WarDriving , Wi-Fi HowTo | Wi-Fi сети Краснодара | ||
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обновлено: 2.03.11 | Форумы : Wi-Fi | Вардрайвинг | Other |
Конструкция облучателя 2400 МГц offset от Bester.
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Тема форума
Облучатель для OFFSETки. Данная статья написана по этой теме форума. Особое внимание хочу
обратить на первоисточник
Облучатель 2400 МГц offset. Если при установке облучателя возникают вопросы, то
сначала необходимо посмотреть
Монтаж 2400 МГц offset. |
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Appearing questions on size offset head has commented
Igor Panchenko... Sizes (thickness of the material not critical 0,5-2 mm. central pin 3 mm. steel) : 1. The Active "pancake" diameter 68 mm. 11мм from reflector. Feeding 10 mm from edge. 2. First director diameter 54 mm. Distance from active 12 mm. 3. Second director diameter 38 mm. Distance from 1 director 32mm. 4. Third director and following 37 mm. Distance between them 28-32 mm. Under 28 mms more passband antenna. As from second director possible to put not "pancake", but dipol 2-5 mms long not more than 30 mm. Raised the reinforcement such wave channel before 20 db. But practical design is got not. The Problems to capsulation to designs. This photo of the reasonable variant. Than better offset head in such variant: 1.The High Efficiency. The Conducting surfaces greater on area. Possible use any material. Tried copper, brass, zinc-coated iron, on serial steel with covering tin-stibium. On features practically does not affect. 2. No element of the co-ordination and symmetry, on which sometimes be the greater losses, require the serious measuring equipment. The Antenna (offset head) by automaton is coordinated with asymmetrical cable. 3. No connecting additional cables in antenna, which wrong soldering can bring about big loss and compromising emanationses. 4. "Playing" reinforcement (increasing amount disk) possible qualitative to drive under any type offset. 5. The Huge broad band antenna for the other types. 6. As independent antenna, under small size has a high reinforcement, practically quite well works without adjusting, when withstanding the sizes. (High repeatability) But only under 3-5 element designs!!! Further - much in a complicated way, it is necessary to adjust on panaramic meter at assembly. The Reason many failure, repetitions in home condition wave channel. Arouse, "banks" and zigzag (BiQuad) will fly on garbage pit immediately. Serial offset head, little differs from photo above. On the grounds of is added ring, several weakens the side petal and small enlarges K.U. (0.5 db) |
Вопрос о поляризации антенны рассмотрен в этом документе, если не лень изучать. |
Эту же конструкцию антенны можно использовать как самостоятельную направленную,
пример Bester Direct Mini 2400.
Антенна имеет большое усиление (14 дБ) при минимальных габаритах, широкополосна. |
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