# Dual Band Antenna Matching

I am building a wideband dual band omni for school. My antenna is about 2m long. The antenna length basically has two sections (divided by ports) - from 0 - 1.8m (This length is for 20-180MHz) and from 1.8m - 2m (This length is for 500-3000MHz). I have two edge ports feeding each section i.e. port at 0m and port at 1.8m.

I have managed to match for 20-180MHz band, but am struggling for the other band, is there a way to make sure that "port 2" doesnt see the impedance below it - i.e. impedance seen by port1.

How can i go about matching for the other port?

# N.B This is all being done in a simulation package "Feko"

• Have you looked at diplexers? (Too late for your project, I know. I just joined the forum.) – AG5CI Jun 6 '17 at 20:21