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Item type:Publication, Access status: without files , Six-Port Receiver Analog Front-End: Multilayer Design and System Simulation(2008-03-08); ; In this paper, a six-port receiver analog front-end structure based on a Wilkinson power divider and three hybrid couplers is presented, which has been implemented in a multilayered, meandered manner, yielding a size reduction of about 78% compared to a planar design. The measured S-parameters of the new design are in good accordance with simulated S-parameters of the planar structure. System simulations with an orthogonal frequency division multiplexing signal show the suitability of the design for six-port communications receivers.Publicationtype: Journal Article66 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Six-port receiver local oscillator power selection for maximum output SNRWith an ideal model of a six-port communications receiver in mind, the optimal local oscillator (LO) power at the diode mixers for maximum signal-to-noise-ratio (SNR) at the baseband outputs is determined by simulations. The simulation setup contains the equivalent circuit for a diode mixer that has been used in a six-port communications receiver demonstrator [1]. By means of noise analysis and one tone harmonic balance simulations the SNR characteristics with respect to the LO power is derived in the presence of diode shot noise, and of diode shot noise combined with LO phase noise. The results show that a properly adjusted LO power is essential for the receiver performance.Publicationtype: Conference Paper71 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Diode power detector DC operating point in six-port communications receiversIn this paper a diode power detector circuit is investigated for application in a six-port communications receiver. The diode behavior is modeled by the fundamental diode equation, which is solved for the output DC operating point applying an expansion theorem of modified Bessel functions for the exponential function. The results are compared with a Harmonic Balance system simulation and the closely matching results show that the assumptions made to find the numerical solution hold true. © 2007 EuMA.Publicationtype: Conference Paper78 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Analysis of system parameters of a six-port communications receiver with analog I/Q regenerationIn this paper system level parameters for the compression behavior as well as second and third order distortions of a six-port communications receiver with analog I/Q regeneration are determined by system simulations. The parameter values are qualified for a range of local oscillator (LO) signal powers. A recommendation for a well-suited LO signal power is derived from the resulting parameter plot. The recommended LO signal power is supported by investigation of the receiver's conversion efficieny. The results are also valid for other ways of I/Q regeneration based on passive mixing.Publicationtype: Conference Paper143 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , A six-port receiver's analog front-end of reduced size based on a multi-layer layout(2007-06); ; In this paper a compact front-end of a six-port receiver is presented based on a multi-layer circuit topology. For higher frequencies the six-port receiver architecture offers a good alternative to common receiver concepts. One drawback is the occupied size of the microwave couplers used in the analog front-end depending normally directly on the wave length and is opposed to an implementation of the passive six-port structure on a MMIC, With the results of the investigations presented in this paper a reduction in size of the six-port's transmission line structure of about 79 % is achievable. The performance of the proposed multi-layer structure is compared to the common planar topology and shows only slight degradation.Publicationtype: Conference Paper98 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , A sixport receiver's analog front-end for the K-band based on a rapid-prototyped PCBWithin the scope of the research project presented in this paper an alternative architecture to mixing based receivers like hetero- or homodyne receivers is investigated: The sixport receiver. The theoretical aspects of the system concept will be shown and the structure of the analog front-end will be presented supported by measurement results. The analog front-end is based on a microwave circuit with a carrier frequency of 24 GHz and constructed as a PCB milled by a circuit board plotter.Publicationtype: Conference Paper103