DrayTek 5dB High-gain WLAN Aerials (Pack of 3)
Wireless LAN Aerials For 802.11b/g/n
Vigor routers equipped with Wireless LAN facilities are supplied with the standard 2 or 3dBi gain aerials. A higher gain aerial provides a signal gain which can in many circumstances improve your wireless coverage/range as well as your connection speed at longer ranges, particularly where your required coverage area is currently borderline and needs a 'little extra help'.
Uni(single)directional aerials are intended for application where you want the signal in one direction only, either for increased range or for security reasons. By concentrating an aerial in one direction, both transmission strength and receive sensitivity are improved as well as benefits in avoiding interference or traffic from adjacent networks in other directions.
Wireless antenna gain is a complex area and we'd recommend seeking out a specialist site for further details but put simply, aerials are designed in such a way that they can increase the signal output from the transmitter's original output. The output of the Vigor routers wireless module is approximately 17dBm, after allowing for any loss from cables and before antennae gain. The standard aerial supplied with the router is 3dBi gain.
The ANT-2510 model is rated for outdoor use and can be used for WDS links between buildings. When used outside, the antennae connection must be wrapped in self-amalgamating tape in order to waterproof it. That tape is widely available, as used for satellite dish connections.
One, Two or Three?
Vigor routers have one, two or three aerial connectors. Having more than one gives the advantage of 'diversity' which means (put simply) that a signal subject to some local interference in one particular plane, may be better on the other aerial. On a Vigor router with two aerials, the second aerial is for receive only. The main aerial both receives and transmits. Therefore, if you are fitting a replacement aerial, it it not necessary to replace both or have two fitted. If you do have two fitted, however, they should be the same. On 802.11n 'MIMO' Vigor routers, there are three aerials. The outer two are Transmit/Receive and the centre one is Receive only. You can experiment for best performance, particularly with regard to aerial position and angle.
Technical Specifications:-
Model Name: ANT-1005
Gain: 5dBi
Freq. Band: 2.4Ghz
Beam: Omni-Directional
HPBW: 360° Horizontal 40° Vertical
Dimensions: 196mm High
Cable: None
Optional 2M Cable: N/A
Mount: Router
Supplied As: Set of 3
Location: Indoor