Antenna switching arrangement
First Claim
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1. An antenna switching arrangement, comprising:
- an input port coupled via a fourth transmission line to a fourth junction of a quadrature arrangement of quadrature transmission lines also provided with a first, a second and a third junction;
the first junction provided with a first switch operable to selectively couple the first junction to ground;
the second junction provided with a second switch operable to selectively couple the second junction to ground;
the third junction provided with a third switch operable to selectively couple the third junction to ground;
the first junction coupled via a first transmission line to a first output port;
the second junction coupled via a second transmission line to a second output port;
a terminating junction coupled via a third transmission line to the third junction;
a fourth switch operable to selectively couple the terminating junction to ground; and
a resistor coupled between the terminating junction and ground;
the first, second, third and fourth switches are each inductors, selectable by applying a control voltage to the inductor selected to cause magnetic saturation of a core of the inductor, reducing a reactance of the inductor.
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Abstract
An antenna switching arrangement with a quadrature arrangement of transmission lines through which a desired signal path may be configured via switches selectively grounding junctions of the switching arrangement. The desired path routing a signal from an input port to one or both of first and second output ports to generate a signal with vertical linear polarization, horizontal linear polarization or circular polarization. The selected polarization may be changed as desired and/or multiple antenna switching arrangements applied to enable simultaneous signals with different polarizations.
66 Citations
17 Claims
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1. An antenna switching arrangement, comprising:
- an input port coupled via a fourth transmission line to a fourth junction of a quadrature arrangement of quadrature transmission lines also provided with a first, a second and a third junction;
the first junction provided with a first switch operable to selectively couple the first junction to ground;
the second junction provided with a second switch operable to selectively couple the second junction to ground;
the third junction provided with a third switch operable to selectively couple the third junction to ground;
the first junction coupled via a first transmission line to a first output port;
the second junction coupled via a second transmission line to a second output port;
a terminating junction coupled via a third transmission line to the third junction;
a fourth switch operable to selectively couple the terminating junction to ground; and
a resistor coupled between the terminating junction and ground;
the first, second, third and fourth switches are each inductors, selectable by applying a control voltage to the inductor selected to cause magnetic saturation of a core of the inductor, reducing a reactance of the inductor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- an input port coupled via a fourth transmission line to a fourth junction of a quadrature arrangement of quadrature transmission lines also provided with a first, a second and a third junction;
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10. A method for switching the polarity of an RF signal, comprising the steps of:
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coupling the RF signal to an input port of a quadrature transmission line arrangement having a first output and a second output; setting a plurality of switches of the quadrature transmission line arrangement to select a desired signal path between the first output, the second output and simultaneously to the first output and the second output wherein at least one of the switches is an inductor, the inductor isolated from the respective junction by a capacitor, the switches selectable by applying a control voltage to the inductor selected to cause magnetic saturation of a core of the inductor, reducing a reactance of the inductor. - View Dependent Claims (11, 12, 13, 15, 16, 17)
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14. A method for switching the polarity of an RF signal, comprising the steps of:
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coupling the RF signal to an input port of a quadrature transmission line arrangement having a first output and a second output; setting a plurality of switches of the quadrature transmission line arrangement to select a desired signal path between the first output, the second output and simultaneously to the first output and the second output;
wherein the setting of the switches is alternated between defining the signal path resulting in a selected polarization of one of a vertical linear polarization, a horizontal linear polarization and a circular polarization.
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Specification