A 1.8 W RF output power at 10 GHz and 60 % power conversion efficiency (PCE) at 6 GHz have been achieved using a modified uni-traveling-carrier photodiode flip-chip bonded on diamond.
Pulse oximeters are central to the move toward wearable health monitoring devices and medical electronics either hosted by, e.g., smart phones or physically embedded in their design. This paper presents a small, low-cost pulse oximeter design appropriate for wearable and surface-based applications that also produces quality, unfiltered photo-plethysmograms… (More)
Onboard assessment of photoplethysmogram (PPG) quality could reduce unnecessary data transmission on battery-powered wireless pulse oximeters and improve the viability of the electronic patient records to which these data are stored. These algorithms show promise to increase the intelligence level of former "dumb" medical devices: devices that acquire and… (More)
Modified uni-travelling-carrier (MUTC) photodiodes (PDs) with microwave open and shorted stubs having RF output power (P<sub>RF_out</sub>) of 23 dBm and 21.6 dBm, respectively, at 20 GHz are demonstrated.
Frameworks that promote the intelligent coordination of medical devices are required in ubiquitous health care environments. Such environments are essential to achieve closed-loop behavior, and an emphasis on interoperability standards and reconfigurable hardware/software components will allow these systems to adapt to changing patient/provider needs and… (More)
SUMMARY This paper summarizes recent progress on modified uni-traveling carrier photodiodes that have achieved RF output power levels of 1.8 Watt and 4.4 Watt in continuous wave and pulsed operation, respectively. Flip-chip bonded discrete photodiodes, narrowband photodiodes, and photodiodes integrated with antennas are described.
An analog fiber optic link that employs a high performance photodiode has achieved high gain of 26.4 dB and 26 dB and low noise figure of 6.1 dB and 6.7 dB at 1 GHz and 10 GHz, respectively.
– A cross-course design experience is an efficient way to stitch together two concurrent, single-semester courses to obtain a meaningful number of design credits without unduly increasing a student's overall load. This paper addresses a project that joined the design credits from two Kansas State University (KSU) courses: ECE 773 – Bioinstrumentation Design… (More)
Periodic defected ground structures (PDGS) with rectangular defected areas has excellent low-pass properties when periodic unit amounts and structure sizes meet definite conditions. Microwave low-pass filter (LPF) is a kind of device which can separate different signals within microwave frequency range, widely used in microwave communication system. The… (More)