Ka-band Transceiver Component Miniaturization Technology

Millimeter-wave transmit/receive(transceiver) modules has become increasingly important in many fields such as radar, communication, navigation, remote control electronic warfare and so on. As a subsystem of high frequency front ends, millimeter transceiver modules play a key role in system.Through the analysis and research of transmitter/receiver technology, this paper puts forth a feasible design scheme according to the target. Dual channel monopulse angle measurement technique is employed in this scheme, which means it should up-convert IF signal(L-band) to RF signal(Ka-band), then amplify and output while transmitting; when receive, amplify received RF signal and then down-convert it to IF signal. Through scheme comparison and the existing experiment condition, hybrid integrated circuit and MMIC techniques are chosen to realize this transceiver module. For more than 35dBm RF signal output power, multistage amplifiers is used in this transceiver; And module can get less than 4.5dB noise figure while high receive gain by two stage LNA; E-plane fine-line filter is chosen to make the goal of high clutter suppresion and receive channel selectivity; Because of restricted dimension and interface, the layout and integration technique become a key point to realize miniaturization; Similar to the way of plug and play, power supply logic design changed with LV TTL signal make the source economic and high isolation possible. And the supply scheduling design protects the MMIC chips.According to final design scheme, Ka-band transceiver modules is made. The dimension is resctricted to 85*50*18mm. The measurement results shows the important system indicators as follows:Output power≥35dBm, in-band difference≤1dB, two channel difference<1dB, noise figure≤4.5dB, clutter suppresion≥50dB, image frequency suppresion≥40dB, receive gain≥23dB, dynamic range≥55dB.