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ACSModel - AM Directional Antenna Moment Method Modeling software

ACSModel is an AM directional antenna moment method modeling program based on the MININEC3 core. It was specifically created to allow engineers to take advantage of the FCC’s moment-method performance verification rules contained in 47 C.F.R. §73.151(c).

The program allows calibration to the measured impedance matrix, detuning of unused radiators and determination of the base- or loop-sampled operating parameters of AM arrays.

The user specifies the frequency, defines the model "wires" (towers and top-loading) and enters the directional parameters. The program runs the unity drive solution, calculates the drive matrix and the user can then run the model with any of several outputs.

ACSModel wire input screen accepts input in Geographic or Cartesian coordinates and freely converts between the two.

In addition to currents, ACSModel provides an output of driving point (source) impedances and power distribution.

******************** SOURCE DATA ********************
Pulse 1 Voltage = (1039.7094, -2271.5258j)
Current = (-3.8208, -26.3879j)
Impedance = (78.726, 50.8j)
Power = 27984.12 Watts

Pulse 21 Voltage = (417.44, -999.7322j)
Current = (20.9472, -1.7989j)
Impedance = (23.851, -45.678j)
Power = 5271.3 Watts

Pulse 41 Voltage = (880.6803, 469.3886j)
Current = (37.3464, 1.276j)
Impedance = (23.983, 11.749j)
Power = 16744.58 Watts

Total Power = 49999.998 Watts

A graphical plot of the produced directional pattern is an available output to allow the user to check the model.

A log-log plot of the E field versus distance is also available to evaluate the effects of reradiators on the far-field.

For subscribers to Au Contraire Software’s broadcast database package, ACSModel will import AM database files generated by AMQuery and AMPAT (including top-loading!), saving the user all the trouble of manually entering the model geometry.

Au Contraire Software, Ltd. was founded by John Furr, CPBE, a well-known broadcast consulting engineer. With his partner Cris Alexander, CPBE, AMD, DRB, the company draws upon over 60 years of experience in allocations work, system design, construction and field tuning of broadcast facilities.

Throughout our many years of work in the communications industry, we have developed software tools that will allow engineers to quickly and accurately perform virtually any allocation study, design task or field project. We have spent years in the world where our clients live and work and have tailored our services to that environment.

Member, Society of Broadcast Engineers (SBE).

Associate Member, Association of Federal Communications Consulting Engineers (AFCCE).







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