Double-fed dual-polarization microstrip antenna

Abstract

The invention relates to a patch antenna, in particular to a double-fed dual-polarization microstrip antenna. The double-fed dual-polarization microstrip antenna comprises a dielectric substrate and a radiation patch arranged on the front face of the dielectric substrate, a geometric center of the radiation patch is coincided with that of the dielectric substrate 1, and the back face of the dielectric substrate is grounded. The radiation patch is in a shape of a toothed gear and comprises a central circular piece, four identical concentric arc pieces, four identical radial strip pieces and four teeth; the four concentric arc pieces and the four identical radial strip pieces are symmetrically arranged on the outer periphery of the central circular piece, and each concentric arc piece is connected with the central circular piece through one radial strip piece; the four teeth are uniformly distributed and orthogonally positioned at four ends of the radiation patch and are arranged at two ends of each concentric arc piece, two adjacent teeth of the four teeth are identical U-shaped teeth, and the other two adjacent teeth are identical broken teeth which are U-shaped teeth with radial middle openings serving as feed ports. The double-fed dual-polarization microstrip antenna is high in isolation and has excellent dual polarization characteristics.

Description

technical field [0001] The invention relates to a patch antenna, in particular to a double-fed double-polarized microstrip antenna with high isolation of unidirectional radiation fed by slot lines. Background technique [0002] With the rapid development of modern digital multimedia technology, human beings have an increasing demand for the transmission of images, audio, video and other media in daily mobile communications. 4G network communication is an emerging technology. Compared with traditional communication technologies, the transmission rate can reach 100Mbit / s, and it can ensure the stability and security of transmission. Therefore, the 4G network has attracted the attention of more and more users. TD-LTE technology, one of the technical labels of 4G network, its key technology is MIMO (Multi-InputMulti-Output) technology. MIMO technology utilizes the space-time processing technology of the multi-antenna system to transmit multiple pieces of data at the same time,...

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Problems solved by technology

Literature (Lu J, Kuai Z, Zhu X, et al.A high-isolation dual-polarization microstrip patch antenna with quasi-cross-shaped coupling slot[J].Antennas and Propagation,IEEE Transactions on,2011,59(7) :2713-2717) adopts the dual-polarized patch antenna with quasi-cross slot coupling feed, the isolation is generally better than 40dB in the working frequency band, but there are two peaks in the S21 curve, which seriously affects the isolation in this frequency band performance, and the feed model of this structure is relatively complex; and because of the slot coupling feed, it will radiate to the back of the ground plane, affecting the gain of the antenna

Literature (Yuan D, Du Z, Gong K, et al.A novel dual-band printed diversity antenna for mobile terminals[J].Antennas and Propagation,IEEE Transactions on,2007,55(7):2088-2096) Introduction 1 A dual-frequency dual-polarized antenna composed of two back-facing monopoles printed on a circuit board is applied to a polarized antenna capable of dual-frequency operation on a mobile terminal, but its isolation is different in the two frequency bands. Only 13dB and 16dB

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