Project: Cantenna

[boyett]

---

Mga bai...

Tanang cantenna project diri na to i-post... gawas makakuha ang uban ug idea dako pa kaayo ang imong masave . Lata lang pwede na, mas layo ang maabot sa cantenna kaysa 15dBi omni.....



Daan nako nga cantenna..







Mag upgrade ko ani..hehehehe unsa kaha kalayo ang abton ani...




Kung gusto mo maghimo ug cantenna, kini akong gisundan nga toturial:

Waveguide Antenna 2.4 GHz for 802.11b (WiFi) WLAN

Thanks...

[jackdi]

Up ta ani Master Boyet!

If pwede, post ka og step by step procedure aron makat-on pod mo.
Thanks kaayo

[noliverh]

matsalams kaayo ani daan bro... ganahan au ko kat-on ani... mahal kaau ang antenna sa EnGenius oi... hehehe...

[noliverh]

This is what i've read about 802.11b or WI-FI from my cisco self study...

A key technology contained within the 802.11 standard is Direct Sequence Spread Spectrum (DSSS). DSSS applies to wireless devices operating within a 1 to 2 Mbps range. A DSSS system may operate at up to 11 Mbps but will not be considered compliant above 2 Mbps. The next standard approved was 802.11b, which increased transmission capabilities to 11 Mbps. Even though DSSS WLANs were able to interoperate with the Frequency Hopping Spread Spectrum (FHSS) WLANs, problems developed prompting design changes by the manufacturers. In this case, IEEE’s task was simply to create a standard that matched the manufacturer’s solution.

802.11b may also be called Wi-Fi™ or high-speed wireless and refers to DSSS systems that operate at 1, 2, 5.5 and 11 Mbps. All 802.11b systems are backward compliant in that they also support 802.11 for 1 and 2 Mbps data rates for DSSS only. This backward compatibility is extremely important as it allows upgrading of the wireless network without replacing the NICs or access points.

802.11b devices achieve the higher data throughput rate by using a different coding technique from 802.11, allowing for a greater amount of data to be transferred in the same time frame. The majority of 802.11b devices still fail to match the 11 Mbps bandwidth and generally function in the 2 to 4 Mbps range.

802.11a covers WLAN devices operating in the 5 GHZ transmission band. Using the 5 GHZ range disallows interoperability of 802.11b devices as they operate within 2.4 GHZ. 802.11a is capable of supplying data throughput of 54 Mbps and with proprietary technology known as "rate doubling" has achieved 108 Mbps. In production networks, a more standard rating is 20-26 Mbps.

802.11g provides the same bandwidth as 802.11a but with backwards compatibility for 802.11b devices using Orthogonal Frequency Division Multiplexing (OFDM) modulation technology and operating in the 2.4 GHZ transmission band. Cisco has developed an access point that permits 802.11b and 802.11a devices to coexist on the same WLAN. The access point supplies ‘gateway’ services allowing these otherwise incompatible devices to communicate.

[boyett]

Up na akong satillite disc cantenna...



kusog kaayo ang signal.... hehehe

[coolnezz]

Up na akong satillite disc cantenna...



kusog kaayo ang signal.... hehehe

cool.
can you post some screen shots with the signal graph.
which software app are you using to sniff APs.
include 'istorya.net' and 'current date' in your screen shots.
tnx!

i'm in the process of collecting parts to build a cantenna. will post pix when i build it.

[boyett]

mao ni screen shots, before and after.....

Before... signal from 15dBi omni-antenna





After... signal from satellite disc cantenna




Trial run...




ahhh... the final run..hehehe




success.....hehehe

akong gastos:
satellite disc - hinatag
Bracket - hinimo
Lata - gikan sa basurahan
2M LMR400 - 800 pesos
element adapter - 100 pesos

thanks...

[dv1000]

brilliant kyu TS!!!