Multi-polarized microstrip patch antenna is disclosed. A first substrate on which the ground is provided on the lower surface; A second substrate that is stacked on the first substrate; A power supply line which is provided between the first substrate and the second substrate (feed line); Including the S-band microstrip patch (X band microstrip patch) is formed on the upper surface of the second substrate, wherein the S-band microstrip patch, and a square-shaped, cross-shaped slot is provided in the center in the square shape, and inscribing The circular slot is provided, each PIN diode is the closest to the point in the vertices of the square shape of the slot is configured such that a circle having. According to the multi-polarized microstrip patch antenna as described above, by forming a cross-shaped slot and a circular slot in the square microstrip patch and place the four PIN diodes, it is effective to obtain a multi-polarization characteristics. More specifically, the cross-polarization and to operate in the same frequency band in the same electrical length (between a linear polarization, circular polarization between), it is effective to satisfy the impedance matching and the operating frequency band by the cross-shaped slot. ; 展开▼
