Ultra short span quasi-eight-wood metal-resistant antenna and electronic label using the same

Abstract

The invention discloses an ultra-short spacing quasi-Yagi anti-metal antenna which comprises a director dipole, a first dielectric plate, an active dipole, a second dielectric plate and a reflector laminated sequentially. The director dipole and the active dipole are metal thin layers, on which a multi-folded vibrator image is etched. The reflector is a metal thin layer. The metal thin layers of the active dipole, the director dipole and the reflector are in parallel to each other. The active dipole and the director dipole are in staggered arrangement and the central axis in the normal direction of the active dipole and the director dipole are not coincident to each other. The interfering energy caused by a metal object is converted into the available component for increasing the read-write distance of an RFID device. Meanwhile, the complex structure, such as EBG, is avoided, and a planar folding structure with convenient manufacture can be realized by adopting the simple printed circuit manner. Moreover, the adopted high-frequency dielectric plate belongs to the domestic products in mass production with low cost. In addition, compared with the conventional quasi-Yagi antenna, the quasi-Yagi anti-metal antenna has the advantages of greatly reduced size and anti-metal performance while maintaining high gain.

Description

technical field

[0001] The invention belongs to the technical field of wireless communication, and relates to an antenna, in particular to an ultra-short-pitch quasi-yagi anti-metal antenna; at the same time, the invention also relates to an electronic label made by using the ultra-short-pitch quasi-yagi anti-metal antenna. Background technique

[0002] The Yagi antenna was invented by the Japanese Yagi and Uda in the last century, and consists of a reflector, an active vibrator and a directing vibrator. The active oscillator is located between the reflector and the directing oscillator, the direction of the active oscillator pointing to the guiding oscillator is the radiation direction of the antenna, and the direction of the active oscillator pointing to the reflector is opposite to the radiation direction. The length of the reflector is slightly longer than that of the active vibrator, and it plays the role of reflecting incoming waves to the active vibrator. There can b...

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