We recently launched the HA-02M03G01-NF, which is considered an upgrade version of HA-02M03G-NF with attributing to the persistent research of FT-RF CEO - Mr. Chen and RD team. This becomes one of the largest designs in the line of Double Ridged Antennas, despite the fact that the product weighs only 15kg. 

This product's specifications are listed below. With a frequency range of 200 MHz to 3 GHz, it was tested at 3 different distances: 1M, 3M, and 10M.

台北市智慧公車站牌林立街頭，方便民眾即時掌握候車時間，但有議員發現，智慧站牌故障頻繁，6年來報修3460件、累積維修費達3774萬元，去年故障報修件數竟暴增至1956件，智慧站牌宛如「花燈」。對此，北市公共運輸處允諾，設備老舊的站牌將於年底完成汰換。

近年北市推動傳統公車站牌轉型，截至今年4月底，全市3343處公車站中，智慧型站牌總數就有2858座，其中附掛式1753座、獨立式638座、太陽能467座。

市議員王浩質疑，智慧站牌1年故障報修次數約在百件上下，去年卻暴增至1956件，平均每天就有至少5處無法正常運作，不少民眾也抱怨站牌偶有全黑、出現雜訊狀況。

近7年報修次數最頻繁的前5大站牌，分別為泰北中學站東側58次、士林官邸站西側26次、西湖圖書館湖光教會站東側20次、師大分部站南側20次，以及仁愛新生路口站南側19次。

王浩質疑，附掛式智慧站牌設備故障率高，2015年至2021年間，平均每座站牌報修次數達1.64次，高於獨立式和太陽能智慧站牌一倍以上，可能出在公車亭設有廣告燈箱、電子看板等附屬設施，由於設備須共用電力，一旦供電不穩或電力超出負載，就可能損壞。

北市公運處智慧運輸科長張耿禎解釋，去年報修次數多，主因是納入後端系統自動偵測異常通知，目的是加強維護品質，提早發現站牌異常狀況，過去報修主要是靠1999反映，去年案件數才會比過去高，若以智慧站牌故障天數占其總運作天數計算，妥善率均達99.34％以上。

Double Ridged Horn Antenna
Sort by:Select
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

- Antenna Tripod: easy and fast-changing polarisation. 100% stable handling

- SMA Cable: High-quality special SMA cable

張耿禎說，針對故障報修次數最多的站位，2站原為舊式獨立式站牌，2017年更換為附掛式站牌後，均已無報修故障情形；另外3站故障原因則為通訊不穩定、設備老舊及電源不穩。

張耿禎表示，審視去年報修次數較高站位後，發現主因是早期、2015年建置的智慧型站牌，因設備長年日曬雨淋導致組件老化，將規畫於今年底前完成汰換；今年下半年也將把設在候車亭內，與智慧型站牌共用電源的面板設備拆除，避免共用電力。