In simple terms, the working principle of ceramic antenna can be divided into two parts: transmitting antenna and receiving antenna. Both extract pseudo-random noise code and data code from satellite signals to calculate navigation information such as the position, speed and time (PVT) of the receiver carrier. Recently, patch ceramic antennas are very popular. In addition to navigation, what else can they be used for? Let me tell you:

Ceramic antenna

Now many CMMB mobile TV terminals or wireless network cards usually pull out metal rod antennas when they are used in order to receive signals more sensitively. The rod antenna may make the originally delicate and compact device look inconsistent, or even break the antenna. Therefore, the use of patch ceramic antennas can replace traditional rod antennas, making the device appearance less cumbersome.

The patch ceramic antenna has a small size, such as 35mm×5mm×1.2mm, 10.5mm×15.5mm×1.2mm; it can cover the entire UHF band of 470MHz~860MHz, up to 1.1GHz, with a 50Ω unbalanced interface, an operating temperature range of -40℃~+85℃, and omnidirectional linear polarization.

Ordinary high dielectric constant ceramics have relatively large losses, but the high dielectric constant ceramics used in patch ceramic antennas have low dielectric loss factors and are easy to tune to cover the entire UHF band. The operation of ceramic antennas requires a digital tuning circuit. The tuning circuit generates a suitable tuning impedance through different combinations of reactor bypass switches to select different frequency bands, and the switch part uses cheap PIN diodes. The tuner is easy to operate, does not require complex control signals and receiving software, can withstand GSM noise, has good temperature stability, low cost, and small size.

Therefore, in addition to being installed in navigation equipment for navigation, the chip ceramic antenna can also replace the traditional telescopic antenna; when laying out the antenna, other components should not be too close to the antenna, and other components should not be placed above or below the antenna to prevent the metal inside the component from affecting signal reception. When mounting, the antenna must be fixed with bottom filling glue to provide the necessary mechanical strength to prevent the chip ceramic antenna from falling off.