Aerospace Sensor Component and Subsystem Investigation and Innovation-2 Component Exploration and Development (ASCII-2 CED). Delivery Order 0002: Volume 2. Reconfigurable Aperture Antenna Virtual Prototyping (Wideband Lumped Circuit Models for Integrated Spiral Inductors)
Abstract
As the speed of transistors has risen in recent years, acquiring accurate models for the passive devices used in integrated circuits has become a greater challenge. Current device speeds are in the tens of GHz, and at these frequencies the parasitic effects of inductors can become difficult to predict. At GHz level frequencies, monolithic inductors suffer from severe parasitic effects. The relatively large size of the inductor (hundreds of microns), and the high dielectric constant of the substrate, cause the inductor to experience significant capacitive coupling. The skin effect, along with the fields coupling into a lossy substrate, causes the structures to dissipate a significant amount of power. Additionally, the effect of eddy currents must be understood as they too result in power loss. These parasitic effects result in a limited peak Q. Since many RF circuits such as LNA's and VCO's require inductors with a high Q, it is critical for the circuit designer to accurately model these parasitics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2005
- Accession Number
- ADA441950
Entities
People
- Andrew W. Buurma
- Roberto G. Rojas