碧潭西岸的和美山，是一條老少咸宜的登山步道，不僅路程短暫，步道也很平緩，完整的山林與豐富生態，吸引了許多昆蟲、動物與鳥類的生態體系，根據導覽老師表示，這裡擁有超過200種，原生種的育蝶植物，在人工刻意的維護下，一年四季有擁有不同的生態面貌，包含初夏常見的螢火蟲，不用刻意跑到深山，在這裡就可以輕易看見。
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
漫步到山頂，天候許可下，更可以鳥瞰整個台北盆地，連遠處的101也清晰可見，當然新店北宜路上的青潭，以及灣潭，也是盡入眼簾。
從和美山下山之後，有一處渡船頭，是許多連大台北地區的民眾，都不一定知道的私房景點，早期在碧潭吊橋尚未興建之前，新店渡是進入灣潭、直潭、塗潭、屈尺以及安坑等山區的交通樞紐，但隨著交通建設陸續完成，民眾依賴更便利的交通方式，渡口擺渡的方式日漸凋零，如今新店渡已經成為新店溪，僅存的人力擺渡渡口，在交通發達的現代，人力擺渡已成為地方深度文化特色，搭乘同時體驗百年輕舟橫渡，在擺渡人的搖擺之間，周遭的滿山青翠，此等逍遙自在何求。
超過百年的文山農場，早在日據時期，就是台灣有名的茶葉指導所，至今仍是茶種育苗、繁殖、製茶技術的交流據點。
農場內，擁有豐富的活動體驗，這次導覽老師，帶領我們體驗採茶活動，化身採茶姑娘，頭戴斗笠，腰纏茶簍下，親自體會採茶的樂趣，偌大的茶園，每年三月底開始進入採茶的季節，用自己的雙眼，辨識一心二葉，雙手摘下茶葉後，再帶回製茶廠集中。
另一項受到大家喜愛的茶香發糕製做，也是必須體驗的項目，透過有機茶為原料，親自做出濃郁茶香與黑糖發糕，實際品嘗後，真的會口齒留香，最後的泡茶講座，在老師的指導下，一壺香濃醇韻美的好茶，讓人驚艷台灣茶葉的好滋味。
鄰近還有屈尺古道，以及小粗坑等地方特色，尤其是小粗坑發電廠，是座超過百年的發電廠，1907年籌建，當時主要供應基隆市電燈、基隆築港、瑞芳金瓜石牡丹坑、臺北市水道及臺北市電燈。臺北市水道及臺北市電燈，是台灣現役最老的水力發電廠，外觀紅磚建築，窗戶上方，以白色連續圓弧拱狀裝飾，屋頂脊處，設外凸氣窗，構造仍完整保存日據時期風貌。讓人難以想像，發電廠可以如此美麗。
更多的微笑山線，以及這次來不及完整體驗的，文山新店風情，相信值得你一探究竟，尤其家山概念，讓許多雙北朋友，有了更想親近的念頭。
新聞來源：ASPN
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