Ka-band analog front-end for software-defined direct conversion receiver

Tatu, Serioja Ovidiu; Moldovan, E.; Wu, Ke; Bosisio, R.G.; Denidni, Tayeb A.

doi:10.1109/tmtt.2005.854181

Cited by 93 publications

(83 citation statements)

References 11 publications

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“…The demodulation results of the circuit have been presented in details in [11]. A snapshot of direct demodulation results of usual PSK/ QAM signals, using the MHMIC multiport circuit previously described, is illustrated in Fig.…”

Section: Multiport Down-conversion and Direct Demodulationmentioning

confidence: 99%

“…By combining (11) and (12) A memory polynomial reverse modeling of the power detector allowing to obtain an estimate of the RF power to the detected voltage in a power detector, is given by: (12) where are the coefficients of the model, is the non-linearity order, and is the memory depth for the diode detector .…”

Section: Joint Calibration and Post-compensation Modelmentioning

confidence: 99%

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Multiport Technology: The New Rise of an Old Concept

et al. 2014

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Abstract-A short review of the multiport (six-port) theory for modern applications in downconversion, direct demodulation or modulation of RF signals, and new measurement techniques for localization is presented in this paper. More than four decades ago, the circuit was developed for low-cost S-parameter measurements of microwave circuits. The modifications required to transform original six-port instrument function to radio function was not obvious in the beginning. In this purpose, several innovations have been implemented during the last two decades. Implementations of the circuit in various mature fabrication technologies, covering frequencies from microwave to millimeter wave spectrum, are presented and discussed. Multiport receiver calibration and impairment mitigation techniques are also proposed at frequencies where analog-to-digital converters and digital signal processing are available.

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Section: Multiport Down-conversion and Direct Demodulationmentioning

confidence: 99%

Section: Joint Calibration and Post-compensation Modelmentioning

confidence: 99%

Multiport Technology: The New Rise of an Old Concept

et al. 2014

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show abstract

“…Two separate antennas are used to reduce the crosstalk between the transmitted and received microwave signals and to simplify the system. Figure 2 shows the block diagram of the six-port junction circuit, composed of a Wilkinson power divider and three 90 • hybrid couplers [18].…”

Section: Operating Principlementioning

confidence: 99%

Calibration of a Six-Port Position Sensor via Support Vector Regression

Peng¹,

Yang²,

Yang³

2012

PIER C

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Abstract-In this paper, a calibration technique for the position sensor via support vector regression (SVR) is proposed. The position sensor adopts a zero-intermediate frequency architecture based on a six-port network, which is used for directly measuring the phase differences and indirectly reflecting the position. The SVR, which implements the structural risk minimization (SRM) principle, provides a good generalization ability from size-limited data sets. The results indicate that the SVR model can achieve a great predictive ability in positioning, with an accuracy of 2.41 mm over a distance range of 274.5 mm.

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“…Figure 1 shows the structure of the sixport junction. It consists of a power divider and three 3-dB quadrature couplers [21].…”

Section: Cicuit Designmentioning

confidence: 99%

“…In the ideal case, the phase differences of two signals can be calculated by using the I/Q amplitudes, and be expressed as follows [21]: …”

Section: Phase Errors Of Six-port Microwave Measurement Systemmentioning

confidence: 99%

Design and Implementation of an Ultra-Wideband Six-Port Network

Peng¹,

Yang²,

Yang³

2012

PIER

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Abstract-This paper presents a six-port network over an ultrawideband (UWB) of 2-8 GHz. Its key component is the six-port junction, which consists of a Wilkinson power divider and three 3-dB quadrature couplers. This six-port junction is accomplished in a low dielectric constant substrate (Rogers RT/duroid 5880). Multi-section impedance transformation is applied in the power divider, and the quadrature coupler is realized by using two 8.34 dB couplers in tandem. An ultra-wideband operation of the six-port junction is verified by full electromagnetic simulations and measurements. The results show that the designed devices exhibit good performance across 2-8 GHz band: the return losses at input ports are higher than 15 dB, the insertion losses from input ports to the remaining ports are 7.2 dB ± 1.7 dB, the isolation between two input ports is greater than 20.5 dB, and the maximum phase difference compared with the theoretical behavior between two test ports is 10 • . For the manufactured six-port junction, a six-port phase measurement system and a calibration technique based on support vector regression (SVR) are introduced. Results show that the SVR model can achieve a mean phase error of 1.5274 • .

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Ka-band analog front-end for software-defined direct conversion receiver

Cited by 93 publications

References 11 publications

Multiport Technology: The New Rise of an Old Concept

Multiport Technology: The New Rise of an Old Concept

Calibration of a Six-Port Position Sensor via Support Vector Regression

Design and Implementation of an Ultra-Wideband Six-Port Network

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