Branch-line coupler with four bands applied in LTE-Taiwan and GPS
The present invention relates to a branch-line coupler, particularly applied in a system of 4G LTE-Taiwan and a global positioning system (GPS). The branch-line coupler is developed by double-sideband [pi] equivalence of a conventional branch-line coupler and using a multiband circuit to replace a [...
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| creator | TANG, EN-HAO TSENG, CHEN-TUNG LIN, IH-SIEN WANG, LO-KANG |
| description | The present invention relates to a branch-line coupler, particularly applied in a system of 4G LTE-Taiwan and a global positioning system (GPS). The branch-line coupler is developed by double-sideband [pi] equivalence of a conventional branch-line coupler and using a multiband circuit to replace a [pi] -equivalent admittance value jB. The branch-line coupler with four bands includes a main body and four multiband circuits each separately coupled to a first input port, second input port, a third output port and a fourth output port. Each of the multiband circuits further comprises first, second, third and fourth band circuits all connected in series. Thus, the circuit size for the branch-line coupler can be miniaturized for further application in a system of 4G LTE-Taiwan and a global positioning system. |
| format | Patent |
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| language | chi ; eng |
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| subjects | BASIC ELECTRIC ELEMENTS ELECTRICITY RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE WAVEGUIDES |
| title | Branch-line coupler with four bands applied in LTE-Taiwan and GPS |
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