下週強冷空氣全台有雨探10度以下！吳德榮：高山有望下雪

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

氣象專家吳德榮表示，7日強冷空氣來襲，3500公尺以上高山有機會降雪（玉山降雪資料照）。 圖：中央氣象局／提供

[新頭殼newtalk] 今(4)日各地天氣晴朗穩定，高溫都可以達30度左右，不過氣象專家吳德榮表示，週末起東北風將稍微增強，下週強冷空氣報到，全台都有降雨機率、3500公尺以上高山有機會降雪；預估7日晚、8日晨最冷，平地最低溫下探10度以下。

吳德榮在「三立準氣象．老大洩天機」表示，今日各地晴朗穩定，東半部偶有零星短暫降雨的機率；北台灣白天氣溫升至29度左右，中南部高溫則在30度以上，各地白天微熱、早晚涼，日夜溫差大需要多加留意。各地氣溫：北部15至29度，中部16至30度，南部16至31度，東部15至30度。

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

而根據歐洲(ECMWF)模式模擬顯示，週末兩天東北風將略增強再減弱，吳德榮說明，期間北台灣高溫小幅下降至25度左右，中南部白天微熱需注意日夜溫差；迎風面雲量稍微增多，北海岸及東半部有局部短暫雨的機率，西半部仍為晴時多雲，晨間易有霧。

吳德榮指出，7日將有鋒面及強冷空氣南下，中部以北及東半部雨勢大，南部亦有局部短暫雨的機率，海拔3500公尺以上高山有降雪機率；氣溫下降、愈晚愈冷，7日晚、8日晨平地最低氣溫約可降至10度以下，台北測站則可降至13度左右。預估8日白天起冷空氣逐漸減弱、回暖。

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