Patent ID: 8693599
Filing Date: 2014-04-08
Classification: H01Q,H04B

Abstract:
1. A wireless receiving apparatus comprising: a first receiving antenna and a second receiving antenna that convert arrival signals to received power; a capacity-variable parasitic element connected to the second receiving antenna; a down-converter that demodulates signals received by the first and second receiving antennas; a multiplexer that is disposed between the first and second receiving antennas and the down-converter and alternately switches the connection of the first or second receiving antenna and the down-converter in a shorter time than a symbol rate of a modulated signal included in the arrival signal; and a control section of a radio frequency integrated circuit that outputs a voltage value according to a target capacity value of the capacity-variable parasitic element connected to the second receiving antenna so as to maximize communication capacity of the first receiving antenna when the first receiving antenna and the down-converter are connected, wherein the control section controls a capacity value of the capacity-variable parasitic element at a rate more than a Doppler frequency.