200MHz to 3GHz Double Ridged Broadband Waveguide Horn Antenna (Upgrade version of HA-02M03G-NF)

Frequency: 200MHz to 3GHz Gain: 3dbi to 12 dBi LxWxH: 986x960x720mm N.W.: 15 KG Connector: N-type Female - Max power: 600W Connector: 7/16-Female - Max power: 3000W (The connector can be adjusted by customer needs)

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 antenna main body with the bracket using CNC precision manufacturing, and adopt a more weather resistant material aluminum material and the surface through the 6061 and 7071 Aluminum special handling to prevent oxidation.

The horn is suitable for both transmitting and receiving purposes. the product is 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

新奇中心／綜合報導

▲古代太監在民間被稱為老公。（圖／翻攝微博）

現今社會中，許多夫妻會以「老公、老婆」來互相稱呼，以表示對對方的親密。不過這2個稱謂的由來又是為何？原來早在古代就有這個稱謂，只是在當時並非對另一半的稱呼，反而是在稱「這些人」！

在中國明、清時期，宮中宦官、太監通常都被稱為為寺人、黃門、貂璫，卑稱內豎、閹宦、太監、閹人，不過在民間社會中則俗稱為「老公」。還有1種說法，由於太監也喜歡逛妓院，但始終無法圓滿了事，因此這些太監都很喜歡折磨妓女，久而久之妓女都很害怕、討厭碰上太監，私下裡叫他們「老公」，其實就是對太監的一種蔑視辱罵。

據《棗林雜俎》中記載，李自成進京後驅逐太監並呼喊「打逐老公」，而其中這「打老公」中的老公就是指太監。由於明朝時宮裡的太監時常仗勢欺人，萬曆年間出現「礦監稅使」欺壓百姓，造成了人民的反抗，所以常常有「打老公」的事發生。而《紅樓夢》中也寫道，「門上的人領了老公進來」，這文中的老公也是指宮中太監的意思。

▲古代妓女對太監相當種蔑視。（圖／翻攝自百度百科）