Array antenna monitoring antenna and application thereof

Abstract

The invention discloses an array antenna monitoring antenna. The array is an axial wide-beam antenna, and comprises a monopole radiator, which is a metal cylinder; a radiator protection medium sleeve, which is wrapped outside the monopole radiator and is equal in length with the monopole radiator; a medium support column body, which is used for supporting the monopole radiator and used for enhancing overall structural strength of the antenna to ensure that the monopole radiator does not deform; a coaxial feed device, the top portion of which extends out of an inner conductor, the inner conductor being externally sleeved by the medium support column body to form an impedance transition section, and the monopole radiator being same with the inner conductor in diameter; and a fixation base, which is used for fixing the whole antenna, the connection body of the coaxial feed device and the medium support column body being inserted and embedded into the fixation base, and the coaxial feed device playing a function of earth in the circuit. The advantages are that plane of the antenna array plane has a horizontal and omnidirectional radiation directional diagram; and such antenna is simple in structure, small in size, low in cost and high in reliability.

Description

technical field [0001] The invention relates to the technical fields of radar, communication, measurement and control and remote sensing, in particular to an antenna for array antenna monitoring and its application. Background technique [0002] After the array antenna is put into operation, it is necessary to monitor the amplitude and phase errors between the antenna units during each start-up process, so as to monitor the failed microwave devices in the non-stop working state and repair and replace them in time, so that a large number of antenna units The array antenna guarantees high working reliability. In array antenna monitoring, according to the different sampling or test signal injection paths of the array unit, it is divided into two types: internal monitoring and external monitoring. Among them, the out-of-plane monitoring channel of the array antenna is a channel used for external monitoring of the phased array antenna based on the unit mutual coupling theory. A...

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Problems solved by technology

However, this kind of internal monitoring network cannot monitor the antenna unit and mutual coupling, and there is a certain difference between the monitored amplitude and phase data and the actual data; and this kind of internal monitoring network cannot monitor the installation error of the antenna, and the amplitude and phase of the array element pattern are inconsistent sex

Xi'an Electronic Engineering Research Institute proposed a far-field calibration method for phased-array radar transmission channels in the patent "A Far-field Calibration Method and System for Phased-Array Radar Transmission Channels" (publication number: CN104360328A). Antennas whose polarizations are perpendicular to each other install an auxiliary antenna whose polarization is perpendicular to the array to receive the signal from the far-field antenna and process the signal in the radar signal processor; this method is less expensive than the traditional method. It eliminates the need to set up signal measurement equipment such as spectrum analyzers and oscilloscopes at the remote end, and eliminates the need to transmit reference clocks at the remote end; although this patent has advantages in antenna array phase calibration, it does not mention the method of antenna array amplitude calibration

In August 2012, "Acta Microwave Sinica" published the document "Automatic Calibration and Array Detection Method of Phased Array Antenna Based on Near-field Test" for the miniaturized phased array platform. Combining with test equipment, a simple automatic near-field point-by-point calibration method and external monitoring method are proposed; this method has the advantages of fast speed, high calibration accuracy, and less equipment requirements, but for large-scale In the case of scanning, the calibration and monitoring effect will be deteriorated

In 2008, the master's degree thesis "Research on Phased Array Antenna Monitoring Technology" published by Nanjing University of Science and Technology introduced in detail the internal and external monitoring technology applied to phased array radar, and proposed a practical implementation of phased array internal and external monitoring technology. In the implementation of the external monitoring scheme, in order to ensure the uniformity of the energy coupled to each channel, four unit antennas are used as the monitoring antennas. Although the coupling energy uniformity is good, the use of multiple monitoring antennas has a greater impact on the surface radiation characteristics. increased system complexity

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