I'm in the process of designing a simple
microstrip rectangular patch antenna. I intend to
feed the structure by using a co-axial wire inserted
through a hole in the ground plane, and substrate.
I understand that the (0,1) and (0,3) modes of a
rectangular patch resonator both exhibit broadside
radiation and the same polarization. But what exactly
is meant by (0,1) etc.? Also I presume that one
can only excite these two modes if the antenna is
dimensioned correctly and fed in the correct location.
Could anyone elaborate on what is required?
I have found a formula than can be used to determine
dimension L. But didn’t find such formula for W.
I understand that W must be less than a wavelength
in the substrate material, in order to avoid the
excitation of higher order modes. Aside from this
limitation can/should one dimension W arbitrarily?
Several of the rectangular patches in the literature
seem to have a L/W ratio of about 0.75, is there
a reason for that?