Communication Apparatus to Support Multiband Communication

• US 20110085476A1
• Filed: 10/13/2010
• Published: 04/14/2011
• Est. Priority Date: 10/14/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KIM, Duck Hwan, KIM, Chul Soo, KIM, Young Il, SONG, In Sang, SHIN, Jea Shik, PARK, Yun Kwon
• Granted Patent: US 8,660,043 B2
• Time in Patent Office: Days
• US Class Current: 370/277
• CPC Class Codes: H04B 1/0057 using diplexing or multiplexing filters for selecting the desired band

Abstract

A communication apparatus to support multiband communication is provided. The communication apparatus may be applicable to, for example, a duplexer module for the multiband communication. The communication apparatus may be manufactured to be small and light by simplifying a circuit structure of the duplexer module.

Claims

1. A communication apparatus to support a multiband communication, the communication apparatus comprising:

a transmission signal filtering unit to filter n multiband transmission signals, wherein n denotes a natural number;

a first path setting unit to transfer one or more of the n multiband transmission signals to an antenna unit;

a phase shifter to separate the one or more multiband transmission signals and multiband received signals by shifting a phase of the multiband transmission signals transferred to the antenna unit; and

a second path setting unit to connect the phase shifter to n received signal filters.

2. The communication apparatus of claim 1, wherein the second path setting unit comprises (n−

1) matching circuits for matching of a radio frequency (RF) signal.

3. The communication apparatus of claim 2, wherein:

a first terminal of the phase shifter is connected to the first path setting unit,

a second terminal of the phase shifter is connected to a first received signal filter from among the n received signal filters,

a first terminal of a first matching circuit from among the (n−

1) matching circuits is connected to the second terminal of the phase shifter,

a second terminal of the first matching circuit from among the (n−

1) matching circuits is connected to a second received signal filter from among the n received signal filters,

a first terminal of an (n−

1)^th matching circuit from among the (n−

1) matching circuits is connected to the second terminal of the phase shifter, and

a second terminal of the (n−

1)^th matching circuit from among the (n−

1) matching circuits is connected to an n^th received signal filter from among the n received signal filters.

4. The communication apparatus of claim 1, wherein the second path setting unit comprises (n−

1) transmission lines to transfer a multiband received signal to one of the n received signal filters.

5. The communication apparatus of claim 4, wherein:

a first terminal of the phase shifter is connected to the first path setting unit,

a second terminal of the phase shifter is connected to a first received signal filter from among the n received signal filters,

a first terminal of a first transmission line among the (n−

1) transmission lines is connected to the second terminal of the phase shifter,

a second terminal of the first transmission line among the (n−

1) transmission lines is connected to a second received signal filter from among the n received signal filters,

a first terminal of an (n−

1)^th transmission line among the (n−

1) transmission lines is connected to the second terminal of the phase shifter, and

a second terminal of the (n−

1)^th transmission line among the (n−

1) transmission lines is connected to an n^th received signal filter from among the n received signal filters.

6. The communication apparatus of claim 1, wherein the second path setting unit comprises a switching unit comprising (n+1) terminals to connect the phase shifter to the n received signal filters.

7. The communication apparatus of claim 6, wherein:

a first terminal of the phase shifter is connected to the first path setting unit,

a second terminal of the phase shifter is connected to a first terminal of the switching unit comprising the (n+1) terminals,

a second terminal of the switching unit comprising the (n+1) terminals is connected to a first received signal filter from among the n received signal filters, and

an (n+1)^th terminal of the switching unit comprising the (n+1) terminals is connected to an n^th received signal filter from among the n received signal filters.

8. A communication apparatus for supporting a multiband communication, the communication apparatus comprising:

a first module to perform a duplexer function of a first frequency band; and

a second module to perform a duplexer function of a second frequency band,

wherein the first module comprises;

a first module transmission signal filtering unit to filter L multiband transmission signals, wherein L denotes a natural number;

a first module first path setting unit to transfer one of the L multiband transmission signals to a first module antenna unit;

a first module phase shifter to separate multiband transmission signals and multiband received signals by shifting a phase of the multiband transmission signal transferred to the first module antenna unit; and

a first module second path setting unit to connect the first module phase shifter to L first module received signals filters, and

the second module comprises;

a second module transmission signal filtering unit to filter M multiband transmission signals, wherein M denotes a natural number;

a second module first path setting unit to transfer one of the M multiband transmission signals to a second module antenna unit;

a second module phase shifter to separate multiband transmission signals and multiband received signals by shifting a phase of the multiband transmission signal transferred to the second module antenna unit; and

a second module second path setting unit to connect the second module phase shifter to M second module received signals filters

9. The communication apparatus of claim 8, wherein:

the first module second path setting unit comprises (L−

1) matching circuits for matching of an RF signal, and

the second module second path setting unit comprises (M−

1) matching circuits for matching of the RF signal.

10. The communication apparatus of claim 8, wherein:

the first module second path setting unit comprises (L−

1) transmission lines for transmission of a multiband received signal, and

the second module second path setting unit comprises (M−

1) transmission lines for transmission of the multiband received signal.

11. The communication apparatus of claim 8, wherein:

the first module second path setting unit comprises a first module switching unit comprising (L+1) terminals for connecting the first module phase shifter and the L received signal filters, and

the second module second path setting unit comprises a second module switching unit comprising (M+1) terminals for connecting the second module phase shifter and the M received signal filters.