PHASE SHIFTER

PURPOSE:To attain miniaturization of a phase shifter regardless of the wavelength, by connecting the drain outputs of two D-FETs which perform a phase shift with use of an impedance matching device to obtain an output by using the D-FET in place of a 90 deg. hybrid circuit. CONSTITUTION:A D-FET20 ea...

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Bibliographic Details
Main Author AONO YOSHITAMI
Format Patent
LanguageEnglish
Published 07.11.1983
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
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Summary:PURPOSE:To attain miniaturization of a phase shifter regardless of the wavelength, by connecting the drain outputs of two D-FETs which perform a phase shift with use of an impedance matching device to obtain an output by using the D-FET in place of a 90 deg. hybrid circuit. CONSTITUTION:A D-FET20 earthed to a source is used in place of a 90 deg. hybrid circuit, and a signal is supplied to the 1st gate 32 from an input terminal 30 via a matching circuit 23. The 2nd gate 33 and a drain 34 are connected to the 1st gate of D-FET21 and 22 respectively via matching circuits 24 and 25 respectively. Then a variable bias is supplied to the 2nd gates 28 and 29 of the D-FET21 and 22. Thus a drain output is obtained with about 90 deg. difference of phase and a proper amplitude. The vectors are synthesized through matching circuits 26 and 27 for the above-mentioned drain output. As a result, a joint is defined as an output point 31 to obtain a signal having a phase shift degree corresponding to the variable bias.
Bibliography:Application Number: JP19820072908