source:truck tracking webfleet solutions release time:2022-09-27 Hits: Popular:realtime gps tracker online
The function of the GPS receiving antenna is to convert the electromagnetic wave energy of the radio signal from the satellite into the current that the receiver electronic device can ingest and apply. The size and shape of the antenna are important because these characteristics determine the antenna's ability to pick up weak GPS signals. As required, the antenna can be designed to work on a single L1 frequency, or it can work on two frequencies, L1 and L2. Since GPS signals are circularly polarized waves, all receiving antennas are circularly polarized. Despite various constraints, there are still many different antenna types, such as monopole, dipole, helical, quadrifilar helical, and microstrip antennas.
There are generally two types of built-in antennas for GPS receivers we see on the market - flat-panel antennas and four-armed helical antennas. What are the advantages and disadvantages of the two antennas? Let us answer them for you.
Panel antennas are the most common type of antenna due to their durability and relative ease of fabrication. Its shape can be round, square or rectangular, like a copper-clad printed circuit board. It consists of one or more pieces of metal, so the most common shape for GPS antennas is a lumpy knot, like a biscuits. Since the antenna can be made small, it is suitable for aerospace applications and personal handheld applications.
Another major characteristic of an antenna is its gain pattern, or directivity. Using the directivity of the antenna can improve its anti-dry and anti-multipath ability. In precise positioning, the stability of the phase center of the antenna is a very important index. However, in ordinary navigation applications, people hope to use an omnidirectional antenna to receive at least the visible satellite signals in all the sky within a field of view of five degrees above the antenna horizon. However, when the flat-panel antenna is directly above the satellite, the signal gain is the largest. , there are two problems:
1. The receiving range of the tablet is above the tablet, and the tablet should face the sky, which will bring trouble to hand-held and vehicle-mounted. We can see that there are more and more CF receivers with adjustable angles (foldable SDGPS), because the tablet The characteristic of the type antenna makes the manufacturer come up with a trick for the receiver to have a better reception effect.
2. We know that although the satellite signal above our head is better and easier to lock, the satellite above is actually the most useless. If there is no low-angle satellite, the error will be relatively high, and the accuracy will be very high. Difference. So based on these shortcomings, four-arm helical antennas have also been used on GPS receivers.
Read recommendations:
Last article:GPS Quadrifilar Helix Antenna (Quadrifilar Helix Antenna)
Next article:GLONASS and Galileo systems
Related Information
Gps speed limiter Production
2023-04-23Pet GPS Tracker manufacture
2023-03-16gps tracker for bike Factory
2023-04-23gps tracker app
2023-04-11Magnetic gps tracker Vendor
2023-04-23fleet gps tracking supplier
2023-04-23GPS Trackers sales
2023-04-114G GPS Tracker for vehicles Production
2023-04-234G GPS Tracker manufacture
2023-04-23Pet GPS Tracker wholesale
2023-03-16G09L -6 inch Tail light tracker
2022-06-20G06L- 4G Car GPS Tracker
2022-09-06G03
2022-06-213000mAh Magnet Asset GPS Tracker
2025-03-314G Wired GPS Tracker PCBA
2022-06-17GPS Basics
2022-07-11What is the form of car GPS positioning system
2022-08-12GPS navigation solution
2023-02-10What should I pay attention to when buying GPS products?
2022-08-10How to effectively control the risk of car loan companies?
2023-02-16The manufacturer shared the function of GPS navigation with everyone.gps tracker with magnet price
2023-06-17The functions of GPS locators.gps tracker with magnet maker
2023-06-25Car GPS Navigation System
2022-11-04mini gps tracker.Can car GPS locators be installed on motorcycles
2023-10-24There are problems that occur on the four hardware of GPS.obd2 gps tracker verizon distributors
2023-04-14GSM function of GPS.gps tracker no monthly fee Production
2023-08-15What should be considered in addition to the positioning and navigation performance when choosing GP
2022-10-28GPS application in agriculture.realtime gps tracker online manufacture
2023-04-24GPS positioning system prospects
2023-06-02gps vehicle tracker.Automotive GPS positioning software and global positioning system satellites
2023-11-11