Patent ID: 9698484
Date: 2017-07-04
CPC Classifications: H01Q,H04B

Claim:
1. A method for automatically adjusting n tunable passive antennas, where n is an integer greater than or equal to 2, each of then tunable passive antennas comprising at least one antenna control device, one or more characteristics of said each of the n tunable passive antennas being controlled using said at least one antenna control device, said at least one antenna control device having at least one parameter having an influence on said one or more characteristics, said at least one parameter being adjustable by electrical means, the method comprising the steps of: applying excitations to m user ports, where m is an integer greater than or equal to 2, one and only one of the excitations being applied to each of the user ports, each of the excitations having one and only one complex envelope, the m complex envelopes of them excitations being linearly independent in the set of complex functions of one real variable, regarded as a vector space over the field of complex numbers, the m user ports presenting, at a given frequency, an impedance matrix referred to as the impedance matrix presented by the user ports; estimating q real quantities depending on the impedance matrix presented by the user ports, where q is an integer greater than or equal to m, by utilizing the m excitations; utilizing the q real quantities depending on the impedance matrix presented by the user ports, to obtain tuning control signals; and applying each of the tuning control signals to one or more of the antenna control devices, each of said parameters being mainly determined by one or more of the tuning control signals.