Just got a 5bi antenna

[rugomol]

colinear coaxial (coco) antenna

Built my first antenna and doubled my coverage

I have been anxiously looking forward to building a antenna and finally got around to it this morning. It’s really a simple 4-element colinear coaxial (coco) antenna that’s outside my window attached to a bamboo pole. I made the antenna out of RG59, because I have a bunch of it and it’s the first thing I grabbed. I’ll make my next one out of RG6. I used the design I found in the Plane Finder forum here: http://forum.planefinder.net/threads/ads-b-diy-antenna.23/page-18. Go down to…

use more short cable or LNA

[Album] ADS-B FlightAware Enclosure Build

How to reduce the signal attenuation caused by long cable?

Wilson Electronics adapter 971128 . For tranmitting, impedance matching is very desireable. An impedance missmatch means that a 100W transmitter may be able to transmitt say only 70W. To transmit 100W with impedance mismatch, one may have to use a 150W transmitter at substantial higher cost. In case of receiving, since the power involved is in micro Watts or milli Watts, adding a low cost rf amplifier such as satellite in line amplifier, or Pro Stick’s built-in rf amplifier, can cover for m…

Antenna height increased but range doesn't

Raising antenna definitely improves range IF tall objects (buildings, trees etc) are around. Each foot of antenna height increase matters. Once the antenna is above height of surrounding obstructions, any further increase in its height gives very little improvement in range, unless the increase in antenna height is in hundreds of feet. SKETCH 1 of 2 [antenna-obstruction-and-range-3] . SKETCH 2 of 2 [antenna-obstruction-and-range-2A]