Description
What is the Marine GPS Antenna Beidou L1 B1 Dual-band Combo Antenna?
The Marine GPS Antenna CTRF-ANTENNA-MA-GPS-BD-126096-N is an RHCP GPS Beidou L1 B1 Dual-band Combo Antenna with standard N-type connector boat antenna manufactured by C&T RF Antennas Inc. for cars, ships, and other moving vehicles.
This Marine GPS Antenna Beidou L1 B1 Dual-band Combo Antenna style has a coaxial cable extender type Outdoor Marine Antenna Active GPS+Beidou Antenna.
Marine GPS Antenna Beidou L1 B1 Dual-band Combo Antenna Product Features
Waterproof, high gain, low standing wave ratio, stable signal, environmentally friendly material, factory direct sales, stable supply.
Specification model: CTRF-ANTENNA-MA-GPS-BD-126096-N
Product name: GPS+Beidou combo antenna
Frequency range: 1575.42±5MHz/1561±5MHz (Beidou II)
Gain: 38dBi
Standing wave ratio: ≤2.0
Input impedance: 50 ohms
Bandwidth: ±10mhz
Polarization method: right-hand circular polarization
Power supply voltage: 2.8~5V
Power supply current: ≤10mA
Enlarged model: AT2659S
Filter model: Murata KE series
Connector model: NJ male or NK female
Feeder Model: RG316 (internal)
Radome Shell material: ABS
Antenna size: 96*126mm
Installation method: pole type mount by U bolt
Weight: ≤200g
Waterproof rating: 100%
Working temperature: -30°℃~+85°℃
Application areas: car navigation, logistics positioning, construction sites, outdoor self-driving, radio enthusiasts, ships sailing, and so on.
The Marine GPS Antenna Beidou L1 B1 Dual-band Combo Antenna is supplied by C&T RF Antennas Inc, the leading internal-external GPS GNSS antenna manufacturer in China.
We provide indoor & outdoor wireless antennas with many antenna types such as Dipole Antennas, Whip Antennas, Marine Antennas, Router Antennas, MIMO Antennas, Combo Antennas, PCB Antennas, FPC Antennas, Spring Antennas, Sector Antennas, Yagi Antennas, etc., for IoT & M2M industries.
C&T RF Antennas Inc provides RF antennas with other antenna radio frequencies such as 169MHz, 230MHz, 315MHz, 433MHz, 868MHz, 915MHz, Lora, NFC, VHF&UHF, NB-IoT, ADS-B, GSM, Wifi 2.4GHz, 5.8GHz, 2G 3G 4G LTE, GPS, GNSS, 5G NR, UWB, Cellular, etc.
Contact us for the Marine GPS Antenna Beidou L1 B1 Dual-band Combo Antenna datasheet, Marine GPS Beidou antenna pricing, and inventory on the GNSS Passive Antenna.
Or the Marine GPS Beidou antenna styles.
The Marine GPS Antenna Beidou L1 B1 Dual-band Combo Antenna Instruction:
The main factors affecting the performance of the Marine GPS antenna Beidou antenna are as follows.
1. Ceramic sheet
The quality of the ceramic powder and the sintering process directly affect its performance. The ceramic sheets currently used in the market are mainly 25×25, 18×18, 15×15, 12×12.
The larger the area of the ceramic sheet, the larger the dielectric constant, the higher the resonance frequency, and the better the receiving effect.
The ceramic sheets are mostly square in design to ensure that the resonance in the XY direction is basically the same, so as to achieve the effect of a uniform star collection.
2. Silver layer
The silver layer on the ceramic antenna surface can affect the antenna resonance frequency.
The ideal frequency point of the Beidou ceramic chip accurately falls on 1561/1615.68±7MHz2, but the antenna frequency point is very easily affected by the surrounding environment, especially when assembled in the whole machine, the frequency point must be adjusted and maintained by adjusting the shape of the silver coating. At 1561/1615.68±7MHz2.
Therefore, when purchasing antennas, Beidou/GPS navigator manufacturers must cooperate with antenna manufacturers and provide complete machine samples for testing.
3. Feed points
The ceramic antenna collects the resonance signal through the feed point and sends it to the back end. 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 direction of a single axis is called a single-biased antenna, and moving in both axes is called a double-biased antenna.
4. Amplifying circuit
The shape and area of the PCB carrying the ceramic antenna. Because the Beidou has the characteristic of ground-bounce when the background is 7cm×7cm uninterrupted earth, the effectiveness of the patch antenna can be exerted to the extreme.
Although restricted by factors such as appearance and structure, try to keep a considerable area and uniform shape.
The choice of the gain of the amplifying circuit must match the gain of the back-end LNA. Sirf’s GSC3F requires that the total gain before signal input should not exceed 29dB, otherwise, the signal will be oversaturated and will cause self-excitation.
The Beidou antenna has four important parameters, gain (Gain), standing wave (VSWR), noise figure (Noise figure), and axial ratio (Axial ratio).
Among them, the shaft ratio is particularly emphasized, which is an important indicator to measure the difference of the signal gain of the whole machine in different directions.
Since satellites are randomly distributed in the hemispherical sky, it is very important to ensure that the antennas have similar sensitivity in all directions.
The axial ratio is affected by the antenna performance, appearance structure, internal circuit of the whole machine, and EMI.
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