Subharmonic mixers simplify digital-modulation systems

Article Abstract:

Subharmonic in-phase/quadrature, or I/Q, modulation equipment have applications when the need for overcoming high leakage levels in carriers arises in some instances. The high levels of leakage in carriers are linked to modulation equipment running at millimeter-wave and microwave frequency bands. Subharmonic I/Q modulator users, however, face the need to be careful in their use of the equipment so as to limit the local-oscillator-source-feedthrough-linked second harmonic.

Comment:

Subharmonic in-phase/quadrature modulation equip have applications in overcoming high leakage levels in carriers

Other Electronic Component Manufacturing, Microwave Modulators, Article

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Tracking error sources in HTS filter simulations

Article Abstract:

Electromagnetic (EM) software-simulation tools can model high-frequency structure and electrical phenomena if the user is aware of error sources. This feature enables the method to be calibrated out of a simulation for improved accuracy. The software was applied to evaluate a narrowband high- temperature-superconductor to boost the overall acccuracy of the EM simulation.

Electrical engineering software, Sonnet Software Inc.

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