Broadband dual-polarization antenna feeder unit

Abstract

The invention provides a dual-polarization broad band antenna feeder unit, which adopts a dipole which uses two striplines to feed to form a crossed structure, is fixed on an earth plate, and forms an angle of plus 45 degrees and an angle of minus 45 degrees with the axis of the earth plate serving as an angle bisector on which a separating metal sheet (27) is fixed. The conduction bands arranged on the upper ends of the two striplines bend and are arranged deviating form central points of respective dipole radiation arms and pass through crosswise up and down at the central points of respective dipole radiation arms and fixed on two radiation arms (7) and (4) which deviate far form the central points. The width of the conduction bands of the striplines, a supporting plate, and the radiation arms are respectively W3, W2 and W1. The distance between the two radiations of the dipole is W4; and the distances form the radiation arms to the central points are W5 and W6. W1, W2, W3, W4, W5, W6 as well as the height, width and position of the metal sheet (27) are all adjustable. The invention has the advantages of the frequency broad bands and an isolation of 30 Db, can compose dual-polarization array antennae, wherein HPBWH is equal to 65 degrees and HPBWH is equal to 90 degrees, for use as base station antennae of double-frequency and tri-frequency.

Description

technical field [0001] The invention relates to antenna technology, in particular to a broadband dual-polarization basic antenna feed unit, which can be used to make mobile communication base station antennas. Background technique [0002] With the rapid economic development of countries all over the world, dense and tall buildings have sprung up like mushrooms after a spring rain, making the propagation environment of mobile communication radio waves more and more severe. In order to overcome the signal fading caused by multipath effects on mobile communication, the Space diversity consisting of two identical antennas is an effective solution. However, with the increase of various communication services and the continuous enhancement of residents' health awareness, it is becoming more and more difficult to find a place to install two antennas using space diversity in cities, forcing people to reduce the number of antennas and installation space, so there is a combination of...

AI Technical Summary

Problems solved by technology

For example, the antenna feeder unit with patent application number: 2007 1001 7809.5 can easily form a horizontal plane half-power beam width HPBW H = 65° dual-polarized plate antenna, but to use this kind of antenna feed unit to form a horizontal half-power beam width HPBW H = 90° dual-polarized plate antenna, it is necessary to widen the width of the U-shaped ground plate, which not only increases the cost of the antenna, but also increases the weight of the antenna

[0004] The U-shaped symmetrical vibrator used in the existing cross-shaped dual-polarized base station antenna array is fed by a coaxial line, which makes the structure of the antenna complex and high in cost, especially the narrow frequency band, isolation and passive third-order intermodulation. Disadvantages of compliance

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