Debian Electronics Radio (RF and Microwave) development packages

atlc is a computer aided design (CAD) package for the design and analysis of electrical transmission lines and directional couplers of totally arbitrary cross section and an arbitrary number of different dielectrics.

By analysis, it is assumed one requires finding the electrical properties of a transmission line or coupler, where the physical dimensions of the device are known. By design, it is assumed one requires a transmission line or coupler to have certain electrical properties and one wishes to find how to physically realise such a structure

atlc likely to be of use to radio amateurs, professional RF engineers, students and academics.

More information on atlc is available at http://atlc.sourceforge.net/

Meep is a free and open-source software package for electromagnetics simulation via the finite-difference time-domain (FDTD) method.

Its features include:

• Free and open-source software under the GNU GPL.
• Complete scriptability via Python, Scheme, or C++ APIs.
• Simulation in 1d, 2d, 3d, and cylindrical coordinates.
• Distributed memory parallelism on any system supporting MPI.
• Arbitrary anisotropic electric permittivity ε and magnetic permeability μ, along with dispersive ε(ω) and μ(ω) including loss/gain, nonlinear (Kerr & Pockels) dielectric and magnetic materials, electric/magnetic conductivities σ, and saturable gain/absorption.
• Perfectly-matched layer (PML) absorbing boundaries as well as Bloch-periodic and perfect-conductor boundary conditions.
• Exploitation of symmetries to reduce the computation size, including even/odd mirror planes and 90°/180° rotations.
• Arbitrary current sources including a guided-mode launcher.
• Frequency-domain solver for finding the response to a continuous-wave (CW) source.
• ε/μ and field import/export in the HDF5 data format.
• GDSII file import for planar geometries.
• Materials library containing predefined broadband, complex refractive indices.
• Field analyses including Poynting flux, mode decomposition, near to far transformations, frequency extraction, local density of states (LDOS), modal volume, Maxwell stress tensor, arbitrary functions; completely programmable.

This package contains the software.

This updated and modernized translation of NEC2 from Fortran to C has been hand optimized and removes many limitations in the original code. It includes SOMNEC to produce Sommerfield ground solutions.

It provides a modern, object-oriented library for network analysis (VNA) and calibration which is both flexible and scalable. The toolkit is superb for analyzing S parameter files (touchstone) from vector network analyzers. Plotting of Smith charts is easy with this library.

The original nec2c is a non-interactive command-line application that reads standard NEC2 input files and produces an output file with data requested by "commands" in the input file.

In contrast xnec2c is a GUI interactive application that (in its current form) reads NEC2 input files but presents output data in graphical form, e.g. as wire frame drawings of the radiation pattern or near E/H field, graphs of maximum gain, input impedance, vswr etc against frequency and simple rendering of the antenna structure, including color code representation of currents or charge densities. These results are only calculated and drawn on user demand via menu items or buttons, e.g. xnec2c is interactive and does not execute NEC2 "commands" in batch style as the original does.

You give the dimensions and positions of each element, and the program calculates gain, input impedance, front-to back ratio, beam-patterns etc. An optimisation program 'optimise' tries to optimise a design. The optimiser can also tell you the sensitivity of a good design, to small mechanical errors.