Design and analysis of a wideband compact LNA-mixer in millimeter wave frequency
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Design and analysis of a wideband compact LNA-mixer in millimeter wave frequency Tahereh Heidari1 • Abdolreza Nabavi1 Received: 4 April 2020 / Revised: 24 September 2020 / Accepted: 14 October 2020 Ó Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract This paper presents the design and analysis of a millimeter-wave LNA-mixer, which adopts a low-noise single-todifferential conversion balun with low phase (gain) imbalance, using a common-source and a common-gate stage. Each stage employs a cascode transistor with inductors in the gate and source for improving noise, gain, and bandwidth performance. A new transformer-based network is proposed for broadband input matching. Also, a transformer network couples between transconductance and switching stage for independent biasing of two stages, which provides passive gain without extra power consumption and further noise reduction. To optimize the size of transistors and their current density, a new figure of merit is utilized which concurrently optimize noise performance, cut-off frequency, and transconductance efficiency. The input frequency range is 27.5–43.5 GHz with typical input signal power of – 40 dBm and a switching signal power of 0dBm, using 0.18 lm CMOS technology. The simulation result shows that typical conversion gain is 24–27 dB, DSB-NF is 5.33–9.1 dB, and third-order intercept point is - 7.83 dBm. The DC power consumption is 11.13 mW with a chip size of 0.45 mm2. Keywords CMOS Millimeter wave frequency Coupled inductor network Gm-boosting LNAM
1 Introduction The millimeter wave (mm-W) frequency provides large bandwidth and is well suited for 5G networks, medical, automotive and satellite applications [1, 2]. CMOS technology has demonstrated the potential for applications at mm-W frequency [3]. However, design at mm-W is subject to several challenges because of the effect of parasitic elements and low quality factor (Q) of passive components. Moreover, the supply voltage shrinks with the technology, making the CMOS design more challenging. Hence, appropriate circuit topologies are required to provide wideband operation in low-voltage low-power applications. This paper deals with the design and simulation of a merged mm-wave LNA-Mixer. Our experiments show that the mm-W design scheme based on a proper EM simulation is successful when compared to measurements [4–6]. & Abdolreza Nabavi [email protected] 1
In particular, the design of low noise amplifier (LNA), VCO and mixer in CMOS, as the most important blocks in the receiver front-end, have been widely studied in the past [3–6]. A low-power merged LNA-mixer was proposed in [3] for 20–30 GHz frequency band, using inductively coupled resonators technique for wideband signal transformation and single-to-differential conversion. An ultra-wideband receiver front-end is proposed for 21–29 GHz frequency band [7], using a two-stage LNA and a double-balanced mixer with marchand balun, which provides broadband response compared to the traditional single-to-differential transformer
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