| CPC H01Q 3/38 (2013.01) [H03H 7/185 (2013.01); H04L 27/362 (2013.01); H03H 17/08 (2013.01)] | 20 Claims |
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1. A passive vector modulator comprising:
a power divider that splits an input signal into a first divided signal and a second divided signal, the first divided signal and second divided signal being 90° apart in phase; and
a switched transformer phase shifter in electrical communication with the power divider, including:
primary windings being center-tapped to form first primary windings and second primary windings, the first primary windings receiving the first divided signal, the second primary windings receiving the second divided signal;
first secondary windings being inductively coupled to the first primary windings, the first secondary windings being center-tapped and outputting first and second phase shifted output signals, the first phase shifted output signal being phase shifted 180° and the second phase shifted output signal being phase shifted 0°;
second secondary windings being inductively coupled to the second primary windings, the second secondary windings being center-tapped and outputting third and fourth phase shifted signals, the third phase shifted output signal being phase shifted 270° and the fourth phase shifted output signal being phase shifted 90°; and
a switch configured to receive the first, second, third, and fourth phase shifted output signals, the switch, in response to a control signal, selectively outputting one of the first, second, third, and fourth phase shifted output signals, or a combination thereof, from the passive vector modulator as a vector modulated output signal.
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