Variable RF power splitter
First Claim
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1. An adjustable RF power splitter for coupling power received at an input terminal to two output terminals, wherein the ratio of RF voltage to the two outputs is adjustable, comprising:
- first, second, and third mutually coupled inductors connected in series so that the first inductor is connected between a first electrical junction and a second junction, the second inductor is connected between the second junction and a third junction, and the third inductor is connected between the third junction and a fourth junction;
an input terminal and a reference terminal adapted for receiving an RF power input signal therebetween, the input terminal being connected to one of the four junctions;
a variable reactance whose impedance is adjustable over a range, the variable reactance being connected between one of the other three junctions and the reference terminal;
a first output terminal connected t one of the other two junctions; and
a second output terminal connected to the remaining junction;
whereby first and second output voltages are produced between the first and second output terminals, respectively, and the reference terminal, and whereby adjusting the variable reactance operates to vary the ratio between the first and second voltages.
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Abstract
A variable RF power splitter including three serially connected inductors (14, 15, 16) powered by an RF power source (11, 12). Two loads (17, 18), between which the RF power is to be split, are connected to ground from two different points in the inductance string. A variable reactance (19) connected to ground from another point in the inductance string controls the RF power splitting.
59 Citations
15 Claims
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1. An adjustable RF power splitter for coupling power received at an input terminal to two output terminals, wherein the ratio of RF voltage to the two outputs is adjustable, comprising:
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first, second, and third mutually coupled inductors connected in series so that the first inductor is connected between a first electrical junction and a second junction, the second inductor is connected between the second junction and a third junction, and the third inductor is connected between the third junction and a fourth junction; an input terminal and a reference terminal adapted for receiving an RF power input signal therebetween, the input terminal being connected to one of the four junctions; a variable reactance whose impedance is adjustable over a range, the variable reactance being connected between one of the other three junctions and the reference terminal; a first output terminal connected t one of the other two junctions; and a second output terminal connected to the remaining junction; whereby first and second output voltages are produced between the first and second output terminals, respectively, and the reference terminal, and whereby adjusting the variable reactance operates to vary the ratio between the first and second voltages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An RF power splitter, comprising:
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first, second, and third mutually coupled inductors connected in series, the first inductor connected between a first terminal and a second terminal, the second inductor connected between the second terminal and a third terminal, and the third inductor connected between the third terminal and a fourth terminal; an RF power input signal connected between one of said four terminals and a reference terminal; a first and a second load, each load connected between a different one of the other three terminals, respectively, and said reference terminal; and a variable reactance connected between a remaining one of the four terminals and said reference terminal, said variable reactance being operable to vary the voltage ratio between the first load and the second load. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification