A fully-integrated reconfigurable dual-band transceiver for short range wireless communication in 180nm CMOS

Abstract

A fully-integrated reconfigurable dual-band transceiver (TRX) is presented for short range wireless communication. The TRX has two independent RF front-ends for each band with a shared analog baseband to achieve optimum power and cost. In Sub-GHz (760-960MHz) band, the maximum 75dBc 3 rd harmonic rejection ratio (HRR) is achieved by inserting a RFA with notch filtering. In 2.4GHz band, a single-ended-todifferential (S2D) RFA with phase and gain error compensation is proposed. By optimizing two bands separately, the RX achieves a NF of 5.1dB and 4.2dB, respectively. A -fractional-N PLL with two switchable Class-C VCOs is employed to provide the LOs. Moreover, the multi-mode CMOS PAs are integrated, which achieve the measured output P1dB (OP1dB) of 16.3dBm and 14.8dBm with 25% PAE for Sub-GHz and 2.4GHz bands. Furthermore, to optimize the PA's back-off efficiency, the powercontrol loop is proposed to detect the input signal PAPR in real time and flexibly reconfigure the PA's operation modes. With this proposed technique, the PAE in Sub-GHz band is improved by ×3.24 and ×1.41 at 9dB and 3dB back-off powers. In 2.4GHz band, the PAE is improved by ×2.17 at 6dB back-off power. The measured results have demonstrated that this presented transceiver has achieved comparable or even better performance in terms of noise, HRR, OP1dB and power efficiency compared with the-state-of-the-arts.I.

A Fully-Integrated Reconfigurable Dual-Band Transceiver for Short Range Wireless Communications in 180 nm CMOS

“…Fig. 1 shows the block diagram of the proposed reconfigurable dual-band transceiver [22], where two individually-optimized RF front-ends and one shared power-scalable analog baseband are employed to address the design challenges in Sub-GHz and 2.4GHz bands while minimizing the area overhead. The receiver can be configured into Zero-IF architecture for wideband applications (BW=10MHz) to reduce the power or Low-IF architecture for narrowband applications (fIF=3MHz, BW=1MHz/2MHz) to avoid the performance degradation caused by 1/f noise and DC offsets, and the transmitter adopts the direct up-conversion architecture.…”

Design of RF Receiver Front end Subsystems with Low Noise Amplifier and Active Mixer for Intelligent Transportation Systems Application

“…Implementing Intelligent Traffic Control System for Congestion Control has been described 23 . The different development of active integrated circuit mixer for wireless transmitter application has been reported in the context of vehicular communication and ITS [24][25][26][27] . The problems of choice of road route under conditions of uncertainty which drivers are faced with as they carry out their task of transportation have been described 28 .…”