Electromagnetic conductor reflecting plate and antenna array thereof and radar thereof and communication apparatus thereof

• US 8,102,296 B2
• Filed: 03/03/2010
• Issued: 01/24/2012
• Est. Priority Date: 11/24/2009
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Tarng, Jenn-Hwan, Nien, Chin-Chung, Huang, Jun-Yen, Chang, Li-Yuan, Yu, Ya-Chung
• Primary Examiner(s): Brainard, Timothy A
• Application Number:
  US12/717,099
• Publication Number:
  US 20110122018A1
• Time in Patent Office: 692 Days
• Field of Search: 342 5- 12, 342/179
• US Class Current: 342/5
• CPC Class Codes: G01S 7/03 Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 1/48 Earthing means; Earth screens; Counterpoises
• CPC Class Codes: H01Q 19/00 Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic combination of horns with slotted waveguide array H01Q13/0233
• CPC Class Codes: H01Q 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40

Abstract

An exemplary example of the present disclosure proposes an electromagnetic conductor reflecting plate including a perfect electronic conductor and at least two artificial magnetic conductors, wherein the each of the artificial magnetic conductor is disposed on arbitrary one side of the perfect electronic conductor, and a boundary between the perfect electronic conductor and each of the artificial magnetic conductor forms a virtual radiation unit. In addition, an exemplary example of the present disclosure further proposes an antenna array including an antenna and the electromagnetic conductor reflecting plate, wherein the antenna is disposed on the electromagnetic conductor reflecting plate.

Claims

1. An electromagnetic conductor reflecting plate, comprising:

a perfect electronic conductor; and

at least two artificial magnetic conductors, wherein a structure of each artificial magnetic conductor is a two-dimensional substantial structure, the artificial magnetic conductors are symmetrically placed on the two sides of the perfect electronic conductor, and a virtual radiation unit is formed on a boundary between the perfect electronic conductor and each artificial magnetic conductor.

2. The electromagnetic conductor reflecting plate according to claim 1, wherein the structure of each artificial magnetic conductor is a two-dimensional substantial structure with three T shapes.

3. The electromagnetic conductor reflecting plate according to claim 1, wherein the structure of each artificial magnetic conductor is a two-dimensional substantial structure with four hexagons.

4. The electromagnetic conductor reflecting plate according to claim 1, wherein the distance between the two opposite artificial magnetic conductors is a multiple of a half wavelength of a radiated wave, but not zero.

5. The electromagnetic conductor reflecting plate according to claim 1, wherein a number of the artificial magnetic conductors is two, four, or eight.

6. The electromagnetic conductor reflecting plate according to claim 1, wherein the distance between the two neighboring artificial magnetic conductors on the same side of perfect electronic conductor is a multiple of a one-fourth wavelength of a radiated wave, but not zero.

7. The electromagnetic conductor reflecting plate according to claim 1, wherein the boundary between the perfect electronic conductor and each artificial magnetic conductor has an induced current.

8. An antenna array, comprising:

an electromagnetic reflecting plate, comprising;

a perfect electronic conductor; and

at least two artificial magnetic conductors, wherein a structure of each artificial magnetic conductor is a two-dimensional substantial structure, the artificial magnetic conductors are symmetrically placed on the two sides of the perfect electronic conductor, and a virtual radiation unit is formed on a boundary between the perfect electronic conductor and each artificial magnetic conductor; and

an antenna, placed on the electromagnetic reflecting plate.

9. The antenna array according to claim 8, wherein the structure of each artificial magnetic conductor is a two-dimensional substantial structure with three T shapes.

10. The antenna array according to claim 8, wherein the structure of each artificial magnetic conductor is a two-dimensional substantial structure with four hexagons.

11. The antenna array according to claim 8, wherein the distance between the two opposite artificial magnetic conductors is a multiple of a half wavelength of a radiated wave, but not zero.

12. The antenna array according to claim 8, wherein a number of the artificial magnetic conductors is two, four, or eight.

13. The antenna array according to claim 8, wherein the distance between the two neighboring artificial magnetic conductors on the same side of perfect electronic conductor is a multiple of a one-fourth wavelength of a radiated wave, but not zero.

14. The antenna array according to claim 8, wherein the boundary between the perfect electronic conductor and each artificial magnetic conductor has an induced current.

15. A radar, comprising:

an antenna array, comprising;

an electromagnetic reflecting plate, comprising;

a perfect electronic conductor; and

at least two artificial magnetic conductors, wherein a structure of each artificial magnetic conductor is a two-dimensional substantial structure, the artificial magnetic conductors are symmetrically placed on the two sides of the perfect electronic conductor, and a virtual radiation unit is formed on a boundary between the perfect electronic conductor and each artificial magnetic conductor; and

an antenna, placed on the electromagnetic reflecting plate; and

an imaging unit, for transceiving a radiated wave to be transceived by the antenna array.

16. The radar according to claim 15, wherein the radar is used in an imaging apparatus.

17. A communication apparatus, comprising:

an antenna array, comprising;

an electromagnetic reflecting plate, comprising;

a perfect electronic conductor; and

at least two artificial magnetic conductors, wherein a structure of each artificial magnetic conductor is a two-dimensional substantial structure, the artificial magnetic conductors are symmetrically placed on the two sides of the perfect electronic conductor, and a virtual radiation unit is formed on a boundary between the perfect electronic conductor and each artificial magnetic conductor; and

an antenna, placed on the electromagnetic reflecting plate; and

a communication unit, for encoding, decoding, modulating, or demodulating a radiated wave to be transceived by the antenna array.

18. The communication apparatus according to claim 17, wherein the communication apparatus is a wireless access point, a base station, a mobile phone, a wireless network card, or a netbook.