Multipath all-phase microwave numerical-control phase shifter control system and method
A control system, digitally controlled phase-shifting technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as low circuit temperature stability, uncontrollable, phase consistency changes, etc., and achieve rapid waveform agility and broadband frequency agility change, stable performance, and improved reliability
Inactive Publication Date: 2016-09-28
INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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Problems solved by technology
Due to the inherent temperature drift properties of analog circuits, the temperature stability of such circuits is not high
Therefore, the phase consistency varies with the ambient temperature and is not controllable
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[0019] In order to clearly understand the technical solution of the present invention, its detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of the invention is not limited to specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, and there may be other implementations besides those described in detail.
[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0021] The numerical control phase shifter mainly uses DDS as the core to realize the high-precision adjustment of the phase, which is not easy to produce temperature drift and has stable performance. It adopts an all-digital structure and has outstanding advantages such as precise frequency resolution, fast frequency conversion time and low phase noise. , which provides an effective technical ap...
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The invention discloses a multipath all-phase microwave numerical-control phase shifter control system, and the system comprises a far end and a local end. The far end comprises control software, a computer and an optical fiber transceiver A, wherein the control software, the computer and the optical fiber transceiver A are connected sequentially. The local end comprises an optical fiber transceiver B, a serial port server, a time sequence controller and a numerical control phase shifter, wherein the optical fiber transceiver B, the serial port server, the time sequence controller and the numerical-control phase shifter are connected sequentially. The optical fiber transceiver A and the optical fiber transceiver B are used for receiving and transmitting optical fiber signals in a paired manner. The system enables a numerical-control phase shifter to achieve large-scale phase shift (0-360 degrees) in a high-frequency range, employs a mode of the serial port server + the time sequence controller for design , simplifies the connection of external cables, improves the reliability of systems, effectively solves problems that the phase precision decreases after the phase shifter carries out 180-degree shift (reverse) and there is a nonlinear change, and guarantees that the phase precision is less than 2.5 degrees.
Description
technical field [0001] The invention belongs to the technical field of radar systems and microwaves, and in particular relates to a control system and method for a multi-channel all-phase microwave numerical control phase shifter. Background technique [0002] Digital phase shifters are widely used in radar systems and microwave communication systems, especially phased array radars, phased array antenna feed systems, etc. As the basic unit and core component of the phased array radar system, the T / R component is directly related to the pros and cons of the entire phased array radar, and the digitally controlled phase shifter is an important part of the T / R component, so for the digitally controlled phase shifter The research on the device is very urgent and important. In carrier coherent measurement or communication systems, it is often necessary to use phase shifters to perform precise program-controlled phase shift operations on signals. [0003] The most important techn...
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Login to View More IPC IPC(8): G01S7/02
CPCG01S7/02
Inventor 卓红艳孟凡宝胡进光刘志强彭文黄华戈弋朱军
Owner INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS