Questions tagged [gps]
stands for Global Positioning System, a satellite based navigation system
468 questions
0
votes
1
answer
76
views
ESP32-S3 IoT board design review — UART flashing and signal interfacing concerns
I’ve designed a custom IoT board based on the ESP32-S3-WROOM-1, and I would like to have the schematic and PCB reviewed before fabrication.
Main features:
4× PC817 optocouplers for reading 24 V square-...
0
votes
0
answers
66
views
Design review request for a GPS tracker Project
Premise:
I am trying to build a GPS tracker using the Teseo-LIV3F GNSS module. Since this is my first time dealing with RF components, please let me know whether the layout and design are good enough ...
0
votes
1
answer
86
views
Schematics Review, GPS module with a custom bias-tee and an active antenna
Description:
This is a simple GPS module design based on the TESEO-LIV3F from STMicroelectronics.
Review request:
I’m particularly concerned about the bias-tee section and the chosen LC values. I’m ...
- 113
7
votes
7
answers
2k
views
Protecting against GPS jamming via directional antenna
The repeated GPS jamming and spoofing around Russia's western territories has hit the news again. I can't help but wonder why it is so effective.
It is my understanding that a GPS signal always comes ...
- 199
2
votes
2
answers
168
views
Schematics Review, I designed this GPS module with a custom bias-tee and an active antenna
Project Description: A hand-held GPS device with a built-in screen.
I designed the schematics for the GPS part of the system, I made a custom simple bias-tee (since bias-tee modules on digikey are ...
- 113
1
vote
1
answer
85
views
How do I wire an antenna to my ST GPS module? I do not understand how to receive RF signal while powering the antenna
I am making a modular handheld GPS device, and I am using STM32 MCU as the platform. These are my parts: RF Female Connector, Antenna, GPS.
This is my schematic:
My issue is this. The antenna needs ...
- 113
-2
votes
1
answer
189
views
GPS module circuit
My GPS module schematic is not working. Here's the description of it:
An AMS1117-3V3 voltage regulator is used to convert a higher input voltage down to 3.3V for powering the GPS module and ...
- 27
4
votes
1
answer
102
views
How synchronous are two GNSS receivers?
I'm not sure if this is the right place to post this, but I'm dealing with PPS (pulse per second) signals at the end of the day.
I am working with multiple GNSS receivers (from different manufacturers,...
- 49
2
votes
1
answer
139
views
Is it possible to use two (or more) antennas to ensure good transmission/reception?
I'm a junior EE working on an avionics system for a model rocket. I'm trying to implement telemetry. The telemetry should send flight data (IMU, power, etc.) along with GPS location data, to the ...
- 87
-1
votes
1
answer
120
views
GPS and time zone changes [closed]
(As it turns out from the comments this is really not an EE question, but a political question about adherence to timezones. I'm still going to leave this question up to show my ignorance)
Yesterday ...
- 296
2
votes
1
answer
170
views
Identification of component on GPS card
I'm trying to understand the functioning of a GPS receiver. The one that I have is the reference AG-372 made by Trimble. The upper card (the one with antenna) is made by MICRO-ANT (https://micro-ant....
- 133
3
votes
1
answer
324
views
Identification of component on GPS antenna
I'm trying to understand the functionning of a GPS receiver. The one that I have is the reference AG-372 made by trimble.
The upper card (the one with antenna) is made by MICRO-ANT (https://micro-ant....
- 133
1
vote
2
answers
118
views
RF PCB ground pouring advice
I am designing a 4 layer RF PCB that includes GPS and Bluetooth antenna. I have assigned the layers as follows:
L1- Signal+Power
L2- Solid ground
L3- Power
L4- Signal
In layer 3 I've routed the power ...
- 95
4
votes
0
answers
144
views
GPS module antenna tuning
I'm designing a PCB flight timer which incorporates a surface mount GPS module. The GPS module has an integrated antenna. I am having trouble tuning the integrated antenna to the correct frequency (...
- 41
2
votes
1
answer
405
views
How to calculate noise power for an entire RF Band
If I receive the entire L-band and feed it to an IC, what will be the input power assuming no interference? I know noise will dominate, but how can I calculate a rough estimate of it?
The thermal ...
- 37