Three ICT guides teach you how to choose a GPS antenna

The vast majority of GPS antennas are right-hand-polarized ceramic media, and their components are: ceramic antennas, low-noise signal modules, cables, and connectors.

The ceramic antenna is also called passive antenna, dielectric antenna, PATCH, which is the core technology of GPS antenna. The signal reception capability of a GPS antenna depends largely on the ingredients of its ceramic components.

The low noise signal module, also called LNA, is the part that amplifies and filters the signal. The selection of its components is also very important, otherwise it will increase the reflection loss of the GPS signal and cause excessive noise.

The choice of cable should also be based on the reduction of reflections to ensure the impedance matching.

GPS antenna selection
1.GPS can't be 100% positioned, let alone believable indoor positioning, GPS is not like mobile broadcasting, can receive signals everywhere, many things will affect the GPS reception, including the distribution of sky stars, buildings, viaducts, radio waves, leaves , insulation paper, etc., will affect too many things too much, in general, looking up from the gps position, you can see the area of ​​the sky, that is, gps can receive the signal area.

2. Do not use one or two or one or two days to decide whether or not GPS is good or bad. As the state of the sky satellites varies from day to day, perhaps the same place, full morning reception, but it cannot be located at night, it is possible, and it is possible. For a few days, the positioning status is not good.

3. Comparing the quality of gps must be compared with the same place at the same time - a lot of people will buy new gps and they will say that the one that I used before was better, but this is said to be correct, because the time and place are different. The result is a lot worse. It must be used for a long time or at the same time to feel the difference between the two gps.

4. GPS reception strength table, already insufficient as a GPS purchase reference - we buy gps, will only look at the electronic map in the reception table, before may be quite accurate, but now gps, in order to let the receiving table look It looks good, so there are false signals, or simulated signals, etc. The reception form is really beautiful, but it may not be accurate or even display correctly.

5. There is no so-called indoor positioning gps - basically there is no signal in the room or no signal, real indoor positioning, starting from the coldstart in the room, but the same positioning, is the real indoor positioning, but basically no significance in indoor positioning Because I will not navigate at home.

6. Buy gps, you do not need to choose the brand for the purchase, but you can choose to use the chip internally - basically, do a lot of gps manufacturers, select manufacturers only consider after-sales service only, not the big plant to receive the news will be the best, generally Said that the same chip gps, different manufacturers to do, the effect will not be much different, so choose gps not choose the factory card, you can choose gps receiver chip.

7. In the end to use Bluetooth, CFgps, or gpsmouse? - In general, this is a matter of opinion, using Bluetooth or CF, you must worry about gpsorpda no power at any time, and the cost is higher, but you can navigate anytime, anywhere, use Gpsmouse is an economical and good news, do not have to worry about power problems, but wired troubles.

8. Inaccurate positioning is not necessarily the fault of the GPS - Basically, the positioning error can be within 20 meters, which is considered a good GPS. In addition, the GPS location is not very accurate on the road. The reason may be many, may cause bad reception, resulting in The error may be due to problems with the map data, or it may be because the road is very wide, so it seems that the GPS seems to stably offset the road. After a long time, you will know whether it is a problem of GPS or map.

9. Purchase gps, specification table is for reference only-gps specification what to do within a few seconds to complete the positioning, what is the error of several meters, sensitivity and other information, these are written well, to really use to know, really, compare specifications Table is a waste of time.

10. Use GPS, do not charge communication fees - although everyone knows, but some people still think that they have to pay another monthly fee.

11. When the store owner says that xxxgps is not good, don't trust it too much - it may be that the store does not sell, or that there is more inventory of other items. It is recommended that you buy another gps.

12. GPS can be placed in the car to put the car - in addition to an external antenna, such as gpsmouse this type of thing, can put the car inside the car, because gps although waterproof, but long-term on the outside, it is inevitable there will be hanging points At the time of getting on and off the train, you have to collect it and put it on the outside. If you leave it on the outside, it will be taken away. You are advised to carefully select the hot tissue or cut a hole in the hot tissue. It will be ugly.

13. If the GPS is new for the first time, or is already coldstart state, please go to the empty spot at the fixed point for positioning outside the car - so that the positioning speed is faster, and there will be no strange phenomenon, if coldstart In the state of direct access, even if the signals are strong, it may not be possible to reach the destination!! This is very important. After positioning, put it in the car and see if the car reception will be worse. In addition, the longer a single gps is used, the longer it takes to save satellite data. If it is not used for a long period of time, such as one or two weeks, GPS may recover to coldstart. The above is for those who just came into contact with satellite navigation. I hope that with these psychological preparations, I will not feel that satellite navigation is not easy to use. Basically, as long as I can reach my destination, satellite navigation is a very good thing for you. As for whether there is more time-saving or not, the distance is not too short. Don't ask for too much. Basically, you can go to a strange place, as long as you can get to the place, maybe there will be some ridiculous planning in the journey. Take some time, but over time, you will understand the characteristics of the current satellite navigation, it will not be so upset, of course, map makers still need to work hard, but hope that we can give manufacturers appropriate encouragement, buy genuine is the best support