Reflection and hybrid reflection filters

• US 9,843,302 B2
• Filed: 02/13/2015
• Issued: 12/12/2017
• Est. Priority Date: 02/14/2014
• Status: Active Grant

• Current Assignee: University of Southern California
• Original Assignee: University of Southern California
• Inventors: Analui, Behnam, Goel, Ankush, Hashemi, Hossein
• Primary Examiner(s): Takaoka, Dean
• Application Number:
  US14/622,627
• Publication Number:
  US 20150236395A1
• Time in Patent Office: 1,033 Days
• Field of Search: 333109-112, 333116, 333117
• CPC Class Codes: H01P 1/20 Frequency-selective devices, e.g. filters
• CPC Class Codes: H03H 7/46 Networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source for use in multiplex transmission systems H04J1/00

Abstract

A two-port tunable or reconfigurable network having a filter transfer function may include: a network input port; a network output port; a hybrid coupler having a hybrid input port, a hybrid isolated port, a hybrid through port, and a hybrid coupled port; a first internal two-port network connected between the network input port and the hybrid input port; a second internal two-port network connected between the network output port and the hybrid isolated port; and a third internal two-port network connected between the hybrid through port and the hybrid coupled port. At least one of the first internal two-port network, the second internal two-port network, the third internal two-port network, and the hybrid coupler may be tunable or reconfigurable in response to an electrical signal or a user-operated control in a way that tunes or reconfigures the filter transfer function of the two-port tunable or reconfigurable network.

A two-port tunable or reconfigurable network having a filter transfer function may include: a network input port; a network output port; a hybrid coupler having a hybrid input port, a hybrid isolated port, a hybrid through port, and a hybrid coupled port; a first load; a second load; a first internal two-port network connected between the between the first load and the hybrid through port; and a second internal two-port network connected between the between the second load and the hybrid coupled port. At least one of the first internal two-port network, the second internal two-port network, the hybrid coupler, the first load, and the second load may be tunable or reconfigurable in response to an electrical signal or a user-operated control in a way that tunes or reconfigures the filter transfer function of the two-port tunable or reconfigurable network.

Claims

1. A two-port tunable or reconfigurable network having a filter transfer function comprising:

a network input port;

a network output port;

a hybrid coupler having a hybrid input port, a hybrid isolated port, a hybrid through port, and a hybrid coupled port;

a first internal two-port network connected between the network input port and the hybrid input port;

a second internal two-port network connected between the network output port and the hybrid isolated port; and

a third internal two-port network connected between the hybrid through port and the hybrid coupled port,

wherein at least one of the first internal two-port network, the second internal two-port network, the third internal two-port network, and the hybrid coupler are tunable or reconfigurable in response to an electrical signal or a user-operated control in a way that tunes or reconfigures the filter transfer function of the two-port tunable or reconfigurable network.

2. The two-port tunable or reconfigurable network of claim 1 wherein the filter transfer function has multiple passbands or stopbands.

3. The two-port tunable or reconfigurable network of claim 1 wherein at least one of the first internal two-port network, the second internal two-port network, the third internal two-port network, and the hybrid coupler is an integrated circuit.

4. The two-port tunable or reconfigurable network of claim 1 wherein at least one of the first internal two-port network, the second internal two-port network, the third internal two-port network, and the hybrid coupler are on the same substrate.

5. The two-port tunable or reconfigurable network of claim 1 wherein at least one of the first internal two-port network, the second internal two-port network, the third internal two-port network, and the hybrid coupler are integrated with a receiver, a transmitter, or a transceiver.

6. A two-port tunable or reconfigurable network comprising multiple instances of the two-port tunable or reconfigurable network of claim 1 connected in series.

7. A two-port tunable or reconfigurable network having a filter transfer function comprising:

a network input port;

a network output port;

a hybrid coupler having a hybrid input port, a hybrid isolated port, a hybrid through port, and a hybrid coupled port;

a first load;

a second load;

a first internal two-port network connected between the first load and the hybrid through port;

a second internal two-port network connected between the second load and the hybrid coupled port;

a third internal two-port network connected between the network input port and the hybrid input port; and

a fourth internal two-port network connected between the network output port and the hybrid isolated port,

wherein at least one of the first internal two-port network, the second internal two-port network, the third internal two-port network, the fourth internal two-port network, the hybrid coupler, the first load, and the second load are tunable or reconfigurable in response to an electrical signal or a user-operated control in a way that tunes or reconfigures the filter transfer function of the two-port tunable or reconfigurable network.

8. The two-port tunable or reconfigurable network of claim 7 wherein the filter transfer function has multiple passbands or stopbands.

9. The two-port tunable or reconfigurable network of claim 7 wherein at least one of the first internal two-port network, the second internal two-port network, the third internal two-port network, the fourth internal two-port network, the hybrid coupler, the first load and the second load is an integrated circuit.

10. The two-port tunable or reconfigurable network of claim 7 wherein at least one of the first internal two-port network, the second internal two-port network, the third internal two-port network, the fourth internal two-port network, the hybrid coupler, the first load, and the second load are on the same substrate.

11. The two-port tunable or reconfigurable network of claim 7 wherein at least one of the first internal two-port network, the second internal two-port network, the third internal two-port network, the fourth internal two-port network, the hybrid coupler, the first load, and the second load are integrated with a receiver, a transmitter, or a transceiver.

12. A two-port tunable or reconfigurable network comprising multiple instances of the two-port tunable or reconfigurable network of claim 7 connected in series.