EngeePhased.SincAntennaElement
An antenna with a directional pattern in the form of a cardinal sine.
| Library |
|
Description
An object EngeePhased.SincAntennaElement simulates an antenna with a radiation pattern in the form of a cardinal sine (see A directional pattern in the form of a cardinal sine). Such an antenna is a uniformly irradiated rectangular antenna.
Antennas with a cardinal-sine radiation pattern are often used as an approximation for sector antennas or antenna arrays.
The side lobes are −13.6 dB relative to the gain of the main beam. The axis 0° by azimuth angle and 0° The angle of the location is considered the main axis of the antenna pattern. When placed in a linear or rectangular grid, the main axis coincides with the grid normal.
To create and use a dipole antenna, follow these steps:
-
Create an object EngeePhased.SincAntennaElement and set its properties.
-
Call the object with arguments as if it were a function.
To learn more about how to work with system objects, see Engee System Objects.
Syntax
Creation
-
antenna = EngeePhased.SincAntennaElement()— creates an antenna with a radiation pattern in the form of a cardinal sine with default property values. -
antenna = EngeePhased.SincAntennaElement(Name=Value)— creates an antenna with a radiation pattern in the form of a cardinal sine with specified properties in the form of a pairName=Value, whereName— the name of the property, andValue— the appropriate value. You can specify multiple pairs «name-value» the order of the pairs does not matter. Unspecified properties retain their default values.
Arguments
Input arguments
FREQ — the operating frequencies of the antenna element
+
scalar | vector is a string of length L
Details
The antenna’s operating frequencies, specified as a real positive scalar or a real vector, are strings of length containing positive numbers.
Typical values are in the range FrequencyRange.
Otherwise, the element does not have a directional pattern and returns it as −Inf.
The units of measurement are Hz.
| Типы данных |
|
ANG — azimuth angle and angle of the radiation pattern location
+
vector is a string of length M | the 2 by M matrix
Details
The directions of the radiation pattern, specified as a real vector, are strings of length or a real matrix on .
If ANG is a matrix, then each column defines a direction in the form [azimuth; elevation]. The azimuthal angle should be in the range of −180° before 180° inclusive. The angle of the seat should be in the range of −180° before 180° inclusive.
If ANG is a string vector, each element sets the azimuth angle of the direction. In this case, the corresponding seat angle is assumed to be 0°.
The units of measurement are degrees.
For more information about the azimuth angle and the location angle, see Azimuthal angles and location angles.
| Типы данных |
|
Features
# FrequencyRange — operating frequency range
+
[0.0 1.0e20] (by default) | A non-negative real vector is a 1 by 2 row
Details
The operating frequency range of the antenna, set as a non-negative real vector on in the format [LowerBound HigherBound]. The antenna element does not have a radiation pattern outside the specified frequency range.
The units of measurement are Hz.
#
Beamwidth is
the beam width of the antenna
pattern
[10 10] (by default) | scalar | The real vector is 1 by 2
Details
The beam width of the antenna pattern, set as a scalar or vector with a real value on .
If the specified value is a vector on , it has the form [AzimuthBeamwidth ElevationBeamwidth].
If the specified value is a scalar, then the beam width along the azimuth angle and the angle of the location are equal.
The units of measurement are degrees.
Additional Info
A directional pattern in the form of a cardinal sine
Details
System object EngeePhased.SincAntennaElement returns a radiation pattern in the form of a cardinal sine.
If — azimuthal angle in degrees, and — the angle of the place in degrees, then the directional pattern has the form:
where
— azimuth coefficient, which depends on the azimuth angle and the beam width at the half-power level along the azimuth angle :
+
+ Specify as the first element of the Beamwidth;
-
— the coefficient of the place, which depends on the angle of the place and the beam width at the half-power level at the angle of the seat :
Specify as the second property element Beamwidth;
-
— the normalization factor, which provides half power corresponding to the beam width at half power. This coefficient is the solution: