Direct quadrature modulator MMIC for future terahertz communications at 300 GHz

Abstract

We present a direct quadrature modulator MMIC based on InP HBTs for generating QPSK signals at 300 GHz. The modulator consists of two single balanced mixers and passive baluns and couplers. In this work, two different transmission line structures - thin-film microstrip lines and inverted microstrip lines - were simultaneously utilized in the single chip for… (More)

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