Standard Gain Horn Antenna
Standard gain horn antennas are used as calibration devices that measure the gain of other antennas.
These antennas are made up of a combination of a Waveguide to Coax Adapter and Standard Gain Horn with Waveguide Input. It is a kind of simple combination but with great care and attention to create an antenna with accurate and suitable specs.
FT-RF Standard gain horn antenna product series includes waveguide sizes WR28, WR42, WR51, WR62, WR75, WR90, WR112, WR137, WR159, WR187, WR229, WR284 and WR340, WR430, WR510, WR650, WR770, WR975, WR1150, WR1500, WR1800, WR2100, WR2300, with broadband waveguide horn antennas have frequency capabilities ranging from 320Mhz to 40 GHz depending on type and style. with the gain of 10dBi, 15dBi, 20dBi and 25dBi.
Standard Gain Horn Antenna Applications:
- - Antenna measurement
- - Radar Detection System
- - Wireless Communication
- - Spectrum Monitoring
- - Electromagnetic interference Testing (EMI test)
記者戴以柔/綜合報導
ABS好球帶挑戰系統正式上路。(圖/翻攝自X平台 @espn)大聯盟電子好球帶正式上路!新賽季各隊終於有權對主審的好壞球判決提出申訴,不過這個新賽制仍有不少限制,包括僅「投、捕、打」3人可以做出挑戰,若由教練團或隊友幫忙將會被駁回。
從2022年開始ABS好球帶挑戰系統先在小聯盟測試,去年首度在大聯盟春訓開箱,9月經過聯合競賽委員討論過後,確定批准通過,不過相較於直接全面改成電子好球帶,大聯盟想出折衷方案不用取代傳統由主審裁定的方式,ABS挑戰系統會精確定位每一球的位置,若球員認為主審的好壞球判決有誤可以提出挑戰,該球隨後會被放在球場大螢幕和轉播畫面上顯示圖像結果。Horn antenna
Horn antenna增設這套系統的用意是確保關鍵時刻能有準確的判決,預計每隊各有2次挑戰,延長賽若用完將會多有1次挑戰機會,不過值得注意的是只有選手可以對主審的好壞球判決提出挑戰,包括打者、投手、捕手在內,就連總教練都不能提出挑戰,且挑戰必須在主審做出判決後立即提出,不得由休息室的教練團或場上其他球員協助,如果主審認定球員提出挑戰的決定受到其他人干預,挑戰將被駁回。
Horn antenna文章出自: https://www.setn.com/News.aspx?NewsID=1794831
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