Antenna LNA filter for GNSS device
First Claim
Patent Images
1. A low-noise amplifier (LNA) filter comprising:
- a temperature sensor for detecting a temperature of the LNA filter;
a first stage coupled to receive a GNSS signal from a first antenna, wherein the first stage is configured to at least partially filter portions of the GNSS signal outside of a first frequency band, and wherein the GNSS signal has a signal frequency equal to an original frequency value within the first frequency band;
a second stage coupled to receive the GNSS signal from the first stage, wherein the second stage is configured to;
down-convert the frequency of the GNSS signal to a first value lower than the original frequency value, wherein the first value is within a second frequency band and the first value is based at least in part on the temperature of the LNA filter detected by the temperature sensor; and
at least partially filter portions of the down-converted GNSS signal outside of the second frequency band, wherein the second frequency band has a frequency range corresponding to a frequency range of the first frequency band after down-converting; and
a third stage coupled to receive the down-converted GNSS signal from the second stage, wherein the third stage is configured to up-convert the frequency of the GNSS signal to the original frequency value.
1 Assignment
0 Petitions
Accused Products
Abstract
Low-noise amplifier (LNA) filters and processes for filtering global navigation satellite system (GNSS) signals are disclosed. The LNA filters can be used to down-convert a received GNSS signal to a lower frequency, filter the GNSS signal at the lower frequency, and up-convert the GNSS signal to the original frequency of the GNSS signal. The down-converted frequency can be selected based on a temperature of the GNSS signal to compensate for shifts in the frequency response of the filter due to temperature changes.
-
Citations
15 Claims
-
1. A low-noise amplifier (LNA) filter comprising:
-
a temperature sensor for detecting a temperature of the LNA filter; a first stage coupled to receive a GNSS signal from a first antenna, wherein the first stage is configured to at least partially filter portions of the GNSS signal outside of a first frequency band, and wherein the GNSS signal has a signal frequency equal to an original frequency value within the first frequency band; a second stage coupled to receive the GNSS signal from the first stage, wherein the second stage is configured to; down-convert the frequency of the GNSS signal to a first value lower than the original frequency value, wherein the first value is within a second frequency band and the first value is based at least in part on the temperature of the LNA filter detected by the temperature sensor; and at least partially filter portions of the down-converted GNSS signal outside of the second frequency band, wherein the second frequency band has a frequency range corresponding to a frequency range of the first frequency band after down-converting; and a third stage coupled to receive the down-converted GNSS signal from the second stage, wherein the third stage is configured to up-convert the frequency of the GNSS signal to the original frequency value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method for filtering a global navigation satellite system (GNSS) signal, the method comprising:
-
detecting a temperature of a low-noise amplifier (LNA) filter by a temperature sensor; receiving, at a first stage of the LNA filter, a GNSS signal from a first antenna having a signal frequency equal to an original frequency value within a first frequency band; down-converting, by a second stage of the LNA filter, the frequency of the GNSS signal to a value lower than the original frequency value, wherein the value is within a second frequency band and the value is based at least in part on the temperature of the LNA filter detected by the temperature sensor; at least partially filtering, by the second stage of the LNA filter, the down-converted GNSS signal outside of the second frequency band, wherein the second frequency band has a frequency range corresponding to a frequency range of the first frequency band after down-converting; and up-converting, by a third stage of the LNA filter, the frequency of the GNSS signal to the original frequency value. - View Dependent Claims (11, 12, 13, 14, 15)
-
Specification