Solution Overview

Radar technology is a critical capability for flight safety, precision navigation, space applications, and more. To meet future electromagnetic spectral operation requirements, modern radars are increasingly being designed to be frequency agile with cognitive and multi-modes while utilizing ultra-broadband active electronically scanned arrays (AESA) to dynamically adapt to the ever-changing electromagnetic spectrum. Additionally, modern radars are increasingly being designed with the goal of improving EW resilience and low probability of intercept (LPI) with multi-function and perception capabilities, Radar, EW and Comms.

Due to the increased complexity and cost of designs, finding issues before open-air range test has never been more important. Today, radar engineers are leveraging powerful modeling and simulation tools to digitally test systems prior to implementation. Most leading Radar Manufacturers leverage Hardware in the Loop integration testing to minimize risk and find problems early in the design cycle. The Radar System Simulator is a powerful system for populating real Radar systems in the lab or during production testing to validate system performance or provide final functional testing before when deployed.

The future

The VI signal generation library includes features CW, LFM, NLFM, FSK, SFM, P1, P2, P3, P4, Zadoff-Chu, Frank, with PW and PRI schema configurations.

Radar Simulation Parameters

With easy to use, interactive interface panels for developing and debugging systems, to automatable APIs for deploying both characterization as well as production test systems, the RADAR SIMULATION provides a unified software experience for Radar. In addition to easy-to-use panels, the library also includes support for several development environments including LabVIEW, C, C#, and .NET, as well as for FPGA programming.

Transmit and analyze Radar signals

Parameters

• Radar Waveforms: Signal generation library includes CW, LFM, NLFM, FSK, SFM, P1, P2, P3, P4, Zadoff-Chu, Frank, and Barker features with PW and PRI schema configuration
• Ability to train impulses:
• Flexibility in frequency: Fixed, Linear/ Non Linear Step, Hopping, List/ Random
• Flexibility in pulse width: Pulse Width Agility: Fixed, Linear/ Non Linear values, List/Random
• PRI: Fixed, Stagger, Jitter, Linear/Non Linear, List/Random
• Modulation: Pulsed, Phase coding
• Antenna
• Antenna radiation diagram: azimuth, elevation, raster
• Antenna type: Isotropic, Sine, Cosec-Squared, Cosine-Squared, Fan, Fan, Phased Array, Digital beam forming
• Antenna scanning type: Lock, Circular, Sector

Radar Target Generator

The Radar Target Generation (RTG) Driver provides additional functionality for the PXIe Vector Signal Transceiver (VST) for radar system level test. The Vector Signal Transceiver (VST) combines an RF vector signal analyzer and generator with a programmable FPGA and digital interfaces for real-time signal processing and control.

The RTG driver is built on top of the VST as a closed-source, license-restricted, and pre-compiled FPGA personality that allows the VST to operate as a closed-loop, real-time radar target generator. With this driver, engineers can inject up to four independent targets with configurable range (time delay), velocity (Doppler frequency offset), and path loss (attenuation) into a radar for testing. In its default personality, the VST is a calibrated RF generator and analyzer. Beyond the standard VST calibration, the RTG driver includes a loop-back calibration, which enables users to apply accurate time delay and attenuation by de-embedding residual and external cabling and fixture effects. The RTG Driver is a great solution for engineers needing to do basic functional validation of radars, production tests, or MRO.

Echo Simulator supports target echo simulation for fast single pulse identification and tracking radar using 4-channel coherence simulation for Sum, ΔAz, ΔEl and Guard.

Operating frequency ranges from 1 GHz to 18 GHz with up to 1 GHz bandwidth; the system is capable of simulating echo signals with parameters Range, Doppler, Radar Cross Section, ECM Features, Antenna Patterns, Net Losses, etc .

Parameters:

• Frequency 9 kHz to 6 GHz
• Up to 1 GHz bandwidth
• Simulate 4 channel combination for Sum, ΔAz, ΔEl & Guard channels
• >8 targets per beam and 60 to 80 targets in complete Antenna Scan.
• Simulate trajectories for aircraft and targets using Constelli’s Combat Scenario Builder
• Target Simulation Scenario for Range, Doppler and RCS models – Swerling models 0,1,2,3 & 4
• ECM features such as RGPO/I, VGPO/I and Jamming
• Overlapping goals
• Simulate Antenna diagram
• Comprehensive guide documents

FPGA programming and integrated software

With the need for accuracy for flying objects, the STK software driver/plugin is integrated to help create simulated flying target parameters that are close to reality.

Additionally, the system implemented with open-feature FPGA programmability can help researchers and students obtain real-time I/Q data for their purposes.

System Overview

Our company always wishes to become a reliable partner and a leading supplier of equipment and solutions for the success of our customers. For more detailed information, please contact:

MITAS Hanoi Technology JSC

Address: 5th Floor, C’Land Building, No. 81 Le Duc Tho St., My Dinh 2 Ward, Nam Tu Liem Dist., Hanoi, Vietnam           

Web: https://mitas.vn  | Tel: (+84) 243 8585 111 | Email: sales@mitas.vn

The trust and support of our customers are a driving force and an invaluable asset to our company. We sincerely thank you./.

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Drone-based antenna radiation pattern characterization for low-frequency range antennas (the frequency range of naval ship antennas) fixed on complex systems is challenging when performing field measurements in remote areas, especially for antennas with large sizes and weights. Therefore, the idea of using unmanned aerial vehicles (UAVs) to integrate automatic data collection and processing was invented.

However, in terms of investment efficiency, using a drone model is not an economically effective solution because the cost of a drone is too high. Based on the need to build pattern characterization for fixed antennas on naval ships with a low budget, leading experts in the field of antenna measurement and quality assessment from Anritsu have come up with a solution using a handheld spectrum analyzer with minimal size and weight mounted on a drone, collecting data, then processing it with software to reduce costs and improve investment efficiency significantly.

Technical solution

• Working frequency range: up to 110 GHz
• Types of antennas that can be measured: phased network antennas, parabolic antennas, etc.
• The size of the largest open surface of the antenna needs to be measured in the azimuth plane: up to 16m
• The size of the largest open surface of the antenna needs to be measured according to the abtuse angle plane: up to 4m
• Antenna gain coefficient to be measured: The maximum that can be measured is 50 dB
• Side beamwidth level of the antenna to be measured: The maximum that can be measured is 45 dB
• Polarization types: vertical, horizontal
• Directional diagram of the antenna to be measured in azimuth: 360 degrees
• Directional diagram of the antenna to be measured according to the abtuse angle: fixed

With the above features, antenna parameters that can be measured and evaluated include:

• 2D and 3D diagrams of the azimuth and elevation angle planes
• E, H plane polarization
• Antenna gain coefficient, directivity
• Maximum radiation angle

Basic measuring principles

Description of the basic measurement method using the far field method:

From the requirements for testing radar antennas installed on naval ships, with complex connections, large size and weight, disassembly is completely difficult, further requiring a system. Far-field measurements are complicated and cumbersome.

The antenna to be measured will be fixed on the ship or mounting system.

The receiving antenna will be installed on the control aircraft to perform testing at a distance far enough to ensure the pah properties of the signal at the contact surface of the irradiated antenna.

To ensure measurement accuracy, the distance between the antenna to be measured and the transmitting antenna must ensure:

Distance ≥ 2D^2/l

Where: D is the open-face size of the antenna

l is the wavelength of the antenna to be measured

Structure and composition of measuring solution

The diagram of the antenna solution using the far-field measurement method, giving the diagram is described as follows:

– Signal collection part:

– Power supply to the receiver:

– Total volume of the receiver

Advantages of the solution

• Using drones and handheld spectrum analyzers has significantly reduced the size of the system, reduced costs, and increased cost efficiency
• The receiver has a wide working range, is high quality, suitable for many types of antennas, and produces accurate results
• Completely eliminate the need to disassemble and move large antennas when performing measurements
• Eliminate the influence of terrain on measurements
• Because there is no reference antenna system to align the phase, this solution is only suitable for measuring antenna radiation reduction.

Limitations of the solution:

• Drones have limited battery life, making it challenging to perform long, continuous measurements

The solution does not meet the requirements for measurements that require high accuracy. However, regarding investment efficiency and testing needs, this solution suits projects with low budgets.

Our company always wishes to become a reliable partner and a leading supplier of equipment and solutions for the success of our customers. For more detailed information, please contact:

MITAS Hanoi Technology JSC

Address: 5th Floor, C’Land Building, No. 81 Le Duc Tho St., My Dinh 2 Ward, Nam Tu Liem Dist., Hanoi, Vietnam           

Web: https://mitas.vn  | Tel: (+84) 243 8585 111 | Email: sales@mitas.vn

The trust and support of our customers are a driving force and an invaluable asset to our company. We sincerely thank you./.

Chia sẻ

Chia sẻ