GPS systems are more and more widely us←∑ed in our lives. This is i←​≤nseparable from the importa★↓₹nt role of GPS antennas. The≤★Ω₹ following GPS antenna manufacturers will tell y∞↔±Ωou the specific role of GPS antennas.

Do you know the role of GPS antenna

1. It is used to capture satellite¥ s and receive satellite posi$±☆tioning information, that is, to £÷♣radiate and receive e"©÷lectromagnetic waves. Any high-&¶ frequency circuit, as long as it is not com★Ω∑♠pletely shielded, can raα♣εdiate electromagnetic waves t§→'"o the surrounding space more or less, or rec'‍≈★eive electromagnetic&←¥₩ waves more or less from the surrou÷>nding space. According ≥↔÷to the difference of GPS antennas, it can be $​↓≤divided into flat antenna↓☆÷₹s and helical antennas. The h™'♠‌elical antenna has a stronger ability to sear™∑¥λch for stars.

2. Convert the electromag$​εαnetic wave energy of t←♣★he radio signal from the satellite into thΩ₩e current that can be picked up by the recei¥↕ver electronics, that is, energy conversion. G $enerally, for special equipmen ™↔εt or vehicle-mounted equipment↑≥, there is often a certain d→Ω÷istance between the equipment and the GPS rece₹♣iving module, so in the real environment, $☆× a broken line of more than 1 met® er may be used. However, because the fee♠&∏♥der has a lot of loss on the ∏₽↓signal, in this case, only a​ β₩ctive GPS antennas can be selected.

The size and shape of the GPS antenna are very im×÷≤portant, because thes≥®↓e characteristics determine  α "the ability of the antenna to obtain weak GPS sig¥×>nals. GPS satellite signal is divided into L1 $↑and L2, the frequency is 1575.42MHZ and 1228MHZ ×®respectively, among them L1 is the open civilian " signal, the signal is circular polariza∑λtion. The signal strength ✘≥>is about -166DBM, which is a relatively weak $★ signal. According to needs, the antenna can be d←‌esigned to work on a single L1 frequen♠β'cy, or on two frequencies, L1 aφ∞nd L2.