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In this paper, the performance of a twin-slot antenna coupled NbN superconducting HEB mixer based on a new device fabrication process is thoroughly investigated. The measured lowest double-sideband receiver noise temperature is about 600 K at 1.3 THz, and reduced to 300 K after eliminating all the quasi-optical losses. The spectral response of the HEB mixer is characterized by a Fourier Transform...
A novel technique which combines the ultra-wide band characteristic basis function method (UCBFM) and the adaptive multi-point expansion algorithm for asymptotic waveform evaluation (AWE) method is proposed. The UCBFM and the AWE method are two kinds of model order reduction (MOR) methods, and their proposed combination can be applied for fast evaluation of wide band scattering problems. In the proposed...
EFIE (electric field integral equation) suffers from internal resonance, and the remedy is to use MFIE (magnetic field integral equation) to come up with a CFIE (combined field integral equation) to remove the internal resonance problem. However, MFIE is fundamentally a very different integral equation from EFIE. Many questions have been raised about the differences.
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