XGtd is a general purpose ray-based electromagnetic analysis tool for assessing the effects of a vehicle or vessel on antenna radiation, estimating radar cross section (RCS), and predicting coupling between antennas. Based on techniques such as Geometric Optics (GO), the Uniform Theory of Diffraction (UTD), Physical Optics (PO), and the Method of Equivalent Currents (MEC), performance and memory requirements are less dependent on the electrical size of objects than full wave methods. This makes it ideally suited for applications with higher frequencies or very large platforms where requirements of a full physics method, such as Finite Difference Time Domain (FDTD), may exceed available computational resources. XGtd also includes a number of capabilities that extend well beyond standard ray-tracing codes to provide high-fi delity outputs that are tailored to its intended applications, including the following:

Far zone radiation incorporates shadowing and scattering from fuselage and wings

Far Zone Radiation, RCS, and EMI/EMC for Electrically-Large Platforms

XGtd®

Visit www.remcom.com/xgtd for a detailed feature list and tour, system requirements, pricing and licensing.

• Far Zone Antenna Radiation for surface-mounted antennas

• Monostatic and bistatic Radar Cross Section (RCS)

• Creeping Wave Diffraction: high-fi delity fi eld prediction in shadow zones

• Doppler for moving transmitters and receivers

• Coupling between antennas (equivalent to S-parameters)

• Wide range of outputs for predicted EM fi elds and channel characteristics

What’s New in XGtd?The latest release of XGtd includes new functionality for radar cross section (RCS) applications. Highlights include:

• New, more accurate model for RCS analysis based on Physical Optics (PO) and the Method of Equivalent Currents (MEC)

• New output types for far zone RCS and antenna gain fi eld points

• Ray path visualization to far zone fi eld points

• Visualization of edges considered by the calculation to be part of curved surfaces

Key Benefi ts of XGtd

■ Far Zone Radiation for Platform- Mounted Antennas

Calculate far zone antenna radiation patterns that incorporate the local effects of the platform.

■ Large Platform Simulations

XGtd’s methods are less strongly affected by the platform’s electric size than typical full wave techniques, allowing modeling of larger, more complex structures.

Radiation from antenna on shuttle

Results agree with XFdtd full physics code

Local radiation on Navy cruiser

XGtdXFdtd

■ Radar Cross Section

The new MEC/PO model

calculates monostatic and bistatic radar cross section with greater accuracy than either MEC or PO alone. Results include both co-polarized and cross-polarized returns. New outputs provide fi eld data and allow visualization of ray paths to far zone RCS fi eld points.

Backscatter from a simple Tomahawk missile validated against a full-wave FDTD model

■ XFdtd/XGtd Hybrid Capability for Higher Fidelity

Calculate antenna radiation patterns for complex antenna designs within XFdtd, incorporating all impedance, coupling and scattering effects. Import into XGtd to determine effects of placement on electrically-large platforms.

■ Coupling & Dominant Paths for EMI/EMC Assessment

Display dominant paths between transmitter and receiver locations; use to better understand propagation or determine methods to mitigate undesired interference or scattering.

Helical antenna in XFdtd mounted on large satellite in XGtd

Dominant paths and receivedpower at second antenna

■ Specialized Anechoic Chamber Editor with RAM Materials

Use Anechoic Chamber Editor to set up and model test geometry and specialized materials within chambers.

C-17 in large anechoic chamber

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• Benefi ts Tour

• Capabilities List

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■ Learn More at www.remcom.com/xgtd

Remcom, Inc.315 S. Allen St., Suite 416

State College, PA 16801 USAwww.facebook.com/remcomsoftware

+1.888.7. REMCOM (US/CAN)+1.814.861.1299 phone+1.814.861.1308 fax

sales@remcom.com

Visit www.remcom.com for more information XG

2.6-0612 ©2012 Rem

com Inc.

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Remcom has been leading the EM market with innovative simulation and wireless propagation tools for 15 years. In addition to our fl agship product, XFdtd, we offer a suite of innovative software and services, accessible and responsive support provided by a staff of experts, and comprehensive training. Our family of products includes:

The full XGtd product, including its powerful graphical user interface, runs on the Windows XP, Vista, and Windows 7 operating systems, including 32-bit and 64-bit versions. The propagation analysis engine runs on both Windows and Linux operating systems and can take advantage of multiple processors to reduce the computation time.