# Excitation

Excitation data consist of voltage sources, plane waves, waveguide sources, equivalent sources and Hertzian dipoles.

## Voltage Sources on Segments

EXCITATION BY VOLTAGE SOURCE AT A SEGMENT Name: Excitation index: 1 Frequency in Hz: FREQ = 7.49481E+07 Wavelength in m: LAMBDA = 4.00000E+00 Open circuit voltage in V: |U0| = 1.00000E+00 Phase in degrees: ARG(U0) = 0.00 Attached to port: Segment port Port at segment with label: 1 Absolute number of segment: 11 Radius of segment in m: 2.00000E-03 Location of the port in m: x = 0.00000E+00, y = 0.00000E+00, z = 0.00000E+00 Positive direction: x = 0.00000E+00, y = 0.00000E+00, z = 1.00000E+00

Similar information is provided for other voltage sources (such as a voltage source on an edge port and on a microstrip port and a voltage source connected to a general network).

## Waveguide Ports and Waveguide Sources

DATA FOR WAVEGUIDE PORTS Waveguide port label: Port Port type: Rectangular Port dimensions Width: 1.29600E-01 m Height: 6.48000E-02 m Port reference points in m: Point S1: x = -2.37927E-01, y = -6.48000E-02, z = -3.24000E-02 Point S2: x = -2.37927E-01, y = 6.48000E-02, z = -3.24000E-02 Direction of propagation: x = 1.00000E+00, y = 0.00000E+00, z = 0.00000E+00

MODE EXPANSION DATA OF A WAVEGUIDE PORT Waveguide port label: Port Frequency: 1.64500E+09 Hz Mode indices Cutoff freq. Transverse wave impedance Propagation factor Description m n in Hz real part imag. part real part imag. part TE 0 1 2.3132E+09 0.0000E+00 3.8105E+02 3.4085E+01 0.0000E+00 Evanescent TE 0 2 4.6264E+09 0.0000E+00 1.4331E+02 9.0626E+01 0.0000E+00 Evanescent TE 1 0 1.1566E+09 5.2979E+02 0.0000E+00 0.0000E+00 2.4515E+01 Propagating TE 1 1 2.5862E+09 0.0000E+00 3.1053E+02 4.1826E+01 0.0000E+00 Evanescent TE 1 2 4.7688E+09 0.0000E+00 1.3845E+02 9.3812E+01 0.0000E+00 Evanescent TE 2 0 2.3132E+09 0.0000E+00 3.8105E+02 3.4085E+01 0.0000E+00 Evanescent TE 2 1 3.2713E+09 0.0000E+00 2.1916E+02 5.9264E+01 0.0000E+00 Evanescent TE 2 2 5.1725E+09 0.0000E+00 1.2637E+02 1.0277E+02 0.0000E+00 Evanescent TM 1 1 2.5862E+09 0.0000E+00 4.5703E+02 4.1826E+01 0.0000E+00 Evanescent TM 1 2 4.7688E+09 0.0000E+00 1.0251E+03 9.3812E+01 0.0000E+00 Evanescent TM 2 1 3.2713E+09 0.0000E+00 6.4758E+02 5.9264E+01 0.0000E+00 Evanescent TM 2 2 5.1725E+09 0.0000E+00 1.1230E+03 1.0277E+02 0.0000E+00 Evanescent

EXCITATION BY IMPRESSED WAVEGUIDE MODE Name: Excitation index: 1 Frequency in Hz: FREQ = 1.64500E+09 Wavelength in m: LAMBDA = 1.82245E-01 Impressed mode: TE 1 0 Amplitude in A/m: 1.00000E+00 * PWFAKTOR (see below) Phase in degrees: 0.00 Transmitted power in W: 1.13772E+00 * PWFAKTOR^2 (see below) Attached to port label: Port

## FEM Current Source

EXCITATION BY IMPRESSED CURRENT ELEMENT (FEM) Name: CurrentSource1 Excitation index: 1 Frequency in Hz: FREQ = 3.00000E+09 Wavelength in m: LAMBDA = 6.54669E-02 Amplitude in A: |I| = 1.00000E+00 Phase in degrees: ARG(I) = 0.00 Attached to port: FEM line port Start point of the port in m: x = 0.00000E+00, y = 6.50000E-03, z = -1.00000E-03 End point of the port in m: x = 0.00000E+00, y = 6.50000E-03, z = 0.00000E+00 Port length in m: 1.00000E-03

## FEM Modal Source

MODE EXPANSION DATA OF A MODAL PORT FEM modal port: Port1 Frequency: 3.00000E+09 Hz Eigenvalues computed with ARPACK [Z] Mode Propagation factor Description counter real part imaginary part 1 0.00000E+00 9.59751E+01 Propagating (fundamental mode)

EXCITATION BY IMPRESSED MODAL PORT MODE Name: FEMModalSource1 Excitation index: 1 Frequency in Hz: FREQ = 3.00000E+09 Impressed mode: Fundamental Amplitude in V/m: 1.00000E+00 Phase in degrees: 0.00 Transmitted power in W: 5.00000E-01 Attached to port: Port1

## Plane Wave Source

EXCITATION BY INCIDENT PLANE ELECTROMAGNETIC WAVE Name: Excitation index: 1 Frequency in Hz: FREQ = 1.49896E+07 Wavelength in m: LAMBDA = 2.00000E+01 Direction of incidence: THETA = -180.00 PHI = 0.00 Polarisation: LINEAR Axial ratio: V = 0.0000 Polarisation angle: ETA = 0.00 Direction of propag.: BETA0X = 0.00000E+00 (unit vector) BETA0Y = 0.00000E+00 BETA0Z = 1.00000E+00 Wave number: BETA0 = ( 3.14159E-01 +j 0.00000E+00) Phase reference point in m: x = 0.00000E+00, y = 0.00000E+00, z = 0.00000E+00 Field strength in V/m: |E0X| = 1.00000E+00 ARG(E0X) = 0.00 (Phase in degrees) |E0Y| = 0.00000E+00 ARG(E0Y) = 0.00 |E0Z| = 0.00000E+00 ARG(E0Z) = 0.00

The vector $\beta $ , whose components are given, is the vector which points in the direction of propagation. The vector ${E}_{0}$ represents the direction of the electric field.

## Near Field Source

EXCITATION BY NEAR FIELD SOURCE Name: NearFieldSource1 Aperture number: 1 Frequency in Hz: FREQ = 1.64500E+09 Wavelength in m: LAMBDA = 1.82245E-01 Number of electric dipoles: 90 (of which 20 suppressed) Number of magnetic dipoles: 90 (of which 32 suppressed) Extent of the source: X = -5.83200E-02 ... 5.83200E-02 m Y = -2.59200E-02 ... 2.59200E-02 m Z = -2.56439E-01 ... -2.56439E-01 m

## Impressed Radiation Pattern

EXCITATION BY A FAR FIELD POINT SOURCE Name: RadiationPattern1 Excitation index: 1 Frequency in Hz: FREQ = 1.60000E+09 Wavelength in m: LAMBDA = 1.87370E-01 Max. field strength * dist. in V: 5.91419E+01 * PWFAKTOR (see below) Radiated power in W: 1.12755E+00 * PWFAKTOR^2 (see below) Directivity of the antenna in dB: 17.138 Distance for far field cond. in m: 1.96442E+00 Source position in m: x = 0.00000E+00, y = 0.00000E+00, z = 0.00000E+00 Number of grid points NTHETA = 37 NPHI = 73 Angular range THETA in degrees: 0.00 ... 180.00 PHI in degrees: 0.00 ... 360.00

## Spherical Mode Source

For an impressed spherical mode source, the following information is written to the output:

EXCITATION BY AN IMPRESSED SPHERICAL MODE Name: SphericalModesSource1 Excitation index: 1 Frequency in Hz: FREQ = 6.25000E+09 Wavelength in m: LAMBDA = 4.79668E-02 Source position in m: x = 0.00000E+00, y = 0.00000E+00, z = 2.54000E-01 Rotation about the axes: X = -180.00 Y = 48.46 Z = 0.00 Number of modes: 880 (of which 38 suppressed) Propagation direction: C = 4 (outwards) mode indices coefficient in sqrt(Watt) rad. power(Watt) J S M N magn. phase power 1 1 -1 1 2.54050E-05 -25.23 3.22706E-10 2 2 -1 1 4.50632E-05 1.04 1.01535E-09 3 1 0 1 5.41621E-07 40.48 1.46677E-13

## Hertzian Dipoles

EXCITATION BY ELECTRIC DIPOLE Name: ElectricPointSource1 Excitation index: 1 Frequency in Hz: FREQ = 3.00000E+08 Wavelength in m: LAMBDA = 9.99308E-01 Amplitude in Am: |IL| = 1.00000E+00 Phase in degrees: ARG(IL) = 0.00 Dipole position in m: x = 0.00000E+00, y = 0.00000E+00, z = 0.00000E+00 Orientation of dipole: THETA = 0.00 PHI = 0.00

The above output is for an electric dipole. The magnetic dipole will have similar output.