好市多破損折價超划算！網友勸別買
In broadcast engineering, a panel antenna is a directional antenna that is widely used to obtain a wireless Internet connection.
Directional antennas receive and broadcast a signal in only one direction, resulting in better signal quality.
Panel antennas, for example, are used in underdeveloped countries to improve the range and functionality of wireless Internet networks.
A panel antenna is shaped like a panel and is typically fixed on a mounting bracket on the exterior or inside of a building. It can also be mounted on a swivel mount, allowing the user to adjust the antenna for optimal signal reception. This type of antenna is usually one-directional, with less mobility side-to-side and up-and-down than an omnidirectional antenna, which can swivel and entirely change its location. Two U-bolt brackets and waterproof were supplied in one piece of packing
不少民眾喜歡購買即期品或福利品，因該類商品只有少許瑕疵，卻能以更加實惠的價格帶回家。就有位民眾逛好市多時發現，架上有賣「包裝破損」的奶粉，該品直接折價一百多元，她直呼太划算，可該文分享上網路後引得網友擔憂，認為「凹罐」的奶粉易產生變質，勸她不要因小失大，為省錢而賠上健康。
原PO於臉書社團《Costco好市多 商品經驗老實說》發文，表示自己驚奇地發現好市多也有「包裝破損」的折價方式，此牌奶粉原價一罐569元，而這兩罐有凹痕的一罐只要價450元，直接省下119元，原PO直呼「還滿划算的，如果是自己食用，內容物沒有影響，我覺得可以接受耶」。
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
但多數網友則苦勸原PO別買，說明罐頭類商品的包裝有瑕疵，很可能進一步汙染內容物，「別的用品還行，食品真的不要⋯遇過衛生紙少一包特價很多，還有玩具盒損，真的有划算」、「別為了省錢玩爛自己的健康吧」、「那可不一定，外觀變形，說不定濕氣已經跑進去」、「罐頭變形有的會生銹」、「很多罐頭都會警告你外觀變形不要買, 想想為什麼吧，別衝動」、「凹罐不要買，內容物易變質，嬰兒奶粉凹罐，開罐以後發現奶粉質地不好，顆粒變粗，有點潮濕會沾黏，不到半罐的量變成會結塊，這就是不能買凹罐的原因，外觀看起來只是變形，可裡面其實也跟著產生變化了」。
據《罐頭食品類衛生標準》第2條，對金屬罐裝食品有嚴格規定，外觀不得出現膨罐、污銹罐、彈性或急跳罐、嚴重凹罐之現象，並不得有切罐、斷封、尖銳捲緣、疑似捲封、捲緣不平、唇狀、舌狀、側封等可能引起漏罐危險之情形。（編輯：李惠婷）
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