Pifa
í µí±³í µí¿ + í µí±³í µí¿ = í µí±í µí± í µí± =1 í µí°¿1
í µí½ í µí¿ í µí°¿1 + í µí°» = í µí¼ 4 í µí¼ 4
í µí±í µí± í µí± = 0
í µí°¿1 + í µí°¿2 + í µí°» =
where: í µí°¿1 and í µí°¿2 are the dimensions of the top plate í µí± is the width of the short circuit plate í µí°» is the height of the short circuit plate
Impedance Matching The impedance matching of the PIFA is obtained by positioning of the single feed and the shorting pin within the shaped slot, and by optimizing the space between feed and shorting pins. The main idea behind designing a PIFA is to avoid using any extra lumped components for matching network, and thus avoid any losses due to that.[4] Radiation Pattern The radiation pattern of the PIFA is the relative distribution of radiated power as a function of direction in space. In the usual case the radiation pattern is determined in the far-field region and is represented as a function of directional coordinates. Radiation properties include power flux density, field