[amsat-bb] Suggested mode S antennas for K5GNA downconverter

I am trying to come up with a portable sat station that can fit in a briefcase. I have the dipole and reflector antenna that K5GNA sells for his downconverter but I am looking for something compact that can fit in the briefcase and the reflector cant. I have thought about the G3RUH patch antenna but that is a little pricey for me at this point. Are there any other antennas that someone can suggest that I try for this quest ?

Thanks, Ron KA4KYI