Passive DF Antenna Array and Phase Interferometer for Phase Interferometer

Abstract

The invention discloses a passive direction-finder antenna array of a phase interferometer and the phase interferometer. The passive direction-finder antenna array comprises three layers from inside to outside. The first layer is a circular antenna array composed of a plurality of dual-polarization omnidirectional antenna array elements which are arranged on a circumference, each dual-polarization omnidirectional antenna array element comprises a horizontal polarization oscillator and a perpendicular polarization oscillator and is connected with one-out-multiple antenna switch through a polarization choice output matching board, and the horizontal polarization oscillators and the perpendicular polarization oscillators on the circumference are adjacently arranged; the second layer is a horizontal polarization antenna array which comprises a horizontal polarization annular oscillator; the third layer is a perpendicular polarization antenna array which comprises a perpendicular polarization biconical antenna oscillator and two cones in the perpendicular polarization biconical antenna oscillator are respectively connected with a matching circuit; the horizontal polarization antenna array of the second layer and the perpendicular polarization antenna array of the third layer are connected with the input ends of the same one-out-two antenna switch. The passive direction-finder antenna array has the advantages of being simple in structure, low in production cost, high in testing sensitivity and high in accuracy.

Description

technical field [0001] The invention relates to a radio direction-finding system, in particular to a passive direction-finding antenna array of a phase interferometer and a phase interferometer. Background technique [0002] With the application of radio communication technology more and more widely, radio frequency spectrum resources are becoming more and more scarce. In order to better manage the limited radio spectrum resources, there is an urgent need for a sensing device that efficiently and accurately senses the source of wireless electromagnetic signals. The basic function of the radio direction finding system is to estimate and invert the azimuth of the emission source of the radio signal. [0003] At present, almost all the mainstream direction finding systems at home and abroad use active direction finding systems. Active amplifiers are integrated on the direction-finding vibrator of the active direction-finding system. The pre-amplifier amplifies the received we...

AI Technical Summary

Problems solved by technology

The traditional active direction-finding antenna array is limited by the working bandwidth of the active circuit and the consistency requirements of the antenna electrical performance index in the wide frequency band. It usually adopts a divided frequency band design. Although its volume can be made relatively small, the structure is complex and the cost is high; Most of the existing passive direction-finding antenna arrays adopt the omnidirectional dipole sub-band design, which makes the structure of the direction-finding antenna array not only complex but also bulky, and this design method is mostly used for single polarization (vertical polarization) The design of the antenna array, if it is used for the design of the dual-polarized antenna array, the structure of the entire antenna will be more complicated and the size will be larger

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