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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Veröffentlicht in:	IEEE microwave and wireless components letters 2002-12, Vol.12 (12), p.479-481
Hauptverfasser:	LIM, Jong-Sik, LEE, Young-Taek, KIM, Chul-Soo, AHN, Dal, NAM, Sangwook
Format:	Artikel
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	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