Parametric Downconverter for Mixer-First Receiver Front Ends

Hedayati, Maziar; Yeung, Lap K.; Panahi, Mohammadali; Zou, Xiating; Wang, Yuanxun Ethan

doi:10.1109/tmtt.2021.3058214

Cited by 6 publications

(1 citation statement)

References 37 publications

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“…Using parametric varactors modulation, low-noise and input-matched superheterodyne mixer-first RF front ends have been demonstrated in [11] and [13]. However, in a parametric mixer, both the LO and signal voltages are across the same two terminals of each varactor, resulting in spurious intermodulation signals that are removed using bulky isolators in [11].…”

Section: Introductionmentioning

confidence: 99%

A Passive-Mixer-First Acoustic-Filtering Chipset Using Mixed-Domain Recombination

Seo

Sha

Zhou

2022

IEEE Trans. Microwave Theory Techn.

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A mixer-first acoustic-filtering high-intermediatefrequency (IF) superheterodyne radio frequency (RF) front end is presented, which utilizes a mixed-domain recombination architecture. By having a set of commutated switches or essentially a passive mixer before fixed-frequency acoustic filters, mixer-first acoustic filtering enables a widely tunable RF for the front end while preserving the acoustic filter's high-order filtering response and high linearity. Compared to the prior work that uses IF-only recombination, the proposed IF-and-baseband mixed-domain recombination supports a wider instantaneous bandwidth (BW) and higher RF while reducing the number of IF passive components that are lossy and bulky. A proofof-concept chipset is demonstrated; it consists of an RF frontend N-path commutated-LC passive mixer and an IF in-phase and quadrature (I-Q)-mismatch-compensating complex receiver in 65-nm CMOS as well as two 2.6-GHz Qorvo QPQ1285 bulkacoustic wave (BAW) filters. In measurement, the chipset operates across 3.5-6.5 GHz RF with a 160-MHz instantaneous BW, 10-dB noise figure (NF) at 3.5-GHz RF, and an out-of-band IIP3 of +27 dBm at 1 × BW offset.

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Section: Introductionmentioning

confidence: 99%