An Efficient 2.4 GHz Six-port Circuit Design to implement a Reflectometer
Keywords:
Reflection coefficient measurement, six-port circuit, six-port reflectometer, six-port measurement technique, microstrip couplerAbstract
An efficient and simple design of a 2.4 GHz six-port circuit for a reflectometer is analyzed and presented. This circuit matches with the ideal q-points symmetrical distribution of the Engen's criteria, implemented with only two microstrip power dividers. The first is a 90° directional hybrid coupler and the second is a symmetrical five-port junction. This six-port configuration has a single sided microstrip structure formed with basic regular geometric figures, avoiding the use of additional elements into the circuit. The design and theoretical basis here presented, simplifies the process of implementing a six-port reflectometer, as a great alternative for measuring high frequency signals. The six-port design is an intricate technical task for those who want to implement this measuring instrument.
Downloads
References
G. F. Engen, ”The Six-Port Reflectometer: An Alternative Network Analyzer,¨IEEE Transactions on Microwave Theory and Techniques. vol. 25, no. 12, pp. 1075-1080, Dec. 1977.
C. A. Hoer, .A Network Analyzer Incorporating Two Six-Port Reflectometers, ¨IEEE Transactions on Microwave Theory and Techniques, vol. 25, no. 12, pp. 1070-1074, Dec. 1977.
J. Mart´ınez Moreno, A. S. Medina V´azquez, C. A. Bonilla Barrag´an, J. M. Villegas Gonz´alez and J. C. Aldaz Rosas, Radio Frequency Energy Harvesting System Making Use of 180° Hybrid Couplers and Multiple Antennas to Improve the DC Output Voltage,¨ın IEEE Latin America Transactions, vol. 18, no. 03, pp. 604-612, March 2020.
S. Linz, F. Lurz, R. Weigel and A. Koelpin, ”Squircle-Based Calibration Algorithm for Six-Port Radar,¨IEEE Transactions on Microwave Theory and Techniques, vol. 67, no. 10, pp. 4023-4030, Oct. 2019.
S. Linz, F. Lurz, R. Weigel and A. Koelpin, .Extended Ellipse-based Reconstruction Algorithm for Six-port Radar,”2019 IEEE Radio and Wireless Symposium (RWS), Orlando, FL, USA, 2019, pp. 1-3.
F. M. Ghannouchi and R. G. Bosisio, ”Measurement of microwave permittivity using a six-port reflectometer with an open-ended coaxial line,¨IEEE Transactions on Instrumentation and Measurement, vol. 38, no. 2, pp. 505-508, April 1989.
S. Somwong, P. Wounchoum, M. Chongcheawchamnan, “Contamination detection in fresh natural rubber latex by a dry rubber content measurement system using microwave reflectometer,” Biosystems Engineering, 2017, vol. 164, pp. 181-188.
P. Feng and S. Yan, ”Design of Frequency Compensated Six-Port Junction and its Application in Microfluidic Sensing,”2021 International Conference on Microwave and Millimeter Wave Technology (ICMMT), Nanjing, China, 2021, pp. 1-3.
S. Julrat and S. Trabelsi, ”Portable Six-Port Reflectometer for Determining Moisture Content of Biomass Material,¨ın IEEE Sensors Journal, vol. 17, no. 15, pp. 4814-4819, 1 Aug.1, 2017.
K. Staszek, I. Piekarz, J. Sorocki, S. Koryciak, K. Wincza and S. Gruszczynski, ”Low-Cost Microwave Vector System for Liquid Properties Monitoring,¨ın IEEE Transactions on Industrial Electronics, vol. 65, no. 2, pp. 1665-1674, Feb. 2018.
M. Hofmann, G. Fischer, R. Weigel and D. Kissinger, ”Microwave- Based Noninvasive Concentration Measurements for Biomedical Applications, ¨IEEE Transactions on Microwave Theory and Techniques, vol. 61, no. 5, pp. 2195-2204, May 2013.
G. Vinci et al., ”Six-Port Radar Sensor for Remote Respiration Rate and Heartbeat Vital-Sign Monitoring,¨IEEE Transactions on Microwave Theory and Techniques, vol. 61, no. 5, pp. 2093-2100, May 2013.
S. Julrat and S. Trabelsi, ”Portable Six-Port Reflectometer for Determining Moisture Content of Biomass Material,¨ın IEEE Sensors Journal, vol. 17, no. 15, pp. 4814-4819, 1 Aug.1, 2017.
H. Arab, L. Chioukh, M. Dashti Ardakani, S. Dufour and S. O. Tatu, Early-Stage Detection of Melanoma Skin Cancer Using Contactless Millimeter-Wave Sensors,¨ın IEEE Sensors Journal, vol. 20, no. 13, pp. 7310-7317, 1 July1, 2020.
Kamil Staszek, ¨Investigation on Optimum Parameters of Six-Port Reflectometers, ¨International Journal of Information and Electronics Engineering vol. 9, no. 1, pp. 30-33, 2019.
G. F. Engen, .An Improved Circuit for Implementing the Six-Port Technique of Microwave Measurements,¨IEEE Transactions on Microwave Theory and Techniques, vol. 25, no. 12, pp. 1080-1083, Dec. 1977.
K. Staszek, S. Gruszczynski and K. Wincza, “Six-Port Reflectometer Providing Enhanced Power Distribution,” IEEE Transactions on Microwave Theory and Techniques, vol. 64, no. 3, pp. 939-951, March 2016.
K. Staszek, S. Gruszczynski and K. Wincza, ”Theoretical Limits and Accuracy Improvement of Reflection-Coefficient Measurements in Six-Port Reflectometers,¨IEEE Transactions on Microwave Theory and Techniques. vol. 61, no. 8, pp. 2966-2974, Aug. 2013.
J. J. Yao and S. P. Yeo, “Six-Port Reflectometer Based on Modified Hybrid Couplers,” IEEE Transactions on Microwave Theory and Techniques, vol. 56, no. 2, pp. 493-498, Feb. 2008.
A. Hassan, O. Abbas, “Design of a wide band six port reflectometer using broadside coupled lines,” Microwave and optical technology letters, 2018, vol. 60, Issue 9, pp. 2101-2103.
K. Staszek, “Balanced six-port reflectometer with nonmatched power detectors,” IEEE Trans. Microw. Theory Techn., vol. 69, no. 11, pp. 4869–4878, Nov. 2021.
G. P. Riblet and E. R. B. Hansson, ”The Use of a Matched Symmetrical Five-Port Junction to Make Six-Port Measurements,”1981 IEEE MTT-S International Microwave Symposium Digest, 1981.
A. D. Jimenez, ”Lumped- and distributed-element equivalent circuits for some symmetrical multiport signal-separation structures, ¨IEEE Transactions on Microwave Theory and Techniques, vol. 45, no. 9, pp. 1537-1544, Sept. 1997.
R. Sinha, ”Design of Multi-Port With Desired Reference Impedances Using Y-Matrix and Matching Networks,¨ın IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 68, no. 5, pp. 2096-2106, May
K. Staszek, S. Gruszczynski and K. Wincza, ”Measurement Accuracy Enhancement in Six-Port Reflectometers,¨IEEE Microwave and Wireless Components Letters, vol. 25, no. 8, pp. 553-555, Aug. 2015.
K. Staszek, ”Six-Port Calibration Utilizing Matched Load and Unknown Calibration Loads,¨IEEE Transactions on Microwave Theory and Techniques, vol. 66, no. 10, pp. 4617-4626, Oct. 2018.