A New Broadband RF Field Standard Using a Coaxial Transmission Line of Conical Geometry: Progress Report

Published

October 1, 2001

Author(s)

Claude Weil, David R. Novotny, Robert T. Johnk, Arthur Ondrejka

Abstract

We discuss progress in developing a new broadband (10MHz to 40MHz) RF field standard to be used for calibrating small electromagnetic field probes. The technique generates a well-defined and uniform TEM mode field between the conductors of an air-filled coaxial transmission line of conical geometry (termed a "co-conical" line) that is terminated in a well-matched, high-power, distributed load. We show that generation of higher-order mode fields will be minimal due to the line's circular and symmetrical cross-section. Internal field levels equivalent to power density levels in excess of 10mW/cm² can be generated using broadband power sources of only 20 watts output. The new system will be capable of rapid, automated and accurate calibration of small field probes and can realize significant savings in both equipment/facility expenses and operational costs.

Conference Dates

October 21-26, 2001

Conference Location

Denver, CO, USA

Conference Title

Antenna Measurement Techniques Association

Pub Type

Conferences

Keywords

broadband, calibration, field standard, field probes, radio-frequency, transmission line

Citation

Weil, C. , Novotny, D. , Johnk, R. and Ondrejka, A. (2001), A New Broadband RF Field Standard Using a Coaxial Transmission Line of Conical Geometry: Progress Report, Antenna Measurement Techniques Association, Denver, CO, USA (Accessed July 20, 2024)