Antenna LNA filter for GNSS devices
First Claim
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1. A low-noise amplifier (LNA) filter comprising:
- a first LNA stage having a first input and a first output, wherein the first input is configured to electrically connect to an antenna configured to receive global navigation satellite system (GNSS) signals, and wherein the first LNA stage includes a first LNA and a ceramic filter;
a second LNA stage having a second input and a second output, wherein the second input is electrically connected to the first output, and wherein the second LNA stage includes a second LNA and a first surface acoustic wave (SAW) filter; and
a third LNA stage having a third input and third output, wherein the third input is connected to the second output, and wherein the third LNA stage includes a third LNA and a second SAW filter.
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Abstract
A low-noise amplifier (LNA) filter for use with global navigation satellite system (GNSS) devices is disclosed. A first LNA stage, which is configured to connect to an antenna configured to receive GNSS signals, includes an LNA. A second LNA stage, which is connected to the output of the first LNA stage, has a surface acoustic wave (SAW) filter and an LNA. A third LNA stage, which is connected to the output of the second LNA stage, also has a SAW filter and an LNA.
31 Citations
21 Claims
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1. A low-noise amplifier (LNA) filter comprising:
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a first LNA stage having a first input and a first output, wherein the first input is configured to electrically connect to an antenna configured to receive global navigation satellite system (GNSS) signals, and wherein the first LNA stage includes a first LNA and a ceramic filter; a second LNA stage having a second input and a second output, wherein the second input is electrically connected to the first output, and wherein the second LNA stage includes a second LNA and a first surface acoustic wave (SAW) filter; and a third LNA stage having a third input and third output, wherein the third input is connected to the second output, and wherein the third LNA stage includes a third LNA and a second SAW filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A global navigation satellite system (GNSS) device comprising:
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a radio frequency (RF) front-end comprising; a first signal path having a first LNA stage comprising a first LNA and a ceramic filter, a second LNA stage comprising a second LNA and a first SAW filter, and a third LNA stage comprising a third LNA and a second SAW filter; and a second signal path having a fourth LNA and a plurality of filters; a first antenna coupled to the first signal path and configured to receive GNSS signals; and a second antenna coupled to the second signal path and configured to receive GNSS signals. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification