Abstract—A novel circularly polarized cavity-backed antenna (CBA) excited by crossed bowtie dipoles is presented in this paper. It is fed by a transition from a microstrip line to doubleslot lines. The crossed dipoles consist of a top-loaded triangular and a filleted rhombic to achieve the required input impedance relations for circularly polarized radiation. After optimization, a simulated 3-d...

Abstract In this case, a substrate integrated waveguide technology is used in conjunction with cavity-backed slot antenna. The modified antenna, comparison to the dumbbell-shaped slot, not only adds numerous additional resonance spots, but it also enables antenna attain better gain. addition this, high-order resonant modes that are contained inside sub cavity may be stimulated by ground coplana...

Large channel capacity is achieved by MIMO (Multiple-Input Multiple-Output) technology with multi-antenna at the transmitting and receiving side [1]. Many studies to maximize the MIMO channel capacity have been performed, and measurements show that channel capacity is enhanced by directional antennas [2] and multi-polarization [3] in indoor environment. Various MIMO antennas with pattern and po...