The much touted & very popular Diamond RH77CA is an excellent all band portable antenna that even I recommend & I detest Diamond Antenna products especially the base station ones who's manufacturing specs reek of snake oil, if your listening is band specific then seek an antenna that covers that particular chunk of spectrum, most of my portables are commercial grade with the matching antenna already on it, you can go that route & acquire an antenna from any Land Mobile radio or Amateur radio distributor, just make sure the antenna utilizes a male BNC connector. Enjoy your weekend.