Down-converter Having Matching Circuits with Tuning Mechanism Coupled to 90-Degree Hybrid Coupler Included Therein
First Claim
1. A down-converter, comprising:
- two low-noise amplifiers, for respectively amplifying a first beacon signal and a second beacon signal to generate a first amplified signal and a second amplified signal;
a 90-degree hybrid coupler, for transforming the first amplified signal and the second amplified signal into a first coupler output signal and a second coupler output signal, the 90-degree hybrid coupler comprising;
two input ports, for respectively receiving the first amplified signal and the second amplified signal; and
two output ports, for respectively outputting the first coupler output signal and the second coupler output signal;
two first matching circuits, respectively coupled to the 90-degree hybrid coupler, each first matching circuit having a first tuning mechanism disposed in one side of the first matching circuit and not contacting the first matching circuit, wherein the first tuning mechanism is used for adjusting characteristics of the first matching circuit; and
a down-converting circuit, for down-converting the first coupler output signal and the second coupler output signal.
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Abstract
A down-converter includes two low-noise amplifiers, a 90-degree hybrid coupler, two first matching circuits, and a down-converting circuit. The two low-noise amplifiers respectively amplify a first beacon signal and a second beacon signal to generate a first amplified signal and a second amplified signal. The 90-degree hybrid coupler includes two input ports and two output ports for transforming the first amplified signal and the second amplified signal into a first coupler output signal and a second coupler output signal. The two first matching circuits are respectively coupled to the two input ports or the two output ports of the 90-degree hybrid coupler and each first matching circuit has a first tuning mechanism disposed in one side of the first matching circuit and not contacting the first matching circuit. The down-converting circuit performs a frequency down-conversion on the first coupler output signal and the second coupler output signal.
23 Citations
20 Claims
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1. A down-converter, comprising:
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two low-noise amplifiers, for respectively amplifying a first beacon signal and a second beacon signal to generate a first amplified signal and a second amplified signal; a 90-degree hybrid coupler, for transforming the first amplified signal and the second amplified signal into a first coupler output signal and a second coupler output signal, the 90-degree hybrid coupler comprising; two input ports, for respectively receiving the first amplified signal and the second amplified signal; and two output ports, for respectively outputting the first coupler output signal and the second coupler output signal; two first matching circuits, respectively coupled to the 90-degree hybrid coupler, each first matching circuit having a first tuning mechanism disposed in one side of the first matching circuit and not contacting the first matching circuit, wherein the first tuning mechanism is used for adjusting characteristics of the first matching circuit; and a down-converting circuit, for down-converting the first coupler output signal and the second coupler output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A down-converter, comprising:
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a 90-degree hybrid coupler, having a first input port, a second input port, a first output port, and a second output port; two first matching circuits, respectively coupled to the first input port and the second input port, each first matching circuit having a first tuning mechanism for adjusting characteristics of the first matching circuit; two second matching circuits, respectively coupled to the first output port and the second output port, each second matching circuit having a second tuning mechanism for adjusting characteristics of the second matching circuit; and a down-converting circuit, coupled to the two second matching circuits. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification