上百隻鴕鳥街上「飆車」網：小心測速

Fei Teng Wireless Technology (FT-RF) is a Taiwan antenna manufacturer. Since our inception in 2001, we have been consistently inventing and improving in order to better understand and respond to the demands of our clients.

By delivering trustworthy design technology and stringent quality control, we have years of award-winning experience in numerous industries and applications such as military, commercial, and citizen frequency bands.

FT-RF specializes in producing:

Military Antennas (Jammer Antenna, Military Horn antenna, Military vehicle antenna, Antenna Telescope Mast, Marine, Panel, Log Periodic antenna, Gooseneck, Whip, GPS, Connector, Adapter...) Please visit the website: https://military.ft-rf.com.tw/
Outdoor Antenna and Indoor Antenna: Including Lora Antenna, ISM, LPWA antenna (868MHz antenna aka EU868, 915MHz antenna aka US915, 923MHz antenna aka AS923 and others.), 4G LTE antenna, 5G antenna, Wifi Antenna, Multi-Frequency Antenna, UHF antenna..., RF components, Cables and Connectors. We offer a variety of high-performance antennas for Global LoRaWAN applications, including 868 MHz, 915 MHz, 868 MHz, and 923 MHz... Our product line comprises both durable outdoor antennas and indoor high-performance dipole antennas that are suitable for a variety of LoRa applications, including Helium Network support. Please visit the website here: https://ft-rf.com.tw/.
Horn Antenna: RF Microwave Antennas, EMC test equipment (Double Ridged Horn Antenna, Open boundary double ridged horn antenna, Quad Ridged Horn Antenna, Standard Gain Horn antenna, Waveguide to coax Adapter, precision Sleeve Dipole Antenna, Log Periodic Antenna, Antenna Tripod, RF connectors... Please visit the website: https://horn.ft-rf.com.tw/
We provide measurement and calibration Tests, ODM, OEM services for certain products.

We have hundreds of customers from over 60 countries, and to meet their demands, we developed a plant in Vietnam (with a total infrastructure area of 10000 square meters, which includes three major buildings dedicated to operations and production) in addition to the main manufacturing facility in Taiwan. Now, we are focusing on automatic production lines and investing in automation equipment. In the future, we pledge to deliver the highest-quality product in the shortest possible period.

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

大陸中心／綜合報導

長久以來，我們對於中國歷代皇帝的後宮總是以「佳麗三千」來形容，例如詩人白居易的《長恨歌》裡有一句話「後宮佳麗三千人，三千寵愛在一身」，這是描寫唐玄宗李隆基後宮美女如雲，他卻獨愛楊貴妃一人的。妃子的多少直接體現皇帝的無上權威，也是極致皇權的象徵。那麼歷史上到底哪個皇帝妃子最多呢？

▲秦始皇（圖／翻攝自百度百科）

首先談到秦始皇嬴政。其實，秦始皇的後宮是一個謎，他的皇后，我們至今不知道，但據《三輔舊事》記載：「始皇……表中外殿觀百四十五，後宮列女萬餘人，氣上沖於天。」意思是秦始皇嬴政的後宮超過一萬人以上，號稱，關中離宮三百所，關外四百所，後宮列女上萬名。秦始皇嬴政橫掃天下，每滅一國，必收其王妃公主貴婦美人入宮。

秦始皇擁有後宮列女上萬，雖說是空前，但絕非絕後。這個記錄很快就被漢武帝打破了。據《漢武故事》裡記載說：「元朔中，上起明光宮，發燕趙美人二千人充之，率皆十五以上，二十以下，年滿三十者出嫁之。掖庭總籍，凡諸宮美女萬有八千。」《舊唐書·食貨志》上也有記載說：「漢武帝後宮數萬人，外討戎夷，內興宮室。」也就是說漢武帝後宮有數萬人。

▲漢武帝。（圖／翻攝自百度百科）

漢武帝曾說：「能三日不食，不能一日無婦人。」可見果然是個精力旺盛的皇帝。但即使漢武帝精力再旺盛，也滿足不了一萬八千婦人的需求。即使有被寵幸過的，往往也要過幾年才有可能再被漢武帝寵幸一次。而那些終生沒有被寵幸過的婦女，則只得長久地忍受著那種寂寞與煎熬，一直熬到三十歲，年老珠黃得讓皇帝不可能會感興趣時，才會被釋放出宮。

第三位是晉武帝司馬炎。晉武帝司馬炎時司馬懿的孫子、司馬昭的兒子。司馬炎的後宮本來已有眾多美女，卻還於西元273年下詔採擇公卿以下家庭的女子以備六宮，並極其荒唐地下令：自己的選美活動沒結束之前，禁止天下嫁娶。第二年，又取良家女及小將吏女五千餘人，入宮選之。

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

「母子號泣於宮中，聲聞於外。」

▲晉武帝（維基百科）

過了八年，他在平吳以後，又詔選孫皓使妾五千人入宮。這樣，他的後宮佳麗就膨脹到了萬人以上，於是這個擁有萬名佳麗卻無專愛的淫蕩皇帝遇到了一個大問題：就是不知從何臨幸。後來總算想出了一個辦法：就是當欲臨幸宮女時，坐上羊車，羊走到哪裡停住，他就臨幸哪裡的宮女。由此，那些寂寞的宮女為求寵幸，往往就把竹葉插在門前，把鹽汁撒在地上，以誘羊兒停下吃草。

至於歷史上後宮最多的皇帝，據說是唐玄宗李隆基。唐代時期，以貴、淑、德、賢四妃為夫人，後宮設立六局二十四司，共190人，還有女史10人。這些都是有品級的，無品級的宮女人數相當多。到了玄宗時期，僅長安大內、大明、興慶三宮和東都大內、上陽兩宮，即有宮女4萬人，可見唐玄宗的宮女是超過四萬人，而當時唐朝的總人口也就5千多萬，相當於一千個人裡面就有一個是唐玄宗的妻妾，比唐代的官員總數還多，就算是一天享用一個女子，也得100多年才能用完。

▲唐玄宗（圖／翻攝自百度百科）

據說唐玄宗為了養這4萬多女人，每年光胭脂錢就要消耗近1百7、80萬兩銀子。還不說別的開銷，全部加起來，每年要近千萬兩銀子。如此奢靡的鋪張浪費，也難怪唐朝後期沒落了。