Design guidelines for terahertz mixers and detectors

Twin-slot antennas and coplanar waveguides are a popular choice for coupling signals to state-of-the-art mixers and detectors at terahertz frequencies. Although these sensors show promising performance in terms of noise temperature, they usually also show a considerable downward shift in the center...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2005-05, Vol.53 (5), p.1653-1661
Main Authors: Focardi, P., McGrath, W.R., Neto, A.
Format: Article
Language:English
Subjects:
Antennas
Applied sciences
Bandwidth
Circuit properties
Coplanar waveguide (CPW) lines
Coplanar waveguides
Detectors
Electric, optical and optoelectronic circuits
Electromagnetic measurements
Electromagnetic modeling
Electromagnetic waveguides
Electronic circuits
Electronics
Exact sciences and technology
Frequency measurement
Guidelines
hot electron bolometers (HEBs)
lens antennas
Mathematical models
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Microwaves
Mixers
Noise temperature
Radiocommunications
Signal convertors
slot antennas
Submillimeter wave measurements
Telecommunications
Telecommunications and information theory
Temperature sensors
Terahertz frequencies
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Description
Summary:Twin-slot antennas and coplanar waveguides are a popular choice for coupling signals to state-of-the-art mixers and detectors at terahertz frequencies. Although these sensors show promising performance in terms of noise temperature, they usually also show a considerable downward shift in the center frequency of their spectral response, especially when compared with calculations obtained with commonly used simplified models. In this paper, we describe an accurate and complete electromagnetic model of these detectors, which represents a significant improvement over other published approaches. We present the procedure used to obtain a very good agreement between measurements and calculations at terahertz frequencies both in terms of center frequency and bandwidth. The wide variety of measured and calculated data presented in this paper also demonstrates the effectiveness and reliability of the electromagnetic model in all the investigated frequency bands.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2005.847058