truck tracking webfleet solutions

Home > NEWS > Other information > truck tracking webfleet solutions

Company News

Industry News

The main factors that affect the performance of GPS antennas are the following.trailer gps tracker wholesale

source:truck tracking webfleet solutions release time:2023-06-28 Hits:     Popular:realtime gps tracker online

  

  1. Ceramic flakes: The quality of ceramic powder and sintering process directly affect its performance. The main ceramic chips currently used on the market are 25 × 25, 18 × 18. 15 × 15. 12 × 12. The larger the area of the ceramic sheet, the greater the dielectric constant, the higher the resonance frequency, and the better the acceptance effect. Ceramic chips are mostly square in design to ensure consistent resonance in the XY direction and achieve uniform star collection.

  2. Silver layer: The silver layer on the surface of a ceramic antenna can affect the resonance frequency of the antenna. The ideal GPS ceramic chip frequency point is accurately set at 1575.42MHz, but the antenna frequency point is very susceptible to the influence of the surrounding environment, especially when assembled in the entire machine. It is necessary to adjust the silver coating shape to maintain the frequency point at 1575.42MHz again. Therefore, GPS equipment manufacturers must cooperate with antenna manufacturers when purchasing antennas and provide complete machine samples for testing.

  3. Feed point: The ceramic antenna collects resonance signals through the feed point and sends them to the backend. Due to antenna impedance matching, the feed point is generally not in the center of the antenna, but slightly adjusted in the XY direction. This impedance matching method is simple and does not increase the cost. Moving only in the single axis direction is called a single biased antenna, and moving on both axes is called a double biased antenna.

  4. Amplification circuit: The shape and area of the PCB carrying the ceramic antenna. Due to the characteristic of ground bounce in GPS, when the background is 7cm × When the ground is 7cm uninterrupted, the efficiency of the patch antenna can be maximized. Although constrained by factors such as appearance and structure, try to maintain a considerable area and uniform shape. The selection of amplification circuit gain must be coordinated with the backend LNA gain. The GSC3F of Sirf requires that the total gain before signal input should not exceed 29dB, otherwise the signal Supersaturation will generate self excitation.

  GPS antenna has four important parameters: Gain, VSWR, Noise figure, and Axial ratio. Among them, special emphasis is placed on the shaft ratio, which is an important indicator to measure the difference in signal gain of the entire machine in different directions. Due to the random distribution of satellites in the hemisphere sky, it is crucial to ensure that the antenna has similar sensitivity in all directions. The axial ratio is affected by antenna performance, external structure, internal circuit of the entire machine, and EMI.


Read recommendations:

portable gps tracker Vendor

4G LTE gps tracker

G07L 4G GPS Tracker

CDMA mobile phone GPS positioning

GPS position difference principle

Last article:GPS selection.Hidden GPS Trackers wholesale

Next article:GPS reference station subsystem.Magnetic gps tracker supplier

Related Information

Dog gps tracker custom

2023-04-11

4G GPS Tracker for vehicles distributors

2023-04-23

obd2 tracker wholesale

2023-03-16

fleet gps tracking wholesale

2023-04-23

Magnetic gps tracker wholesaler

2023-03-16

mini gps tracker supplier

2023-04-23

Cantrack TK100

2023-04-23

gps vehicle tracker Vendor

2023-04-23

gps vehicle tracker price

2023-04-23

car gps tracker manufacturer

2023-04-23

G200(L) -Magnet GPS Tracker

2022-06-20

G07L 4G GPS Tracker

2022-09-06

G06L- 4G Car GPS Tracker

2022-09-06

VSL100 GPS Speed Limiter, Speed Governor

2022-06-19

4G Wired GPS Tracker PCBA

2022-06-17

What are the functions of a car navigator?gps tracker no monthly fee wholesale

2023-04-11

WAP version of mobile phone GPS positioning

2022-10-21

Compared with wired GPS positioner and wireless GPS positioner.gps tracker for trailer manufacturer

2023-04-10

Automobile GPS Global Positioning System

2022-12-09

What should I pay attention to when buying GPS products?

2022-08-10

What is the difference between the car GPS positioner and the car navigator?gps tracker für auto web

2023-03-21

Handheld GPS performance.OBD GPS Tracker distributors

2023-07-17

What are the commonly used car GPS positioner?

2023-02-25

How to prevent the disassembly of the car GPS locator?personal gps tracker manufacturer

2023-03-15

The main features of the GPS vehicle positioning system.gps tracker for trailer Manufacturing

2023-03-28

What are the different types of car GPS?

2023-06-15

GPS components

2022-11-03

How to make the data of the GPS positioner more effective

2023-02-25

GPS Processor (GPSPU)

2022-09-05

What is the difference between GPS positioning manufacturers and in car reverse imaging WiFi and 4G.

2023-06-14