Radiation of a strip antenna with a half-wavelength resonance mounted on a finite cylindrical conductor

A numerical model is presented describing the radiation field from a rectangular microstrip that functions at the half-wavelength resonance and is mounted on a cylindrical surface for omnidirectional broadcasting. The model is simplified by neglecting the higher modes of functioning and assuming a sinusoidal distribution of currents and voltages along the antenna. An equipotential distribution is designed into the device by including equidistant multiple excitation points. It is shown that the radiated field is dependent on the relative dielectric constant, while the wavelength available is dependent on the cylinder diameter. Optimization allows for a large coverage pattern in the E plane, with omnidirectional radiation present in the H plane, a factor which is verified experimentally.