Antenna module and impedance matching method thereof
An antenna module and impedance matching technology, applied to antennas, devices that make antennas work in different frequency bands at the same time, electrical components, etc.
Inactive Publication Date: 2012-03-14
HTC CORP
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Problems solved by technology
If an antenna of LTE is combined with the original telephone antenna in the future, it needs to cover at least (894-698) / [(894+698) / 2]=25% of the effective operating frequency (effective operating frequency), but due to the current Due to the limitations of mobile phone antennas, such a large bandwidth requirement cannot be achieved
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[0036] In order to make the description of the present invention more detailed and complete, reference may be made to the attached drawings and various embodiments described below, and the same numbers in the drawings represent the same or similar components. On the other hand, well-known components and steps have not been described in the embodiments in order to avoid unnecessary limitations of the present invention.
[0037] Please also refer to figure 1 and figure 2 , figure 1 is a functional block diagram illustrating an antenna module according to an embodiment of the present invention, figure 2 is to draw figure 1 The circuit diagram of the adjustable matching circuit of the antenna module in Fig. As shown in the figure, an antenna module 100 includes an antenna body 110 , an adjustable matching circuit 120 and a control unit 130 . The antenna body 110 has a signal feeding point 112 . The adjustable matching circuit 120 is electrically connected to the signal fee...
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The invention discloses an antenna module and an impedance matching method thereof. The antenna module comprises an antenna main body, a tunable matching circuit and a control unit, wherein the antenna main body is provided with a signal feeding point; the tunable matching circuit is electrically connected to the signal feeding point for providing a load impedance; the tunable matching circuit comprises an inductor, a first tunable capacitor and a second tunable capacitor; one end of the first tunable capacitor is electrically connected to one end of the inductor; one end of the second tunable capacitor is electrically connected to the other end of the first tunable capacitor and the signal feeding point; the other end of the second tunable capacitor is electrically connected to a system and is grounded; and the control unit is electronically connected to the tunable matching circuit for reading an operation frequency band, accordingly generating a control signal and suitably adjusting capacitance values of the first and second tunable capacitors.
Description
technical field [0001] The present invention relates to an antenna module, and in particular to an antenna module with adjustable load impedance. Background technique [0002] With the evolution of the mobile phone system and its technological advancement, from the early 2G system to the current 3G system and the future LTE (Long Term Evolution) system, where LTE is a MISO (Multi-input Single-out) system, making mobile phones The frequency bands that need to be supported are also increasing and wider. However, in the generally known antenna design, the matching circuit connecting the antenna and the power amplifier cannot be adjusted after the motherboard is assembled, so as to fix its bandwidth characteristic range. [0003] Therefore, when the design is suitable for the LTE system through the known technology, two antenna bodies are required, one of which is used for transmission and reception; the other antenna body is used for reception, but this will occupy too much in...
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IPC IPC(8): H01Q5/00
Inventor 吴维扬马建华林晏诠
Owner HTC CORP