Excitation of a parallel-plate dielectric waveguide using a coaxial probe - Basic characteristics and experiments

Godfrey K C Kwan, Nirod Das

Research output: Contribution to journalArticle

Abstract

In this paper, we study the basic characteristics of a probe excitation to a parallel-plate dielectric waveguide (PPDW), and present design data and experimental results. A coaxial probe has been used in microstrip lines and rectangular waveguides, The present study shows that it is also an effective method to excite/couple a PPDW, thus facilitating the introduction of a new class of PPDW technology in microwave/millimeter-wave integrated circuits. We use here a spectral-domain analysis for analytical modeling of the probe transition, where the probe is approximated by a current strip of an equivalent width. Applying the method of image, the structure is transformed to an infinite-long thin strip inside a dielectric slab, which reduces the transition analysis into a simpler planar geometry. Basic characteristics of the probe excitation, and a complete design data for the radiation loss, excitation efficiency, and input impedance for various transition parameters are computed. Prototype design experiments were conducted, which show that quite efficient excitation can be achieved using the probe, with insertion loss as low as 0.1 dB. This is contrary to some misconceptions that a probe transition to the fundamental PPDW mode is quite inefficient due to parallel-plate mode radiation.

Original languageEnglish (US)
Pages (from-to)1609-1620
Number of pages12
JournalIEEE Transactions on Microwave Theory and Techniques
Volume50
Issue number6
DOIs
StatePublished - Jun 2002

Fingerprint

Dielectric waveguides
dielectric waveguides
parallel plates
probes
excitation
Experiments
strip
Radiation
Rectangular waveguides
rectangular waveguides
experiment design
Microstrip lines
radiation
Insertion losses
Millimeter waves
insertion loss
millimeter waves
integrated circuits
Integrated circuits
slabs

Keywords

  • Coaxial to dielectric waveguide transition
  • Coaxial transition
  • Dielectric waveguide
  • Nonradiative dielectric waveguide

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

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title = "Excitation of a parallel-plate dielectric waveguide using a coaxial probe - Basic characteristics and experiments",
abstract = "In this paper, we study the basic characteristics of a probe excitation to a parallel-plate dielectric waveguide (PPDW), and present design data and experimental results. A coaxial probe has been used in microstrip lines and rectangular waveguides, The present study shows that it is also an effective method to excite/couple a PPDW, thus facilitating the introduction of a new class of PPDW technology in microwave/millimeter-wave integrated circuits. We use here a spectral-domain analysis for analytical modeling of the probe transition, where the probe is approximated by a current strip of an equivalent width. Applying the method of image, the structure is transformed to an infinite-long thin strip inside a dielectric slab, which reduces the transition analysis into a simpler planar geometry. Basic characteristics of the probe excitation, and a complete design data for the radiation loss, excitation efficiency, and input impedance for various transition parameters are computed. Prototype design experiments were conducted, which show that quite efficient excitation can be achieved using the probe, with insertion loss as low as 0.1 dB. This is contrary to some misconceptions that a probe transition to the fundamental PPDW mode is quite inefficient due to parallel-plate mode radiation.",
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AB - In this paper, we study the basic characteristics of a probe excitation to a parallel-plate dielectric waveguide (PPDW), and present design data and experimental results. A coaxial probe has been used in microstrip lines and rectangular waveguides, The present study shows that it is also an effective method to excite/couple a PPDW, thus facilitating the introduction of a new class of PPDW technology in microwave/millimeter-wave integrated circuits. We use here a spectral-domain analysis for analytical modeling of the probe transition, where the probe is approximated by a current strip of an equivalent width. Applying the method of image, the structure is transformed to an infinite-long thin strip inside a dielectric slab, which reduces the transition analysis into a simpler planar geometry. Basic characteristics of the probe excitation, and a complete design data for the radiation loss, excitation efficiency, and input impedance for various transition parameters are computed. Prototype design experiments were conducted, which show that quite efficient excitation can be achieved using the probe, with insertion loss as low as 0.1 dB. This is contrary to some misconceptions that a probe transition to the fundamental PPDW mode is quite inefficient due to parallel-plate mode radiation.

KW - Coaxial to dielectric waveguide transition

KW - Coaxial transition

KW - Dielectric waveguide

KW - Nonradiative dielectric waveguide

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