A set of waveguide primary thermal noise standards and related calibration systems for the frequency range 8.2-40 GHz. - Joseph Achkar (IEEE Trans. Instrum. Meas., 1999)

International comparison of power measurements at 33 GHz (GT-RF/92-4). - Joseph Achkar; Laurent Velasco; M. P. Weidman; Richard F. Clark; Jeong-Hwan Kim; Jeong-Il Park; Tieren Zhang; John E. Peters; Jürgen Rühaak; Dieter Stumpe; Jan P. M. de Vreede; A. M. Wallace (IEEE Trans. Instrum. Meas., 1999)

International comparison of thermal noise-temperature measurements at 2, 4, and 12 GHz. - James P. Randa; Joseph Achkar; Friedrich-Immanuel Buchholz; Thierry Colard; John Rice; Dirk Schubert; M. Sinclair; Gareth L. Williams (IEEE Trans. Instrum. Meas., 1999)

The GT-RF/95-1 key comparison of power measurements at 62 GHz. - Joseph Achkar; Bernard Mellouet; Laurent Velasco; S. Swarnowski; A. N. Akhiezer; V. P. Seredniy; Y. F. Pavlenko; J. R. Juroshek (IEEE Trans. Instrum. Meas., 2001)

Fast method applied to the measurement of microwave power standards. - Bernard Mellouet; Laurent Velasco; Joseph Achkar (IEEE Trans. Instrum. Meas., 2001)

International comparison for RF power in the frequency range up to 18 GHz. - Jan P. M. de Vreede; Willemien Korfage; Patrik Persson; Luciano Brunetti; Valentin Lopez; Ivan Petras; Pierre Morard; Frantisek Hejsek; Andras Török; Jürgen Rühaak; John Ascroft; Erik DressLer; et al. (IEEE Trans. Instrum. Meas., 2001)

Reflectometer calibration without an open circuit. - Soubhi Abou Chahine; Bernard Huyart; Joseph Achkar (IEEE Trans. Instrum. Meas., 2003)

Design of a ku band delay difference calibration device for TWSTFT station. - Philippe Merck; Joseph Achkar (IEEE Trans. Instrum. Meas., 2005)