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本文提出了一种混合耦合器优先的5GHz噪声消除双模接收机，通过结合电流模式和混频器优先架构的优势，解决了sub-6GHz应用中带内线性度与噪声系数之间的折衷问题。该接收机在电流模式下实现了+10dBm的带内IIP3和1.7dB的噪声系数。
out-of-band(OOB) linearity for sub-6GHz applications [1-3]. To achieve high linearity, one solution is to utilize current-mode direct conversion [1]. In this architecture, the low-noise amplifier (LNA) acts as a transconductor, which avoids large voltage gain, thus achieving high linearity. Another solution is to employ mixer-first architecture [2,3]. This kind of receiver starts with a passive mixer, which avoids any possible voltage gain brought by the LNA and shows improved tolerance to the blockers. However, unlike the current-mode architecture, its transimpedance-amplifier (TIA) input is not a virtual ground, but a highimpedance node, for input matching purpose [2]. Meanwhile, to achieve better NF, noise-cancellation techniques are widely used in different architectures to improve the
Kaituo Yang, Chirn Chye Boon, Zhe Liu, Jiaming Piao, Ting Guo, Yangtao Dong,
Chenyang Li, Ao Zhou, Zhijie Yang, Xiaoying Wang, Yufeng Liu Nanyang Technological University, Singapore, Singapore Recently, there is an increasing demand for better in-band(IB) and