
飛易訊GSM吸盤天線!共享幸福人生!天線作為通信系統(tǒng)的重要組成部分,其性能的好壞直接影響通信系統(tǒng)的指標(biāo),用戶在選擇天線時****注重其性能。具體說有兩個方面,*一選擇天線類型;*二選擇天線的電氣性能。選擇天線類型的意義是:所選天線的方向圖是否符合系統(tǒng)設(shè)計中電波覆蓋的要求;選擇天線電氣性能的要求是:選擇天線的頻率帶寬、增益、額定功率等電氣指標(biāo)是否符合系統(tǒng)設(shè)計要求。因此,用戶在選擇天線時較好向廠家聯(lián)系咨詢。陳小姐
深圳市飛易訊通訊器材有限公司是**從事各種天線產(chǎn)品,如: 2.4G天線、3G天線、GPS天線、WIFI天線、車載天線、數(shù)字電視天線、3G網(wǎng)卡天線、DVB-T天線、吸盤天線、手機(jī)天線、路由器天線、八木天線、GSM天線、遙控玩具天線、通訊天線、天線連接器、射頻同軸連接器、射頻線等電子原器件產(chǎn)品的研發(fā)、生產(chǎn)及銷售的綜合型企業(yè)。公司于2006年三月成立于深圳市龍崗坪地鎮(zhèn)。注冊資金50W。公司已通過ISO9001:2008質(zhì)量管理體系認(rèn)證、ROHS環(huán)保認(rèn)證、3C及UL等認(rèn)證,目前公司擁有員工80人,工廠占地近1000m2。有**的生產(chǎn)檢測設(shè)備、網(wǎng)絡(luò)分析儀、頻譜儀、綜合儀、鹽霧測試儀等進(jìn)口檢測設(shè)備。公司有完善的生產(chǎn)、研發(fā)體系,產(chǎn)品銷售至全國三十多個城市,公司著眼于新的市場融合以及對新產(chǎn)品設(shè)計和生產(chǎn)工藝的*結(jié)合,致力于開發(fā)更新新穎、高性能的3G時代基站天線、直放天線/室內(nèi)分布天線、環(huán)境美化天線、30MHz~8GHz WLAN、WIFI/WIMAX等各系統(tǒng)小型化終端天線、寬頻微波器件及各類網(wǎng)絡(luò)線材。公司目前的主打產(chǎn)品是車載GPS天線、車載吸盤天線、八木天線、2.4G路由器膠棒天線及3G路由器膠桿天線,公司目前月產(chǎn)**在200K以上,目前在國內(nèi)**業(yè)綜合實力****。飛易訊有限公司一慣倡導(dǎo)執(zhí)行“科技**、品質(zhì)*一,價格合理、客戶至上”的經(jīng)營理念,在售服方面,致力于建立客戶暢通的聯(lián)系,確保為客戶提供**的服務(wù),**的我們將以更優(yōu)越的資源平臺向更多客戶提供**的產(chǎn)品、服務(wù)及技術(shù)支持,是您信賴的企業(yè)合作伙伴!Shenzhen fly yi communications equipment Co., LTD. Is specialized in all kinds of antenna products, such as: 2.4 G antenna, 3 G antenna GPS antenna, laptop, antenna, WIFI antenna, the antenna, digital TV antenna, the 3 G network card antenna, DVB-T antenna, disk antenna, chuck antenna, mobile phone, routers, antenna, GSM antenna, remote control toy antenna, communications antenna, antenna connectors, rf coaxial connectors, rf line and other electronic original device products development, production and sales of integrated enterprise. The company was founded in March 2006 in shenzhen longgang ping to town. The company has passed ISO9001:2008 quality management system certification, ROHS certification of environmental protection and 3 C authentication and UL, etc, at present, the company has 80 employees, the factory covers an area of nearly 1000 m2. Has the advanced production and testing equipment, network analyzer, spectrum analyzer, comprehensive instrument, salt fog tester and imported testing equipment. The company has a perfect production, research and development system, product sales to more than 30 city, the company focus on the new market integration of new product design and production technology and the comprehensive union, committed to the development of high performance update novel, 3 G base station antennas, straight times put antenna/interior distribution antenna, environment beautification antenna, 30 MHz ~ 8 GHz WLAN, WIFI/WIMAX and so on various system miniaturization terminal antenna, broadband microwave devices and all kinds of network wire. The present main products are on-board GPS antenna, the antenna, the ** amplifier suckers suction a top antennas and eight wooden antenna, 2.4 G router glue stick antennas and 3 G router glue bar antenna, the company currently in more than 200 K on production and sales and is currently in the domestic industry comprehensive strength is leading the way. Fly yi Co., LTD is always advocated the implementation of the \"science and technology innovation, quality first, price reasonable, customer first\" business philosophy, in sales services, committed to build customer smooth contacts, make sure to providing quality customer service, professional we will with more superior resources platform to more customers to provide quality products and services and technical support, is your reliable enterprise partner!
天線的輸入阻抗是以收發(fā)機(jī)與天線間的接口往天線端看入所得到的阻抗值。這一數(shù)值對天線的輻射效率,天線的帶內(nèi)增益波動,天線前端的功率容量有很大的影響。手機(jī)天線是一種駐波天線,天線的阻抗不匹配,將導(dǎo)致大量的信號反射,使天線的輻射效率降低,同時由于反射的影響使得天線在寬頻帶內(nèi)的增益有抖動,如果天線的駐波為6,手機(jī)前端的擊穿電壓將降為原來的1/6,而功率容量就會下降。手機(jī)天線駐波對天線效率的影響不可不慎。天線的駐波要求,我們目前統(tǒng)一要求為小于3。
工作頻率與工作帶寬
天線的帶寬是指滿足天線全部指標(biāo)的頻帶范圍。工作頻率是指天線帶寬范圍內(nèi)的所有頻率。工作帶寬由多個指標(biāo)來限定,因此需取其中帶寬較窄的帶寬,手機(jī)天線中,方向圖帶寬,較化帶寬等因素所限定的帶寬大于阻抗帶寬,因此在手機(jī)天線中一般以滿足所要求駐波的帶寬范圍作為天線的工作帶寬。
波束方向圖
天線波束方向圖是用來描述由天線所輻射出的能量與空間中任意位置的相互關(guān)系,藉由方向圖可以得知由天線所輻射的電磁波在空間中每一個位置的相對強(qiáng)度或**強(qiáng)度。毫無疑問,手機(jī)天線的水平方向圖要求是全向的,實際上手機(jī)天線的波束方向圖并不重要,主要是在手機(jī)的使用過程中,此時手機(jī)天線的輻射特性與單天線的輻射特性是不相同的。手機(jī)天線的方向圖只要求水平面近似為全向即可。
方向性與天線增益
天線的方向性與其波束方向圖有關(guān),所以方向性也是方位角的函數(shù),其定義如下:D(θ,ψ)=【天線在(θ,ψ)方向上的輻射強(qiáng)度】/【全向性天線的輻射強(qiáng)度】在實際的應(yīng)用上,由于**考慮天線本身的輻射效率問題,故通常都以天線增益的大小來代替指向性,兩者之間的關(guān)系為:
G(θ,ψ)=eD(θ,ψ)
其中,天線的輻射效率高低與電磁波輻射過程中所損失的能量多少有關(guān)。
天線在能量傳送與接收的過程中所有可能會產(chǎn)生的能量損失包括:天線輸入端阻抗不匹配造成的能量反射、天線本身的材質(zhì)在高頻下所產(chǎn)生的能量損耗以及在傳播介質(zhì)中所消耗的能量。手機(jī)天線的增益并不能代表手機(jī)使用時的效率問題:真正表示天線增益特性的指標(biāo)應(yīng)該是天線的平均有效增益,其與手機(jī)天線的的使用環(huán)境、使用方式、手機(jī)的結(jié)構(gòu)、手機(jī)設(shè)計方式相關(guān)。
GPS就是通過接受衛(wèi)星信號,進(jìn)行定位或者導(dǎo)航的終端。而接受信號就**用到天線。對于這些,打擊應(yīng)該不陌生吧 !或許對于GPS天線的分類不是很清楚,下面由小編為你講解一下:
⒈從較化方式上GPS天線分為垂直較化和圓形較化。
以現(xiàn)在的技術(shù),垂直較化的效果比不上圓形較化。因此除了特殊情況,GPS天線都會采用圓形較化和線性較化。
⒉從放置方式上GPS天線分為內(nèi)置天線和外置天線。
天線的裝配位置也是十分重要。早期GPS手持機(jī)多采用外翻式天線,此時天線與整機(jī)內(nèi)部基本隔離,EMI幾乎不對其造成影響,收星效果很好。現(xiàn)在隨著小型化潮流,GPS天線多采用內(nèi)置。此時天線**在所有金屬器件上方,殼內(nèi)須電鍍并良好接地,遠(yuǎn)離EMI干擾源,比如CPU,SDRAM,SD卡,晶振,DC/DC。
車載GPS的應(yīng)用會越來越普遍。而汽車的外殼,特別是汽車防爆膜會GPS信號產(chǎn)生嚴(yán)重的阻礙。一個帶磁鐵(能吸附到車頂)的外接天線對于車載GPS來說是非常有必要的。
3.從供電方面又分有源和無源。
外置式GPS為有源天線,比方達(dá)伽馬GPS天線外置式天線基本上就屬于有源天線。那無源天線就是不含LNA放大器,只是天線本體。
深圳市飛易訊通訊器材有限公司是**從事各種天線產(chǎn)品,如: 2.4G天線、3G天線、GPS天線、WIFI天線、車載天線、數(shù)字電視天線、3G網(wǎng)卡天線、DVB-T天線、吸盤天線、手機(jī)天線、路由器天線、八木天線、GSM天線、遙控玩具天線、通訊天線、天線連接器、射頻同軸連接器、射頻線等電子原器件產(chǎn)品的研發(fā)、生產(chǎn)及銷售的綜合型企業(yè)。公司于2006年三月成立于深圳市龍崗坪地鎮(zhèn)。注冊資金50W。 公司已通過ISO9001:2008質(zhì)量管理體系認(rèn)證、ROHS環(huán)保認(rèn)證、3C及UL等認(rèn)證,目前公司擁有員工80人,工廠占地近1000m2。有**的生產(chǎn)檢測設(shè)備、網(wǎng)絡(luò)分析儀、頻譜儀、綜合儀、鹽霧測試儀等進(jìn)口檢測設(shè)備。 公司有完善的生產(chǎn)、研發(fā)體系,產(chǎn)品銷售至全國三十多個城市,公司著眼于新的市場融合以及對新產(chǎn)品設(shè)計和生產(chǎn)工藝的*結(jié)合,致力于開發(fā)較新新穎、**的3G時代基站天線、直放天線/室內(nèi)分布天線、環(huán)境美化天線、30MHz~8GHz WLAN、WIFI/WIMAX等各系統(tǒng)小型化終端天線、寬頻微波器件及各類網(wǎng)絡(luò)線材。 公司目前的主打產(chǎn)品是車載GPS天線、車載吸盤天線、八木天線、2.4G路由器膠棒天線及3G路由器膠桿天線,公司目前月產(chǎn)**在200K以上,目前在國內(nèi)**業(yè)綜合實力****。 飛易訊有限公司一慣倡導(dǎo)執(zhí)行“科技**、品質(zhì)*一,價格合理、客戶至上”的經(jīng)營理念,在售服方面,致力于建立客戶暢通的聯(lián)系,確保為客戶提供**的服務(wù),**的我們將以較優(yōu)越的資源平臺向更多客戶提供**的產(chǎn)品、服務(wù)及技術(shù)支持,是您信賴的企業(yè)合作伙伴! Shenzhen fly yi communications equipment Co., LTD. Is specialized in all kinds of antenna products, such as: 2.4 G antenna, 3 G antenna GPS antenna, laptop, antenna, WIFI antenna, the antenna, digital TV antenna, the 3 G network card antenna, DVB-T antenna, disk antenna, chuck antenna, mobile phone, routers, antenna, GSM antenna, remote control toy antenna, communications antenna, antenna connectors, rf coaxial connectors, rf line and other electronic original device products development, production and sales of integrated enterprise. The company was founded in March 2006 in shenzhen longgang ping to town. The company has passed ISO9001:2008 quality management system certification, ROHS certification of environmental protection and 3 C authentication and UL, etc, at present, the company has 80 employees, the factory covers an area of nearly 1000 m2. Has the advanced production and testing equipment, network analyzer, spectrum analyzer, comprehensive instrument, salt fog tester and imported testing equipment. The company has a perfect production, research and development system, product sales to more than 30 city, the company focus on the new market integration of new product design and production technology and the comprehensive union, committed to the development of high performance update novel, 3 G base station antennas, straight times put antenna/interior distribution antenna, environment beautification antenna, 30 MHz ~ 8 GHz WLAN, WIFI/WIMAX and so on various system miniaturization terminal antenna, broadband microwave devices and all kinds of network wire. The present main products are on-board GPS antenna, the antenna, the ** amplifier suckers suction a top antennas and eight wooden antenna, 2.4 G router glue stick antennas and 3 G router glue bar antenna, the company currently in more than 200 K on production and sales and is currently in the domestic industry comprehensive strength is leading the way. Fly yi Co., LTD is always advocated the implementation of the \"science and technology innovation, quality first, price reasonable, customer first\" business philosophy, in sales services, committed to build customer smooth contacts, make sure to providing quality customer service, professional we will with more superior resources platform to more customers to provide quality products and services and technical support, is your reliable enterprise partner!