| 摘要 |
PURPOSE:To improve the deterioration in an instantaneous reception power to noise power ratio and to reduce power consumption with respect to the diversity receiver used for a mobile communications system or the like. CONSTITUTION:The diversity receiver having a 1st reception means 1 receiving a signal with its external antenna to provide an output of reception output and a signal of a 1st reception electric field strength RSSIT1 usually in operation, a 2nd reception means 2 receiving the signal with its built-in antenna, and a switch means SW2 is provided with a threshold level setting means 3 setting a threshold level based on the 1st reception electric field strength and a control means 4. Then the control means compares the quantity between the received RSSIT1 and the threshold level RSSIT1 and activates the 2nd reception means in the case of detection of RSSIT1<=RSSIth to extract a 2nd reception output and to send it, but inactivates the 2nd reception means in the case of detection of RSSIT1>=RSSIth to extract a 1st reception output. |
