The antenna is a simple 2 meter half wave dipole. I created a PCB that would accommodate either soldered elements or elements attached via SMA connectors.
They look like the following:
Here is one built up using soldered elements:
The elements consist of copper coated steel wire (.062″) used for welding. The copper coating makes it possible to solder to a PCB. I initially built the elements slightly long so I could tune it up by trimming.
Luckily, I have access to a network analyzer which I used for testing and tuning. Here it is hanging from the VNA:
and here is the initial scan:
Marker-2 is set to the desired frequency of 144.4 MHz, and marker-1 is set to the initial resonant point which turned out to be approximately 142.0 Mhz.
After trimming, the final results look pretty good for this simple antenna: