Design Of The Ka Band LMV Based On0.18um CMOS Technology

The wireless transceiver terminal of the traditional portable devices is often composed of five parts:wave filter, amplifier, mixer, the local oscillator, DAC(or ADC). These five separated parts often cause the relatively large size and high power dissipation of overall design. Meanwhile,the battery development meets the bottleneck, to pursuit longer standby time, people have to increase the capacity of the battery, this will result in the relatively large volume of portable equipment. Therefore, low power consumption, small package becomethe target of designers.In this paper, a combination unit is proposed, which is named LMV (LNA-Mixer-VCO). It is the fusion body of low noise amplifier, mixer and local oscillator. This integration can realize because of the similar circuit structure between the low noise amplifier and mixer, mixer and the voltage controlled oscillator. In the similar parts of the circuit structure, it can realize the components’reuse and circuit integration. LMV not only owns every separated unit’s function, but also reduces the area and power consumption through the current reuse structure. LMV has two types of structures:single balanced structure and double balance structure. Compared with the single balanced structure, the double balanced structure has better isolation characteristics and conversion gain. Comparing to the traditional wireless transceiver terminal, its structure has obvious advantage that can be widely applied in the future.The SMIC0.18um RF CMOS Technology is applied in the design which includes a gate layer and six metal layers. Its applied voltage is up to3.3V. Because the unit is operated at the Ka band(26.5-40GHz), the spiral inductor model in the process no longer available, a transmission line stub inductor will be used to instead the spiral inductor in the design, mixed-matching network must be used to obtain a higher Q in the amplifier input matching network, transmission linestub inductor replaces lumped inductance element, while the lumped parameter elements are still used in other parts. After repeated verification, with the3.3V power supply, the design can achieve excellent performance:circuit gain is up to30dB, the noise factor is less than8dB, IIP3is more than-20dBm, phase noise is less than-120dBc/Hz at1MHz offset of center frequency. While the area is about1.24mm2, the overall power consumption is only about181.5mW. The design meets the original goals.