Systems and methods for controlling output power in a communication device

• US 7,071,776 B2
• Filed: 03/22/2004
• Issued: 07/04/2006
• Est. Priority Date: 10/22/2001
• Status: Expired due to Fees

• Current Assignee: Kyocera Corporation
• Original Assignee: Kyocera Wireless Corporation (Kyocera Corporation)
• Inventors: Fabrega-Sanchez, Jorge, Poilasne, Gregory, Forrester, Tim
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Nguyen, Khai M.
• Application Number:
  US10/806,763
• Publication Number:
  US 20050093624A1
• Time in Patent Office: 834 Days
• Field of Search: 330/129, 330/207.P, 455/115.1, 455126-127
• US Class Current: 330/129
• CPC Class Codes: H03G 3/001 Digital control of analog signals
• CPC Class Codes: H03G 3/3042 in modulators, frequency-changers, transmitters or power amplifiers transmission power control in bidirectional transmission systems H04W52/04
• CPC Class Codes: H03H 7/40 Automatic matching of load impedance to source impedance
• CPC Class Codes: H04B 1/3838 Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use

Abstract

A mismatch detector including a directional device adapted to couple signals across the device and a detector coupled to a port on the directional device and configured to measure a reflected power a second detector coupled to a port on the directional device and configured to measure a transmit power. The mismatch detector may be used in wireless communication devices, including, but not limited to mobile wireless devices, base stations, and communication systems.

Claims

1. A mismatch detector comprising:

a directional device comprising a circulator adapted to transmit signals to an antenna and receive reflected signals from the antenna, the output of the circulator coupled to a slow wave structure;

a detector coupled to a port on the directional device and configured to measure power of the reflected signal;

a second detector coupled to a port on the directional device and configured to measure power of the transmit signal; and

a processor configured to read the measured power of the transmit signal and the measured power of the reflected signal and to generate a first control signal configured to control a matching network and a second control signal configured to control an amplifier, wherein the processor is configured to generate both the first and second control signals based on the measured power of the transmit signal and the measured power of the reflected signal.

2. The mismatch detector of claim 1 wherein the slow wave structure is coupled to multiple power detectors.

3. The mismatch detector of claim 2 wherein the multiple power detectors are configured to measure magnitude and phase of a reflected signal.

4. A wireless electronic device comprising:

a matching circuit;

a mismatch detector coupled with the matching circuit, the mismatch detector including;

a directional device adapted to transmit signals to an antenna and receive reflected signals from the antenna,

a detector coupled to a port on the directional device and configured to measure power of the reflected signal,

a second detector coupled to a port on the directional device and configured to measure power of the transmit signal;

a processor configured to read the measured power of the transmit signal and the measured power of the reflected signal and to generate a first control signal configured to control a matching network and a second control signal configured to control an amplifier, wherein the processor is configured to generate both the first and second control signals based on the measured power of the transmit signal and the measured power of the reflected signal;

an antenna coupled to the matching circuit;

a transceiver comprising the amplifier coupled to the antenna through the matching circuit;

a control block coupled to the transceiver and adapted to control the transceiver;

a memory coupled to the control block and configured to store data for the control block;

an input device coupled to the control block and configured to receive input from a user; and

a power source coupled to the control block and configured to supply power to the control block.

5. The wireless device of claim 4 wherein the wireless device is a mobile wireless device.

6. The wireless device of claim 4 wherein the wireless device is a base station.

7. The wireless device of claim 4 wherein the wireless device is multiple wireless devices forming a wireless communication system.

8. The wireless system of claim 7 wherein the multiple wireless devices include at least one base station.

9. The wireless system of claim 7 wherein the multiple wireless devices include at least one mobile wireless device.