An attenuation and phase shift divider circuit

An attenuation and phase shift divider circuit is described. The theory is presented for accurate division of small attenuation and phase shift changes by arbitrarily selected ratios, and the procedure is given for adjusting the circuit. The circuit is useful for accurately producing small attenuation changes such as 0.0001 dB and small phase shift changes such as 0.02°, which are outside the capabilities of most commercially available instruments.