Method for determining impedance matching network in antenna circuit and antenna circuit
An impedance matching network, antenna circuit technology, applied in impedance networks, multi-terminal pair networks, electrical components, etc., can solve the difficulty of impedance matching and debugging two or more parameters, and it is impossible to calibrate whether the impedance matching state is achieved, which is difficult to achieve. Impedance matching and other issues to achieve the effect of simplifying the process of parameter debugging
Active Publication Date: 2021-03-19
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
[0010] However, the inventors found in the process of realizing the present invention that there are at least the following problems in the prior art: In an impedance matching network containing two or more adjustable parameters, especially when there is a large gap between the theoretical value and the actual value When there is a difference, it is difficult to adjust two or more parameters in the impedance matching process
And in the debugging process, when there is an error in the calculation of the parameters or in the impedance measurement of the circuit, it may not be possible to calibrate whether the impedance matching state is reached when debugging the parameters, making it difficult to achieve impedance matching
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[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0059] In order to simplify the parameter debugging process of the antenna circuit, the embodiments of the present invention provide a method for determining an impedance matching network in the antenna circuit and an antenna circuit.
[0060] An embodiment of the present invention provides a method for determining an impedance matching network in an antenna circuit, wherein the equivalent circuit of the antenna circuit includes: a signal source circuit, a load...
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The embodiment of the invention provides a method for determining an impedance matching network in an antenna circuit, and the antenna circuit. The impedance matching network only comprises an adjustable capacitor used for adjusting an impedance imaginary part of a load circuit, and through the adjustable capacitor, the impedance imaginary part of the load circuit is adjusted to enable the impedance imaginary part of the load circuit to be matched with the impedance of a signal source, and therefore the impedance matching of the whole antenna circuit is completed. Therefore, according to the embodiment of the invention, the impedance matching can be realized only by adjusting one parameter, so that the parameter debugging process is simplified.
Description
technical field [0001] The invention relates to the technical field of antenna circuits, in particular to a method for determining an impedance matching network in an antenna circuit and the antenna circuit. Background technique [0002] Impedance matching in the antenna circuit refers to a working state in which the load impedance and the signal source impedance are adapted to each other to obtain the maximum output power. [0003] In the antenna circuit, impedance matching is a necessary condition for the normal operation of the antenna. Such as figure 1 As shown, the equivalent circuit of the antenna circuit in the prior art includes: a signal source circuit, an L-shaped impedance matching network circuit and a load circuit. [0004] Among them, the signal source circuit includes: antenna coil, figure 1 Middle V S , R S , L S Both are equivalent models of the antenna coil. Among them, V S is the ideal power supply model equivalent to the antenna coil, L S is the ...
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IPC IPC(8): H03H7/38
CPCH03H7/38
Inventor 左勇陈俊达郑文浩张锦南伍剑谭泽斌万艺航
Owner BEIJING UNIV OF POSTS & TELECOMM