Single-channel array transmitting antenna based on frequency pre-coding

Abstract

The invention discloses a single-channel array transmitting antenna based on frequency pre-coding. The antenna mainly solves the problems that a conventional array transmitting antenna structure is complicated in structure, large in size and high in price and amplitude phases are different due to multiple channels. The antenna comprises a waveform generator (1), a frequency modulator (2), a digital-to-analog converter (3), an upper converter (4), a low-noise amplifier (5), a frequency tracker (6) and an antenna oscillator (7). Multipath signals generated by the waveform generator are modulated and aggregated to form a single-channel signal through the frequency modulator, the signal sequentially undergoes formal transformation achieved through the digital-to-analog convert, frequency mixing achieving through the up-converter and amplification achieved through the low-noise amplifier and then an analog radio-frequency signal is obtained. The analog radio-frequency signal outputs a multichannel signal through orthogonal demodulation and filtering of the frequency tracker, and the multichannel signal is transmitted after formal transformation is carried out in an antenna oscillator signal mode. The antenna is simple in structure, small in size, low in cost, good in antenna amplitude phase uniformity and capable of reaching the same performance index as a conventional array transmitting antenna.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a single-channel array transmitting antenna, in particular to a single-channel array transmitting antenna for realizing multi-channel signals through orthogonal frequency modulation aggregation and demodulation recovery, which can be used for communication and radar signal processing. Background technique [0002] Antennas are widely used in radio fields such as communications, radar, navigation, broadcasting, and television. They effectively radiate, receive, and transmit information through radio waves, and are an indispensable device in radio technology equipment. With the development of microwave integrated circuits, the array antenna composed of high-frequency electronic devices has attracted more and more attention. Its main feature is multi-channel processing, that is, using multiple parallel circuits to process multi-channel signals in parallel. Multi-channel is the main...

AI Technical Summary

Problems solved by technology

Since each channel of a conventional array transmitting antenna includes an up-converter, DAC, memory, and amplifier, etc., for expensive high-performance electronic devices, a large number of uses directly increase the cost of the array transmitting antenna, which is huge. The price has become the bottleneck of its promotion and use

Furthermore, the use of a large number of devices in each channel has made its volume and weight the main constraints on the scalability of conventional array transmitting antennas, especially the area available for heat dissipation is very limited

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