The ambiguity of frequency determination in digital microwave frequency discriminators

• Autorzy: Stadnik, Hubert , Stec, Bronisław
• Języki publikacji: EN

Abstrakty

EN

Instantaneous frequency measurement devices are designated for very fast measurements of the current frequency value of microwave signals, even if they are very short in the time domain. Fast measurements of frequency temporary values may be based on the evaluation of the phase difference of signal propagating through the microwave transmission lines with unequal, but known, lengths. This paper presents the principle of determination of temporary values of the microwave signal frequency using the digitalized signals and the binary value of them eventually. In the purpose of increase the frequency discrimination resolution, additional tracks with lines with a larger length are proposed. For the system with elements with analytical model transmission characteristics it is typical that bands of ambiguity of frequency measurement occurs. To tackle this problem in addition to 4 x 4 Butler matrix implementation the method of using combination sine and cosine signals is proposed.

Słowa kluczowe

EN

microwave frequency discriminator; microwave phase discriminator; instantaneous frequency measurement; ambiguity of frequency determination

• Czasopismo: International Journal of Electronics and Telecommunications
• Rocznik: 2024
• Tom: Vol. 70, No. 2
• Strony: 437--442
• Opis fizyczny: Bibliogr. 10 poz., rys., wykr.

Twórcy

autor

Stadnik, Hubert

• Polish Air Force University, Faculty of Aviation, Dęblin, Poland,

autor

Stec, Bronisław

• Military University of Technology, Faculty of Electronics, Institute of Radioelectronics, Warsaw, Poland,

Bibliografia

• [1] Stec B. (1980). Broadband homodyne system for measuring microwave circuits. Proceedings of the MESC, Gdańsk (in Polish).
• [2] Stec B. (1985). Microwave phase discriminator. Bulletin Military University of Technology vol. 392, Warszawa, (in Polish).
• [3] Smólski B. (1980). Analysis and synthesis of instantaneous frequency measurement systems. The Supplement to the Bulletin of Military University of Technology No. 8, Warszawa (in Polish).
• [4] Rutkowski A., Stec B. (1998). A Planar Microwave Frequency Discriminator. Proceedings of the 12th International Conference on Microwaves and Radar, MIKON-98, (IEEE Cat. No.98EX195), Kraków. https://doi.org/10.1109/MIKON.1998.740805.
• [5] East P.W. (2012). Fifty years of instantaneous frequency measurement. IET Radar, Sonar & Navigation Vol. 6, Issue 2, 2012, pp. 112-122. https://doi.org/10.1049/iet-rsn.2011.0177.
• [6] Rutkowski A. (1990). Analysis of microwave phase and frequency discriminators with analog and digital processing of output voltages. [Doctoral dissertation, Military University of Technology, Warszawa] (in Polish).
• [7] Stec B., Rećko C. (2006). Ambiguity in determining the frequency of the ring frequency discriminator. Bulletin Military University of Technology, No. 1, Warszawa (in Polish).
• [8] Wincza K., Gruszczyński S. (2012). Miniaturized Broadband 4 x 4 Butler Matrix Designed with the Use of Quasi-Lumped Coupled-Line Couplers. 8th International Caribbean Conference on Devices, Circuits and Systems (ICCDCS). Playa del Carmen, Mexico. https://doi.org/10.1109/MRRS.2011.6053615.
• [9] Wincza K., Gruszczyński S., Sachse K. (2011). Ultrabroadband 4 x 4 Butler Matrix with the Use of Multisection Coupled-line Directional Couplers and Phase Shifters. Microwaves, Radar And Remote Sensing Symposium. Kiev, Ukraine. https://doi.org/10.1109/MRRS.2011.6053615.
• [10] Stadnik H., Stec B. (2020). Microwave frequency detector using a 4x4 Butler matrix. SPIE Proceedings Volume 11442, USA. https://doi.org/10.1117/12.2565293.

Identyfikatory

DOI

10.24425/ijet.2024.149563