D.A. Volkova1, M.K. Kutuzov2, V.M. Kolomin3, V.S. Goryaynov4, D.N. Polozov5, V.I. Alekseenkov6, A.L. Kurapova7

1,3–7 JSC "NPP "Istok" named after Shokina" (Fryazino, Russia)

2 LLC "ELMA-PASTE" (Zelenograd, Russia)

3 vmkolomin@istokmw.ru

In this paper, we investigate microwave thermal attenuators based on low-temperature co-fired ceramics (LTCC) and thick-film resistors (thermistors) with positive and negative temperature coefficients of resistance. The thermistors are made on the basis of metallization pastes, which are applied by screen printing on dielectric substrates and then fired in. The thermistor properties are affected by many factors, such as: firing conditions, substrate material, interactions between the elements of the substrate and the resistor, the thickness of the applied layer. In this study, the thermistors are made from a pair of thermistor pastes with negative and positive temperature slopes of resistance, and their manufacturing technology is considered. Microwave thermal attenuators are made on the basis of LTCC technology. The paper presents and discusses the influence of the resistor thickness, pickling operation and interaction with the protective paste on the main characteristics of thermistor pastes. Measurements of the characteristics of microwave thermal attenuators were carried out at frequencies up to 18 GHz, and the dependences of the standing wave ratio and attenuation on frequency under normal conditions, as well as at temperatures from minus 40ºС to plus 85ºС, were considered.

Volkova D.A., Kutuzov M.K., Kolomin V.M., Goryaynov V.S., Polozov D.N., Alekseenkov V.I., Kurapova A.L. Microwave thermoattenuators made of domestic materials for Ku-frequency range. Achievements of modern radioelectronics. 2025. V. 79. № 11. P. 39–46. DOI: https://doi.org/10.18127/j20700784-202511-04 [in Russian]

1. Goryaynov V.S., Kolomin V.M., Semenyuk S.S. i dr. Attenyuatory s peremennym koeffitsientom zatukhaniya iz otechestvennykh materialov. Elektronnaya tekhnika. Ser. 1. SVCh-tekhnika. 2024. V. 2 (562). S. 29–37. [in Russian]
2. Emel'yanov E.V., Kevrukh S.L., Yushchenko A.Yu. Beskorpusnye fiksirovannye SVCh attenyuatory s zadannoy temperaturnoy zavisimost'yu. SVCh-tekhnika i telekommunikatsionnye tekhnologii. 2021. V. 3. S. 169–170. [in Russian]