Year: 2025
Type: article
Abstract: The equivalent external noise temperature of time-varying (TV) antennas is studied using the concept of cross-frequency effective aperture, which quantifies the intermodulation conversion of external noise across the frequency spectrum into a receiver’s operational bandwidth. The theoretical tools for this approach are laid out following the classical method for describing external noise temperature of linear time-invariant antennas, with generalizations made along the way to capture the effects of TV components or materials. The results demonstrate the specific ways that a TV system’s noise characteristics are dependent on its cross-frequency effective aperture and the broadband noise environment. The general theory is applied to several examples, including abstract models of hypothetical systems, antennas integrated with parametric amplification, and time-modulated arrays (TMAs).
Authors: Kurt Schab, K. C. Kerby-Patel
Institutions: Santa Clara University, University of Massachusetts Boston
Language: English
Topic: Antenna Design and Analysis
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Award: G7489616951
OpenAlex ID: W4408946471