Standard Gain Horn Antenna
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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)
iPhone充電「上限80％」能救電池？低於1數字要直接換
iPhone 15系列機型中有「80%充電上限」功能，只要開啟該設定，當充電電量達到80%就會停止充電，藉此降低鋰電池的耗損，外媒MacRumors實測一年後發現，電池健康度確實更理想，但便利性卻下滑了。
MacRumors的編輯Juli Clover從2023年開始，將自己新買的iPhone 15 Pro Max設定充電上限80%，經過一年正常使用電池健康度維持94%，對比的兩位員工也是iPhone 15 Pro Max，但沒有設定充電上限，一位健康度下降至87%，另一位則有90%。
對此，Juli Clover提到，電池循環雖然比同事多，但獲得額外4%的電池健康度，顯示充電上限確實是有效的，但換造成生活上的不便，需要經常攜帶行動電源，避免手機沒電。
本文出自: https://www.chinatimes.com/realtimenews/20240928000011-260412
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