Millimeter-scale bluetooth low energy transmitter with dual purpose loop antenna

A millimeter-scale Bluetooth low energy wireless transmitter is presented with a dual purpose loop antenna. The oscillator employs a high quality factor resonator formed by a printed 3.5×3.5 mm2 inductive loop antenna (simulated Q˜110) and an on-chip digitally-switched capacitor array (simulated Q˜2...

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Bibliographische Detailangaben
Hauptverfasser:	Blaauw, David T, Wentzloff, David D, Shi, Yao
Format:	Patent
Sprache:	eng
Schlagworte:	ANTENNAS, i.e. RADIO AERIALS AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRIC ELEMENTS BASIC ELECTRONIC CIRCUITRY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY GENERATION OF NOISE BY SUCH CIRCUITS GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER TRANSMISSION
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Beschreibung
Zusammenfassung:	A millimeter-scale Bluetooth low energy wireless transmitter is presented with a dual purpose loop antenna. The oscillator employs a high quality factor resonator formed by a printed 3.5×3.5 mm2 inductive loop antenna (simulated Q˜110) and an on-chip digitally-switched capacitor array (simulated Q˜283). The oscillator replaces the traditional voltage controlled oscillator plus power amplifier, achieving lower power consumption while maintaining phase noise of −118.5 dBc/Hz at 1 MHz offset that results in low FSK modulation error (2.1%) and low frequency drift during BLE packet transmission.