The horn antenna is a broadband passive device, shaped like a pyramid horn, referred to as a TEM antenna, which guides the beam of radio waves at a precise frequency. FT-RF Double Ridged Horn antennas have frequency capabilities ranging from 400MHz to 40GHz depending on type and style.

FT-RF can adjust the connector and increase the waterproof mechanism and can be combined with multiple antennas.

The antenna main body with the bracket using CNC precision manufacturing, and adopt a more weather resistant material aluminum material and the surface through the 6061 and 7071 Aluminum special handling to prevent oxidation.

FT-RF antennas are designing and manufacturing in Taiwan with an RF network analyzer and adjust the testing laboratory to ensure the stability and quality of our products.

With more than 15 years of experience in researching, developing, and manufacturing this line product. FT-RF Antennas are lightweight, easy to install, and design for a quick test, with an average gain and factor design and VSWR. They are suitable for RF chamber, antenna calibration, RF component testing, interference antenna, signal collection antenna, and characteristics of various RF designs. In addition, they have high power, low F/B, durability, and a three-year warranty.

Open Boundary Quad-ridged Horn Antenna's open boundary design is similar to two double-ridged waveguide antennas orthogonally to each other. 

FT-RF Open Boundary Quad-ridged Horn Antennas have frequency capabilities ranging from 700 MHz to 18GHz depending on type and style.
FT-RF antennas are designing and manufacturing in Taiwan with an RF network analyzer and adjust the testing laboratory to ensure the stability and quality of our products.

FT-RF standard gain horn antennas, also referred to as microwave horn antennas or simply gain horn antennas, are broadband passive devices shaped like a pyramidal horn design to direct a beam radio waves at a precise frequency. Standard gain horn antennas are also used as calibration devices that measure the gain of other antennas. The FT-RF standard gain horn antenna product line includes waveguide sizes WR2300 , WR2100 , WR1800 , WR1500 , WR770 ,WR975 ,WR650 ,WR510 , WR430 , WR340 , WR284 ,WR229 , WR28, WR34, WR42, WR51, WR62, WR75, WR90, WR102, WR112, . The waveguide portion of the standard gain horn is manufactured of aluminum.

Standard gain horn antennas fromFT-RF are ordered with a waveguide to coax adapter attached to it, known as a connectorized horn antenna. Our broadband waveguide horn antennas have frequency capabilities ranging from 380 GHz to 70 GHz depending on type and style. FT-RF standard gain horn antenna products come in 10 dB, 15 dB and 20 dB and 25dbi HS-Series models. Many of our RF and microwave gain horn antennas are RoHS and REACH and FCC and CE compliant.

Dual Polarization horn antenna

1．  手機天線的處理：

 

a,要盡早確定天線形式，是PIFA天線，還是monopole 天 線，螺旋天線，外置還是內置天線等。能盡量留多點空間給天線的就盡量多，面積越小的小天線效率越低，相應的帶寬也會窄一些，如果你追求高效率較寬的帶寬的 話，一定要多給天線一點空間。記住，天線是你怎麼對它它就怎麼對你，你給不給它留空間，它就不給你留空間，不給你留面子的。

 

b,盡量將天線的位置放在遠離噪聲源的地方，比如LDO側，電池座邊，攝像頭邊，LCD或攝像頭接插件邊等。能不把這些器件放在靠近天線的位置就盡量不要放，就是要放也要離開一定的距離，而且要用地隔離，但隔離還是有限，一般離天線10mm左右的攝像頭FPC會影響接收靈敏度1dB以上，影響TRP 0.5dB以上；而離天線10mm左右的LDO也會影響接收靈敏度1dB以上，影響TRP 0.5dB以上，有時甚至更多；speaker在天線附近和不在附近也會影響接收靈敏度1dB以上，如果是單極天線，不是淨空的話，天線性能會很差，我遇到過離天線架3mm的地方的地對天線接收靈敏度的影響超過2dB的。

 

c,從RF connector到天線饋點的布線，很多容易忽略這一點。天線饋點離地我建議最少要6 mm以上，當然更寬一點更好。而從RF connector到 天線饋點的信號線要包地處理，信號線離地邊緣最少要２倍線寬，這樣可以減小信號耦合和地上的串擾信號干擾；另外一點，就是這中間的匹配電路，一般人都是用 一個ＰＩ型電路進行匹配，我是一般用４個器件的，就是雙Ｌ型，這樣調試天線會快一些，因為對雙頻天線來說，我覺得很難用一個ＰＩ型能做到兩個頻段的諧振都 很好。多留一點調試余量，和節省一個電容之間的區別，自己權衡吧。

 

２．ASM的處理。

ASM就是1mhz to 70ghz any type antennaantenna switch module天 線開關模塊的意思。在ＧＳＭ系統中，由於是時分雙工加頻分雙工的制式，所以需要一個雙工器件進行信號分離。以前的ＧＳＭ手機採用的是介質雙工器的方法進行 信號分離，但介質雙工器體積太大，且只能進行單頻工作，已經被淘汰。目前用的比較多的是ＡＳＭ。ＡＳＭ是一個是數字信號控制收發時隙，以及進頻段選擇，體 積也比較小。但ＡＳＭ的收發隔離度是比較小的，好像只有３０dB左右，這樣就要接收的時候，PA要關掉信號發射，這樣PA不會有信號輸出從而影響接收。現在CDMA方案的手機就採用無源的雙工器，然後將PA信號關斷之後還要關斷PA電源，這是因為要防止PA的雜散信號或自激信號會影響接收。

現在一般的ASM使用的都是日系的一些廠家的，主要是HITTICH，Muruta,TDK等。他們一般都不會提供其ASM的端口S參數，但會給一些參考設計。而我們設計的PCB100mhz to 70ghz Dual Polarization horn antenna ,FT-RF can desgin ana made的寄生參數等還是會與他們的sample有區別的，建議自己用網絡分析儀測試一下各個端口的阻抗，仿真時匹配用。

測試阻抗時，要加電並用軟件控制選擇頻段，測試收端阻抗時，斷開從PA發射出來的信號（去掉鏈路中的匹配電路就是）。用豬尾巴做開口測試，記得務必要將豬尾巴進行校準，最終的結果是單端口連接豬尾巴時，阻抗顯示在開路點。

ASM的插入損耗對於接收鏈路來說非常重要，插入損耗過大的話會影響接收靈敏度；ASM  TX端的損耗過大的話，PA需要輸出更大功率才能滿足校準時的功率要求，這就人為的惡化了PA的性能，造成一些諸如開關譜FAIL之類的問題。

引用自: https://kelvin820.pixnet.net/blog/post/12794442FT-RF Hron antenna

引用自: http://blog.udn.com/9ab03bcd/169905974FT-RF Hron antenna

本篇文章引用自此: http://blog.udn.com/3153fa34/169918162