Operation frequency band customizable and frequency tunable filters with EBG substrates

Patent metadata

Field	Value
Publication number	US-10033084-B2
Application number	US-201514937811-A
Country	US
Kind code	B2
Filing date	Nov 10, 2015
Priority date	Nov 10, 2014
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

A cavity resonator or filter constructed on electromagnetic bandgap (EBG) substrate is provided that includes an external controlling assemble having a plurality of components configured to change a working frequency of the cavity resonator or filter. A dual-band bandpass filter is provided that includes two or more single band filters on a single EBG substrate and an external controlling assemble having a plurality of components configured to change a working frequency of the cavity resonator or filter.

First claim

What is claimed:

1. A cavity resonator or filter comprising
an electromagnetic bandgap (EBG) substrate, and
a built-in controlling assembly having a plurality of components configured to change a working frequency of the cavity resonator or filter, wherein the plurality of built in components are configured to enable controllable capacitive or inductive coupling of the cavity resonator or filter.

2. The cavity resonator or filter of claim 1 , further comprising
a top metal layer,
a bottom metal layer, and
a plurality of posts serving as a periodic lattice structure extending through the EBG substrate and connecting the bottom metal layer with the top metal layer.

3. The cavity resonator or filter of claim 2 wherein the periodic lattice structure and top and bottom metal layers defining a resonating cavity.

4. A controllable cavity resonator/filter comprising:
an energy input and output coupling structure,
a cavity structure, wherein the cavity structure comprises a substrate, first and second metal layers above and below the substrate, and an array of posts extending between the first and second metal layers,
a first controllable reactance structure, and
a second controllable reactance structure on the substrate.

5. The controllable cavity resonator/filter of claim 4 further comprising CPW and slotline structures are formed on the first metal layer of the cavity to enable input and output energy coupling.

6. The controllable cavity resonator/filter of claim 4 , wherein the first controllable reactance structure comprises a plurality of built in elements.

7. The controllable cavity resonator/filter of claim 6 , wherein the built in elements are configured to controllably change the reactance between a first reactance and a second reactance.

8. The controllable cavity resonator/filter of claim 4 , further comprising
a cap structure, and
a plurality of capacitive or inductive control elements.

9. The controllable cavity resonator/filter of claim 8 , wherein the cap structure includes a first portion spaced apart from a second portion by a gap space.

10. The controllable cavity resonator/filter of claim 9 , wherein the post structure extends between the substrate and the first portion of the cap structure.

11. The controllable cavity resonator/filter of claim 10 , wherein the capacitive or inductive control elements can be lumped elements, built in elements or a plurality of tuning elements at least partially located in the gap space.

12. The controllable cavity resonator/filter of claim 4 , wherein the controllable reactance structure comprises a plurality of external elements that interface with the cavity structure.

13. The controllable cavity resonator/filter of claim 12 , wherein the external elements are configured to controllably change the reactance between a first reactance and a second reactance.

14. The controllable cavity resonator/filter of claim 12 , wherein the working frequency of the cavity resonator/filter is a function of the reactance and the post impedance.

15. The controllable cavity resonator/filter of claim 12 , further comprising an interface structure comprising a metal pad separated from surrounding metal by gaps and formed on a housing of the cavity structure.

16. The controllable cavity resonator/filter of claim 15 , wherein the external elements are connected to the metal pad.

17. The controllable cavity resonator/filter of claim 15 , wherein at least one post of the array of posts of the cavity structure connects with the metal pad.

18. The controllable cavity resonator/filter of claim 17 , wherein a post impedance is a function of the at least one post.

Assignees

• Univ California

Inventors

• Li Guann-Pyng
• Guo Yu

Classifications

• H01P1/2005

  Electromagnetic photonic bandgaps [EPB], or photonic bandgaps [PBG] · CPC title

• H01P7/065 Primary

  integrated in a substrate · CPC title