FT-RF specializes in the production of jammer antennas, military antennas, RF/EMC/EMI antennas, RF Accessories, RF Microwave Antennas, and other microwave components. In addition, for certain product assessments, we can provide measurement and calibration services. 

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.

小弟目前研究方向為圓極化 有沒有圓極化達人可幫解答 為何場型要看半功率波束寬或是稱為3dB波束寬? 是一般系統定義功率需在一半以上嗎? 還有為何使用使它旋轉來量測~有其他方法嗎~鋸齒狀的場形該怎麼解釋 謝謝回答!! -- 與其為過去掉眼淚 不如期待未來的美好!

引用自: https://www.ptt.cc/bbs/comm_and_RF/M.1314200564.A.CE7.htmlcompany in Taiwan and Vietnam. The FT-RF main profession in R&D and manufacturing of antenna, be alongside of to be subjected to any OEM of nation and ODM, provide the product of the best quality and let the sale has the price of competition ability most , is the target that the FT-RF has been making great effort.FT-RF