Phase Shift Characteristics of Dielectric Loaded Waveguide

An investigation of waveguide phase shifting techniques was conducted recently for the purpose of establishing the design criteria of a device capable of meeting the following electrical specifications: a phase shift variable over minimum range of 360/spl deg/ and a maximum phase slope (or deviation) of 5/spl deg/ at any phase setting over at least a 10 per cent frequency band width. Mechanical simplicity, low insertion loss, rugged construction and small size are also essential characteristics.