Development of a frequency-domain electromagnetic scattering measurement system
Oh, Kenneth K.
Morgan, Michael A.
Jenn, David C.
MetadataShow full item record
This thesis describes the development of a system for measuring frequency-domain scattered fields in the Transient Electromagnetic Scattering Range at the Naval Postgraduate School. The new system employs a stepped- frequency Cw waveform and utilizes an HP-8510B network analyzer as an RF front- end and a coherent receiver. A pair of AEL H1498 antennas was installed to cover a frequency range of 2 GHz to 18 GHz. An HP-82300C BASIC Language Processor was installed on a COMPAQ Deskpro-386 PC, and an HP-BASIC program was developed for remote control of the HP-8510B with data acquisition over the HPIB bus. A post- processing algorithm was created using MatLab for background subtraction, calibration, and deconvolution. A set of RCS measurements was made using various size spheres, and the postprocessing outputs were compared to computed values. Good agreement between these measurements and computed data indicates excellent accuracy of the measurement system and valid operations of the postprocessing algorithm.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Active Control of Adaptive Optics System in a Large Segmented Mirror Telescope Nagashima, M.; Agrawal, B.N. (2012);For a large Adaptive Optics (AO) system such as a large Segmented Mirror Telescope (SMT), it is often difficult, although not impossible, to directly apply common Multi-Input Multi-Output (MIMO) controller design methods ...
LASER FREQUENCY STABILIZATION FOR ATOM INTERFEROMETRY APPLICATIONS Gilliam, George N. (Monterey, CA; Naval Postgraduate School, 2021-06);Many atomic sensors depend on using a laser with a precisely defined frequency. Unfortunately, most lasers suffer from perturbations in their effective cavity length (which determines the operating frequency of the laser) ...
A digital automatic frequency control design. Ewing, Glenn Everette (Monterey, California. Naval Postgraduate School, 1976-03);This paper describes a digital automatic frequency control (AFC) system designed for use with almost any conventionally-tuned, high-frequency communications equipment. When connected to a high-quality equipment, such as ...