Abstract
Circularly polarized sequentially rotated gap-coupled array configuration of angular Sectoral slot cut circular Microstrip Antenna in 1000 MHz frequency band is proposed. The angular Sectoral slot degenerates TM 11 mode into two orthogonal modes to give axial ratio and VSWR bandwidth of 10 and 43 MHz, respectively, in a single patch. To increase gain and axial ratio bandwidth, sequentially rotated gap coupled array configurations of angular Sectoral slot cut circular microstrip antenna are proposed. On thinner glass epoxy substrate, maximum VSWR and axial ratio bandwidth of 52 and 32 MHz, respectively is obtained in 3 × 3 array configuration. While optimizing on lossy thinner substrate, due to 3 × 3 array configuration, antenna yields broadside co-polar gain of nearly 2 dBi. In 1000MHz frequency band, the proposed configuration can find applications in wireless communication systems where transmitter and receiver antenna orientations are not important.
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