Terminal device having meta-structure

• US 9,105,977 B2
• Filed: 08/07/2013
• Issued: 08/11/2015
• Est. Priority Date: 08/09/2012
• Status: Active Grant

• Current Assignee: soongsil university-industry cooperation foundation
• Original Assignee: soongsil university-industry cooperation foundation
• Inventors: Seo, Chul Hun, Lee, Chongmin, Kim, Hyoungjun
• Primary Examiner(s): Ho, Tan
• Application Number:
  US13/961,053
• Publication Number:
  US 20140043194A1
• Time in Patent Office: 734 Days
• Field of Search: 343/702, 343/756, 343/909
• US Class Current: 1/1
• CPC Class Codes: H01Q 1/245 with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
• CPC Class Codes: H01Q 15/0086 said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
• CPC Class Codes: H01Q 17/00 Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
• CPC Class Codes: H01Q 17/008 with a particular shape H01Q17/007 takes precedence
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

A terminal device includes a housing, a communication antenna, and an agglomerative meta-structure, wherein the agglomerative meta-structure comprises a first pattern layer connected in series between an input end and an output end of the agglomerative meta-structure, and a second pattern layer connected in parallel between the input end and the output end.

Claims

1. A terminal device comprising:

a housing;

a communication antenna installed in a first region in the housing and configured to transmit and receive electromagnetic waves; and

an agglomerative meta-structure installed in a second region spaced from the first region in the housing and configured to agglomerate the electromagnetic waves received from the communication antenna, wherein the agglomerative meta-structure comprises;

a first pattern layer connected in series between an input end and an output end of the agglomerative meta-structure; and

a second pattern layer connected in parallel between the input end and the output end.

2. The terminal device of claim 1, wherein the first pattern layer has an equivalent circuit, wherein the equivalent circuit comprises:

a first inductor;

a first capacitor connected in series to the first inductor;

a second capacitor connected in series to the first capacitor; and

a second inductor connected in series to the second capacitor,

wherein the second pattern layer comprises;

a third capacitor connected in parallel between the first capacitor and the second capacitor; and

a third inductor connected in series to the third capacitor.

3. The terminal device of claim 1, wherein the first pattern layer comprises:

an edge pattern formed along the inside of an outer surface of the agglomerative meta-structure; and

extended patterns extending from given points or corners of the respective sides of the edge pattern toward the inside of the agglomerative meta-structure.

4. The terminal device of claim 3, wherein the extended patterns have extended ends that are centered on a middle of the agglomerative meta-structure and are faced to one another.

5. The terminal device of claim 3, wherein each of the extended patterns has a concave-convex structure.

6. The terminal device of claim 1, wherein the agglomerative meta-structure comprises:

an edge pattern formed along the inside of an outer surface of the agglomerative meta-structure;

extended patterns extending from the corners of the edge pattern toward the inside of the agglomerative meta-structure; and

at least one inner pattern connected to each of the extended patterns, wherein the inner patterns have extended ends that are centered to a middle of the agglomerative meta-structure and are faced to one another, and the inner patterns have a type of a square, and each of the extended ends is configured to extend from a corner of the square.

7. The terminal device of claim 6, wherein the extended patterns have extended ends that are centered to a middle of the agglomerative meta-structure and are faced to one another.

8. The terminal device of claim 1, wherein the agglomerative meta-structure comprises:

an edge pattern formed along the inside of an outer surface of the agglomerative meta-structure;

first extended patterns extending from given points on respective sides of the edge pattern toward the inside of the agglomerative meta-structure, wherein the first extended patterns have extended ends that are centered to a middle of the agglomerative meta-structure and are faced to one another; and

second extended patterns extending from the corners of the edge pattern toward the inside of the agglomerative meta-structure.

9. The terminal device of claim 8, wherein the second extended patterns have a concave-convex structure.

10. The terminal device of claim 1, wherein the agglomerative meta-structure comprises:

an edge pattern formed along the inside of an outer surface of the agglomerative meta-structure;

first extended patterns extending from given points on respective sides of the edge pattern toward the inside of the agglomerative meta-structure, wherein the first extended patterns have extended ends that are centered to a middle of the agglomerative meta-structure and are faced to one another;

second extended patterns extending from the corners of the edge pattern toward the inside of the agglomerative meta-structure; and

at least one inner pattern connected to each of the second extended patterns, wherein the inner patterns have extended ends that are centered to a middle of the agglomerative meta-structure and are faced to one another, and the inner patterns have a type of a square, and each of the extended ends is configured to extend from a corner of the square.

11. The terminal device of claim 1, wherein the agglomerative meta-structure comprises:

an edge pattern formed along the inside of an outer surface of the agglomerative meta-structure;

first extended patterns extending from given points on sides of the edge pattern toward the inside of the agglomerative meta-structure, wherein the first extended patterns have extended ends that are centered to a middle of the agglomerative meta-structure and are faced to one another;

second extended patterns extending from corners of the edge pattern toward the inside of the agglomerative meta-structure; and

at least one inner pattern connected to each of the second extended patterns, the inner pattern having a plurality of unit-cell structures, wherein the inner patterns have extended ends that are centered to a middle of the agglomerative meta-structure and are faced to one another, and the inner patterns have a type of a square, and each of the extended ends is configured to extend from a corner of the square.

12. The terminal device of claim 1, wherein the agglomerative meta-structure comprises:

an edge pattern formed along the inside of an outer surface of the agglomerative meta-structure;

extended patterns extending from respective corners or given points on respective sides of the edge pattern toward the inside of the agglomerative meta-structure; and

inner patterns in the shape of a spiral connected to the extended patterns or connected to on at least two points on the extended patterns having a plurality of unit cell structures.

13. The terminal device of claim 12, wherein spaces between the inner patterns are configured to induce capacitance.

14. The terminal device of claim 12, wherein the second pattern layer has slit patterns or a circular pattern of an engraved form.

15. The terminal device of claim 14, wherein the slit patterns are formed by patterning pairs of at least two slit patterns so that the two slits are facing each other with a space between them.

16. The terminal device of claim 15, wherein the at least two patterns are configured to face saw-toothed shapes being put on the opposite sides.

17. The terminal device of claim 15, wherein the at least two patterns are configured to face concave-convex forms being put on the opposite sides.

18. The terminal device of claim 1, wherein the agglomerative meta-structure has a property that either a dielectric constant or permeability is negative.

19. The terminal device of claim 1, further comprising a wireless power transceiving unit.

20. The terminal device of claim 19, wherein the wireless power transceiving unit comprises:

a collective meta-structure configured to collective wireless power received from an outside; and

a charging antenna arranged between the collective meta-structure and the agglomerative meta-structure and configured to charge the wireless power.