抗匹配的原因，饋點(diǎn)一般不是在天線的正**，而是在XY方向上做微小調(diào)整。這樣的阻抗匹配方法簡(jiǎn)單而且沒有增加成本。*在單軸方向上移動(dòng)稱為單偏天線，在兩軸均做移動(dòng)稱為雙偏，鶴壁基站天線。4、放大電路：承載陶瓷天線的PCB形狀及面積。由于GPS有觸地反彈的特性，當(dāng)背景是7cm×7cm無(wú)間斷大地時(shí)，patch天線的效能可以發(fā)揮到。雖然受外觀結(jié)構(gòu)等因素制約，但盡量保持相當(dāng)?shù)拿娣e且形狀均勻。天線就是把設(shè)備傳輸?shù)碾娦盘?hào)轉(zhuǎn)換為電磁波傳送。鶴壁基站天線</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="鶴壁基站天線,天線" src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422094453986_qztl_2203183.jpg"></div><p> 4G天線主要是由什么組成天線是一種轉(zhuǎn)換器，它把傳輸線上傳達(dá)的導(dǎo)行波，轉(zhuǎn)換成在無(wú)界前語(yǔ)（通常是自由空間）中傳達(dá)的電磁波，或許進(jìn)行相反的轉(zhuǎn)換。在無(wú)線電設(shè)備中用來(lái)發(fā)射或接收電磁波的部件。無(wú)線電通信、廣播、電視、雷達(dá)、導(dǎo)航、電子對(duì)抗、遙感、射電地輿等工程體系，但凡運(yùn)用電磁波來(lái)傳遞信息的，都依靠天線來(lái)進(jìn)行作業(yè)。此外，在用電磁波傳送能量方面，非信號(hào)的能量輻射也需要天線。一般天線都具有可逆性，即同一副天線既可用作發(fā)射天線，也可用作接收天線。同24小時(shí)線作為發(fā)射或接收的根本特性參數(shù)是相同的。這便是天線的互易定理。天線測(cè)量中被測(cè)天線的作業(yè)情況可所以發(fā)射情況，也可所以接收情況。這可根據(jù)測(cè)量的內(nèi)容，測(cè)量的設(shè)備、場(chǎng)所條件等因素靈敏選擇。由天線互易原理得知，兩種作業(yè)情況測(cè)量該天線參數(shù)的結(jié)果應(yīng)該是一起的。然而在實(shí)踐測(cè)量中，互易原理有必要在一定條件下才干運(yùn)用。（1）天線有必要是線性的、無(wú)源的，如衛(wèi)星電視接收天線，其饋源與高頻頭（LNB）為一體化的，不能用作發(fā)射。（2）收發(fā)體系阻抗匹配要杰出。盡管待測(cè)天線和源天線之間存在多次反射，但由于自由空間傳達(dá)的衰減，這種影響并不嚴(yán)峻。源天線、饋線、信號(hào)源以及待測(cè)天線、饋線及接收機(jī)。漯河車載天線平板天線結(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="鶴壁基站天線,天線" src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422046903737_qztl_4891799.jpg"></div><p> 智能WiFi天線怎樣改進(jìn)無(wú)線網(wǎng)絡(luò)性能？企業(yè)的辦公場(chǎng)所是一個(gè)繁忙而經(jīng)常變化的環(huán)境，跟著職工的移動(dòng)，Wi-Fi信號(hào)可能被障礙物遮擋。另外，WiFi信號(hào)還可能被周圍其它WiFi網(wǎng)絡(luò)信號(hào)或許職工的藍(lán)牙設(shè)備所攪擾，而平板電腦、筆記本、智能手機(jī)和其它WiFi設(shè)備在進(jìn)入WiFi網(wǎng)絡(luò)范圍后的主動(dòng)連接動(dòng)作(就算這些設(shè)備并不需要真正運(yùn)用Wi-Fi網(wǎng)絡(luò))，也會(huì)影響整個(gè)網(wǎng)絡(luò)的功能體驗(yàn)。這一切攪擾的成果就是Wi-Fi網(wǎng)絡(luò)丟包嚴(yán)峻，導(dǎo)致無(wú)線設(shè)備有必要重新發(fā)送數(shù)據(jù)，而這又導(dǎo)致網(wǎng)絡(luò)進(jìn)一步擁擠。因?yàn)椴簧僖苿?dòng)設(shè)備的Wi-Fi天線功能都不夠強(qiáng)，因此經(jīng)常會(huì)選用一種較低的數(shù)據(jù)傳輸速率與接入點(diǎn)保持連接，企圖**小化丟包狀況。帶寬越大，問(wèn)題越多因?yàn)榫W(wǎng)絡(luò)功能不良，并不是由帶寬缺乏引發(fā)的，因此一味加大網(wǎng)絡(luò)帶寬，并不能改善Wi-Fi網(wǎng)絡(luò)功能體驗(yàn)欠安的狀況。而添加接入點(diǎn)也會(huì)讓狀況更糟糕，因?yàn)楦嗟慕尤朦c(diǎn)會(huì)形成更多的抵觸并讓無(wú)線終端設(shè)備感到困惑，不知道該與哪個(gè)接入點(diǎn)連接。其中一種解決方案是運(yùn)用智能Wi-Fi設(shè)備接入點(diǎn)，同時(shí)運(yùn)用特殊軟件支持的網(wǎng)絡(luò)硬件設(shè)備或針對(duì)繁忙網(wǎng)絡(luò)環(huán)境優(yōu)化過(guò)的網(wǎng)絡(luò)設(shè)備。</p><p> 天線的作用與地位 </p> <p> 無(wú)線電發(fā)射機(jī)輸出的射頻信號(hào)功率，通過(guò)饋線（電纜）輸送到天線，由天線以電磁波形式輻射出去。電磁波到達(dá)接收地點(diǎn)后，由天線接下來(lái)（**接收很小很小一部分功率），并通過(guò)饋線送到無(wú)線電接收機(jī)?？梢?，天線是發(fā)射和接收電磁波的一個(gè)重要的無(wú)線電設(shè)備，沒有天線也就沒有無(wú)線電通信。天線品種繁多，以供不同頻率、不同用途、不同場(chǎng)合、不同要求等不同情況下使用。對(duì)于眾多品種的天線，進(jìn)行適當(dāng)?shù)姆诸愂潜匾模喊从猛痉诸?，可分為通信天線、電視天線、雷達(dá)天線等；按工作頻段分類，可分為短波天線、超短波天線、微波天線等；按方向性分類，可分為全向天線、定向天線等；按外形分類，可分為線狀天線、面狀天線等；等等分類。增益是指：在輸入功率持平的條件下，實(shí)際天線與志向的輻射單元在空間同一點(diǎn)場(chǎng)所發(fā)生的信號(hào)的功率密度之比。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="鶴壁基站天線,天線" src="http://tyunfile.71360.com/UpLoadFile/2019/11/27/9/637104422109499481_qztl_2724093.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(shí)候，順便把天線擦拭一下。把汽車天線核拉出來(lái)，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(jié)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(shí)候甚至只有一點(diǎn)銹也會(huì)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(jī)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(gè)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(lái)，保護(hù)乘員安全和汽車電路。一根小小的汽車天線，同時(shí)具備了數(shù)字廣播、移動(dòng)電視、GPS導(dǎo)航和語(yǔ)言識(shí)別等多種功能，用于接收和加強(qiáng)收音信號(hào),目前的我國(guó)大部分地區(qū)信號(hào)多很弱,汽車還需外置天線,在信號(hào)不穩(wěn)定的地區(qū)有很大的幫助。天線不可放在室內(nèi)使用，同時(shí)也造成高駐波。還有害人體。鶴壁基站天線</p><p style="text-indent:25px">移動(dòng)通信常用的基站天線、直放站天線與室內(nèi)天線。鶴壁基站天線</p><p> 多頻天線是汽車用戶對(duì)移動(dòng)通話質(zhì)量及行駛安全要求的發(fā)展而衍生的,它可以將,，例如:平板計(jì)算機(jī)、智能型手機(jī)、汽車導(dǎo)航機(jī)等等GPS功能和dualbandWiFi/Bluetooth功能同時(shí)需要時(shí)多頻天線的特性微型化的多頻芯片天線具有獨(dú)特的頻率調(diào)整組件設(shè)計(jì)，可輕易的調(diào)整共振頻率具有優(yōu)良的隔離度在不同頻段間(例如:GPS和WiFi頻段)當(dāng)溫度改變時(shí)，具有低的頻率變化值厚度薄、重量輕(9mg)符合RoHS與無(wú)鹵規(guī)范適用于SMT制程**的設(shè)計(jì)與獨(dú)有的制造流程。鶴壁基站天線</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，以科技創(chuàng)新實(shí)現(xiàn)***管理的追求。公司自創(chuàng)立以來(lái)，投身于玻璃鋼天線，車載天線，船舶天線，對(duì)講機(jī)天線，是通信產(chǎn)品的主力軍。泉州市天陸通信不斷開拓創(chuàng)新，追求出色，以技術(shù)為先導(dǎo)，以產(chǎn)品為平臺(tái)，以應(yīng)用為重點(diǎn)，以服務(wù)為保證，不斷為客戶創(chuàng)造更高價(jià)值，提供更優(yōu)服務(wù)。泉州市天陸通信始終關(guān)注自身，在風(fēng)云變化的時(shí)代，對(duì)自身的建設(shè)毫不懈怠，高度的專注與執(zhí)著使泉州市天陸通信在行業(yè)的從容而自信。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/1162407.html</p></div></div></div></div></div><div id="2fhzizb" class="page-right twoColRt"><div id="odkmgiz" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div 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