GPS Antenna Product Details

I. Product Overview

The GPS antenna is a core device for receiving satellite signals from the Global Positioning System. It is widely used in scenarios such as car navigation, smart phones, and surveying instruments, providing precise position, speed, and time information for devices. It is a key component for realizing positioning and navigation functions.

Ii. Working Principle

GPS satellites send signals containing information such as position and time to the ground. The GPS antenna receives these weak signals (approximately -166 DBW) and transmits them to the receiver. The receiver calculates the geographical location of the equipment by measuring the time difference of the signal reaching the antenna, combining the satellite position, and applying the triangulation principle.

Iii. Product Classification

In terms of polarization mode: The mainstream is circular polarized antennas, which can better receive satellite signals from different directions. Vertical polarization antennas are less applied.

By placement method: The built-in antenna is used for small devices and should be kept away from interference sources. External antennas are suitable for scenarios with high signal requirements or poor internal environments, such as in-vehicle devices.

By power supply mode: The active antenna with LNA amplifier can enhance the signal and is suitable for weak signal environments. Passive antennas have a simple structure and low cost, and are used in scenarios with good signals.

Iv. Core Performance Parameters

Gain: It measures the signal amplification capability, with a common range of 2-5 dbic.

Standing wave: It reflects impedance matching. The standing wave ratio of high-quality antennas is less than 1.5:1.

Noise figure: It reflects the degree of introduced noise and is generally between 1.5 and 2.5dB.

Axis ratio: It measures the gain difference of the antenna for signals in different directions. The smaller, the better.

V. Structure and Composition

It is mainly composed of ceramic antennas, low-noise signal modules (only available for active antennas), cables and connectors. Ceramic antennas are the core, and their performance affects signal reception. The low-noise signal module is responsible for amplification and filtering. Cables and connectors ensure stable signal transmission.

Vi. Application Fields

It covers fields such as transportation (in-vehicle navigation, logistics monitoring, etc.), surveying, mapping and geographic information, intelligent terminals (mobile phones, smartwatches), agriculture and forestry (precision agriculture, forestry monitoring), as well as monitoring and early warning (earthquake, bridge deformation monitoring).

Vii. Product Advantages

It has the advantages of high-precision positioning, strong anti-interference, high sensitivity, good stability and strong compatibility, and can meet the needs of various scenarios.

Viii. Selection Suggestions

Select the appropriate GPS antenna based on factors such as application scenarios (indoor, vehicle-mounted, outdoor, etc.), device interfaces and dimensions, and performance parameters (accuracy, sensitivity, anti-interference).