Memorias de investigación
Communications at congresses:
Influence of the electrical extensions in AlN-BAW resonators for in-liquid biosensors
Year:2014

Research Areas
  • Electronic technology and of the communications

Information
Abstract
High frequency electroacoustic biosensors require the use of microfluidic systems to confine the liquid under test on the sensor surface. Owing to frequent conductive character of biochemical solutions, the contacting pads must be isolated from the active areas of the sensors by means of electrical extensions. At working frequencies in the GHz range, the parasitic effects of such extensions can worsen the overall electrical response of the resonators by dramatically reducing the quality factor at the resonant frequency. In this paper, we study the effects of electrical extensions in AlN-based solidly mounted resonators operating in the shear mode at 1.3 GHz. The design of these extensions as a stretch of coplanar waveguide allows us minimizing the parasitic effects and matching the impedance between the resonator and the external circuitry for excitation and readout. We present solutions to lead the contact pads 2 mm away from the active area without distortion of the resonator response. Resonators with electrical extensions of 1.5 mm and quality factors of more than 150 are obtained.
International
Si
Congress
European frequency and time forum 2014
960
Place
Neuchatel (Suiza)
Reviewers
Si
ISBN/ISSN
978-1-4799-5252-6
Start Date
23/06/2014
End Date
26/06/2014
From page
301
To page
304
Proceedings of the European frequency and time forum 2014
Participants

Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Microsistemas y Materiales Electrónicos
  • Departamento: Ingeniería Electrónica
  • Centro o Instituto I+D+i: Centro de Materiales y Dispositivos Avanzados para Tecnologías de Información y Comunicaciones
  • Departamento: Señales, Sistemas y Radiocomunicaciones