Spectral characterization of broadband THz antennas by photoconductive mixing: toward optimal antenna design

The spectral characterization of a broadband antenna using a pump-probe photomixing continuous-wave (CW) terahertz (THz) system is presented. The high dynamic range of the system, comparable to or better than that of similar pump-probe systems reported in the literature, provides an accurate means o...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2005, Vol.4, p.85-88
Main Authors: Mendis, R., Sydlo, C., Sigmund, J., Feiginov, M., Meissner, P., Hartnagel, H.L.
Format: Article
Language:English
Subjects:
Antennas
Antennas and propagation
Bow-tie antenna
Broadband
Broadband antennas
Dynamic range
Dynamical systems
Dynamics
Frequency response
Geometrical optics
Geometry
High frequencies
log-periodic antenna
Optical pulse shaping
Optimization
Photoconductivity
photomixing
Resonance
Spectra
Spectroscopy
Teeth
terahertz (THz)
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Description
Summary:The spectral characterization of a broadband antenna using a pump-probe photomixing continuous-wave (CW) terahertz (THz) system is presented. The high dynamic range of the system, comparable to or better than that of similar pump-probe systems reported in the literature, provides an accurate means of antenna characterization. The planar antenna exhibits a log-periodic behavior at low frequencies, a bow-tie behavior at high frequencies, and a resonance characteristic in between, well in agreement with the antenna geometry. It is predicted that an improved geometry that extends the log-periodic behavior to higher frequencies would contribute significantly in enhancing the broadband performance of antenna-coupled photomixers.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2005.844650