Real-Time Spectrum Analysis in Microstrip Technology

Author

Laso, M.A.G. ; Lopetegi, T. ; Erro, M.J. ; Castillo, M. ; Benito, D. ; Garde, M.J. ; Muriel, M.A. ; Sorolla, M. ; Guglielmi, M.

Author_Institution

Electrical and Electronic Eng. Dept., Public University of Navarre, Campus ArrosadÃ\xada, E-31006 Pamplona, Spain. Phone: +34 948 169324; Fax: +34 948 169720; e-mail: mario@unavarra.es

fYear

2001

fDate

24-26 Sept. 2001

Firstpage

1

Lastpage

4

Abstract

We report on a time-domain analog to the spatial far-field Fraunhofer diffraction using microstrip lines with chirped distributed Bragg coupling between the fundamental microstrip mode and the same but counter-propagating mode. The chirping of the microstrip impedance yields to linear group delays within the reflected bandwidth. Under the condition of a temporal equivalent of the spatial Fraunhofer inequality, the distortion of a frequency-limited pulse results in an output reflected signal whose complex envelope is, except a phase factor, proportional to the Fourier Transform of the input pulse envelope. This has important temporal applications and, in particular, the devices designed in this paper work as real-time energy spectral density analyzers.

Keywords

Bandwidth; Chirp; Delay lines; Diffraction; Fourier transforms; Frequency; Impedance; Microstrip; Phase distortion; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2001. 31st European

Conference_Location

London, England

Type

conf

DOI

10.1109/EUMA.2001.339009

Filename

4140077