This covers, how and why build a wireless antenna, what cable to use and why.

Antenna simulation, this is actually more interesting and fun than it sounds. Radio is complicated, I am not proficient enough at physics to teach the theory or explain why radio is the way it is.

What I will try to do is show what I have done so far and what works and where I failed.
Before you even consider making antennas, learn to solder. Now we need to get some proper cables for wireless.

Do not buy RG-58 coax cable, it’s very lossy and rigid, it also has a very low cutoff frequency of just 3Ghz.
Do buy LMR-195,200, 240, or any of the LMR range cables.

Here is some information about RG58 and LMR 200 the replacement for RG58.

RG-58 Attenuation (source www.rfsworld.com )
Maximum Frequency, GHz 3
Attenuation,
MHz		dB/100 m	dB/100 ft.
30 		8.5 		2.6
50 		10.9 		3.3
100 		15.6 		4.8
200 		24.0 		7.3
450 		36.2 		11.0
800 		50.0 		15.2
1000 		61.0 		18.6
1800 		92.0 		28.0
2000 		100.0 		30.5
2400 		116.0 		35.4
LMR 195 (source TIMES MICROWAVE SYSTEMS)
Maximum Frequency, GHz 41
Attenuation,
MHz		dB/100 m	dB/100 ft.
30 		6.5 		2.0
50 		8.4 		2.5
220		17.7		5.4
450 		25.5 		7.8
900		36.5		11.1
1800 		52.5 		16.0
2000 		55.4 		16.9
2500 		62.4  		19.0
5800		98.1		29.9

CABLE LOSS CALCULATOR

http://www.ocarc.ca/coax.htm

Belden 8240 (RG-58)
10M Cable for 2.4 Ghz (wireless)
Loss 8.464
Power in 100 W
Power out 14.244

TMS LMR-200
10M Cable for 2.4 Ghz (wireless)
Loss 5.421
Power in 100 W
Power out 28.701

http://binarywolf.com/249/connectors.htm#null
subtract about 1/4 dB loss per connector

Buying LMR cable & other wireless bits in UK:

MS Distribution << the only store I can recommend, great service and good products.

http://uk.wifi-link.com

http://wifigear.co.uk

More Soon..