PRINTED MULTILAYER FILTER METHODS AND DESIGNS USING EXTENDED CRLH (E-CRLH)

• US 20110050364A1
• Filed: 08/25/2009
• Published: 03/03/2011
• Est. Priority Date: 08/25/2009
• Status: Active Grant

• Current Assignee: Gula Consulting Limited Liability Company (Intellectual Ventures LLC)
• Original Assignee: Rayspan Corporation
• Inventors: Achour, Maha
• Granted Patent: US 8,334,734 B2
• Time in Patent Office: Days
• US Class Current: 333/185
• CPC Class Codes: H01P 1/20345 Multilayer filters
• CPC Class Codes: H01P 1/20363 Linear resonators
• CPC Class Codes: H03H 7/00 Multiple-port networks comprising only passive electrical elements as network components receiver input circuits H04B1/18; networks simulating a length of communication cable H04B3/40
• CPC Class Codes: H05K 1/0236 Electromagnetic band-gap structures
• CPC Class Codes: H05K 1/024 Dielectric details, e.g. changing the dielectric material around a transmission line

Abstract

Printed multilayer filter design techniques and filters based on metamaterial structures including an extended composite left and right handed (E-CRLH) metamaterial unit cell.

Claims

1. A metamaterial filter apparatus, comprising:

a mounting assembly;

a printed multilayer assembly having a plurality of printed conductive, vertically stacked, dielectric layers, wherein the top or bottom layer is attached to the mounting assembly;

a plurality of inductors and capacitors, wherein each inductor and each capacitor are formed on up to six layers of the printed multilayer assembly, the number of inductors formed is greater than or equal to 4, and the number of capacitors formed is greater than 4; and

a plurality of vias formed in the printed multilayer assembly to connect the inductors and capacitors, wherein the inductors, capacitors, and vias are structured to produce an E-CRLH filter.

2. The metamaterial filter apparatus of claim 1, wherein the inductors, capacitors, and vias are structured to produce a symmetric E-CRLH filter.

3. The metamaterial filter apparatus of claim 1, wherein the inductors, capacitors, and vias are structured to produce an asymmetric E-CRLH filter.

4. The metamaterial filter apparatus of claim 2, wherein the symmetric E-CRLH filter is configured as a broadband high-Q filter.

5. The metamaterial filter apparatus of claim 2, wherein the symmetric E-CRLH filter is configured as a narrowband high-Q filter.

6. The metamaterial filter apparatus of claim 3, wherein the asymmetric E-CRLH filter is configured as a broadband high-Q filter.

7. The metamaterial filter apparatus of claim 3, wherein the asymmetric E-CRLH filter is configured as a narrowband high-Q filter.

8. The metamaterial filter apparatus of claim 1, wherein the printed multilayer assembly is LTCC or HTCC.

9. A method for designing a filter circuit, comprising:

identifying target filter performance parameters of a

filter circuit, including an impedance, a frequency band, and a filter bandwidth of the filter circuit;

deriving a plurality of initial circuit parameters based on the identified target filter performance parameters, cutoff frequencies, and impedance matching conditions of the filter circuit;

evaluating a beta curve, return loss, transmission bands, and impedances of the filter circuit; and

creating a spreadsheet to iteratively optimize and verify the circuit parameters of the filter circuit to search for a final set of circuit parameters that meet the identifying target filter performance parameters.