The master thesis doesn't propose a calculation method, it uses simulation to determine the antenna dimensions (without showing a systematical approach). Simply googling "meander antenna calculation" gives many hits, also at Edaboard. You probably noticed the "similar threads" indicated below.
I believe, things are rather simple. A meander is a shortened monopole or dipole antenna, bandwidth (according to theory) and efficiency (practically) decreases with size. The behaviour is more or less similar to a coil loaded wire antenna, but the inductance is distributed.