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Mobile Signal Boosters

GSM Signal Booster

3G Signal Booster

Band Selective Repeater

4G Signal Repeater

5G Signal Booster

Multi Band Repeater

Cell Phone Signal Repeater

Dual Band Repeater

Tri Band Repeater

Mobile Signal Repeater

Cell Phone Signal Amplifier

Dual Band Signal Booster

Signal Booster Antenna

Signal Booster Coaxial Cable

Signal Booster Accessories

WIFI Repeater Amplifier
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About us
China Shenzhen Atnj Communication Technology Co., Ltd.
Shenzhen Atnj Communication Technology Co., Ltd.
Shenzhen ATNJ Communication Technology Company, a professional RF factory mainly engaged in R&D, production, manufacturing, sales，technical service
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01
100% SERVICE
ATNJ provide 7x24 online service here. Meanwhile ,you can contact us for knowing the detail by the above contact info to the real-time calling or video of the factory. (Working time:8:30 --18:00 China GMT+8:00)
02
MANUFACTURING
ATNJ have itself factory with advanced automatic machines, strictly process control system and can manufacture the repeater to meet your demand.
03
Multi-platform presentation
ATNJ products hot sale in different kind online platform like Ebay, Amazon,Aliexpress,Alibaba, Made in China ,etc. Meanwhile providing repeater for many famous dropshipping online store in google for years.
04
Rich in Repeater categories
ATNJ provided rich kind of repeater system for customer choice.Pico/High power gsm 2G,3G, LTE4G, NR 5G signal repeater,Digital and Optical Fiber repeater.
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Latest company news about ATNJ develop new product in Telecom field----SDR card
2024-08-15

ATNJ develop new product in Telecom field----SDR card

Software Defined Radio (SDR) board refers to a hardware device with programmable and flexible wireless radio functions. SDR technology enables users to configure and control signal processing and modulation/demodulation processes of wireless radio devices through software, without the need to change the hardware structure. SDR core PCBA board features: 1. SDR platform consisting of FPGA and RF direct acquisition transceiver. 2. 100K logic resources, 424 18*18 multipliers, resource-rich FPGA. 3. 4T4R 14-bit ADC and DAC RF direct sampling transceiver . 4. Working frequency: 400MHz~8000MHz. 5. Large scanning bandwidth, currently supports the maximum sampling bandwidth of 160MHz per channel; It can be designed to support a maximum sampling bandwidth of 800MHz per channel. 6. 32 bit high-precision frequency control. 7. Each RF channel, input and output have DSA built-in, and the attenuation range is 0~31dB. 8. No LO leakage and I/Q imbalance.   Typical Application： Public network 3G, 4G, 5G, TDD and FDD mobile communications, signal monitoring systems, other radio radar and detection, private network communication systems, etc. SDR boards are widely used in communication, wireless radio spectrum monitoring, RF testing, education, and research fields, providing users with flexible, customizable, and high-performance wireless radio solutions.
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Latest company news about What is a Cell Phone Repeater?
2023-04-25

What is a Cell Phone Repeater?

What is a Cell Phone Repeater?   A cell phone repeater (also known as cellular repeater, amplifier, or cell signal booster) is a device used to improve cell phone reception in an indoor outdoor environment. A cell phone repeater is typically made up of three primary components: A "donor" antenna - also called a "reception" antenna A bi-directional signal amplifier One or more rebroadcast antennas Cell phone repeaters are most often installed inside buildings, and are used to bring signal from outdoors into the structure, negating attenuation of RF signal caused by the building materials. In-building cell phone repeater systems typically use an outdoor donor antenna to transmit and receive signal from the nearest cellular signal. The outdoor donor antenna is connected via coaxial cable to an amplifier unit which amplifies the signal, and retransmits it locally via one or more indoor antennas, providing improved signal strength inside the building. Smaller cell phone repeaters are also used inside vehicles, boats, and recreational vehicles to improve reception for users. For more information on available cell phone booster kits and antennas, read our cell phone booster guide. How Cell Phone Repeaters Work The active component of cell phone repeaters is the bi-directional signal amplifier. A bi-directional amplifier amplifies signal in both the uplink and downlink directions. This allows cell phones served by the rebroadcast antennas to both send and receive data from nearby cell towers. A bi-directional amplifier typically contains the following components: Diplexers or power splitters to split signal into multiple bands. Duplexer filters to separate the uplink and downlink blocks within bands. Amplifiers The block diagram below shows a typical layout of a dual-band bi-directional amplifier:   Requirements for Operation In order to use a cell phone repeater to improve signal coverage, two primary requirements must be met: Adequate donor signal Adequate isolation between donor and rebroadcast antennas Adequate donor signal All RF amplifiers add noise to the existing noise floor from the donor signal. The additional noise added by an amplifier is referred to as its "noise figure." For most amplifiers, this is between 6 dB and 8 dB. In order for a cellular repeater to operate correctly, the signal-to-noise ratio (SNR) of the donor signal must be greater than the noise figure of the amplifier. Without adequate signal at the donor antenna location, no improved signal will be experienced by users. Isolation between antennas For correct operation of a cellular repeater, the isolation between the donor and indoor antennas must be greater than the gain of the amplifier. If adequate isolation does not exist, amplifier feedback effects will cause "oscillation." In the US, the FCC requires that all consumer-rated boosters include automatic gain control (AGC). AGC reduces the gain of bi-directional amplifiers to ensure that the amplification is always lower than the path loss isolation between the outdoor an indoor antenna. The FCC requires that If a device is unable to control oscillation effects by utilizing AGC, it must detect the oscillation and automatically shut down.
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