jonesqne2

2022-03-07 02:01:33jonesqne2

俄烏開戰挪威鮭魚漲一倍爭鮮海壽司停售鮭魚生魚片

留言 0 收藏 0 推薦 0

俄烏開戰，從挪威運來台灣的鮭魚班機銳減，運費又攀升，連鎖迴轉壽司品牌業者開出第一槍，宣布鮭魚生魚片暫停販售，其他鮭魚品項則限量供應，實際詢問其他連鎖品牌，海壽司鮭魚生魚片從3/4起停售，藏壽司及壽司郎本就沒有鮭魚商品，也暫無漲價計畫。

Sort by:Select
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.
In terms of its specification, a typical log periodic antenna might provide between 3 and 6 dB gain over dipole for a bandwidth of 2:1 while retaining a VSWR level of better than 1.3:1. 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.

EMC/EMI pre-compliance test antenna.
Very high gain over the full frequency range.
Meets latest EMC standards up to 7GHz.
Suitable even for immunity measurements

引用自: https://tw.news.yahoo.com/%E4%BF%84%E7%83%8F%E9%96%8B%E6%88%B0%E6%8C%AA%E5%A8%81%E9%AE%AD%E9%AD%9A%E