createFeed

Create feed at specified location for custom antenna

Syntax

createFeed(antenna)

createFeed(antenna,point1,point2)

Description

createFeed(antenna) opens the custom antenna mesh in a figure window. In the figure window, you can specify a feed location for the mesh and create a custom antenna. To specify a region for the feed point, select two points, inside triangles on either side of the air gap or inside triangles that share a common edge.

createFeed(antenna,point1,point2) creates the feed across the triangle edges identified by point1 and point2. After the creating feed when you visualize the resulting antenna mesh, the feed location is highlighted.

Examples

Create Feed for Custom Mesh Antenna Using Air Gap Between Triangles

Load a 2-D custom mesh. Create a custom antenna using the points and triangles.

load planarmesh.mat;
c = customAntennaMesh(p,t)

c = 
  customAntennaMesh with properties:

          Points: [3×658 double]
       Triangles: [4×1219 double]
    FeedLocation: []
       Conductor: [1×1 metal]
            Tilt: 0
        TiltAxis: [1 0 0]
            Load: [1×1 lumpedElement]

Use the createFeed function to view the antenna mesh structure. Pick and Undo buttons are visible at the right side of the window, where the Pick button is highlighted.

createFeed(c);

Click Pick to display the cross-hairs. To specify a region for the feed point, zoom in and select two points, one inside each triangle on either side of the air gap.

Select the points using the cross-hairs.

Selecting the second triangle creates and displays the antenna feed.

Create Feed for Custom Mesh Antenna Using Triangles Sharing Edge

Load a 2-D custom mesh. Create a custom antenna using the points and triangles.

load planarmesh.mat;
c = customAntennaMesh(p,t)

c = 
  customAntennaMesh with properties:

          Points: [3×658 double]
       Triangles: [4×1219 double]
    FeedLocation: []
       Conductor: [1×1 metal]
            Tilt: 0
        TiltAxis: [1 0 0]
            Load: [1×1 lumpedElement]

Use the createFeed function to view the array mesh structure in a figure window. Pick and Undo buttons are visible at the right side of the window, where the Pick button is highlighted.

createFeed(c);

Click Pick to display the cross-hairs. To specify a region for the feed point, zoom in and select two points, one inside each triangle sharing an edge.

Select the points using the cross-hairs.

Selecting the second triangle creates and displays the antenna feed.

Create Feed for Custom Antenna Mesh

Load a 2-D custom mesh using the planarmesh.mat. Create a custom antenna using the points and triangles.

load planarmesh.mat
c = customAntennaMesh(p,t)

c = 
  customAntennaMesh with properties:

          Points: [3×658 double]
       Triangles: [4×1219 double]
    FeedLocation: []
       Conductor: [1×1 metal]
            Tilt: 0
        TiltAxis: [1 0 0]
            Load: [1×1 lumpedElement]

show (c)

Create the feed for the custom antenna across the points (0.07,0.01) and (0.05,0.05) meters respectively.

createFeed(c,[0.07 0.01],[0.05 0.05])
show(c)

Input Arguments

antenna — Custom planar antenna mesh

customAntennaMesh object

Custom planar antenna mesh, specified as a customAntennaMesh object.

Example: customAntennaMesh

point1,point2 — Points pair to identify feed region

1-by-2 vectors

Points pair to identify feed region, specified as Cartesian coordinates in meters. Specify the points in the format [x₁ y₁], [x₂ y₂].

Example: createFeed(c,[0.07 0.01],[0.05 0.05]);

Version History

Introduced in R2015b