Composite radio apparatus and diversity switching method

• US 20030017811A1
• Filed: 07/19/2002
• Published: 01/23/2003
• Est. Priority Date: 07/23/2001
• Status: Abandoned Application

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Hoshi, Yoshiyuki
• Application Number:
  US10/199,809
• Publication Number:
  US 20030017811A1
• Time in Patent Office: Days
• US Class Current: 455/101
• CPC Class Codes: H04B 7/0814 based on current reception conditions, e.g. switching to different antenna when signal level is below threshold

Abstract

A composite radio apparatus having two radio systems, comprises two antennas to be shared for a diversity operation of the two radio systems, and two antenna changeover switches for switching the two antennas, wherein the two antenna changeover switches serve to directly connect the two antennas to respective input/output sections of the two radio systems. In the composite radio apparatus according to the invention, the two antenna changeover switches are operated such that one of the antenna changeover switches connects one of the two antennas to the input/output section of one of the two radio systems when the other antenna changeover switch connects the other antenna to the input/output section of the other radio system.

Claims

1. A composite radio apparatus having two radio systems, comprising:

two antennas to be shared for a diversity operation of the two radio systems; and

two antenna changeover switches for switching the two antennas,

wherein the two antenna changeover switches serve to directly connect the two antennas to respective input/output sections of the two radio systems.

2. The composite radio apparatus according to claim 1, wherein the two antenna changeover switches are operated such that one of the antenna changeover switches connects one of the two antennas to the input/output section of one of the two radio systems when the other antenna changeover switch connects the other antenna to the input/output section of the other radio system.

3. The composite radio apparatus according to claim 2, wherein one of the antenna changeover switches serves to connect, by switching, the two antennas to either of the radio systems which is being operated.

4. The composite radio apparatus according to any of claims 1 to 3, further comprising a matching circuit corresponding to the radio system between at least one of the antenna changeover switches and the input/output section of the radio system.

5. A diversity switching method in a composite radio apparatus comprising two radio systems and two antennas to be shared in a diversity operation of the two radio systems,

directly connecting one of the two antennas to an input/output section of one of the radio systems which is carrying out the diversity operation;

and

directly connecting the other antenna to an input/output section of the other radio system.