Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
太空太陽能的意識圖，太陽能發電工廠建立在太空，然後以微波的方式將電力傳回，微波比較不會受到雲霧灰塵的影響。(圖/NASA)
Log Periodic Antenna (LPDA)
Log Periodic Antenna (LPDA)
本文來自: https://www.chinatimes.com/realtimenews/20241111004953-260408
The Log Periodic Antenna as known as LPDA is a wideband directional antenna that provides gain and directivity combined over a wide band of frequencies.
Both Log-Periodic Antennas and Yagi antennas are high gain directional antennas. The main difference between these antennas is that Log-Periodic Antennas support wider frequency bandwidths and are physically much larger than Yagi antennas.
The log-periodic dipole array typical VSWR is 2:1 and operates over a much wider bandwidth and will have a lower gain for an equivalent number of elements.
With this level of performance, it is ideal for many applications, although a log-periodic antenna will be much larger than a Yagi of an equivalent gain.
英國冰島合作「太空太陽能」 預計2030年上線供電
英國新創公司「太空太陽能」( Space Solar)與冰島的雷克雅維克能源公司(Reykjavik Energy)簽署了一項協議，將共同研發將太空生產的太陽能電力，傳送到地面的計畫，示範規模30百萬瓦，計畫於2030年上線。冰島可能成為第一個接收來太空太陽能發電廠的電力的國家。
新阿特拉斯(New Altas)報導，太陽能是很受歡迎的清潔電力，但它也存在許多根本性問題。其中最重要的一點是，太陽有每天都會下山的「壞習慣」，另外還有惡劣天氣，也無法看到太陽。
自 1970 年代以來，科學家提出一種克服地面太陽能缺點的想法，那就是將太陽能發電站部署在地球同步軌道，也就是離地表35786公里處的太空，那裡也稱靜止軌道，設於此處的太陽發電站，將24小時環繞地球一周，也就相當於固定在地球上空的一個地點。太空有連續的陽光，不被空氣、雲或灰塵干擾。
本文來自: https://www.chinatimes.com/realtimenews/20241111004953-260408
The Log Periodic Antenna as known as LPDA is a wideband directional antenna that provides gain and directivity combined over a wide band of frequencies.
Both Log-Periodic Antennas and Yagi antennas are high gain directional antennas. The main difference between these antennas is that Log-Periodic Antennas support wider frequency bandwidths and are physically much larger than Yagi antennas.
The log-periodic dipole array typical VSWR is 2:1 and operates over a much wider bandwidth and will have a lower gain for an equivalent number of elements.
With this level of performance, it is ideal for many applications, although a log-periodic antenna will be much larger than a Yagi of an equivalent gain.
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