Silicon-based time modulation phased array feed network unit and time modulation phased array system

Abstract

The invention discloses a silicon-based time modulation phased array feed network unit, which is characterized by comprising a power division module, a time modulation module, an orthogonal synthesis module and an amplifier module, and in a signal emission process, an emission signal enters the time modulation module through the power division module or directly enters the time modulation module, and then enters the orthogonal synthesis module through the orthogonal synthesis module. After signal phase shift is completed in the time modulation module, the orthogonal synthesis module carries out in-phase / orthogonal conversion and power synthesis on the phase-shifted signal, and then the amplifier module carries out signal amplification output. In the signal receiving process, after being amplified by the amplifier module, the radio frequency signal is subjected to power division and in-phase / orthogonal transformation by the orthogonal synthesis module and then enters the time modulation module to be subjected to signal phase shift, and the signal after phase shift is synthesized and output by the power division module or is directly output. The phase shift circuit is simple in structure, the phase shift precision of the system is improved, and the loss of the system is reduced.

Description

technical field [0001] The invention relates to a microwave monolithic integrated circuit and microelectronic technology, in particular to a silicon-based time-modulated phased array feeding network unit and a time-modulated phased array system. Background technique [0002] With the rapid development of wireless communication systems, phased array systems are widely used in various fields, especially in aerospace, precision guidance, short-range detection and other fields. The radiation characteristics of the traditional phased array system are realized by controlling the amplitude and phase in the feed network, and the control accuracy of the phase depends on the design of a high-precision phase shifter. With the continuous improvement of the communication rate, the design of the phased array system has entered the millimeter wave frequency band, while in the microwave / millimeter wave frequency band, the design of the phase shifter is complicated and the phase shifting acc...

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Problems solved by technology

In the microwave / millimeter wave frequency band, the insertion loss of a typical SPDT switch is 2-3dB, which will increase the loss of the system and greatly reduce the gain and efficiency of the system

In addition, in the waveform design of the time pulse modulation function and the design of the power divider / combiner required by the quadrature modulation, the existing schemes are basically based on the design of the Wilkinson power divider. However, in the silicon-based integrated circuit In the design, the area of ​​the Wilkinson power divider is huge, so it is not suitable for application in the integrated design

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