An antenna system for wireless transmission, comprising: an antenna; and a logarithmic detector amplifier, LDA, (312; 1420) connected to the antenna and configured to reject radio interference in transmission data received or transmitted by the antenna, the LDA comprising: an amplifying circuit having an input port, and configured to receive, at the input port, an input signal having a first frequency and to generate an oscillation based on the input signal; one or more resonant circuits coupled to the amplifying circuit and configured to establish a frequency of operation of the system and to generate, at a first output port, a first output signal having a second frequency, the second frequency being substantially the same as the first frequency; and a controller circuit connected to the amplifier input and configured to cyclically terminate oscillation of the input signal each time a pre-determined threshold of voltage is detected, the controller circuit including a low pass filter configured to generate, at a second output port, a second output signal having a repetition frequency at a third frequency, wherein the antenna is coupled to the input port of the amplifying circuit and is configured to transmit a first transmit signal, and wherein the first transmit signal is amplified by the LDA operating in a reverse mode. an antenna; and a logarithmic detector amplifier, LDA, (312; 1420) connected to the antenna and configured to reject radio interference in transmission data received or transmitted by the antenna, the LDA comprising: an amplifying circuit having an input port, and configured to receive, at the input port, an input signal having a first frequency and to generate an oscillation based on the input signal; one or more resonant circuits coupled to the amplifying circuit and configured to establish a frequency of operation of the system and to generate, at a first output port, a first output signal having a second frequency, the second frequency being substantially the same as the first frequency; and a controller circuit connected to the amplifier input and configured to cyclically terminate oscillation of the input signal each time a pre-determined threshold of voltage is detected, the controller circuit including a low pass filter configured to generate, at a second output port, a second output signal having a repetition frequency at a third frequency, an amplifying circuit having an input port, and configured to receive, at the input port, an input signal having a first frequency and to generate an oscillation based on the input signal; one or more resonant circuits coupled to the amplifying circuit and configured to establish a frequency of operation of the system and to generate, at a first output port, a first output signal having a second frequency, the second frequency being substantially the same as the first frequency; and a controller circuit connected to the amplifier input and configured to cyclically terminate oscillation of the input signal each time a pre-determined threshold of voltage is detected, the controller circuit including a low pass filter configured to generate, at a second output port, a second output signal having a repetition frequency at a third frequency, wherein the antenna is coupled to the input port of the amplifying circuit and is configured to transmit a first transmit signal, and wherein the first transmit signal is amplified by the LDA operating in a reverse mode.