〔焦點時報／記者郭政隆報導〕嘉義市大業國中3/14日舉行校園藝術「Adventure愛凡球」啟用典禮；愛凡球為大業國中師生與藝術家歐志成老師合作，以鯨魚象徵台灣，地球代表未來，象徵師生們乘風破浪，勇敢迎向世界，此一創作概念不僅具有新意，更凸顯校園美感教育之落實，透過裝置藝術的意象表徵讓學習情境更加優化，為校園導入創新課程，注入新的生命力，優化孩子們的學習環境，校園裡處處可以學習，透過學習品質的提升，幫助孩子立足嘉義市放眼國際，成為有素養的世界公民。

大業國中校長陳明君表示，「Adventure愛凡球」為大業師生攜手在地藝術家歐志成老師共同創作之作品，包含「鮭魚洄游」地景彩繪和「Adventure to the world」裝置藝術；美術老師在課堂上引導孩子設計發想，積極與歐老師對話，激盪出大業的火花，創作包含兩部分，一為「鮭魚洄游」，象徵大業國中人才濟濟，校友返校回饋母校，總共有16條魚，每一條魚皆為師生創作，代表的是一個國家的特色或是一件國際議題；二為「Adventure to the world」愛凡球裝置藝術，期許大業學生放眼世界，關心環境，展望未來。

HORN ANTENNA CALIBRATION

1.) The dual-polarization (HQ-Series or HR-Series) antenna has an electronic switch that may simultaneously test horizontal and vertical or +-45deg polarization, as well as a couple that can test circular polarization.
2.) The dual-polarized antenna (HQ-Series or HR-Series) is mounted on the chamber's bracket or wall (this is the way to test the antenna)
3.) If the dual-polarized antenna is being used for something else and calibration is needed, we can certainly assist.
4.)Single-polarized antennas (HA-Series, HB-Series, and other antennas) are commonly used to replace the antenna method's calibration antenna. When HA calibration is utilized, the calibration site is lost (patch loss uses a network analyzer) Enter the antenna's gain (minus the gain of the antenna, equal to the address of the object under test, return to zero)

5.) There is only one technique to compute antenna gain. The path loss patch loss subtracts the antenna's gain and substitutes the antenna under test to obtain the antenna's gain.
6.) Rotate the object under test after calculating the antenna route loss and gain calibration numbers (requires a rotating table, 2D test)
7.) If you want to read the horizontal and vertical antenna patterns at the same time with a dual-polarized antenna, an RF electronic switch, and a 3D rotating table, you can get the antenna pattern of the antenna (3D testing requires the use of HA-Series calibration twice, Horizontal and vertical or +-45deg),

8.) Antennas can be tested in a variety of methods (if you have any questions, you can provide simple photos or hand-drawn pictures, and we can assist you in the test plan)

9.) To ensure that the test value of the antenna is in compliance with international standards, all Horn products developed by FT-RF have passed internal calibration and testing in collaboration with external national research institutions, as well as third-party confirmation tests.

10.)In most ISO systems, we will demand external calibration of our test items every three years and internal self-calibration every other year. You can use the network with a set of HA-Series antennas. Calculate the path's loss using an analyzer (but usually at least three antennas can be used for internal correction, we can do internal correction by replacing the three antennas in turn)

11.)The antenna can be shipped back to Taiwan for calibration once every three years (you must know the shipping cost and the economic impact), or you can purchase a fresh set of calibrated antennas (we will calibrate the antenna internally).

11.)The antenna can be sent back to Taiwan for calibration once every three years (you must know the cost of shipping and the economic impact), or you can purchase a new set of calibrated antennas (we will calibrate the antenna internally or It is externally corrected and then sent to the customer)

12.) Antenna calibration is mostly done by an external calibration unit that must bear the ISO17025 and TAF logos.

13.)For the difference comparison test, you can use internally calibrated antennas, self-calibration, and ISO17025 antennas; this approach is frequently used in the ISO9001 series.

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

嘉義市長黃敏惠指出，愛凡球啟用讓我們覺得非常驚豔，精細的課程設計、跨領域學習，是藝術，也是科學，人文和科技相佐下，讓學習更精采，把校園藝術融入美學、環境永續發展概念，帶領他們省思，並找到學習的樂趣與熱情，今天孩子們畫的每條鮭魚都不一樣，也具有特殊意義，覺得孩子們表現非常優秀，每個孩子朝著夢想前進，並且踏踏實實、認真努力，這就是教育的本質。

鮭魚迴游中的荷蘭鮭魚係由葉恩圻與余蘊庭同學共同創作，以荷蘭國旗紅白藍創作，紅色代表大業國中金榜題名的榜單，藍色是期許大業學生具有遠航力，白色是喻意大業的學生能擁有一顆純真的心，鬱金香則是希望同學畢業後，都可以留下美好的回憶；另外，今天也是國際數學日，大業國中老師蔡宗岳特別COSPLAY愛因斯坦與市長、校長騎乘腳踏車發電，點亮LED，帶動機器人點亮彩色燈圈，展現科技教育及機器人程式教學的成效。