In this paper, a microwave transmitter module integrating a slot ring array antenna, a Push-Push oscillator and a PSK modulator with simple structure is presented. The oscillator generates high frequency signal with low cost. The modulator achieves a RF direct modulation with a simple structure as well. In the slot array antenna, the cross component has been suppressed enough due to the ... [Show full abstract] complementary effect of the mirror symmetrical arrangement. The module can generates high frequency signal and is realized with low cost and compact size by using the Push-Push principle and a double-sided MIC technology.