I searched the forum and didn't find any input on this subject. Dear PF members, I need your help. I am at training for a university, and am assigned a project where I should design a quad-band (or tri) GSM antenna for a vehicle. I am going to second year EE undergrad. so I am only required to set the furnishing ground for the project and produce a report at the end. I have searched google, wikipedia, IEEE, and read Balanis and ARRL amateus book (first chapter only)... I need to ask a few questions which I hope you might consider answering using your superior knowledge on the subject. 1 - I have in mind a "modified" dipole antenna which have parasitic elements. Each of those elements would resonate at one of the frequencies of GSM system (850/900/1800/1900). Is this feasible? If yes, can you give me an insight on how this can be done? 2 - I will be using EMPIRE software for simulations, is anyone familiar with it? That is it for nowa, I hope you might not find this post too daunting for you. (after all, we are engineers).