Method and apparatus for maintaining standing wave resonance, impedance matching in the presence of environmental changes, and head / hand effect using variable reactance antenna aperture tuning

摘要

The present disclosure generally relates to any device capable of wireless communication, such as a mobile phone or wearable device, having one or more antennas. Maintaining constant antenna resonant frequency in the presence of environmental changes or head / hand effects by applying a variable reactance (capacitive or inductive component) antenna aperture tuner within a simple scalar antenna aperture tuning system Is obtained. The variable reactance is used to keep the antenna resonant frequency at the desired target frequency in response to external variables. Otherwise, the resonance will be offset from the operating frequency of the device. By adjusting the resonance frequency of the antenna in response to a change induced from the outside, the radiation efficiency of the antenna is maintained. At the same time, transmission loss is minimized by avoiding impedance mismatch between the antenna and the respective transmit / receive paths in the radio.