R. Martavičius and A. Jurjevas, “Broadband Microstrip Meander Retard Systems (RS) Properties”, ELEKTRON ELEKTROTECH, vol. 28, no. 5, Sep. 2000, Accessed: Jan. 22, 2026. [Online]. Available: https://eejournal.ktu.lt/index.php/elt/article/view/18274