Abstract: A wearable glucose monitor may include a compact having an antenna positioned on a housing of the glucose monitor to allow the size of the antenna to be larger than a printed circuit board of the glucose monitor positioned internal to the housing. The antenna may be communicatively coupled to a wireless communication device, such as a transceiver on the PCB, to transmit glucose level measurements to an external device through low-frequency radio signals. In some aspects, the antenna may be configured to be distributed into multiple sections positioned on different sections of the housing and connected to form a complete antenna.

Abstract: A wearable glucose monitor may include a compact having an antenna positioned on a housing of the glucose monitor to allow the size of the antenna to be larger than a printed circuit board of the glucose monitor positioned internal to the housing. The antenna may be communicatively coupled to a wireless communication device, such as a transceiver on the PCB, to transmit glucose level measurements to an external device through low-frequency radio signals. In some aspects, the antenna may be configured to be distributed into multiple sections positioned on different sections of the housing and connected to form a complete antenna.

Abstract: A wearable glucose monitor may include a compact having an antenna positioned on a housing of the glucose monitor to allow the size of the antenna to be larger than a printed circuit board of the glucose monitor positioned internal to the housing. The antenna may be communicatively coupled to a wireless communication device, such as a transceiver on the PCB, to transmit glucose level measurements to an external device through low-frequency radio signals. In some aspects, the antenna may be configured to be distributed into multiple sections positioned on different sections of the housing and connected to form a complete antenna.

Abstract: A wearable glucose monitor may include a compact having an antenna positioned on a housing of the glucose monitor to allow the size of the antenna to be larger than a printed circuit board of the glucose monitor positioned internal to the housing. The antenna may be communicatively coupled to a wireless communication device, such as a transceiver on the PCB, to transmit glucose level measurements to an external device through low-frequency radio signals. In some aspects, the antenna may be configured to be distributed into multiple sections positioned on different sections of the housing and connected to form a complete antenna.

Abstract: The technology described herein relates to auxiliary wakeup for low-power devices. In an implementation, an auxiliary path for waking up a radio frequency (RF) radio of a low-power device is disclosed. The auxiliary path includes peak detector circuitry, pattern detector circuitry and a battery switch. The peak detector circuitry is operable to detect the presence of a RF field at a RF antenna of the low-power device. The pattern detector circuitry is enabled by the presence of a RF field and is operable to detect a time pattern in an amplitude envelope of a wakeup signal received at the RF antenna of the low-power device. The battery switch is operable to connect battery power to a RF radio of the low-power device when the time pattern is detected. Once powered, the RF radio establishes communication with a wakeup device.

Abstract: A multi-antenna device may include a high-frequency antenna, a low-frequency antenna, and a patterned metal ground plane defining channels having capacitors operable a short circuit for the high-frequency antenna and an open-circuit for the low-frequency antenna. The high-frequency antenna, the low-frequency antenna, and the patterned metal ground plane may be coupled to a multi-layer printed circuit board of the multi-antenna device. The channels of the metal ground plane conductor may have dimensions to, themselves, operate as the capacitors. In other aspects, discrete capacitors may be positioned on the metal ground plane proximate to the channels to reduce eddy currents during operation of the low-frequency antenna.

Abstract: The technology described herein relates to auxiliary wakeup for low-power devices. In an implementation, an auxiliary path for waking up a radio frequency (RF) radio of a low-power device is disclosed. The auxiliary path includes peak detector circuitry, pattern detector circuitry and a battery switch. The peak detector circuitry is operable to detect the presence of a RF field at a RF antenna of the low-power device. The pattern detector circuitry is enabled by the presence of a RF field and is operable to detect a time pattern in an amplitude envelope of a wakeup signal received at the RF antenna of the low-power device. The battery switch is operable to connect battery power to a RF radio of the low-power device when the time pattern is detected. Once powered, the RF radio establishes communication with a wakeup device.

Abstract: A wearable glucose monitor may include a compact having an antenna positioned on a housing of the glucose monitor to allow the size of the antenna to be larger than a printed circuit board of the glucose monitor positioned internal to the housing. The antenna may be communicatively coupled to a wireless communication device, such as a transceiver on the PCB, to transmit glucose level measurements to an external device through low-frequency radio signals. In some aspects, the antenna may be configured to be distributed into multiple sections positioned on different sections of the housing and connected to form a complete antenna.

Abstract: A multi-antenna device may include a high-frequency antenna, a low-frequency antenna, and a patterned metal ground plane defining channels having capacitors operable a short circuit for the high-frequency antenna and an open-circuit for the low-frequency antenna. The high-frequency antenna, the low-frequency antenna, and the patterned metal ground plane may be coupled to a multi-layer printed circuit board of the multi-antenna device. The channels of the metal ground plane conductor may have dimensions to, themselves, operate as the capacitors. In other aspects, discrete capacitors may be positioned on the metal ground plane proximate to the channels to reduce eddy currents during operation of the low-frequency antenna.