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This paper presents a small quarter wavelength microstrip antenna for HF and VHF band applications. The designed antenna is based on a quarter wavelength microstrip antenna whose the patch size is the same as the ground plane. The antenna is miniaturized by inserting four zigzag plates at the end of the microtrip antenna. The size of the miniaturized antenna is 60 × 60 × 30 cm3 which is correspondent...
An electrically small spherical UHF (911.25 MHz) radio frequency identification (RFID) tag antenna is proposed. A dipole-typed RFID tag antenna is wound into a spherical shape to achieve small size and quasi-isotropic pattern. The overall diameter of the antenna is 25 mm (0.076??), and the resulting electrical size is a kr of 0.24. A short stub is employed for good conjugate impedance matching with...
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