RF and NFC PAMM enhanced electromagnetic signaling

• US 9,270,030 B2
• Filed: 02/28/2011
• Issued: 02/23/2016
• Est. Priority Date: 04/11/2010
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Alexopoulos, Nicolaos G., Kyriazidou, Chryssoula A.
• Primary Examiner(s): Karacsony, Robert
• Assistant Examiner(s): HOLECEK, PATRICK R
• Application Number:
  US13/037,051
• Publication Number:
  US 20110250838A1
• Time in Patent Office: 1,821 Days
• Field of Search: 343/700.MS, 343/909
• US Class Current: 1/1
• CPC Class Codes: H01Q 1/2283 mounted in or on the surface of a semiconductor substrate as a chip-type antenna or integrated with other components into an IC package
• CPC Class Codes: H01Q 15/0026 said selective devices having a stacked geometry or having multiple layers
• CPC Class Codes: H01Q 15/006 Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces
• CPC Class Codes: H01Q 15/0066 said selective devices being reconfigurable, tunable or controllable, e.g. using switches
• CPC Class Codes: H01Q 15/0093 having a fractal shape
• CPC Class Codes: H01Q 19/10 using reflecting surfaces

Abstract

A communication device includes a processing module, a transmitter section, a receiver section, a wireless communication structure, a projected artificial magnetic mirror (PAMM) array, and a metal backing. The transmitter section and the receiver section are on a first layer. The wireless communication structure is on a second layer, the PAMM array is on a third layer, and the metal backing is on a fourth layer. The PAMM array includes a non-conductive area to support coupling of the wireless communication structure to at least one of the transmitter section and the receiver section. In addition, the PAMM array provides electromagnetic shielding of the at least one of the transmitter section and the receiver section from the wireless communication structure.

Claims

1. A communication device comprises:

a transmitter section on a first layer;

a receiver section on the first layer;

a wireless antenna structure on a second layer;

a first projected artificial magnetic mirror (PAMM) array on a third layer between the first layer and the second layer, wherein the first PAMM array includes a first plurality of conductive coils;

a second PAMM array on a fourth layer between the first layer and the second layer, wherein the second PAMM array includes a second plurality of conductive coils; and

a metal backing on a fifth layer, wherein the first and second PAMM arrays are electrically connected to the metal backing and further include a feed-through area to support coupling of the wireless antenna structure to at least one of the transmitter section and the receiver section and wherein the first plurality of conductive coils of the first PAMM array are configured to a first distance from the wireless antenna structure on the second layer operable to provide electric field reflection for the wireless antenna structure at a first given frequency band and electromagnetic shielding to the receiver section and the transmitter section on the first layer between the metal backing on the fifth layer and the first PAMM array on the third layer and wherein the second plurality of conductive coils of the second PAMM array are configured to a second distance from the wireless antenna structure on the second layer operable to provide electric field reflection for the wireless antenna structure at a second given frequency band and further electromagnetic shielding to the receiver section and the transmitter section on the first layer between the metal backing on the fifth layer and the second PAMM array on the fourth layer.

2. The communication device of claim 1, wherein the first and second plurality of conductive coils are electrically coupled to the metal backing.

3. The communication device of claim 2 further comprises:

the first plurality of conductive coils are configured with a first size, shape, and pattern and the first distance to provide the electric field reflection for the wireless antenna structure at the first given frequency; and

the second plurality of conductive coils are configured with a second size, shape, and pattern and the second distance to provide the electric field reflection for the wireless antenna structure at the second given frequency.

4. The communication device of claim 1, wherein the wireless antenna structure comprises:

one or more antenna elements to form one or more antennas.

5. The communication device of claim 1, wherein the wireless antenna structure comprises:

one or more near field communication (NFC) coils.

6. The communication device of claim 1 further comprises:

a first die having the first layer for supporting the transmitter and receiver sections; and

a second die having the second and third and fourth layers for supporting the wireless antenna structure and the first and second PAMM arrays, respectively, wherein the first and second die are in a flip chip configuration and wherein the fifth layer is of the first die or the second die and is between the first layer and the third layer.

7. The communication device of claim 1 further comprises at least one of:

a processing module on the first layer; and

the processing module on a sixth layer.

8. An antenna circuit comprises:

an antenna structure on a first layer of a substrate;

a projected artificial magnetic mirror (PAMM) array on a second layer of the substrate;

a plurality of circuit components on a third layer of the substrate; and

a metal backing on a fourth layer of the substrate, wherein the PAMM array is electrically connected to the metal backing and includes a feed-through area to support coupling of the antenna structure to at least one of the plurality of circuit components; and

wherein the PAMM array includes a first plurality of conductive coils configured to provide electromagnetic signal shielding for at least one of the plurality of circuit components between the metal backing on the fourth layer and the PAMM array at a first frequency band of operation and includes a second plurality of conductive coils to provide electromagnetic signal shielding for at least one of the plurality of circuit components at a second frequency band of operation between the metal backing on the fourth layer and the PAMM array.

9. The antenna circuit of claim 8, wherein the first and second plurality of conductive coils are electrically coupled to the metal backing.

10. The antenna circuit of claim 9 further comprises:

wherein the first plurality of conductive coils of the PAMM array are configured to a first distance from the metal backing operable to provide the electromagnetic signal shielding for the at least one of the plurality of circuit components at the first frequency band of operation and wherein the second plurality of conductive coils of the PAMM array are configured to a second distance from the metal backing operable to provide the electromagnetic signal shielding for the at least one of the plurality of circuit components at the second frequency band of operation.

11. The antenna circuit of claim 8, wherein the antenna structure comprises at least one of:

a dipole antenna;

a monopole antenna;

a plurality of discrete antenna elements; and

a multi-layered helical coil antenna.

12. The antenna circuit of claim 8 further comprises:

the PAMM array including an array of modified Polya curve metal patches arranged in rows and columns; and

the antenna structure including a dipole antenna.

13. The antenna circuit of claim 8 further comprises:

the PAMM array including an array of square metal spirals arranged in rows and columns; and

the antenna structure including a dipole antenna.

14. A device, comprises:

a Near Field Communication (NFC) antenna structure on a first layer of an integrated circuit (IC);

a projected artificial magnetic mirror (PAMM) array on a second layer of the IC, wherein the PAMM array includes a plurality of metal patches;

a plurality of circuit components on a third layer of the IC; and

a metal backing on a fourth layer of the IC, wherein the PAMM array is electrically connected to the metal backing and includes a feed-through area to support coupling of the NFC antenna structure to at least one of the plurality of circuit components and wherein the plurality of metal patches of the PAMM array are adjusted to a certain distance “

d”

from the first layer operable to provide electric field reflection for the NFC antenna structure at a first frequency band of operation and a second frequency band of operation and further to provide electromagnetic shielding to the plurality of circuit components on the third layer between the metal backing on the fourth layer and the PAMM array on the second layer.

15. The device of claim 14, further comprising:

a first dielectric material between the PAMM array and the metal backing, wherein the plurality of metal patches is electrically coupled to the metal backing to form an inductive-capacitive network that substantially reduces surface waves along the first layer of the IC with the NFC antenna structure within the first frequency band of operation and the second frequency band of operation.

16. The device of claim 14, wherein the plurality of metal patches of the PAMM are electrically coupled to the metal backing.

17. The device of claim 16, further comprises:

the plurality of metal patches being of a size, shape, and pattern and being the distance “

d”

from the first layer to provide the electric field reflection for the NFC antenna structure at the first frequency band of operation and the second frequency band of operation.

18. The device of claim 14, wherein the first through fourth layers are layers of a plurality of layers of a die of the IC, wherein the first layer is an outer layer of the die.

19. The device of claim 14, wherein the first layer is a layer of a package substrate of the IC and wherein the second through fourth layers are layers of a plurality of layers of a die of the IC.

20. The device of claim 14, wherein the NFC antenna structure is an antenna structure operable to transmit a signal and wherein the plurality of circuit components on the third layer of the IC include a transmitter section, receiver section and processing module.

21. The device of claim 14, further comprising:

another Near Field Communication (NFC) antenna structure on a fifth layer of the integrated circuit (IC), wherein the fifth layer is between the first layer and the second layer and wherein the NFC antenna structure on the first layer and the another NFC antenna structure on the fifth layer are coupled by at least one of;

a series manner or a parallel manner.