Idea of six-port vector-voltmeter with homodyne phase-sensitive detectors

Galwas, B.A.; Palczewski, S.

doi:10.1109/imtc.1992.245113

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…However, it is not suited to use in some fields, such as the six-port junction [13][14][15] including non-coplanar couplers [16][17][18]. In addition, the six-port technique is a suitable option as the ratio of complex amplitude measurements [19], and has been applied in many fields [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

An Improved Uwb Non-Coplanar Power Divider

Peng¹,

Yang²,

Liu³

et al. 2013

PIER

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Section: Introductionmentioning

confidence: 99%

An Improved Uwb Non-Coplanar Power Divider

Peng¹,

Yang²,

Liu³

et al. 2013

PIER

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“…The six-port technique was demonstrated to be a suitable option as the ratio of complex amplitude measurements in [2][3][4]. Many microwave applications directly or indirectly require the determination of phase differences between two input microwave signals over a specified frequency band, such as microwave vector network analyzers (VNA) [5], direction finding [6,7], position sensors [8], frequency measurement [9], digital signal demodulation [10], and other applications [11][12][13][14][15][16].…”

Section: Introductionmentioning

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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“…An earlier study about the six-port technique was proposed in 1972 by Hoer [1]. Galwas and Palczewski later published a series of papers on the ratio of complex amplitude measurements obtained by a six-port reflectometer [2,3]. Several studies on the demodulation of modulated digital signals by six-port receivers are currently available [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Calibration of a Six-Port Receiver for Direction Finding Using the Artificial Neural Network Technique

Peng¹,

Yang²,

Yang³

2011

PIER Letters

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Because of the asymmetry of six-port junctions and the nonlinearity of diode detectors, the calibration of direction finding receivers have to be carefully considered. It is generally believed that an efficient tool for numerical approximations, the artificial neural network (ANN), may be used for such calibrations. In this paper, a new calibration technique based on the ANN is proposed for direction finding receivers at a bandwidth of 1 GHz. The direction finding system adopts a zero-intermediate frequency receiver architecture, which offers the advantage of fast response times. The key modules of this receiver consist of two six-port networks used to measure phase differences and operating frequencies. The results indicate that the calibration technique achieves a high accuracy of 0.192 • .

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Idea of six-port vector-voltmeter with homodyne phase-sensitive detectors

Cited by 6 publications

References 9 publications

An Improved Uwb Non-Coplanar Power Divider

An Improved Uwb Non-Coplanar Power Divider

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

Calibration of a Six-Port Receiver for Direction Finding Using the Artificial Neural Network Technique

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