A vertically periodic defected ground structure and its application in reducing the size of microwave circuits

The microstrip and coplanar waveguide transmission lines combined by a vertically periodic defected ground structure (VPDGS) are proposed. The slow-wave effect, equivalent circuit, and the performances are shown. As an application example, VPDGS is adopted in the matching networks of an amplifier fo...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2002-12, Vol.12 (12), p.479-481
Main Authors: LIM, Jong-Sik, LEE, Young-Taek, KIM, Chul-Soo, AHN, Dal, NAM, Sangwook
Format: Article
Language:English
Subjects:
Amplifiers
Applied sciences
Circuit properties
Coplanar transmission lines
Coplanar waveguides
Distributed parameter circuits
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Equivalent circuits
Exact sciences and technology
Grounds
Impedance matching
Laboratories
Matching
Microstrip
Microstrip lines
Microwave circuits
Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits
Microwaves
Networks
Periodic structures
Planar transmission lines
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Summary:The microstrip and coplanar waveguide transmission lines combined by a vertically periodic defected ground structure (VPDGS) are proposed. The slow-wave effect, equivalent circuit, and the performances are shown. As an application example, VPDGS is adopted in the matching networks of an amplifier for size-reduction. Two series microstrip lines in input and output matching networks of the amplifier are reduced to 38.5% and 44.4% of the original lengths, respectively, due to the increased slow-wave effects, while the amplifier performances are preserved.
ISSN:1531-1309
2771-957X
1558-1764
2771-9588
DOI:10.1109/LMWC.2002.805941