Abstract :
The determination of directivity values for circular microstrip patches on thin substrates involves the use numerical integration procedures, which have to be repeated every time there is a change in patch-substrate permittivity, By a judicious use of certain approximations, it is shown here that it is possible to secure surprisingly accurate alternative descriptions of the patch directivity behavior (as a function of permittivity), in terms of either known tabulated functions, or functions that can be easily accommodated using a hand-held calculator
Keywords :
antenna theory; approximation theory; directive antennas; microstrip antennas; approximation; circular microstrip-patch antenna; patch directivity; permittivity; thin substrates; Antenna radiation patterns; Antennas and propagation; Closed-form solution; Equations; Magnetic materials; Magnetic resonance; Microstrip antennas; Permittivity; Resonant frequency;
