30 MHz to 512 MHz Military Handheld & Manpack Whip Antenna

FT-RF specializes in producing:

• Military Antennas (Jammer Antenna, Military Horn antenna, Military vehicle antenna, Antenna Telescope Mast, Marine, Panel, Log Periodic antenna, Gooseneck, Whip, GPS, Connector, Adapter...) Please visit the website: https://military.ft-rf.com.tw/
• Outdoor Antenna and Indoor Antenna: Including Lora Antenna, ISM, LPWA antenna (868MHz antenna aka EU868, 915MHz antenna aka US915, 923MHz antenna aka AS923 and others.), 4G LTE antenna, 5G antenna, Wifi Antenna, Multi-Frequency Antenna, UHF antenna..., RF components, Cables and Connectors. We offer a variety of high-performance antennas for Global LoRaWAN applications, including 868 MHz, 915 MHz, 868 MHz, and 923 MHz... Our product line comprises both durable outdoor antennas and indoor high-performance dipole antennas that are suitable for a variety of LoRa applications, including Helium Network support. Please visit the website here: https://ft-rf.com.tw/. 
• Horn Antenna: RF Microwave Antennas, EMC test equipment (Double Ridged Horn Antenna, Open boundary double ridged horn antenna, Quad Ridged Horn Antenna, Standard Gain Horn antenna, Waveguide to coax Adapter, precision Sleeve Dipole Antenna, Log Periodic Antenna, Antenna Tripod, RF connectors... Please visit the website: https://horn.ft-rf.com.tw/

We provide measurement and calibration Tests, ODM, OEM services for certain products.

We have hundreds of customers from over 60 countries, and to meet their demands, we developed a plant in Vietnam (with a total infrastructure area of 10000 square meters, which includes three major buildings dedicated to operations and production) in addition to the main manufacturing facility in Taiwan. Now, we are focusing on automatic production lines and investing in automation equipment. In the future, we pledge to deliver the highest-quality product in the shortest possible period.

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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. These series are characterized by a huge frequency range and extremely high input powers. With increasing frequency, the gain rises to a maximum of 18 dBi. At higher frequencies, the increased gain compensates for the increasing cable losses.

The advantages of Horn antenna:

- Wide bandwidth: Because the horn antenna has no resonant parts, it can function over a wide range of frequencies.

- Easy waveguide interface: These antennas are very easy to interface to waveguide due to their shape, but they can also be designed with a transition so that a regular coaxial feeder can be used.

- Easy to make, simple design.

The horn is suitable for both transmitting and receiving purposes, especially suitable for EMC and immunity test measurements.

Recommended Accessories

- 天線三腳架: easy and fast-changing polarisation. 100% stable handling

- SMA Cable: High-quality special SMA cable

現代人長期盯著手機、電腦等3C產品，導致眼睛經常會出現乾澀、疲勞的現象。對此，食藥署也表示「眼睛是靈魂之窗不可輕忽」，因此民眾若覺得視力模糊、或眼睛不適，則應儘速就醫診治；同時也介紹了眼壓檢測的方式及原理，提供大眾參考。

食藥署在「藥物食品安全週報」說明，眼壓是眼睛內的流體壓力，通常是透過房水的生成和排出以維持壓力平衡；此外青光眼是種會損害視神經、影響視力甚至恐導致失明的疾病，而此種損傷可能為眼睛異常高壓、壓迫視神經所引起，則「眼壓檢查」是青光眼診斷的重要依據之一。

食藥署表示，有關眼壓的檢測方式及原理，分為接觸式及非接觸式，而接觸式眼壓計又分為壓平式眼壓計及壓陷式眼壓計：

（1.）壓平式眼壓計：利用扁壓作用，以小扁平盤施壓於角膜，測出眼內張力。

（2.）壓陷式眼壓計：對眼球表面施以已知的壓力，從壓痕量得知眼內壓，壓痕深度與眼壓成反比。由於必須接觸，經常使用局部麻醉劑。

（3.）非接觸式眼壓計：透過噴射空氣壓平角膜，再透過儀器偵測角膜反射之光能量，進而算出眼內壓，設備和眼睛表面並無直接接觸。

最後食藥署也提醒，如有角膜水腫、潰傷、眼睛感染（如結膜炎）或穿透性傷口等情形，需要透過醫師診療來選擇最適當自己的檢測方式，如果有視力模糊、眼睛出現任何不適等，也要儘速就醫。

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