Journal
ELECTRONICS LETTERS
Volume 46, Issue 6, Pages 423-U64Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/el.2010.3053
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Funding
- NIPA (National IT Industry Promotion Agency) [NIPA-2009-C1090-0903-0007]
- MKE
- Korea Industrial Technology Foundation (KOTEF)
- National Research Foundation of Korea [핵06B1809] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A short-wavelength transmission line with variable characteristic impedance (STLVCI) employing periodically loaded diodes is proposed. Compared with the conventional transmission line, the STLVCI shows a much shorter wavelength, and the characteristic impedance of the VATL is easily controlled by changing only the supplied voltage. Using the STLVCI, a lambda/4 impedance transformer has been fabricated on a GaAs MMIC, and its line length is 375 mm, which is 28.3% of that of the conventional impedance transformer. Using the lambda/4 impedance transformer, impedance matching could be performed between RF components with various characteristic impedance of 30-100 V by adjusting the applied voltage.
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