﻿ Horn AntennaExamples | Product | Murata Software Co., Ltd.

# Example4Horn Antenna

### General

• The model is a horn antenna.

• The S-parameters at the feeding port are solved.

• Unless specified in the list below, the default conditions will be applied.

• [How to Reduce the Calculation Time]

### Analysis Space

 Item Settings Analysis Space 3D Model unit mm

### Analysis Conditions

 Item Settings Solver Electromagnetic Analysis [Hertz] Analysis Type Harmonic analysis Options Select “Ignore the influence of face/edge electrode thickness” *

* This is the default setting. There are no face electrodes with this model. Therefore it is irrelevant to select it or not.

Mesh tab, Harmonic analysis tab and Open boundary tab are set as follows.

 Tabs Setting Item Settings Mesh Tab Element type 2nd-order element Multigrid/Adaptive Mesh Method Select “Use the adaptive mesh method”. Frequency-Dependent Meshing Reference frequency: 7.1×10^10[Hz] Select “The conductor bodies thicker than the skin depth constitute the boundary condition.”   The surface of Metal is treated as the boundary condition having some loss, as Metal is thicker than the skin depth. See Effect of Mesh Size for reference. Harmonic analysis Frequency Minimum: 7.1×10^10[Hz] Maximum: 7.1×10^10[Hz] Sweep Type Select Linear step by division number. Division number: 0 Input 1.0[W} Open boundary Type Absorbing boundary Order of Absorbing Boundary 1st degree

### Model

An aluminum horn antenna (Metal) is placed in the cubic air (Air). The feeding point at the inside of the antenna (horn) is
set as I/O port boundary condition. The surrounding of the cubic air is the open boundary.

### Body Attributes and Materials

 Body Number/Type Body Attribute Name Material Name Mesh Size 50/Solid Metal 001_Al * 0.3 51/Solid horn 000_Air(*) 0.3 55/Solid air 000_Air(*)

* Available from the Material DB

### Boundary Conditions

 Boundary Condition Name/Topology Tab Boundary Condition Type Settings port1/Face Electric I/O Port Reference Impedance: Select “Use the characteristic impedance calculated from the port structure” Number of Modes Number of precalculated modes: 5 Number of modes used in the actual analysis: 1 Select modes: none Outer Boundary Condition Electric Open boundary

### Results

The radiation pattern of the horn antenna is plotted with polar graph.

The unit is [dB].

• See [Exercise 7: Dipole Antenna].

﻿