Due to increase in demand of multiband solution, it is therefore necessary to understand design methodology of multiband transceiver. A typical Monolithic Microwave integrated circuit (MMIC) flow (Bahl, 2005) is normally used in designing MMIC and Radio Frequency Integrated Circuit (RFIC). It has a comprehensive flow starting from defining specification until two-dimensional analysis of layout. Nevertheless, the flow requires many iterations in designing stage, due to uncertainty in layout and parasitic. The design flow does not specifically cater for multiband design. This will be discussed in this chapter. Apart from the design flow, core circuit, LNA, MPA and switch design will be also covered. This is important for ‘First time right IC’ concept.
In designing Monolithic Microwave Integrated Circuit (MMIC) for commercial needs or research endeavor, the knowledge of the current state of the art of current work is important. Nevertheless, one must be cautious not to infringe the design or inventions. This chapter has five main circuits or inventions to be discussed; the VCO, Mixer, LNA, PA and T/R Switch. These five circuits are arranged under different topics for clarity. Multiband and reconfigurable concept is current state of the arts and also future trend for integrated circuit solution to support advanced technology such as 4-G technology.