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This letter proposes a reconfigurable microstrip patch antenna with polarization states being switched among linear polarization (LP), left-hand (LH) and right-hand (RH) circular polarizations (CP). The CP waves are excited by two perturbation elements of loop slots in the ground plane. A p-i-n diode is placed on every slot to alter the current direction, which determines the polarization state. The...
A novel compact reconfigurable microstrip antenna with agile polarization is proposed. Two small orthogonal notches near opposite angles of the square patch are cut. A PIN diode is placed on every notch and is used as switch to change the current distribution. By controlling two switches, the antenna can operate on left-hand, right-hand and linear polarizations. This antenna is designed, fabricated...
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