Microwave switch
First Claim
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1. A transmit and receive module comprising means, having a first pair of ports and a second pair of ports, for connecting signals fed to one of the first pair of ports to one of the second pair of ports and for connecting signals fed to the other one of the second pair of ports to the other one of the first pair of ports, said connecting means comprising:
- (a) a first quadrature hybrid coupler having a first, a second, a third and a fourth port, the first port being one of the first pair of ports of the connecting means;
(b) a second quadrature hybrid coupler having a first, a second, a third and a fourth port, the first port being the other one of the first pair of ports of the connecting means;
(c) a third quadrature hybrid coupler having a first, a second, a third and a fourth port, the first port being one of the second pair of ports of the connecting means;
(d) a fourth quadrature hybrid coupler having a first, a second, a third and a fourth port, the first port being the other one of the second pair of ports of the connecting means; and
(e) means, responsive to a control signal, for coupling the second and third port of the first quadrature hybrid coupler to the third and second port, respectively, of the third quadrature hybrid coupler and, alternatively, to the third and second port, respectively, of the fourth quadrature hybrid coupler and for coupling the second and third port of the second quadrature hybrid coupler to the third and second port, respectively, of the third quadrature hybrid coupler and, alternatively, to the third and second port, respectively, of the fourth quadrature hybrid coupler.
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Abstract
A transmit and receive module is described which provides means within the module for switching between two orthogonal linear polarization ports and right and left hand circular polarization ports for both transmission and reception while maintaining very low RF reflections from the module at antenna ports.
94 Citations
19 Claims
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1. A transmit and receive module comprising means, having a first pair of ports and a second pair of ports, for connecting signals fed to one of the first pair of ports to one of the second pair of ports and for connecting signals fed to the other one of the second pair of ports to the other one of the first pair of ports, said connecting means comprising:
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(a) a first quadrature hybrid coupler having a first, a second, a third and a fourth port, the first port being one of the first pair of ports of the connecting means; (b) a second quadrature hybrid coupler having a first, a second, a third and a fourth port, the first port being the other one of the first pair of ports of the connecting means; (c) a third quadrature hybrid coupler having a first, a second, a third and a fourth port, the first port being one of the second pair of ports of the connecting means; (d) a fourth quadrature hybrid coupler having a first, a second, a third and a fourth port, the first port being the other one of the second pair of ports of the connecting means; and (e) means, responsive to a control signal, for coupling the second and third port of the first quadrature hybrid coupler to the third and second port, respectively, of the third quadrature hybrid coupler and, alternatively, to the third and second port, respectively, of the fourth quadrature hybrid coupler and for coupling the second and third port of the second quadrature hybrid coupler to the third and second port, respectively, of the third quadrature hybrid coupler and, alternatively, to the third and second port, respectively, of the fourth quadrature hybrid coupler. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A microwave switch comprising:
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(a) first means, having a first, a second and a third port, for coupling signals fed to the first port to the second and third port and alternatively coupling signals fed to the second and third port to the first port; (b) second means, having a first, a second and a third port, for coupling signals fed to the first port to the second and third port and alternatively coupling signals fed to the second and third port to the first port; (c) third means, having a first, a second and a third port, for coupling signals fed to the first port to the second and third port and alternatively coupling signals fed to the second and third port to the first port; (d) fourth means, having a first, a second and a third port, for coupling signals fed to the first port to the second and third port and alternatively coupling signals fed to the second and third port to the first port; and (e) fifth means, responsive to a control signal, for coupling the second and third port of the first coupling means to the third and second port, respectively, of the third coupling means and, alternatively, to the third and second port, respectively, of the fourth coupling means and for coupling the second and third port of the second coupling means to the third and second port, respectively, of the third coupling means and, alternatively, to the third and second port, respectively, of the fourth coupling means. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An apparatus comprising:
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(a) a first quadrature hybrid coupler having a first, a second, a third and a fourth port; (b) a second quadrature hybrid coupler having a first, a second, a third and a fourth port; (c) a third quadrature hybrid coupler having a first, a second, a third and a fourth port; (d) a fourth quadrature hybrid coupler having a first, a second, a third and a fourth port; (e) first switching means, having a first, a second, a third and a fourth port, for coupling the first port of the first switching means to the second port of the first switching means and the third port of the first switching means to the fourth port of the first switching means and, alternatively, for coupling the first port of the first switching means to the fourth port of the first switching means and the third port of the first switching means to the second port of the first switching means, the first port of the first switching means coupled to the third port of the first quadrature hybrid coupler and the third port of the first switching means coupled to the third port of the second quadrature hybrid coupler; and (f) second switching means, having a first, a second, a third and a fourth port, for coupling the first port of the second switching means to the second port of the second switching means and the third port of the second switching means to the fourth port of the second switching means and, alternatively, for coupling the first port of the second switching means to the fourth port of the second switching means and the third port of the second switching means to the second port of the second switching means, the first port of the second switching means coupled to the second port of the first quadrature hybrid coupler and the third port of the second switching means coupled to the second port of the second quadrature hybrid coupler. - View Dependent Claims (16, 17, 18, 19)
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Specification