35results about How to "Increased cross-polarization ratio" patented technology

The invention discloses a low-profile high-gain fractal small-scale base station antenna, which is characterized in that it includes a radome, a reflector assembly, a substrate substrate, a metal partition array, a dielectric substrate printed with an antenna vibrator, and an antenna vibrator. The feeding coaxial feeder; the antenna vibrator includes four sheet-shaped units that are symmetrical about left and right, up and down, two units on each opposite corner of the four-sheet units form a pair of dipoles, and the four sheet-shaped units form a cross oscillator; Iterative I2 square von Koch fractal curves are connected head to tail to construct a Minkowski fractal ring, and then filled as a plane piece, and a pair of diagonals are constructed at the upper right corner or upper left corner of the fractal ring with the diagonal as the axis of symmetry Ears, formed by merging them with fractal rings. Through the reasonable design of the antenna structure of the fractal small base station, the present invention realizes significant suppression of low profile back lobe, significant improvement of front-to-back ratio and cross polarization ratio; realizes high gain and high efficiency that cannot be achieved by a pair of conventional cross oscillators.

The invention provides a dual-polarized vibrator unit, an antenna and a multi-frequency antenna array. The dual-polarized vibrator unit includes a radiator and a balun support portion for feeding of the radiator. The radiator includes a dielectric substrate, two pairs of dipole antenna arms being disposed on an upper surface of the dielectric substrate and in orthogonal arrangement of plus or minus 45 degrees, and at least one coupling metal strap disposed on a lower surface of the dielectric substrate. Current induction is generated between the dipole antenna arms and the coupling metal strap so that a current path is formed on the coupling metal strap. The vibrator unit and the antenna thereof in the invention can achieve the ultra-broadband, high gain, high efficiency, high cross polarization ratio and high front-ratio, high isolation, low profile and low coupling and is simple and beautiful in structure, easy in engineering realization and suitable for mass production, the production cost is reduced, and the electrical performance index meets the base station antenna industry standard.

The invention discloses a high-selectivity and low-profile microstrip dual-polarization filtering antenna and mainly solves the problems of relatively poor high selectivity and relatively low cross polarization ratio in a zero-degree direction of a traditional filtering antenna. The high-selectivity and low-profile microstrip dual-polarization filtering antenna comprises a low-layer feeding network structure (1), an intermediate-layer main body structure (2), an upper-layer coupling radiation structure (3) and an antenna cover (4) from bottom to top, the intermediate-layer main body structure(2) comprises an intermediate-layer floor (21) and a cross coupling slot radiation structure (26), a group of slots are etched in the intermediate-layer floor (21), are same in shape, are centricallysymmetric to an antenna center and are used for achieving high cross polarization ratio of the antenna in an axial direction. The group of cross coupling slots perpendicular to each other are etched on the cross coupling slot radiation structure (26), and four rectangular grooves perpendicular to the cross coupling slots are etched and are used for achieving wideband external inhibition of the antenna. By the high-selectivity and low-profile microstrip dual-polarization filtering antenna, the cross polarization ratio in the zero-degree direction is improved, the filtering effect of the antennais improved, and the high-selectivity and low-profile microstrip dual-polarization filtering antenna can be used for wireless communication.