Communication module

Patent metadata

Field	Value
Publication number	US-10423870-B2
Application number	US-201514710689-A
Country	US
Kind code	B2
Filing date	May 13, 2015
Priority date	May 14, 2014
Publication date	Sep 24, 2019
Grant date	Sep 24, 2019

Abstract

Various embodiments provide a communication module having a carrier, a loop antenna, a modulation circuit which is coupled to the loop antenna and is configured to modulate or demodulate signals which are received or transmitted using the loop antenna, and an impedance matching circuit for matching the impedance of the loop antenna to the input impedance of the modulation circuit. The modulation circuit and the impedance matching circuit are arranged inside the loop antenna on or in the carrier.

First claim

What is claimed is:

1. A communication module, comprising: a printed circuit board;
a loop antenna;
a modulation circuit coupled to the loop antenna and is configured to modulate or demodulate signals received or transmitted using the loop antenna; and
an impedance matching circuit for matching the impedance of the loop antenna to the input impedance of the modulation circuit;
wherein the modulation circuit and the impedance matching circuit are arranged inside the loop antenna and within the printed circuit board;
a ferrite core antenna structure coupled to the impedance matching circuit;
wherein the impedance matching circuit is configured up to match the impedance of the ferrite core antenna structure to the input impedance of the modulation circuit;
wherein the ferrite core antenna structure is arranged inside the loop antenna within the printed circuit board.

2. The communication module of claim 1 , further comprising:
a processor coupled to the modulation circuit, with the modulation circuit, the impedance matching circuit and the processor being arranged inside the loop antenna on or within the printed circuit board.

3. The communication module of claim 2 ,
the processor comprising a cryptoprocessor.

4. The communication module of claim 1 ,
wherein the impedance matching circuit comprises at least one of at least one SMD circuit or at least one embedded circuit.

5. The communication module of claim 1 ,
wherein the loop antenna is a printed circuit board (PCB) loop antenna.

6. The communication module of claim 1 , further comprising:
an energy supply interface.

7. The communication module of claim 1 , further comprising:
a 7816 interface.

8. The communication module of claim 1 , further comprising:
an SPI interface.

9. The communication module of claim 1 ,
wherein the modulation circuit is an NFC front-end.

10. The communication module of claim 1 ,
wherein the impedance matching circuit is an impedance matching network.

11. The communication module of claim 1 ,
being configured for NFC communication.

12. The communication module of claim 1 ,
being configured for battery-assisted communication.

13. The communication module of claim 1 , wherein the processor is arranged within the printed circuit board.

14. A subscriber identity module, comprising:
a communication module, comprising:
a printed circuit board;
a loop antenna;
a modulation circuit coupled to the loop antenna and is configured to modulate or demodulate signals received or transmitted using the loop antenna;
an impedance matching circuit for matching the impedance of the loop antenna to the input impedance of the modulation circuit; and
a ferrite core antenna structure coupled to the impedance matching circuit;
wherein the modulation circuit, the ferrite core antenna structure, and the impedance matching circuit are arranged inside the loop antenna, and within the printed circuit board.

15. The subscriber identity module of claim 14 ,
wherein the subscriber identity module is a subscriber identity module card.

16. A memory card, comprising:
a communication module, comprising:
a printed circuit board;
a loop antenna;
a modulation circuit coupled to the loop antenna and is configured to modulate or demodulate signals received or transmitted using the loop antenna;
an impedance matching circuit for matching the impedance of the loop antenna to the input impedance of the modulation circuit; and
a ferrite core antenna structure coupled to the impedance matching circuit;
wherein the modulation circuit, the ferrite core antenna, and the impedance matching circuit are arranged inside the loop antenna, and within the printed circuit board.

17. The memory card of claim 16 ,
wherein the memory card is a micro SD memory card.

18. A communication device, comprising:
an embedded communication module, comprising:
a printed circuit board;
a loop antenna;
a modulation circuit coupled to the loop antenna and is configured to modulate or demodulate signals received or transmitted using the loop antenna;
an impedance matching circuit for matching the impedance of the loop antenna to the input impedance of the modulation circuit; and
a ferrite core antenna structure coupled to the impedance matching circuit;
wherein the modulation circuit, the ferrite core antenna structure, and the impedance matching circuit are arranged inside the loop antenna, and within the printed circuit board.

19. The communication device of claim 18 , wherein the loop antenna, the impedance matching circuit, the ferrite core antenna, and the modulation circuit are encapsulated in an encapsulation material.

Assignees

• Infineon Technologies Ag

Inventors

• Buchsbaum Martin
• Gruber Josef
• Hoelzl Juergen
• Pueschner Frank
• Stampka Peter

Classifications

• H04B1/18

  Input circuits, e.g. for coupling to an antenna or a transmission line (coupling networks between antennas or lines and receivers independent of the nature of the receiver H03H) · CPC title

• H04B1/40

  Circuits · CPC title

• G06K19/073 Primary

  Special arrangements for circuits, e.g. for protecting identification code in memory (protection against unauthorised use of computer memory G06F12/14) · CPC title

• H01Q7/08

  Ferrite rod or like elongated core · CPC title

• H03H7/38

  Impedance-matching networks · CPC title