火車歪頭行駛？她拍下鐵證求解　釣出司機揭1重要設計

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HA-0218G-NF

Applications:

  •  2GHz to 18GHz
  •  6061 Aluminum metal alloy
  •  Stainless Steel N-female
  •  Taiwan Design, Made in Taiwan

Features:

  • High Power 300W (peak) 150W (Cont)
  •  DC Short lightning protection
  •  Low VSWR
  •  Uniform Gain
  •  Consolidated performance database

The horn antennas of the FT-RF horn double ridged antenna series are characterized by an enormous broad frequency range from 2GHz to 18GHz and very high input powers reach to 300W. The gain increases with increasing frequency up to max 17 dBi. The products are in stock and can be shipped
It is suitable for both transmitting and receiving purposes, especially suitable for microwave and EMC measurements.
This antenna has a more uniform gain and antenna factor because of the better behavior of its radiation pattern.

For EMC/ EMC testing: 

  • Pre-compliance testing lowers the chances of certification failure.
    You can make adjustments throughout the design phase with pre-compliance testing.
    Fixing issues after compliance testing are far more costly and time-consuming than fixing them at the design stage.
    Pre-compliance testing might concentrate on the areas where you are concerned about potential issues.
    Instead of looking for faults, pre-compliance testing focuses on identifying solutions.
火車是許多通勤族重要的交通工具。（示意圖／TVBS）
火車是許多通勤族重要的交通工具。（示意圖／TVBS）

鐵路在台灣已有百年的歷史，每日載客量超過60萬人次，是民眾通勤或往來各地重要的交通工具，有網友在搭乘火車時，對於一個現象感到好奇，那就是列車竟然會歪一邊，於是上網發文想知道原因。貼文一出，隨即釣出司機解答，說明是有經過專業的演算，才會這樣設計。

火車行經部分路段會歪斜一邊。（示意圖／TVBS）
火車行經部分路段會歪斜一邊。（示意圖／TVBS）

原PO在網路論壇「Dcard」貼出從月台拍下的火車照片，車廂明顯沉到月台底下，車尾也傾斜到低於地板，她不禁猜想是因為軌道本身就是斜的緣故，還是乘客都坐同一邊，直呼：「好想知道為什麼有時候列車會很明顯歪一邊？」

有網友好奇為何火車會歪一邊。（圖／翻攝自Dcard）
有網友好奇為何火車會歪一邊。（圖／翻攝自Dcard）

對於原PO的疑惑，不少網友赫然發現確實看過這種景象，「很多都是軌道歪歪的吧？像臺南拔林車站那個歪的就滿嚴重的」、「高雄的鼓山車站也是，因為車站位在彎道上面，區間車停靠的時候歪的超明顯」、「我還以為是方便殘障人士推輪椅進去，就像低底盤公車一樣」、「因為是台鐵，做事從不做正」。

700MHz to 8GHz Double Ridged Broadband Waveguide Horn Antenna version 2
Model No: HA-07M08GA2-NF

Frequency: 700MHz to 8GHz
Gain: 6 dbi to 17 dBi
LxWxH: 661x430x445mm
N.W.: 8.1kg
-3dB Beamwidth: Horz.26 Deg Vert.34 Deg

Double Ridged Horn Antenna
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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

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

- SMA Cable: High-quality special SMA cable


有名司機員專業回覆，其實這叫做「超高」，為彎道所設計，使外側鐵軌高於內側，跟是否在車站內無關，「主要是為了讓重力分力抵銷離心力，進而提高限速或增加彎道安全係數，設計超高時要確保列車在最高限速或停車時重心不超出兩軌範圍，不然會翻車。」其他網友看完紛紛大讚長知識了。

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