Ka-band Low-noise Receiver Front-end Research

In microwave and millimeter-wave systems, receiving front-ends play critical roles for the whole system performance. The theory and design of a Ka-band low noise integrated receiving front-end are discussed in this dissertation. First, a brief introduction is presented, including millimeter-wave and its characteristics. In addition, the development of microwave devices and integrated circuits is included. Based on the principle of radar receivers and design targets, a schematic frame and components'performance estimation of Ka-band low noise integrated receiving front-end are proposed. Passive circuits of this project, including waveguide connectors, waveguide-microstrip probe transitions and various kinds of microstrip filters, are analyzed theoretically and designed using software simulation in chapter2. Charpter3 is concerned with solid circuits of the project, i.e. low noise amplifiers, power amplifiers, switches and mixers, principles, characteristics and design methods of which are involved. Different function modules are realized using Hybrid Microwave Integrated Circuits(HMICs), incorporating guidelines and technology level. Finally, system integration is achieved by conformity of all function modules. Test data show good agreements with technical requirements.