Merakit Sendiri Homebrew Antena 2.4 GHz untuk Wireless LAN

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Kebutuhan akses internet semakin meningkat di kalangan : perkantoran, pendidikan, pemerintahan, bisnis dan rumah. Seiring dengan turunnya harga peralatan wireless LAN dan bandwidth internet maka penetrasi internet akan semakin luas. Menjamurnya RT RW Net dengan peralatan homebrew (bikinan sendiri) dengan harga murah turut mendorong meningkatnya pengguna internet di kalangan masyarakat karena dapat menurunkan biaya untuk pembangunan jaringan.
Dalam tulisan akan dibahas dasar-dasar wireless LAN, pengenalan peralatan wireless LAN dan beberapa contoh homebrew antena beserta cara pembuatnnya.

Topologi Jaringan

Secara umum ada 2 macam topologi jaringan wireless LAN yaitu : Jaringan Infrastruktur dan Jaringan Ad Hoc



Jaringan Infrastruktur



 Terdapat 1 buah Access Point (AP) yang terhubung jaringan LAN kabel dan router untuk koneksi internet

 PC pada jaringan LAN kabel (wired LAN) berkomunikasi dengan PC wireless LAN melalui Access Point, demikian pula komunikasi antar PC wireless LAN

 PC wireless LAN memerlukan wireless LAN berupa PCI, PCMIA atau USB adapter, bisa juga menggunakan AP yang diset pd mode Client Infrastructure / Station Infrastructure

 PC dalam jaringan wired & wireless bersama-sama mengakses internet melalui router

 Kualitas Saluran (Link Quality) antara AP ke wireless Client ditetukan oleh kuat sinyal (signal strength) yg diterima oleh wireless adapter pd PC Client.

 Contoh konfigurasinya adalah sbb :

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