M+2n cascade mode phase array antenna based on Radant lens

Abstract

The invention provides an M+2n cascade mode phase array antenna based on a Radant lens. The antenna comprises the Radant lens, a radiating antenna, a T / R module, a feed network and a transmitting and receiving system, wherein an emitter transmits a radio-frequency signal, the radio-frequency signal is output to the T / R module through the feed network, the T / R module achieves orientation phase shifting, then the signal is input into the radiating antenna, and finally the signal is transmitted to free space through the Radant lens which achieves pitching phase shifting at the front end of the antenna. The received signal passes through a system channel and forms a required sum and difference signal after passing through a sum and difference comparator, and the two-dimensional single pulse function is achieved. Functions of M*N phase array antennae are achieved through the whole M+2n cascade system architecture. The requirement for low loss, small occupied space, low complexity and high efficiency of a phase array system are achieved, the cost of a phase array radar is reduced, and the usage rate of the phase array radar is improved.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to an M+2N cascaded phased array antenna based on a Radant lens. Background technique [0002] In order to realize the airspace beam scanning of M×N two-dimensional phased array radar, it is usually necessary to use M×N digital phase shifter chips at the back end of the phased array antenna, and the cost of the chip has always limited the wide application of phased array radar. The key factor. The traditional M×N phased array radar cascade method is usually: Radar systems designed in this way have the following disadvantages: [0003] 1. The M×N phased array uses M×N T / R components, so M×N connecting cables are required when two components are connected, and the number of stages of the feed network will increase greatly, which will cause loss increase and decrease system efficiency. [0004] 2. The increase of M×N phased array T / R components will increase the cooling system....

AI Technical Summary

Problems solved by technology

[0003] 1. The M×N phased array uses M×N T / R components, so when two components are connected, M×N connecting cables are required, and the number of stages of the feed network will increase greatly, which will cause loss increase and decrease system efficiency

[0004] 2. The increase of M×N phased array T / R components will increase the cooling system. The increase in the number of these phase shifters, cables, and cooling systems makes the system more complex and takes up more space

[0005] 3. The M×N phased array uses M×N T / R components. At present, the chip price inside the T / R component is relatively high, which makes the radar system very expensive and cannot be widely used.

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