The driving module is the key component of the electronic scanning array radar system, which controls the radio frequency signal of the whole radar. It must have the characteristics of high performance, low cost, lightweight, miniaturization and easy to use. To meet this requirement, a miniaturized multi-channel Ku-band driving module design scheme is proposed in this paper. The module integrates four-channel T/R amplifier circuits, two-channel calibration switch circuits, and a RF power division network, with a total of 19 radio frequency interfaces, which can significantly reduce the number of active amplifiers in the radar system. The module adopts a positive and negative double-sided open-cavity design, combines with vertical interconnection technology to achieve more than 80dBc channel isolation of calibration switch circuit, and has good gain flatness and inter-channel phase consistency. The overall size of the module is 107mm*84mm*12mm, the weight is only 202g, the transmit power of the odd channel is greater than 26.7dBm, and the transmit power of the even channel is greater than 28.4dBm. This module can be widely used in car navigation, radar detection, and other fields due to its characteristics of small size, rich function, and easy integration.

A Ka-band four-channel T/R module for electronic scanning array radar is proposed in this paper, which is small in size, lightweight, easy to produce, and has good channel consistency. Adopting the open cavity design on both sides, the microwave signal and the power signal are completely isolated in space with good electromagnetic compatibility characteristics. Moreover, a “carrier-free” assembly scheme is proposed in this design, which removes the thermal matching carriers at the bottom of the MMIC chips used in traditional modules, simplifying the assembly process and achieving a high automation rate. The reliability of the scheme is verified by rigorous temperature shock and random vibration tests. The overall size of the module is 50 mm*84 mm*9.2 mm, and the weight of a single channel is only 17.5 g. The transmit saturated output power is greater than 21.5 dBm, and flatness is less than 0.8 dB. The receiving increase is greater than 7.5 dB, and flatness is less than 1 dB. The noise figure is better than 5.5 dB. The design ideas proposed in this paper have good generalization in the design of low-power T/R module.