Abstract: A logarithmic detector amplifying (LDA) system is provided for use as a high sensitivity receive booster or replacement for a low noise amplifier in a receive chain of a communication device. The LDA system includes an amplifying circuit configured to receive an input signal having a first frequency and generate an oscillation based on the input signal, a sampling circuit coupled to the amplifying circuit and configured to terminate the oscillation based on a predetermined threshold to periodically clamp and restart the oscillation to generate a series of pulses modulated by the oscillation and by the input signal, and one or more metamaterial (“MTM”) resonant circuits coupled in shunt with an RF path that couples the amplifying circuit in series and configured to establish a frequency of operation and a phase response to output a signal having RF frequencies with a ultra-wide bandwidth.

Abstract: A logarithmic detector amplifying (LDA) system is provided for use as a high sensitivity receive booster or replacement for a low noise amplifier in a receive chain of a communication device. The LDA system includes an amplifying circuit configured to receive an input signal having a first frequency and generate an oscillation based on the input signal, a sampling circuit coupled to the amplifying circuit and configured to terminate the oscillation based on a predetermined threshold to periodically clamp and restart the oscillation to generate a series of pulses modulated by the oscillation and by the input signal, and one or more metamaterial (“MTM”) resonant circuits coupled in shunt with an RF path that couples the amplifying circuit in series and configured to establish a frequency of operation and a phase response to output a signal having RF frequencies with a ultra-wide bandwidth.

Abstract: A wireless coupling method is suitable for use in calibration and testing of a radiofrequency device under test (DUT). The DUT includes a printed circuit board having one or more integral antennas. The wireless coupling method comprises the use of a test fixture to position the DUT a prescribed distance from a reference unit comprising a second printed circuit board with one or more similar integral antenna(s). Each antenna of the reference unit is aligned optimally to a corresponding antenna of the DUT for transmitting or receiving RF signals in one or more frequency channels in accordance with a test procedure script. Test equipment is coupled to the antennas and is used for measuring or generating each test of the test procedure and saving the measurements in memory.