CRLH-TL meta material antenna

• US 8,902,118 B2
• Filed: 11/11/2009
• Issued: 12/02/2014
• Est. Priority Date: 11/13/2008
• Status: Expired due to Fees

• Current Assignee: Emw Co., Ltd.
• Original Assignee: Emw Co., Ltd.
• Inventors: Ryou, Byung Hoon, Sung, Won Mo, Jl, Jeong Keun
• Primary Examiner(s): Frech, Karl D
• Application Number:
  US13/129,392
• Publication Number:
  US 20110285602A1
• Time in Patent Office: 1,847 Days
• Field of Search: 343/848, 343/876, 343/700.MS
• US Class Current: 343/848
• CPC Class Codes: H01Q 1/48 Earthing means; Earth screens; Counterpoises
• CPC Class Codes: H01Q 13/10 Resonant slot antennas
• 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 21/30 Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
• CPC Class Codes: H01Q 9/27 Spiral antennas

Abstract

There is provided an antenna having a spiral-shaped loading formed on the ground plane, in which a resonant frequency is lowered as the reactance component of a CRLH-TL structure is adjusted.

Claims

1. An antenna having a spiral-shaped loading formed on a ground plane, for lowering a resonant frequency by adjusting reactance components of a CRLH-TL structure, wherein the spiral loading is formed as a spiral-shaped slot.

2. The antenna according to claim 1, wherein the spiral loading lowers a 0-th order resonant frequency if inductance of a parallel inductor L_L is increased in the CRLH-TL structure.

3. The antenna according to claim 1, wherein the resonant frequency is lowered as the number of turns of spiral is increased.

4. The antenna according to claim 3, wherein if the spiral loading is configured with two cells and both of the two cells are formed clockwise, a −

1-th order resonant frequency and a 0-th order resonant frequency are lowered as the number of turns of spiral is increased.

5. The antenna according to claim 3, wherein if the spiral loading is configured with two cells respectively formed clockwise and counterclockwise to face each other, a −

1-th order resonant frequency and a 0-th order resonant frequency are lowered as the number of turns of spiral is increased.

6. The antenna according to claim 1, wherein performance is adjusted depending on changes in the number of unit cells and sizes of a patch, a via, and a dielectric substrate constructing the spiral loading, and a width, an interval, and a direction of the spiral loading, and a position and method of feeding power to the spiral loading.

7. The antenna according to claim 6, wherein the dielectric substrate is placed in a middle, a power feed line and two patches are placed on an upper layer, the patches on the upper layer is connected to the spiral loadings on a lower layer through the vias, and the ground plane where the spiral-shaped slots are formed is placed on the lower layer.