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A new SPDR design approach is proposed. The receiver contains an RF discriminator, power detectors, a signal level comparison circuit, a decoder, and data and carrier recovery circuits for BPSK and QPSK signals. The new receiver operates solely on analog circuits, and the proposed design is validated with circuit and system simulations of an RF discriminator and a Costas-type phase-locked loop, demonstration of a demodulator at 2.4 GHz, and MMIC fabrication of an RF discriminator at 15 GHz. The new design approach offers interesting possibilities to achieve SPDR-on-a-chip. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 25: 356–360, 2000. [ABSTRACT FROM AUTHOR]

In this paper, a four-port digital millimetric receiver (FP/DMR) is studied in detail. The FP/DMR is achieved by eliminating one of the output ports and the reference port of an ordinary six-port junction in the digital millimetric receiver proposed earlier. This paper provides the principle of operation of FP/DMR, its real time or “on-line” calibration methods, and a comparison with a traditional quadrature I/Q receiver. The principle of operation of the FP/DMR can also be used at lower frequencies (e.g., in the L-band) whenever mass-market applications demand the lowest possible receiver costs. ©1999 John Wiley & Sons, Inc. Microwave Opt Technol Lett 22: 350–355, 1999 [ABSTRACT FROM AUTHOR]

In this paper, the nonlinear cross-modulation noise/interference arising from channel filtering and leakage in a six-port digital millimetric receiver (DMR) is studied in detail. The in-band noise/interference arises from strong noise/interference outside the receiving bandwidth, and will deteriorate the bit-error rate (BER). Analysis and simulation results of this effect are provided, and results on methods of its suppression are also given. © 1998 John Wiley & Sons, Inc. Microwave Opt Technol Lett 17: 386–394, 1998. [ABSTRACT FROM AUTHOR]