Design of miniaturized patch crossover based on superformula slot shapes

<p>In this paper, miniaturized microstrip crossover circuits are proposed using slots shapes obtained the superformula. The design starts by a conventional half-wavelength square patch crossover. For miniaturization purposes, different superformula slot introduced on patch. crossovers designed to operate at 2.4 GHz 0.8 mm thick FR-4 substrate with relative permittivity of 4.4. designs simulated high frequency structure simulator (HFSS). One is fabricated and its scattering parameters measured vector network analyzer. Simulated results agree very well. At frequency, input port matching better than ˗19 dB, while