The Calibration and Performance of a Microstrip Six-Port Rdlectometer

El-Deeb, N.A.

doi:10.1109/tmtt.1983.1131538

Cited by 15 publications

(3 citation statements)

References 9 publications

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“…En los ochenta no hubo grandes actualizaciones en el tema, no obstante, se realizaron publicaciones relacionadas con el análisis de la técnica, simplificaciones matemáticas y nuevos diseños de las estructuras hexaportales, como por ejemplo, lo descrito en los trabajos de Riblet en 1981 [19], Dobrowolsky 1982 [20] y El-Deeb en 1983 [21]. Los años siguientes, durante y después de la década de los noventa, los trabajos se centraban principalmente en optimizar las técnicas de automatización con equipos digitales [22], la implementación de las redes hexaportales en otras aplicaciones fuera de las mediciones de parámetros de microondas [23] y en la difusión de la reflectometría hexaportal para la enseñanza y la Investigación [24].…”

Section: Historia Y Desarrollo De La Reflectometríaunclassified

Los hexapuertos y la reflectometría, fundamentos y aplicaciones

Veliz

Navarro

Barragán

et al. 2019

recibe

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En este artículo se presenta el modelo matemático base de la reflectometría hexaportal. Con una intención didáctica, se explica brevemente la historia de la reflectometría hexaportal y enseguida se detallan a cabalidad todas sus ecuaciones fundamentales. Posteriormente se presentan algunas estructuras hexaportales muy utilizadas, se elige una y se analizan sus características. Se presentan algunas aplicaciones de las redes hexaportales y sus diversas aplicaciones actuales. Con base en el material investigado se confirma que la reflectometría es un área con gran potencial en múltiples aplicaciones actuales, incluyendo su aportación en la docencia de las microondas.

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Section: Historia Y Desarrollo De La Reflectometríaunclassified

Los hexapuertos y la reflectometría, fundamentos y aplicaciones

Veliz

Navarro

Barragán

et al. 2019

recibe

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“…Then, other coupled line can be used for reverse signal detection and same technique can be applied to improve the directivity. The use of three-line microstrip couplers as reflectometers are discussed in [29,30]. However, the design of three-line microstrip directional couplers in the literature again is based on the use of odd and even mode impedance design charts or numerical analysis techniques as outlined in [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Design of Multilayer and Multiline Microstrip Directional Coupler With Closed Form Relations

Eroğlu¹,

Rönnow²

2018

PIER C

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Abstract-Design, simulation, implementation and measurement results of multiline and multilayer microstrip directional couplers are given with closed form relations.Step-by-step design procedure reflecting the design practice of directional couplers, which requires only information on coupling level, port impedances and operational frequency, is presented. The method based on the synthesis technique applied in the design of conventional two-line microstrip symmetrical directional couplers is adapted to design multilayer directional couplers with the aid of electromagnetic simulators using parametric analysis with curve fitting method. The proposed design method is compared with the measurement results and accuracy is verified. It has been also shown that the directivity of the couplers designed using the multilayer structure is improved significantly. A method such as the one presented in this paper can be used to design multilayer two-line and three-line directional couplers which can be integrated to the front end of an RFID systems to provide the required isolation between transmitter and receiver and prevent signal leakage due to use of conventional circulators.

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“…respectively, and ai L e same time the power readings at ports 3 and 4 recorded for thc tluee diirerent values of p . The calibration constants calculated by using the calibration procedure of [3][4][5]. The realized system was used to measure Werent unlaiown terminations and the same unknowns measured using vector network analyzer (HP 85lOC) at NIS.…”

Section: Eighteesth Satioxal~r4dio Science Cosf'erescementioning

confidence: 99%

Six-port reflectometer realization using two microstrip three-section couplers

Mohra

Proceedings of the Eighteenth National Radio Science Conference. NRSC'2001 (IEEE Cat. No.01EX462)

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The single-section couplers are narrow band devices, so in order to.. broadcn the useful bandwidth, three-section couplers are used. In this papcr a system of two of three-section couplers is used to construct a six-port reflectometer. The realized six-port reflectometer is calibrated and used to measure different unknown complex terminations. The results of thc sixport reflectometer is found to Le in good agreement with the measurements of the vector network analyzer (HP-85 1OC) with an error not exceeding 4% iii magnitude and 4' in phase in the frequency range (2.4-4.4GHZ). 1.IntroductionThe three-section coupler is a tliree-quaner wavelength coupler. Tlic analysis is simplified somewhat when one recognizes dwt the coupler is analytically similar to the quarter-wave transformer [ 1-21. Another way of the analysis of the three-section coupler is carried out by taking the advantages of the four fold symmetries of the slructures. Fig.1. and the even and odd mode escitations technique [3]. A six port reflectometer is analyzed and designed by using two of the prescribed three-section coupler. The system w a s first simulated by ready-made software package and then fabricated and tested. The measured S-parameters gave good agreement with the theoretical one. The sis-port was calibrated with a matched load and tliree positions of a sliding short circuit [ I ] in order to obtain the calibration constants. 2.Analysis and Design of a Three-Section CouplerEscitations are chosen [3] so that the symmetry plane aa. Fig. 1, corresponds to an electric wall (short circuit) or a magnetic wall (open circuit). The Same is done for the case of symmetry plane bb corresponding to an electric or iiiagnetic wall. When bb corresponds to an electric wall, tire mode of propagation on tlrc coupled lines is the odd mode that has a cliaracteristic impedance Zoo and propagation constant Po. When bb corresponds to a magnetic wall, the mode of propagation is the even mode that has a characteristic impedance Z , , and propagation constant pe. The propagation constants are different because the medium is nonhomogeneous. By considering the four different escitations for the three-scction coupler and after some derivations the transmission and coupling parameters are [3]:

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The Calibration and Performance of a Microstrip Six-Port Rdlectometer

Cited by 15 publications

References 9 publications

Los hexapuertos y la reflectometría, fundamentos y aplicaciones

Los hexapuertos y la reflectometría, fundamentos y aplicaciones

Design of Multilayer and Multiline Microstrip Directional Coupler With Closed Form Relations

Six-port reflectometer realization using two microstrip three-section couplers

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