Switch attenuator
First Claim
1. A switch attenuator comprising:
- a first terminal connected to an antenna;
a second terminal connected to a transmitter; and
a third terminal connected to a receiver, thereby switching a first state and a second state,wherein in the first state,the first terminal is connected to the second terminal,the first terminal is electrically isolated from the third terminal,the third terminal is connected to a ground andthe switch attenuator is electrically controllable so as to vary an attenuation amount between the first terminal and the second terminal, while maintaining such a relationship that an impedance Z1 viewed from the first terminal is substantially equal to an impedance Z2 viewed from the second terminal,and wherein in the second state,the first terminal is connected to the third terminal,the first terminal is electrically isolated from the second terminal,the second terminal is connected to a ground andthe switch attenuator is electrically controllable so as to vary an attenuation amount between the first terminal and the third terminal, while maintaining such a relationship that the impedance Z1 viewed from the first terminal is substantially equal to an impedance Z3 viewed from the third terminal.
1 Assignment
0 Petitions
Accused Products
Abstract
The switch attenuator of the invention includes: a first terminal connected to an antenna; a second terminal connected to a transmitter; and a third terminal connected to a receiver, thereby switching a first state and a second state. In the first state, the first terminal is connected to the second terminal, the first terminal is electrically isolated from the third terminal, the third terminal is connected to a ground and the switch attenuator is electrically controllable so as to vary an attenuation amount between the first terminal and the second terminal while maintaining such a relationship that an impedance Z1 viewed from the first terminal is substantially equal to an impedance Z2 viewed from the second terminal, and in the second state, the first terminal is connected to the third terminal, the first terminal is electrically isolated from the second terminal, the second terminal is connected to a ground and the switch attenuator is electrically controllable so as to vary an attenuation amount between the first terminal and the third terminal, while maintaining such a relationship that the impedance Z1 viewed from the first terminal is substantially equal to an impedance Z3 viewed from the third terminal.
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Citations
10 Claims
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1. A switch attenuator comprising:
- a first terminal connected to an antenna;
a second terminal connected to a transmitter; and
a third terminal connected to a receiver, thereby switching a first state and a second state,wherein in the first state, the first terminal is connected to the second terminal, the first terminal is electrically isolated from the third terminal, the third terminal is connected to a ground and the switch attenuator is electrically controllable so as to vary an attenuation amount between the first terminal and the second terminal, while maintaining such a relationship that an impedance Z1 viewed from the first terminal is substantially equal to an impedance Z2 viewed from the second terminal, and wherein in the second state, the first terminal is connected to the third terminal, the first terminal is electrically isolated from the second terminal, the second terminal is connected to a ground and the switch attenuator is electrically controllable so as to vary an attenuation amount between the first terminal and the third terminal, while maintaining such a relationship that the impedance Z1 viewed from the first terminal is substantially equal to an impedance Z3 viewed from the third terminal. - View Dependent Claims (2, 3, 4)
- a first terminal connected to an antenna;
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5. A switch attenuator comprising:
- a first terminal connected to a first antenna;
a second terminal connected to a transmitter;
a third terminal connected to a receiver; and
a fourth terminal connected to a second antenna, thereby switching a first state, a second state, a third state and a fourth state,wherein in the first state, the first terminal is connected to the second terminal and is electrically isolated from the third terminal, the third terminal is connected to a ground, the fourth terminal is electrically isolated from the first, second and third terminals and the ground and the switch attenuator is electrically controllable so as to vary an attenuation amount between the first terminal and the second terminal, while maintaining such a relationship that an impedance Z1 viewed from the first terminal is substantially equal to an impedance Z2 viewed from the second terminal, and wherein in the second state, the first terminal is connected to the third terminal and is electrically isolated from the second terminal, the second terminal is connected to a ground, the fourth terminal is electrically isolated from the first, second and third terminals and the ground and the switch attenuator is electrically controllable so as to vary an attenuation amount between the first terminal and the third terminal, while maintaining such a relationship that the impedance Z1 viewed from the first terminal is substantially equal to an impedance Z3 viewed from the third terminal, and wherein in the third state, the fourth terminal is connected to the second terminal and is electrically isolated from the third terminal, the third terminal is connected to the ground, the first terminal is electrically isolated from the second, third and fourth terminals and the ground and the switch attenuator is electrically controllable so as to vary an attenuation amount between the fourth terminal and the second terminal, while maintaining such a relationship that an impedance Z4 viewed from the fourth terminal is substantially equal to the impedance Z2 viewed from the second terminal, and wherein in the fourth state, the fourth terminal is connected to the third terminal and is electrically isolated from the second terminal, the second terminal is connected to the ground the first terminal is electrically isolated from the second, third and fourth terminals and the ground and the switch attenuator is electrically controllable so as to vary an attenuation amount between the fourth terminal and the third terminal, while maintaining such a relationship that the impedance Z4 viewed from the fourth terminal is substantially equal to the impedance Z3 viewed from the third terminal. - View Dependent Claims (6, 7, 8, 9, 10)
- a first terminal connected to a first antenna;
Specification