Broadband phase shifter

A method for providing a phase shift to an incoming signal selected from a broad band of frequencies comprising the steps of:

• receiving an incoming signal;
• dividing said incoming signal into a first signal and a second signal 90 degrees out of phase with said first signal;
• selectively gain varying said first signal and second signal over a continuous range and
• combining said gain varied first signal and said gain varied second signal to provide a third signal having a predetermined phase shift from said incoming signal.

A phase shifting circuit comprising:

• first means for dividing an incoming signal having a frequency within a wide band of frequencies into two signals, one 90 degrees out of phase with the other each having an amplitude approximately equal to said incoming signal
• second means for selectively varying the amplitude of one of said two signals and an other of said two signals each over a continuous range;
• and
• third means for combining said amplitude varied one signal and said amplitude varied other signal to provide a third signal having a predetermined phase shift from said incoming signal.

An apparatus for providing a phase shift to an incoming signal selected from a broad band of frequencies comprising:

• quadrature hybrid circuit for receiving the incoming signal and dividing it into two signals one 90 degrees out of phase with the other;
• first device for varying the amplitude of said one of two signals over a continuous range
• second device for varying the amplitude of said other of said two signals over a continuous range and
• summing circuit for adding said amplitude varied one signal and said amplitude varied other signal and producing a third signal having a preselected phase difference from said incoming signal.