4 results about "Planar monopole" patented technology

The present invention is a planar monopole loop composite multi-broadband antenna, which designs the ground wire into a loop shape, surrounding the asymmetric T-shaped monopole signal line to increase the path of the antenna surface current and create low-frequency resonant frequency band of the antenna. The antenna has the characteristics of a balanced antenna, and the radiation performance and bandwidth of the antenna are not affected when the ground plane changes Placing the signal line close to the ground line creates a coupling effect to increase the path of the antenna's surface current, thereby increasing the flatness of the antenna's high-frequency resonant frequency band impedance bandwidth.

This invention discloses a planar monopole loop composite multi-frequency broadband antenna, comprising a carrier, a signal line, and a loop ground wire. By designing the ground wire as a loop type, surrounding the asymmetric T-type monopole signal line, the path of surface current of the antenna is increased, creating low-frequency resonance of the antenna and giving the antenna characteristics similar to a balanced antenna. This overcomes the fact that the antenna's radiation efficiency and bandwidth are not affected when the ground area changes. By bringing the signal line close to the ground wire to form a coupling effect, the path of surface current of the antenna is increased, thereby increasing the flatness of the impedance bandwidth of the high-frequency resonance of the antenna.

The application discloses a holographic metamaterial array antenna applied to an RFID reader-writer, which comprises an impedance modulation unit area and a planar monopole area, wherein the impedance modulation unit area is formed by periodically arranging impedance modulation units in a rectangular shape, the impedance modulation unit comprises at least two layers of rectangular metal patch layers and at least two layers of rectangular dielectric layers and is located above a layer of rectangular metal ground plate layers, and the rectangular metal patch layer farthest from the rectangular metal ground plate layer has a slit structure; the planar monopole area is arranged at a central position of the holographic metamaterial array antenna, the planar monopole area comprises a planar monopole, at least one layer of rectangular dielectric layers and a layer of rectangular metal ground plate layers, wherein the planar monopole is located at the same layer as the rectangular metal patch layer; and the thickness of the planar monopole area is less than or equal to the thickness of the impedance modulation unit area. The application has clear working area boundaries, can realize a powerful working area field type and uniform coverage, and further improves reading effect.

The utility model discloses a planar monopole loop composite multi-frequency broadband antenna, which comprises a carrier, a signal line and a loop grounding line, and is characterized in that the grounding line is designed into a loop shape and surrounds the signal line in an asymmetric T-shaped monopole shape, so that the path of surface current of the antenna is increased, the low-frequency-band resonance of the antenna is created, and the antenna is more compact. The antenna has the characteristics of a balance-like antenna, the radiation efficiency and the bandwidth of the antenna are not affected when the grounding area changes, and the signal line is close to the grounding line to form a coupling effect, so that the path of surface current of the antenna is increased, and the flatness of the impedance bandwidth of high-frequency band resonance of the antenna is further increased.