Rigid method for dispersion relation of plasma antenna

The range for rationality of ideal boundary condition is discussed at length. Plasma antenna is always out of the range, but many studies based on this ideal boundary condition. So we use a more appropriate method to cope after rigid boundary conditions are derived. In some cases, the results tally with those by usual method, and in other cases, some conclusions are obtained which cannot get from the usual way but reasonable theoretically. The dispersion relation of plasma antenna is given finally.