X-band TR module for radar and wireless communication systems

The paper presents the design and fabrication of an X-band transmit receive module operating in the frequency range of 9.25 to 10.75 GHz. The proposed TR module consists of a circulator, a power amplifier and a low-noise amplifier, which are fabricated using hybrid microwave integrated circuit technology. Amplifier design procedures are presented with focuses on stability improvement, wideband matching and noise matching techniques to improve amplifiers´ performances. The designed power amplifier with good input and output matching exhibits 15-dB power gain and provides measured output power of 15.1 dBm and OP1dB of 22.5 dBm. The designed low noise amplifier has a very low measured noise figure of 2 dB and a high gain of 20 dB over the whole bandwidth, good input/output matching is also achieved with measured S11 and S22 smaller than -10 and -12 dB, respectively. Amplifiers are integrated with circulator to build a complete TR module which helps extend operating range of radar and wireless communication systems.