Patent ID: 9142887
Filing Date: 2015-09-22
Classification: H01Q,H04B

Abstract:
1. A module for a front end of a wireless transmission/reception device, the module comprising: a first antenna for frequencies in a first high-frequency frequency range, a first signal path, which connects the first antenna to a first antenna tuner, connects the first antenna tuner to a first detector that is configured to measure reflected power, and connects the first detector to a first antenna switch, a second antenna for frequencies in a second frequency range, the second frequency range including lower frequencies than the first high-frequency frequency range, a second signal path, which connects the second antenna to a second antenna tuner, connects the second antenna tuner to a second detector that is configured to measure reflected power, and connects the second detector to a second antenna switch, a controller configured to take signals supplied by the first and second detectors as a basis for producing control signals for controlling the first and second antenna tuners, wherein the controller has a comparator configured to compare the signals from the first and second detectors in order to produce a correction value as a measure of a drop below a threshold value for the reciprocal isolation between the first and second signal paths, wherein the control signals are formed from a combination of the correction value and the signal from an active detector arranged in an active signal path, wherein the active detector is the first detector when the first signal path is the active signal path and wherein the active detector is the second detector when the second signal path is the active signal path, wherein one of the first signal path or second signal path has a selectively connectable supplementary filter, and wherein the supplementary filter is connected to one of the signal paths only when the reciprocal isolation between this signal path and the active signal path drops below the threshold value.