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An efficient reference-based adaptive antenna impedance matching CMOS circuit

Robichaud, Alexandre et Nabki, Frédéric et Deslandes, Dominic. 2016. « An efficient reference-based adaptive antenna impedance matching CMOS circuit ». In IEEE International Symposium on circuits and systems (ISCAS) (Montreal, QC, Canada, May 22-25, 2016), p. 1402-1405. IEEE.

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Résumé

This paper presents a simple integrated reference based adaptive matching network capable of undertaking real time antenna tuning for applications such as wearable wireless sensors. The signal sent to the antenna is compared to a reference signal using a single flip-flop acting as a phase detector. In case of an impedance mismatch, a counter controlling a capacitor bank is activated reducing the sensed mismatch. The system is capable of three modes: calibration, matching and operation. The calibration mode ensures that the reference signal is in phase with the signal sent to the antenna when the impedance of the antenna is 50 Ω. In matching mode, the capacitor bank is adjusted to maintain antenna matching. In operation mode, the circuit is shut off allowing for low power consumption (85 nW while matching every 1 ms). The circuit is able to provide a VSWR <; 2 over a wide range of antenna impedance levels. It is designed in CMOS 0.13 μm technology.

Type de document: Compte rendu de conférence
Professeur:
Professeur
Nabki, Frédéric
Deslandes, Dominic
Affiliation: Autres
Date de dépôt: 13 juill. 2016 18:01
Dernière modification: 15 déc. 2016 21:55
URI: http://espace2.etsmtl.ca/id/eprint/13241

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