Implementation of Microwave Active Nulling and Interrogation of Boundary Impedance
Abstract
We have successfully accomplished the research goals set up in the proposal of the program relating to implementation of microwave active nulling. In order to actively manipulate a radiation beam so as to create microwave nulling a reflector surface is deployed upon which the reflection amplitude and phase of the incident wave can be controlled via electronic means. To do this, both the local impedance and phase at various spots of the reflector surface are subject to electronic tuning by imposing a bias voltage and/or a bias current, for example. This allows the local permittivity and permeability of the reflector surface to vary, respectively. Frequency agile materials such as ferroelectric and ferrites are thus needed, and only if both of the ferroelectric and ferrite materials are utilized can the local permittivity and permeability of the reflector surface be simultaneously and independently adjusted.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 2006
- Accession Number
- ADA457759
Entities
People
- Hoton How