Radar receiving and transmitting system adopting multi-layer microstrip connection

Abstract

The invention discloses a radar receiving and transmitting system adopting multi-layer microstrip connection, relates to the technical field of signal receiving and transmitting in radar and countermeasure systems, and solves the problem of how to improve the reliability of the radar receiving and transmitting system while meeting the miniaturization and light weight of the radar receiving and transmitting system. The system comprises a waveform and acquisition module, an up-conversion excitation module, a frequency synthesis source module, a wide and narrow band receiving module and a multi-layer microstrip connection backboard. All the modules are connected through multiple layers of microstrip plates, so that the volume weight of the system is reduced; the module is connected with the multi-layer microstrip board in a blind matching mode, so that the module is convenient to assemble and replace, and the connection detection of the backboard is rapid and convenient. By adopting the design of the multi-layer microstrip plate, besides signal interconnection, the local oscillator and the clock signal can achieve multi-path power division inside, so that the equipment quantity is simplified, and channel expansion is easy to achieve; and the requirements of volume weight and reliability design of the radar system are met while the cable assembling work of the radar system is reduced.

Description

technical field [0001] The invention relates to the technical field of signal transmission and reception in radar and countermeasure systems, in particular to a radar transmission and reception system using multi-layer microstrip connections. Background technique [0002] The radar function thread mainly performs integrated surveillance tasks on the ground / sea surface. It needs to have various modes such as SAR, GMTI, and MMTI, as well as the ability to cooperate with electronic reconnaissance. It also has multiple working methods such as scanning while tracking, tracking, and search and tracking. And it can flexibly configure the number of channels in various modes, and the antenna system chooses a phased array antenna. In order to meet the cooperative operation requirements of synthetic aperture radar and electronic reconnaissance system, the active phased array antenna is covered with T / R components in the radiation unit, and the signal received by the antenna is amplifie...

AI Technical Summary

Problems solved by technology

[0003] The following problems exist in the blind-matching backplane plug-in connection method: 1) For a transceiver system, there are N modules outputting RF terminals, there are N / 2 RF connecting cables, and there are low-frequency cables for transmitting power and control Interconnecting cables all cause the volume and weight of the transceiver system to increase; 2) RF cables and low-frequency cables are closely interwoven, and the RF signals transmitted by RF cables have multiple frequencies. In order to reduce electromagnetic interference, various additional shielding materials and measures are also required. Increase the volume and weight of the system; 3) During the long-term use of multiple connecting cables, they are prone to wear and looseness under various environmental conditions. Whether it is the looseness of the cable port that affects the standing wave or the impact of cable wear on the index, it will The reliability of the system is greatly reduced; the above problems will increase the volume and weight of the radar transceiver system and reduce the reliability of the radar transceiver system

[0005] However, the above-mentioned published documents use multi-layer microstrip substrates to connect simply between components and device levels, and do not realize the connection between system levels.

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