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  Phased Array Radar is an advanced radar technology that uses electronic control to direct the beam. By altering the phase differences among the individual radiating elements in the antenna array, it can rapidly scan and direct the beam without the need for mechanical rotation of the antenna. The following are its core features and working principles:   Core principle: Phase control:   A large array composed of numerous small antenna elements (antennas) is formed. Each antenna element independently transmits and receives signals. By adjusting the phase difference of the signals of each antenna element, the electromagnetic waves are superimposed and enhanced in a specific direction (beamforming), while being cancelled out in other directions, achieving electronic steering of the beam.   Beam flexibility:   The beam can switch directions in microsecond-level, supporting multi-target tracking and rapid scanning (such as simultaneously monitoring multiple areas). It can dynamically allocate beam resources (for example: some array elements track the target, while others search for new targets).   Type:   Active phased array (AESA):   Each array element integrates an independent transmitting/receiving module (T/R component), which ensures high reliability and strong anti-interference capability. Applications: Modern fighter jets (such as F-35), early warning aircraft (such as Air警-500)， missile defense systems.   Passive Phased Array (PESA):   Using a single transmitter and controlling the beam through a phase shifter, this method is cost-effective but has limited functionality. Application: Early radar systems (such as the radar of the Russian S-300).   advantage:     Fast Response: The beam switching speed is much faster than that of mechanical scanning radar. Multi-tasking Capability: It can simultaneously perform functions such as search, tracking, and communication. Anti-interference: Interference directions can be suppressed through adaptive nulling. Stealth Detection: High sensitivity, capable of detecting stealth aircraft and other low-observable targets.   Typical application:     Military: Missile guidance, shipborne air defense (such as the US "Aegis" system), airborne fire control radar. Civilian: Weather radar (for monitoring severe convective weather), satellite communication, airport air traffic control.           Shenzhen ATNJ Communication Technology Co.,LTD. is located in Shenzhen, Silicon Valley, China. Committed to the research and development, production and sales of active phased array radar, software defined radio (SDR) platform, software radio custom AI algorithm, Ultra-wideband power amplifier, RF module, communication network optimization solutions and other products, is a professional OEM/ODM radio equipment research and development type manufacturing plant.      The future is an era of rapid development of low-altitude economy and the outbreak of artificial intelligence. As an industry leader, ATNJ always follows the pulse of The Times, adheres to the original aspiration, is committed to providing customers with excellent communication solutions, providing quality OEM and customized ODM services.   We always adhere to the customer-centered, provide a full range of services. From product consulting, program design, customized development, design and production one-stop services. Our goal is to ensure that customers can feel our professional services while enjoying quality products. To provide customers with strong competitive communication products, to meet the rapid development of the market demand, to achieve common development with users, we look forward to working with you to create a better future!  

Dear all:We cordially invite you to attend MWC Doha 2025 in Qatar. As the premier global event in the mobile communications industry, the MWC series has consistently set the pace for industry trends, bringing together thought leaders, innovation pioneers, and policymakers from around the world. This marks the first time MWC is being held in Doha, offering you an unparalleled experience.Address: Doha Exhibition and Convention Center (West-bay, P.O. Box 10600 - Doha, Qatar)Date: 25th-26th NovBOOTH NUMBER: G40Qatar is committed to building an advanced digital society, and MWC Doha 2025 was born out of this commitment. The exhibition will help Qatar achieve its 2030 digital agenda and national vision, promote digital transformation in the Middle East, and enhance Qatar's and the region's influence in the field of global scientific and technological innovation. This is not only a showcase of technology, but also an important platform for promoting industry cooperation and progress.As a major global event in the field of mobile communications, MWC Doha will bring together industry leaders, decision-makers, and innovators from around the world. Here, you will engage in in-depth exchanges with elites from all over the world, jointly explore cutting-edge technologies and development trends in the industry, obtain the latest market dynamics and information, and unlock unlimited opportunities for your career development. At the same time, you will have the opportunity to experience firsthand the achievements of digital transformation in the fields of artificial intelligence, advanced 5G technology, and smart mobility, and witness the rapid progress of technology.This exhibition provides you with a unique platform for communication and cooperation. You can establish close ties with industry peers, expand your business scope, and seek more opportunities for cooperation. You can also engage in in-depth discussions with industry experts, gain professional insights, and help your company stand out in the fierce market competition.We expect to join you at MWC Doha 2025 to usher in a new chapter in the mobile communications industry and drive the progress and development of the digital society together!Best regards, Shenzhen ATNJ Communication Technology Co.,LTD

Shenzhen ATNJ Communication Technology Co., Ltd., founded in 2010, is a company that integrates research and development, manufacturing, sales, and technical services. It is a professional radio frequency (RF) product manufacturer with mature experience. The main products include custom-developed SDR digital core boards, LTE/NR (micro, medium, high) power series analog/digital optical fiber digital selective band repeaters & DAS systems, wireless frequency modules, passive modules, public and private network systems, and base station technology solutions. Additionally, the company undertakes various RF and wireless repeater operation and maintenance services and projects, multi-band, multi-sub-band, multi-MIMO DAS systems, remote network management center OAM, and supplies for indoor and outdoor signal coverage projects.   Here we highlight the key service that guarantees our unwavering commitment : ①. Active DAS: Off-air repeater, frequency shift repeater, fiber optic repeater, and inline booster. ②. In cabinet active RF module&parts: LNA, PA, optic transceiver, channel/band selector, frequency shifter, bias tee, PSU.  ③. In cabinet passive RF module&parts: multiplexer, filter, channel combiner, semi-rigid/flexible jumper. ④. Passive DAS: POI, multi-band combiner, hybrid combiner, splitter, coupler, tapper, cable assembly, antenna. ⑤. SDR (Software Defined Radio) Core Board Custom Development and Solutions. ⑥. Phased array radar technology and software algorithm. ⑦. ECM system. ⑧. Critical communications solution.  ⑨.  Public/private network BTS solution. Range This product is designed for fiber optic repeaters in mobile communication systems, facilitating the photoelectric conversion and transmission of uplink and downlink signals for the repeaters. RF Technical Specifications Table 1. RF Index Specifications Index Notes Frequency band 800-2700MHz The primary test frequency bands cover the 2G/3G/4G spectrums currently deployed by China Mobile, China Unicom, and China Telecom Transmit optical wavelength 1550±20nm   Receive optical wavelength 1310±20nm   Cascade Stages 1 take 4   Optical Output Power -3±1dBm Optical Port Power Measurement Using Optical Power Meter   4dBm±1dBm ‌Laser Emission Power Verification via GUI Software ‌Transmit Loss of Light (TXLOL) ≤-3dBm IF (Laser Output Power ≤ -3dBm ±0.2dB) THEN ASSERT "TX_OPD_ALARM"ELSE MAINTAIN "NORMAL_OPERATION_STATE" ‌Receive Loss of Signal  (RXLOS) ≤-10dBm   Link gain UL:0±2.5dB Direct or single-drop connection   DL:0±2.5dB   Automatic Gain Compensation (AGC) Function Insertion Loss of 1x4 Headend Module Connection≤3dB Asymmetric Gain Compensation with Variation Rate of±2dB ‌Flatness In Band 824~835MHz,869~880MHz,890~915MHz,935~960MHz,1710~1785MHz,1805~1880MHz,1880~1920MHz,1920~1980MHz,2110~2170MHz,2320~2370MHz≤1dB 2515~2675MHz≤2dB   VSWR ≤1.5   Second Harmonic Component 890MHz input -13dBm,1780MHz output≤-80dBm   Intermodulation UL:≤-55dBc,(-8dBm input/2CH)Total input powe-5dBm,per carrier is 8dBm Test 1:‌Near/Far End 1+1 Testing @ 600kHz Spacing; (Final results subject to your company's test data)   DL:≤-60dBc(-3dBm input/2CH) Total input powe0dBm,per carrier is 3dBm   Noise floor UL ≤-130dBm/Hz LINK GAIN=0dB,‌Test Configuration: Cascaded 1:1 Connection (AGC Compensation Enabled)(Final results subject to your company's test data)   DL ≤-125dBm/Hz   RF isolation ≥50dB   Delay ≤100ns   Gain Adjustment Range ≥15dB MU Uplink Gain Step Size 1dB MU Uplink ‌Gain Setting Error 0～15 error≤1dB； MU Uplink Working temperature -20～70℃   Power supply DC+9V~+12V,Power consumption less than 4W   Monitoring Interface Equipped with a DB9 female connector providing two RS485 interface; Communication baud rate: 9600 bps   WDM Built-in  

Suitable for: Active phased array radar, Low-altitude integrated supervision platform, Radio counter flight and air control, Ultra-wideband SDR (software-defined radio) boards, Special computer ( Tri-proof laptop) , Digital global repeater system 1. Technical Specifications: NO. Item Technical Specifications     LTE900-RX LTE900-TX LTE1800-RX LTE1800-TX LTE2100-RX LTE2100-TX 1 Band Frequency 880-915MHz 925-960MHz 1710-1785MHz 1805-1880MHz 1920-1980MHz 2110-2170MHz 2 Bandwidth 35MHz 35MHz 75MHz 75MHz 60MHz 60MHz 3 In-band insertion loss ≤3.0dB ≤3.0dB ≤2.6dB ≤3.0dB ≤2.5dB ≤1.5dB 4 In-band ripple ≤1.5dB ≤1.5dB ≤2.0dB ≤2.0dB ≤1.5dB ≤0.8dB 5 Rejection ≥90dB @925-960MHz ≥95dB @880-915MHz ≥95dB @1805-1880MHz ≥100dB @1710-1785MHz ≥100dB @1920-1980MHz ≥95dB @1805-1880MHz≥95dB @2110-2170MHz ≥100dB @1920-1980MHz 6 Isolation ≥95dB 7 VSWR ≤1.25 8 Power Capacity 10W(AVG) 9 Characteristic Impedance 50Ω 10 Temperature -10℃～+60℃ 11 Connector types SMA-Female 12 Size ≤156×100×70 mm(L*W*H) 13 Color Grey 2. Interface Position Diagram: Shenzhen ATNJ Communication Technology Co., Ltd., founded in 2010, is a company that integrates research and development, manufacturing, sales, and technical services. It is a professional radio frequency (RF) product manufacturer with mature experience. The main products include custom-developed SDR digital core boards, LTE/NR (micro, medium, high) power series analog/digital optical fiber digital selective band repeaters & DAS systems, wireless frequency modules, passive modules, public and private network systems, and base station technology solutions. Additionally, the company undertakes various RF and wireless repeater operation and maintenance services and projects, multi-band, multi-sub-band, multi-MIMO DAS systems, remote network management center OAM, and supplies for indoor and outdoor signal coverage projects. Here we highlight the key service that guarantees our unwavering commitment : ①. Active DAS: Off-air repeater, frequency shift repeater, fiber optic repeater, and inline booster. ②. In cabinet active RF module&parts: LNA, PA, optic transceiver, channel/band selector, frequency shifter, bias tee, PSU.  ③. In cabinet passive RF module&parts: multiplexer, filter, channel combiner, semi-rigid/flexible jumper. ④. Passive DAS: POI, multi-band combiner, hybrid combiner, splitter, coupler, tapper, cable assembly, antenna. ⑤. SDR (Software Defined Radio) Core Board Custom Development and Solutions. ⑥. Phased array radar technology and software algorithm. ⑦. ECM system. ⑧. Critical communications solution.  ⑨.  Public/private network BTS solution.

                                Microwave Frequency-Shifting Repeater System       The Microwave Frequency-Shifting Repeater is a fundamental tool for extending microwave backbone networks. By receiving a signal on one frequency, amplifying it, and retransmitting it on a different frequency, it overcomes the critical feedback problem inherent in simple amplification. This characteristic, combined with high gain, directional antennas, and robust design, allows network operators to bypass LOS obstacles and economically expand coverage and capacity across challenging terrains, forming the invisible backbone for critical communication services.   Diagram   Operating Principle of the RF/Microwave Frequency-Converting Near-End Unit (MU+RU) in a Microwave Frequency-Shifting Repeater System--The MU consists of a MU radio frequency unit, a near-end microwave RU, and a microwave antenna. The microwave unit and the RF unit are connected with a coaxial cable. The power supply mode of the microwave unit is coaxial cable feeding mode.   Product Features: • Frequency Translation: Receives an incoming microwave signal on one specific frequency •Self-Interference Mitigation: The primary purpose of frequency shifting is to avoid feedback oscillation •Simplex Operation: Typically operate in one direction •Spectrum Utilization: Consume additional spectrum resources because they transmit on a different frequency than they receive •Deployment Flexibility: Enable coverage extension in areas where direct fiber or cable installation        

Function Description of Each Module of the System   1. Log-periodic Antenna_1 Band frequency: 25 MHz - 6000 MHz. It is responsible for the transmission and reception of radio frequency signals. It can radiate the processed signals into space (for transmission), and also capture the radio frequency signals in space (for reception), achieving the "air interface" between the signal and the outside world.   2. RF Switch Used for switching the RF signal path, it enables flexible selection of the signal transmission route. For instance, under different test modes and interference strategies, the signal can be directed to different processing modules, antennas, etc., thereby achieving flexible configuration of the system functions.   3. Amplifier Set1 Amplify the radio frequency output signal to enhance the signal strength, ensure that the test signal can reach the expected coverage range and power level, and optimize the quality of the transmitted signal.   4. LNA1 Perform pre-amplification on the received signal of the antenna to enhance the signal-to-noise ratio, enabling subsequent signal processing modules to handle the signal more clearly and accurately. This is commonly used to improve the reception of weak signals.   5. Log-periodic Antenna_2 Band frequency: 400 MHz - 6 GHz. This part is responsible for transmitting the radio frequency signals generated by the system (such as interference signals, test signals) into space to achieve spatial coverage of the signals and act on target devices (such as unmanned aircraft).   6. Amplifier Set2 According to the interference requirements, the radio frequency signal is amplified to increase its power, ensuring that the interference signal or test signal can reach the expected coverage range and power level, and meeting the signal strength requirements for scenarios such as "interference (Jamming)".   7. LNA1 Perform pre-amplification on the received signals of the antenna to enhance the signal-to-noise ratio, enabling subsequent signal processing modules to handle the signals more clearly and accurately. This technique is often used to improve the reception of weak signals.   8. Log-periodic Antenna_3 Band frequency: 400 MHz - 6 GHz. Specifically designed for receiving radio frequency signals, it can accurately capture signals within a specific frequency range, providing input for the signal detection and analysis module. It is commonly used to enhance the reception capability of target signals.   9. SDR_8T8R The SDR's 8T8R board card is used to complete the signal detection and processing functions. It mainly includes the signal generation module, the RF signal switch control module, and the receiving signal processing module (signal detection and analysis). The channel control module (which can distribute the generated or processed signals to different antennas, detection devices, etc., to meet the requirements of multi-channel and multi-target signal applications). It has the function of broadband signal detection and analysis, which can detect parameters such as the frequency, power, and modulation characteristics of the signal. At the same time, it can be used as an excitation source to output specific signals, for signal quality detection, characteristic analysis, and system performance verification.   10. Reinforce Computer As the "brain" of the system, it enables remote control, parameter configuration and process management of the entire RF system. By communicating with the SDR board card, it allows setting the parameters of the signal generation module, controlling the RF switch paths, accessing the detection and analysis functions, and presenting the system status and signal data, making it convenient for operators to manage the system operation.