A method for performing dynamic impedance matching in different operating bands, comprising: switching an impedance matching circuit of a communication apparatus to an operating band, said impedance matching circuit comprising a plurality of adjustable elements (Z1, Z2, Z3, Z4) having different sensitivity with respect to the impedance matching in said operating band; applying a first number of tuning voltages to a first adjustable element of said adjustable elements and selecting one tuning voltage from the first number of tuning voltages as an operating voltage of the first adjustable element; and applying a second number of tuning voltages to a second adjustable element of said adjustable elements and selecting one tuning voltage from the second number of tuning voltages as an operating voltage of the second element, wherein the first number is different from the second number; wherein the first number is greater than the second number, the first adjustable element has a higher sensitivity with respect to the impedance matching in said operating band meaning that it has a greater influence on the effect of impedance matching with respect to the operating band than that of the second adjustable element which has a lower sensitivity with respect to the impedance matching in said operating band meaning that it has a lesser influence on the effect of impedance matching with respect to the operating band, the method further comprising: determining to start tuning with the first element according to the information on the operating band and the information on the sensitivity of the first adjustable element and the second adjustable element with respect to the impedance matching in the operating band; wherein the step of applying the second number of tuning voltages comes after the step of applying the first number of tuning voltages; the information on the sensitivity of each adjustable element with respect to the impedance matching in the operating band being the influence on signal intensity when tuning is performed on said adjustable element, said information being obtained through experiments or computer simulation and recorded in the communication apparatus. switching an impedance matching circuit of a communication apparatus to an operating band, said impedance matching circuit comprising a plurality of adjustable elements (Z1, Z2, Z3, Z4) having different sensitivity with respect to the impedance matching in said operating band; applying a first number of tuning voltages to a first adjustable element of said adjustable elements and selecting one tuning voltage from the first number of tuning voltages as an operating voltage of the first adjustable element; and applying a second number of tuning voltages to a second adjustable element of said adjustable elements and selecting one tuning voltage from the second number of tuning voltages as an operating voltage of the second element, wherein the first number is different from the second number; wherein the first number is greater than the second number, the first adjustable element has a higher sensitivity with respect to the impedance matching in said operating band meaning that it has a greater influence on the effect of impedance matching with respect to the operating band than that of the second adjustable element which has a lower sensitivity with respect to the impedance matching in said operating band meaning that it has a lesser influence on the effect of impedance matching with respect to the operating band, the method further comprising: determining to start tuning with the first element according to the information on the operating band and the information on the sensitivity of the first adjustable element and the second adjustable element with respect to the impedance matching in the operating band; wherein the step of applying the second number of tuning voltages comes after the step of applying the first number of tuning voltages; the information on the sensitivity of each adjustable element with respect to the impedance matching in the operating band being the influence on signal intensity when tuning is performed on said adjustable element, said information being obtained through experiments or computer simulation and recorded in the communication apparatus. determining to start tuning with the first element according to the information on the operating band and the information on the sensitivity of the first adjustable element and the second adjustable element with respect to the impedance matching in the operating band; wherein the step of applying the second number of tuning voltages comes after the step of applying the first number of tuning voltages; the information on the sensitivity of each adjustable element with respect to the impedance matching in the operating band being the influence on signal intensity when tuning is performed on said adjustable element, said information being obtained through experiments or computer simulation and recorded in the communication apparatus.