Studies of elements used in hertzian interferometry (millimetric waves). Measurement of the permittivity of a liquid dielectric

Study of some elements used in EHF interferometry (bond of millimeter waves). This study is about design of the following elements: horns, horns associated with lens, power separators: -) Study of assemblies allowing measurements of complex dielectric constants of liquids. These devices are used in free propagation about wave lengths ≤ 2 mm; -) Studied devices: Interferometer for 2 separated waves and Michelson's type interferometer; -) 4 liquids have been used: ε'r Octane from -50 to 70 C (-58 to 158 F), ε'r and ε'' [Monochlorobenzene at 22,8 C (73 F), Mixture of octane with 10,8 per cent citral at 22 C (72 F) and Benzene at 21 C (70 F)]. -) Precision obtained about measurements: Δε'/ε' de 1 a 2%, Δε''/ε'' de 4 a 6%.(author)