List of Articles فرکانس بالا Open Access Article Abstract Page Full-Text 1 - Design of One Stage Class F High Power and High Frequency Power Amplifier with Two Parallel GaN Transistor for 2.5GHz Application Bagher Zabihi Peiman Aliparast Naser Nasirzadeh 10.30495/jce.2022.690399 Open Access Article Abstract Page Full-Text 2 - Investigation of the effects of changing physical parameters on the size of the specific adsorption rate in a human head model based on IEC 62209-1 Asma Lak Homayon Oraizi Alireza Malahzadeh Open Access Article Abstract Page Full-Text 3 - Automatic Link Maintenance in HF Radio Networks Through Cognitive Frequency Hopping Technique Masoud Khodaverdizadeh Afrooz Haghbin Farbod Razzazi Open Access Article Abstract Page Full-Text 4 - Portfolio choice with high frequency data: constant relative risk aversion preferences and the liquidity effect mohammad firouzdehghan Hadi Saeidi Shaban Mohammadi ghasem elahi Open Access Article Abstract Page Full-Text 5 - Investigation on the effect of frequency and duty cycle on nano-crystalline TiO2 coatings produced by plasma electrolytic oxidation Hassan Bakhtiari Zamani Ehsan Saebnoori Ali Hassanzadeh Tabrizi Open Access Article Abstract Page Full-Text 6 - Investigation of High Frequency Resistance Welding (HFRW) Variables on microstructure and mechanical properties of dissimilar joints between chromium-molybdenum low alloy steel tubes to chromium high alloy steels MOHAMMAD SADEGHI Hamed Sabet HOSAIEN RASAVI