Patent ID: 7778223
Filing Date: 2010-08-17
Classification: G01R,H01L,H04B

Abstract:
1. A cordless communication apparatus, comprising: a communication mode setting unit configured to switch between a single-slot mode for executing communication using one of a plurality of slots included in one frame, and a multi-slot mode for executing communication using more than one slots of the plurality of slots included in one frame, a wireless communication being executed in a communication mode selected by the communication mode setting unit; a first antenna and a second antenna, the first antenna being higher in sensitivity than the second antenna, and the first antenna having a different directional characteristic than the second antenna; an antenna setting unit configured to switch between the a-first antenna and the a-second antenna; a communication condition detecting unit configured to detect a communication condition of each of the first antenna and the second antenna, the communication condition detecting unit is provided with the a reception electric field detecting unit detect reception electric field of the first antenna and the second antenna; a controlling unit configured to control the antenna setting unit and the communication mode setting unit, such that: when the communication condition of the first antenna detected by the communication condition detecting unit is better than a predetermined communication condition including a condition where the reception electric fields is greater than a predetermined level, the controlling unit controls the antenna setting unit to select the first antenna for reception and controls control the communication mode setting unit to set the communication mode to the single-slot mode, when the communication condition of the first antenna detected by the communication condition detecting unit is not better than the a-predetermined communication condition, the controlling unit controls the communication mode setting unit to set the communication to the multi-slot mode, the controlling unit compares the condition of the first antenna with the condition of the second antenna, and if the communication condition of the first antenna detected by the communication detecting unit is better than the communication condition of the second antenna detected by the communication detecting unit, the controlling unit controls the antenna setting unit to select the first antenna for reception, and if the communication condition of the second antenna detected by the communication condition detecting unit is better than the communication condition of the first antenna detected by the communication condition detecting unit, the controlling unit controls the antenna setting unit to select the second antenna for reception, an amplifier configures to amplify electric field signal received by either of the first antenna and the second antenna, wherein the controlling unit sets a gain of the amplifier to a first value the reception electric field level detected by the reception electric field level detecting unit is higher than the predetermined level, while sets the gain of the amplifier to a second value which is larger than the first value when the reception electric field level detected by the reception electric field level detecting unit is not higher than the predetermined level.