Constant impedance, constant phase pin diode with attenuator
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorMark R. Williams
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Abstract
A constant impedance, constant phase PIN diode attenuator uses PIN diodes in a double pi configuration. A control voltage is applied simultaneously thereto thus attaining 40 dB attenuation without substantially varying phase and amplitude characteristics.
Claims3
A constant impedance, constant phase PIN diode variable attenuator being comprised of a first PIN diode pi pad, having a RF input terminal, a second PIN diode pi pad having an output terminal and in series with said first PIN diode pi pad, said first and second PIN diode pi pads comprising three diodes each and sharing a common diode, and a control voltage applied simultaneously to said first and second PIN diode pi pads for variation of attenuation thereof.
Dependencies are inferred from the claim text.