Ferrite loaded meander line loaded antenna
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorsJohn T. Apostolos, Frank M. Caimi
Life of this patent
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Abstract
A meander line loaded antenna is provided with a ferrite donut surrounding a portion of the meander line so as to effectively lower the operating range of the meander line loaded antenna by as much as 30%. At the lower frequencies the ferrite material introduces a minimal loss of 2 to 3 dB, whereas at the higher frequency range very little current passes through the meander line thus eliminating any effect of the ferrite on antenna performance. The utilization of the ferrite surrounding a meander line element permits the use of the miniaturized antenna and size for size reduces the low frequency cut off of the antenna.
Claims12
In a meander line loaded antenna in which the meander line has a number of sections, a method for lowering the low frequency cut off of the antenna without affecting the high frequency cut off, comprising:
- completely surrounding one of the meander line sections with ferrite, whereby the size of the antenna need not be increased to lower the low frequency cut off thereof.
A method of electrically lengthening an element of a meander line comprising completely surrounding at least a portion of the element with ferrite.
A wide bandwidth meander line loaded antenna having a reduced low frequency cut off, comprising:
- a ground plane;
- a top plate;
- a meander line having segments and located between the ground plane and top plate;
- and, ferrite disposed completely about a segment of the meander line, thus to increase the effective electrical length thereof.
Dependencies are inferred from the claim text.